chore(server): regenerate embedded tables.html (picks up the shared toast stack)

zddc/internal/handler/tables.html is //go:embed'd and regenerated by ./build,
but it was never refreshed when shared/toast moved to the stacked .zddc-toasts
model (cb1456e) — so the committed embed was stale. ./build brings it current;
no source change here, just the regenerated artifact.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

AGENTS.md

@@ -526,12 +526,12 @@ The in-flight lifecycle slots form a one-way ratchet:
 
   `working/` → `staging/` → `issued/` (WORM)
 
-Each handoff drops `project_team`'s modify rights for the slot they pushed from. At `working/` they have `cr` plus `rwcda` inside their auto-own-fenced `<email>/` home. At `staging/` they have `cr` only (drop files, no modify after). DC takes over with `rwcd` at staging and files to `issued/` via the WORM `cr` grant. Same shape on the inbound side via `incoming/` → `received/` (WORM).
+Each handoff drops `project_team`'s modify rights for the slot they pushed from. At `working/` they have `cr` plus `rwcda` inside the `<party>/` folder they create (auto-owned but **unfenced** — `working/` is a shared team space, so peers keep their `cr` there). At `staging/` they have `cr` only (drop files, no modify after). DC takes over with `rwcd` at staging and files to `issued/` via the WORM `cr` grant. Same shape on the inbound side via `incoming/` → `received/` (WORM).
 
 Pick a role per persona:
 
-- `document_controller` — per-party records custodian; files into WORM `received/issued`, manages the `working/staging/reviewing` lifecycle, QCs the counterparty's drops in `incoming/`. **NOT a subtree-admin** anywhere — authority comes purely from cascade grants (the role-level `rwcda` written by `auto_own_roles` at each party, plus explicit `rwcd` at `incoming/` and `staging/`). They cannot bypass WORM (only worm-create via the list) or reach inside fenced working homes.
-- `project_team` — day-to-day contributor. Reads across the project; ratchets through the in-flight slots. Owns their `archive/<party>/working/<email>/` home via auto-own with a fenced `.zddc` (`inherit: false`).
+- `document_controller` — per-party records custodian; files into WORM `received/issued`, manages the `working/staging/reviewing` lifecycle, QCs the counterparty's drops in `incoming/`. **NOT a subtree-admin** anywhere — authority comes purely from cascade grants (the role-level `rwcda` written by `auto_own_roles` at each party, plus explicit `rwcd` at `incoming/` and `staging/`). They cannot bypass WORM (only worm-create via the list).
+- `project_team` — day-to-day contributor. Reads across the project; ratchets through the in-flight slots. Auto-owns (`rwcda`) the `working/<party>/` folder they create; it is **unfenced**, so `working/` stays a shared team space (every `project_team` member keeps cascade `cr` there). A per-directory `auto_own_fenced` opt-in (not set in the default tree) would make it private.
 - `observer` — pure read-only across the project. No auto-own home (the role itself has no `c` anywhere). Intended for auditors, regulators, and external read-only viewers who must not contribute content.
 
 **Roles overlap on purpose.** DCs are typically internal employees and ARE in `project_team` (often defined as `*@example.com`). The cascade is "deepest level that has any matching principal wins for that level, with within-level UNION of all matched principals". To prevent a `project_team: cr` grant at the slot from shadowing a DC's role-level `rwcda` inherited from the party folder, the embedded defaults RESTATE `document_controller: rwcda` at every slot that has a project_team-specific grant (`working/`, `staging/`, `reviewing/`). Within-level union → DC gets `rwcda` ∪ `cr` = `rwcda`. Operators adding new slot-level project_team grants in their own `.zddc` files should follow the same pattern. (Internal `observer` users matched by the project_team wildcard would still be lifted to `cr` by the union — observer is intended for EXTERNAL auditors whose emails don't match the wildcard. Deployments with internal observers should use explicit project_team membership instead of a wildcard.)
@@ -544,7 +544,7 @@ Pick a role per persona:
 - `roles: { <name>: { members: [...], reset: <bool>? } }` — members union across the cascade unless `reset: true`.
 - `admins: [<email>, ...]` — root only; sudo-style elevation per request.
 - `auto_own: <bool>` — when true, ensure.go writes a `.zddc` granting the creator's email `rwcda` on first mkdir.
-- `auto_own_fenced: <bool>` — adds `inherit: false` to the auto-own `.zddc` (private-by-default home). No effect without `auto_own: true`.
+- `auto_own_fenced: <bool>` — adds `inherit: false` to the auto-own `.zddc`, making the directory private to its creator (ancestor grants don't cascade in). **Opt-in — not set anywhere in the default tree**, so the default working/staging/incoming/reviewing party homes are unfenced/shared. No effect without `auto_own: true`.
 - `auto_own_roles: [<role>, ...]` — additional role names that get `rwcda` in the auto-own `.zddc`, alongside the creator's email. Lets the schema express role-level peer authority without `admins:` (which would be subtree-admin and bypass WORM/fences via elevation).
 - `title:` — read only from the per-project `.zddc`; surfaces on the landing-page picker.
 

ARCHITECTURE.md

@@ -544,7 +544,7 @@ none of them is load-bearing alone.
 |---|---|---|
 | Authentication | Establish caller identity (email) | Two paths: `Authorization: Bearer <token>` validated against `<ZDDC_ROOT>/.zddc.d/tokens/<sha256-hex>` (CLI / scripted callers); or `X-Auth-Request-Email` injected by an upstream auth proxy (browser users). Token system is built-in and self-issuing — no external IDP required |
 | Policy decider | Yield an allow/deny verdict for (identity, path, chain) | Pluggable via `ZDDC_OPA_URL`: in-process Go evaluator (default) or external OPA-compatible HTTP/socket endpoint. `zddc/internal/policy/` |
-| ACL cascade | The default decider's rule set | Per-directory `.zddc` YAML with verb-set permissions (`r`/`w`/`c`/`d`/`a`) and roles, plus a baked-in default tree bottom layer (`zddc-server show-defaults`) that uses a recursive `paths:` tree to describe subfolder rules even before those folders exist. Walked deepest-first first-match-wins (`zddc/internal/zddc/cascade.go`, `walker.go`, `acl.go`). External OPA can replace this rule set with arbitrary Rego (the bundled `access_federal.rego` is the parent-deny-is-absolute / NIST AC-6 variant) while keeping the same `.zddc` files as input data |
+| ACL cascade | The default decider's rule set | Per-directory `.zddc` YAML with verb-set permissions (`r`/`w`/`c`/`d`/`a`) and roles, plus a baked-in default tree bottom layer (`zddc-server show-defaults`) that uses a recursive `paths:` tree to describe subfolder rules even before those folders exist. Walked deepest-first first-match-wins (`zddc/internal/zddc/cascade.go`, `walker.go`, `acl.go`). External OPA can replace this rule set with arbitrary Rego the operator writes (e.g. ancestor-deny-absolute for NIST AC-6) while keeping the same `.zddc` files as input data; zddc-server ships only a fail-closed read-ACL skeleton (`--print-rego`) as a starting point |
 | Canonical-folder behaviour | Codify the bilateral exchange-record archetype | All driven by `.zddc` keys (baked into the embedded default tree): `auto_own:` / `auto_own_fenced:` — mkdir here writes a creator-owned `.zddc` (`<email>: rwcda`; fenced adds `acl.inherit:false`); `worm: [principal…]` — write-once-read-many (`w`/`d`/`a` stripped for everyone non-admin, `c` survives only for the listed principals; admins exempt); `virtual:` — never materialise on disk; `drop_target:` — browse shows a drag-drop upload overlay. The defaults put `auto_own` on `working`/`staging`/`archive-party`/`incoming` and `worm: [document_controller]` on `archive/<party>/{received,issued}`, so the canonical convention is unchanged — but an operator can reshape it (rename `received`/`issued`, mark any path WORM, …) without a code change. `zddc/internal/zddc/lookups.go`, `worm.go`, `roles.go`; the embedded default tree |
 | Tool-rooted view | Make the caller's accessible subtree feel like their entire world (UX containment) | Archive auto-served at every directory; the URL it's served at *is* its root. No breadcrumb leads above |
 | URL canonicalization | Resolve URL paths to on-disk casing before any layer below sees them | `zddc/internal/fs/resolve.go ResolveCanonical` — case-insensitive lookup with lowercase-wins tiebreak when sibling case variants exist on disk. File and folder names preserve case on disk; the canonicalization is purely URL→FS-name mapping. Virtual prefixes (`.archive`, `.profile`, `.tokens`) flow through verbatim |
@@ -700,7 +700,7 @@ whether to deploy the system should know which column they're in.
 | Cryptography | Go stdlib defaults | FIPS 140-3 validated module (microsoft/go or RHEL FIPS) |
 | TLS | Go stdlib defaults | Explicit MinVersion ≥ TLS 1.2, DoD-approved cipher allowlist, OCSP stapling, HSTS |
 | Access model | Per-verb (`r`/`w`/`c`/`d`/`a`) with first-class roles and an admin escape hatch — closes NIST AC-3(7) | (closed by default; external Rego still available for org-specific policy via `ZDDC_OPA_URL`) |
-| Subtree authority | In-process decider: leaf grants override ancestor denies (delegation primitive). Federal posture: deploy OPA with `access_federal.rego` for ancestor-deny-absolute / NIST AC-6 | (closed; federal posture is the OPA path) |
+| Subtree authority | In-process decider: leaf grants override ancestor denies (delegation primitive). Federal posture: deploy OPA with the operator's own ancestor-deny-absolute Rego (NIST AC-6) | (closed; federal posture is the OPA path) |
 | Audit log integrity | Local lumberjack rotation, filesystem-trusted | Tamper-evident (signed chain or external append-only sink), 1y online + 3y archive |
 | Information disclosure | Anonymous reaches `/` and `/.profile` (project picker, public-projects names) | All endpoints behind authenticated proxy; no anonymous discovery |
 | Apps URL fetches | Fetch-once-cached, no integrity check | SHA-256 pin + signature verification |
@@ -723,7 +723,7 @@ Five permission verbs gate every read and write:
 
 `.zddc` files express grants under `acl.permissions: { principal → verb-set }`. A principal containing `@` is an email pattern matched by `MatchesPattern` (existing glob); a bare name is a role looked up against `roles:` definitions, walking the cascade for the closest definition. Empty verb set is an explicit deny.
 
-Cascade evaluation walks leaf→root for the first level whose entries match the user; the union of matching verb sets at that level wins. A leaf allow overrides an ancestor explicit-deny — that's the load-bearing delegation primitive that lets a subtree owner grant access without root-admin involvement. Operators who need the opposite rule (ancestor-deny-absolute, NIST AC-6) deploy OPA with the bundled `access_federal.rego`.
+Cascade evaluation walks leaf→root for the first level whose entries match the user; the union of matching verb sets at that level wins. A leaf allow overrides an ancestor explicit-deny — that's the load-bearing delegation primitive that lets a subtree owner grant access without root-admin involvement. Operators who need the opposite rule (ancestor-deny-absolute, NIST AC-6) deploy OPA with their own Rego (zddc-server ships only the fail-closed read-ACL skeleton at `--print-rego`).
 
 The `admins:` field (root or any subtree `.zddc`) confers admin authority over that level and below, but it splits into two powers — see the elevation section below:
 - **Standing config-edit (no elevation):** an admin — or anyone with the `a` verb — may edit the `.zddc`/roles of subtrees they administer. `IsConfigEditor` grants `VerbA` above the WORM clamp; it owns the subtree's policy but cannot write/delete records.

CLAUDE.md

@@ -65,8 +65,11 @@ npm test                             # all Playwright specs (build first!)
 npx playwright test <tool>           # one spec
 ./dev-server start  # stop           # cache-busting HTTP on :8000
 
-# zddc/ Go server (sub-project)
-(cd zddc && go test ./...)           # unit tests (Go 1.24+)
+# zddc/ Go server (sub-project). Go is NOT on the host — run go test/build
+# through the localhost/zddc-go:1.24 container (canonical wrapper, with the
+# GOPROXY/GOPRIVATE env it needs, in AGENTS.md § Test). The bare command
+# below fails on the host.
+(cd zddc && go test ./...)           # unit tests (Go 1.24+) — via the podman wrapper, not host
 ```
 
 No lint/typecheck/format commands exist for the HTML tools — vanilla JS + POSIX sh by design.

classifier/build.sh

@@ -51,9 +51,15 @@ concat_files \
   "js/utils.js" \
   "../shared/zddc-filter.js" \
   "js/store.js" \
+  "js/persist.js" \
+  "js/classify.js" \
+  "js/workspace.js" \
+  "js/dnd.js" \
   "js/validator.js" \
   "js/scanner.js" \
   "js/tree.js" \
+  "js/target-tree.js" \
+  "js/copy.js" \
   "js/spreadsheet.js" \
   "js/selection.js" \
   "js/preview.js" \

classifier/css/layout.css

@@ -175,34 +175,46 @@
     background-color: var(--bg-hover);
 }
 
-/* Counts read "direct+total". The direct number stays solid (immediate info);
-   the "+total" subtree count is muted and pulses while its subtree is still
-   being scanned, then goes solid once final. */
+/* Counts read "direct+total". Completed numbers are blue — var(--primary),
+   which is theme-aware (medium blue in light, lighter blue in dark). The
+   direct number is always completed (known the moment the folder is read).
+   The "+total" subtree count stays muted grey + pulses while still scanning,
+   then turns blue once final. Once the row is fully scanned (both numbers
+   blue) the folders/files labels turn blue too (.folder-count.done). */
+.folder-count .ct-direct,
 .folder-count .ct-total {
-    color: var(--text-secondary, #6b7280);
+    color: var(--primary);
 }
 .folder-count .ct-total.pending {
     color: var(--text-muted, #9aa0a6);
     font-style: italic;
     animation: scan-pulse 1.2s ease-in-out infinite;
 }
+.folder-count.done .ct-label {
+    color: var(--primary);
+}
 @keyframes scan-pulse {
     0%, 100% { opacity: 0.55; }
     50%      { opacity: 1; }
 }
 
-/* Live scan status line under the tree-pane header. */
-.scan-status {
-    padding: 0.25rem 0.6rem;
+/* Page footer — hosts the live scan status. */
+.app-footer {
+    flex-shrink: 0;
+    display: flex;
+    align-items: center;
+    padding: 0.2rem 0.75rem;
+    border-top: 1px solid var(--border, #e2e2e2);
+    background: var(--bg-secondary, #f5f5f5);
     font-size: 0.75rem;
     color: var(--text-muted, #8a8a8a);
-    border-bottom: 1px solid var(--border, #e2e2e2);
+    min-height: 1.4em;
+}
+.scan-status {
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
-    min-height: 1.1em;
 }
-.scan-status:empty { display: none; }
 .scan-status.scanning { color: var(--primary, #2868c8); }
 
 .folder-item.selected {
@@ -253,6 +265,242 @@
     margin-left: 1.5rem;
 }
 
+/* ── Welcome screen (intro + tutorial) ─────────────────────────────────── */
+.empty-state--overlay { overflow-y: auto; }
+.welcome { max-width: 900px; padding: 1.5rem 0.5rem 2.5rem; }
+.welcome__title { font-size: 2.6rem; line-height: 1.1; margin: 0 0 0.6rem; }
+.welcome__lede {
+    font-size: 1.2rem; line-height: 1.55; color: var(--text);
+    margin: 0 auto 2rem; max-width: 62ch;
+}
+.welcome__methods {
+    display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
+    margin: 1.75rem 0 0; text-align: left;
+}
+@media (max-width: 780px) { .welcome__methods { grid-template-columns: 1fr; } }
+.method {
+    border: 1px solid var(--border); border-radius: var(--radius);
+    padding: 1rem 1.15rem; background: var(--bg);
+}
+.method--primary { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
+.method__title { font-size: 1.1rem; margin: 0 0 0.5rem; }
+.method__tag {
+    display: inline-block; font-size: 0.68rem; font-weight: 700;
+    text-transform: uppercase; letter-spacing: 0.04em; color: var(--primary);
+    margin-left: 0.4rem; vertical-align: middle;
+}
+.method__tag--warn { color: var(--warning); }
+.method__what { font-size: 0.95rem; color: var(--text-muted); margin: 0 0 0.7rem; }
+.method__steps { margin: 0; padding-left: 1.25rem; font-size: 0.95rem; line-height: 1.6; }
+.method__steps li { margin: 0.35rem 0; }
+.method__steps code {
+    background: var(--bg-secondary); padding: 0.05rem 0.35rem;
+    border-radius: 4px; font-size: 0.85em;
+}
+.welcome__note { font-size: 0.9rem; color: var(--text-muted); margin-top: 1.5rem; }
+
+/* ── Workspaces (welcome manager) ──────────────────────────────────────── */
+.workspaces { text-align: left; margin: 1.5rem 0 0.5rem; }
+.ws-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
+.ws-head h2 { margin: 0; font-size: 1.4rem; }
+.ws-list { display: flex; flex-direction: column; gap: 0.4rem; }
+.ws-empty { color: var(--text-muted); font-size: 0.85rem; padding: 0.75rem; border: 1px dashed var(--border); border-radius: var(--radius); }
+.ws-row {
+    display: flex; align-items: center; gap: 0.75rem;
+    padding: 0.6rem 0.75rem; border: 1px solid var(--border); border-radius: var(--radius);
+    background: var(--bg);
+}
+.ws-row__main { flex: 1; min-width: 0; }
+.ws-row__name { font-weight: 600; }
+.ws-row__meta { font-size: 0.78rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.ws-row__actions { display: flex; gap: 0.3rem; flex-shrink: 0; }
+.ws-or { font-size: 0.82rem; color: var(--text-muted); margin: 1rem 0 0.5rem; }
+
+/* ── Workflow mode switch (header) ─────────────────────────────────────── */
+.mode-switch {
+    display: inline-flex;
+    margin-left: 0.5rem;
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    overflow: hidden;
+}
+.mode-btn {
+    border: none;
+    background: var(--bg);
+    color: var(--text-muted);
+    padding: 0.3rem 0.7rem;
+    font-size: 0.8rem;
+    cursor: pointer;
+}
+.mode-btn + .mode-btn { border-left: 1px solid var(--border); }
+.mode-btn.active {
+    background: var(--primary);
+    color: var(--bg);
+    font-weight: 600;
+}
+
+/* ── Target pane (Classify & Copy) ─────────────────────────────────────── */
+.target-pane {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+.target-pane[hidden], .spreadsheet-pane[hidden] { display: none; }
+
+.target-tabs { display: flex; gap: 0.25rem; }
+.target-tab {
+    border: 1px solid var(--border);
+    border-bottom: none;
+    background: var(--bg-secondary);
+    color: var(--text-muted);
+    padding: 0.3rem 0.8rem;
+    font-size: 0.85rem;
+    border-radius: var(--radius) var(--radius) 0 0;
+    cursor: pointer;
+}
+.target-tab.active {
+    background: var(--bg);
+    color: var(--primary);
+    font-weight: 600;
+}
+
+.target-body { flex: 1; overflow: hidden; }
+.target-panel { height: 100%; display: flex; flex-direction: column; }
+.target-panel[hidden] { display: none; }
+.target-panel__toolbar {
+    display: flex;
+    align-items: center;
+    gap: 0.75rem;
+    padding: 0.5rem 0.75rem;
+    border-bottom: 1px solid var(--border);
+    flex-wrap: wrap;
+}
+.target-hint { font-size: 0.75rem; color: var(--text-muted); }
+
+.target-tree { flex: 1; overflow: auto; padding: 0.5rem 0.75rem; }
+.target-empty { color: var(--text-muted); font-size: 0.85rem; padding: 1rem 0.25rem; }
+
+/* tree nodes */
+.tnode { margin: 0.1rem 0; }
+.tnode__children { margin-left: 1.25rem; border-left: 1px dashed var(--border); padding-left: 0.5rem; }
+.tnode__row {
+    display: flex;
+    align-items: center;
+    gap: 0.4rem;
+    padding: 0.2rem 0.3rem;
+    border-radius: var(--radius);
+}
+.tnode__row:hover { background: var(--bg-hover); }
+.tnode__toggle {
+    border: none; background: none; cursor: pointer;
+    color: var(--text-muted); width: 1.1em; font-size: 0.8rem; padding: 0;
+}
+.tnode__icon { font-size: 0.85rem; }
+.tnode__name { flex: 0 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.tnode--leaf > .tnode__row > .tnode__name { color: var(--primary); font-weight: 600; }
+.tnode--party > .tnode__row > .tnode__name { font-weight: 700; }
+.tnode--bin > .tnode__row > .tnode__name { color: var(--primary); }
+.tnode__badge {
+    background: var(--primary); color: var(--bg);
+    border-radius: 999px; padding: 0 0.4rem; font-size: 0.7rem; font-weight: 600;
+}
+/* Node CRUD controls sit to the right of the level name, revealed on hover. */
+.tnode__actions { display: inline-flex; gap: 0.1rem; margin-left: 0.3rem; flex: 0 0 auto; opacity: 0; transition: opacity 0.12s; }
+.tnode__row:hover .tnode__actions, .tslot__row:hover .tnode__actions { opacity: 1; }
+.tnode__act {
+    border: 1px solid var(--border); background: var(--bg);
+    border-radius: var(--radius); cursor: pointer;
+    font-size: 0.72rem; padding: 0.05rem 0.35rem; color: var(--text);
+}
+.tnode__act:hover { background: var(--bg-hover); }
+
+/* placed files under a node */
+.tnode__files { margin: 0.1rem 0 0.2rem 1.6rem; }
+.tfile { display: flex; align-items: baseline; gap: 0.4rem; font-size: 0.75rem; padding: 0.05rem 0; }
+.tfile__orig { color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 14rem; }
+.tfile__arrow { color: var(--text-muted); }
+.tfile__name { color: var(--text); }
+.tfile--err .tfile__name { color: var(--danger); }
+.tfile--err::before { content: "⚠"; color: var(--danger); }
+
+/* transmittal slots + bin form */
+.tslot { margin: 0.15rem 0 0.15rem 1.1rem; }
+.tslot__row { display: flex; align-items: center; gap: 0.5rem; padding: 0.15rem 0.3rem; }
+.tslot__name { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
+.tnode--bin { margin-left: 1.1rem; }
+.binform {
+    display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center;
+    margin: 0.2rem 0 0.3rem 1.1rem; padding: 0.4rem; background: var(--bg-secondary);
+    border: 1px solid var(--border); border-radius: var(--radius);
+}
+.binform input, .binform select {
+    font-size: 0.78rem; padding: 0.2rem 0.3rem;
+    border: 1px solid var(--border); border-radius: var(--radius);
+    background: var(--bg); color: var(--text);
+}
+.binform__seq { width: 7rem; }
+.binform__title { width: 11rem; }
+
+/* drop-target affordance */
+.tnode__row.drop-hover, .tslot.drop-hover { outline: 2px dashed var(--primary); outline-offset: -2px; background: var(--primary-light); }
+
+/* ── Source-tree file rows (classify mode) ─────────────────────────────── */
+.file-item {
+    display: flex;
+    align-items: center;
+    gap: 0.4rem;
+    padding: 0.15rem 0.5rem;
+    cursor: grab;
+    border-radius: var(--radius);
+    font-size: 0.85rem;
+    user-select: none;
+}
+.file-item:hover { background: var(--bg-hover); }
+.file-item:active { cursor: grabbing; }
+.file-item.match-highlight { background: var(--primary-light); outline: 1px solid var(--primary); }
+.folder-item[draggable="true"] { cursor: grab; }
+.file-icon { color: var(--text-muted); }
+.file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+
+/* classification state dot */
+.cl-dot {
+    width: 0.55rem; height: 0.55rem; border-radius: 999px; flex-shrink: 0;
+    border: 1px solid var(--border); background: transparent;
+}
+.cl-dot--none        { background: transparent; }
+.cl-dot--tracking,
+.cl-dot--transmittal { background: var(--warning); border-color: var(--warning); }
+.cl-dot--partial     { background: var(--warning); border-color: var(--warning); }
+.cl-dot--done        { background: var(--success); border-color: var(--success); }
+.cl-dot--excluded    { background: var(--text-muted); border-color: var(--text-muted); opacity: 0.6; }
+.file-item.excluded .file-name { text-decoration: line-through; color: var(--text-muted); }
+
+/* placed-file row in the target pane is clickable (reveal in source) */
+.tfile { cursor: pointer; }
+.tfile:hover .tfile__name { text-decoration: underline; }
+
+/* cross-tree reveal flash */
+.reveal-flash, .match-highlight { animation: cl-flash 1.5s ease-out; }
+@keyframes cl-flash {
+    0%, 40% { background: var(--primary-light); outline: 2px solid var(--primary); outline-offset: -2px; }
+    100% { background: transparent; outline-color: transparent; }
+}
+
+/* exclude/include context menu */
+.cl-menu {
+    position: fixed; z-index: 9500;
+    background: var(--bg); border: 1px solid var(--border);
+    border-radius: var(--radius); box-shadow: 0 6px 18px rgba(0,0,0,0.18);
+    padding: 0.25rem; min-width: 11rem;
+}
+.cl-menu__item {
+    display: block; width: 100%; text-align: left;
+    border: none; background: none; color: var(--text);
+    padding: 0.4rem 0.6rem; font-size: 0.83rem; cursor: pointer; border-radius: var(--radius);
+}
+.cl-menu__item:hover { background: var(--bg-hover); }
+
 /* Spreadsheet Pane */
 .spreadsheet-pane {
     flex: 1;

classifier/js/app.js

@@ -33,6 +33,9 @@
         cacheDOMElements();
         setupEventListeners();
 
+        // Workspace manager (renders the welcome list, owns new/open/autosave).
+        if (app.modules.workspace) app.modules.workspace.init();
+
         // Browser-compatibility branch:
         //   HTTP mode (served by zddc-server) — works everywhere; the
         //     HTTP polyfill stands in for the FS Access API. Auto-load
@@ -139,7 +142,10 @@
             exportHashesBtn: document.getElementById('exportHashesBtn'),
             sha256Checkbox: document.getElementById('sha256Checkbox'),
             hideCompliantCheckbox: document.getElementById('hideCompliantCheckbox'),
-            
+            hideCompliantLabel: document.getElementById('hideCompliantLabel'),
+            hideAssignedCheckbox: document.getElementById('hideAssignedCheckbox'),
+            hideAssignedLabel: document.getElementById('hideAssignedLabel'),
+
             // Folder tree
             folderTree: document.getElementById('folderTree'),
             folderTreePane: document.getElementById('folderTreePane'),
@@ -158,10 +164,41 @@
             errorFiles: document.getElementById('errorFiles'),
             
             // Preview
-            togglePreviewBtn: document.getElementById('togglePreviewBtn')
+            togglePreviewBtn: document.getElementById('togglePreviewBtn'),
+
+            // Mode switch + Classify & Copy panes
+            modeRenameBtn: document.getElementById('modeRenameBtn'),
+            modeClassifyBtn: document.getElementById('modeClassifyBtn'),
+            spreadsheetPane: document.getElementById('spreadsheetPane'),
+            targetPane: document.getElementById('targetPane'),
+            copyOutputBtn: document.getElementById('copyOutputBtn')
         };
     }
 
+    /**
+     * Switch between "Rename" (in-place grid) and "Classify & Copy" (map files
+     * onto target trees, copy renamed copies out). The source tree (left) stays
+     * in both modes; only the right pane swaps.
+     */
+    function setMode(mode) {
+        const classify = mode === 'classify';
+        app.dom.modeRenameBtn.classList.toggle('active', !classify);
+        app.dom.modeClassifyBtn.classList.toggle('active', classify);
+        if (app.dom.spreadsheetPane) app.dom.spreadsheetPane.hidden = classify;
+        if (app.dom.targetPane) app.dom.targetPane.hidden = !classify;
+        // Mode-specific source-tree filters: "Hide Compliant" is for the rename
+        // grid; "Hide Assigned" is for the classify workflow.
+        if (app.dom.hideCompliantLabel) app.dom.hideCompliantLabel.hidden = classify;
+        if (app.dom.hideAssignedLabel) app.dom.hideAssignedLabel.hidden = !classify;
+        app.modules.classify.setEnabled(classify);
+        if (classify && app.modules.targetTree) {
+            app.modules.targetTree.init();
+            app.modules.targetTree.render();
+        }
+        // Re-render the source tree so its per-file markers appear/disappear.
+        if (app.modules.tree) app.modules.tree.render();
+    }
+
     /**
      * Set up event listeners
      */
@@ -185,15 +222,38 @@
         
         // Hide compliant toggle
         app.dom.hideCompliantCheckbox.addEventListener('change', handleHideCompliantToggle);
-        
+
+        // Hide assigned toggle (classify mode — filters the source tree)
+        if (app.dom.hideAssignedCheckbox) {
+            app.dom.hideAssignedCheckbox.addEventListener('change', function () {
+                if (app.modules.tree && app.modules.tree.setHideAssigned) {
+                    app.modules.tree.setHideAssigned(this.checked);
+                }
+            });
+        }
+
         // Collapse tree button
         app.dom.collapseTreeBtn.addEventListener('click', handleCollapseTree);
+
+        // Workflow mode switch
+        if (app.dom.modeRenameBtn) app.dom.modeRenameBtn.addEventListener('click', function () { setMode('rename'); });
+        if (app.dom.modeClassifyBtn) app.dom.modeClassifyBtn.addEventListener('click', function () { setMode('classify'); });
+        if (app.dom.copyOutputBtn) app.dom.copyOutputBtn.addEventListener('click', function () { app.modules.copy.run(); });
         
         // Keyboard shortcuts
         document.addEventListener('keydown', handleKeyDown);
         
         // Resize handle
         setupResizeHandle();
+
+        // Re-render the source tree when classify state changes (so file dots
+        // and placements stay in sync after a drop). Cheap no-op outside
+        // classify mode.
+        if (app.modules.classify) {
+            app.modules.classify.on(function () {
+                if (app.modules.classify.isEnabled() && app.modules.tree) app.modules.tree.render();
+            });
+        }
     }
     
     /**
@@ -310,27 +370,35 @@
     /**
      * Open a directory handle and initialize the application
      */
-    async function openDirectory(dirHandle) {
-        app.rootHandle = dirHandle;
-        
-        // Hide welcome screen and show main UI
+    // Show the main UI and initialize the per-tool modules ONCE. Shared by the
+    // legacy rename open and the workspace open/new flows (the latter scan or
+    // load a snapshot themselves).
+    var shellInited = false;
+    function enterAppShell() {
         hideWelcomeScreen();
         showMainUI();
-        
-        // Initialize modules BEFORE scanning (so they're ready for store updates)
-        app.modules.spreadsheet.init();  // Subscribe to store
-        app.modules.selection.init();
-        app.modules.preview.init();  // After selection so it can listen for rowfocused
-        app.modules.resize.init();
-        app.modules.filter.init();
-        app.modules.sort.init();
-        app.modules.tree.setupKeyboardShortcuts();
-        
+        if (!shellInited) {
+            shellInited = true;
+            app.modules.spreadsheet.init();  // Subscribe to store
+            app.modules.selection.init();
+            app.modules.preview.init();      // After selection so it can listen for rowfocused
+            app.modules.resize.init();
+            app.modules.filter.init();
+            app.modules.sort.init();
+            app.modules.tree.setupKeyboardShortcuts();
+            if (app.modules.targetTree) app.modules.targetTree.init();
+        }
+        if (app.dom.refreshHeaderBtn) app.dom.refreshHeaderBtn.classList.remove('hidden');
+    }
+
+    async function openDirectory(dirHandle) {
+        app.rootHandle = dirHandle;
+        enterAppShell();
+        // Default to Classify & Copy (the primary workflow). The user can switch
+        // to "Rename in place" via the toggle for the spreadsheet.
+        setMode('classify');
         // Now scan directory (this will trigger store updates and renders)
         await app.modules.scanner.scanDirectory(dirHandle);
-        
-        // Show refresh button now that a directory is loaded
-        if (app.dom.refreshHeaderBtn) { app.dom.refreshHeaderBtn.classList.remove('hidden'); }
     }
 
     /**
@@ -343,17 +411,33 @@
         }
 
         try {
+            // A snapshot-loaded workspace handle needs its read permission
+            // re-granted before we can enumerate it again.
+            if (app.modules.persist && app.modules.persist.verifyPermission) {
+                const ok = await app.modules.persist.verifyPermission(app.rootHandle, false);
+                if (!ok) {
+                    if (window.zddc) window.zddc.toast('Permission to read the source directory was denied.', 'error');
+                    return;
+                }
+            }
+
             // Clear current data
             app.folderTree = [];
             app.selectedFolders.clear();
             app.lastSelectedFolderPath = null;
-            
+
             // Reset store
             app.modules.store.reset();
 
             // Rescan directory (modules already initialized, just rescan)
             await app.modules.scanner.scanDirectory(app.rootHandle);
 
+            // For a workspace, persist the refreshed snapshot (additive: the
+            // path-keyed map re-attaches; new files appear unassigned).
+            if (app.modules.workspace && app.modules.workspace.onRescanned) {
+                app.modules.workspace.onRescanned();
+            }
+
         } catch (err) {
             console.error('Error refreshing directory:', err);
             alert('Error refreshing directory: ' + err.message);
@@ -489,7 +573,9 @@
 
     // Export functions for use by other modules
     app.modules.app = {
-        updateStats
+        updateStats,
+        setMode,
+        enterAppShell
     };
 
     // Initialize when DOM is ready

classifier/js/classify.js

@@ -0,0 +1,519 @@
+/**
+ * ZDDC Classifier — "Classify & Copy" state model.
+ *
+ * The non-destructive workflow: the source directory is read-only; the user
+ * maps each source file onto two orthogonal target trees, and a later copy
+ * step writes renamed copies into a separate output directory.
+ *
+ *   - Tracking tab (→ filename), POSITIONAL:
+ *       tracking number   = the file's ancestor folder names joined with '-'
+ *       revision (+status) = its immediate parent folder, named "REV (STATUS)"
+ *       title             = derived from the original filename
+ *     → TRACKING_REV (STATUS) - TITLE.ext
+ *   - Transmittal tab (→ output path):
+ *       <party>/{issued,received}/<YYYY-MM-DD_TN (STATUS) - TITLE>/
+ *
+ * This module is the single source of truth: placements live in `assignments`
+ * keyed by source-relative path (so they survive a re-pick); the trees define
+ * structure only. All target values are DERIVED, never stored.
+ */
+(function () {
+    'use strict';
+
+    // ── unique ids ───────────────────────────────────────────────────────────
+    var _idSeq = 0;
+    function uid() {
+        if (window.crypto && typeof window.crypto.randomUUID === 'function') {
+            try { return window.crypto.randomUUID(); } catch (_) { /* non-secure ctx */ }
+        }
+        return 'n' + (Date.now().toString(36)) + '-' + (++_idSeq).toString(36);
+    }
+
+    // ── state ────────────────────────────────────────────────────────────────
+    var state = {
+        enabled: false,           // classify mode on/off
+        assignments: {},          // srcKey -> { trackingNodeId, transmittalNodeId, excluded, titleOverride }
+        trackingTree: [],         // [ { id, name, children:[] } ]   (leaf = no children)
+        transmittalTree: [],      // [ { id, kind:'party', name, children:[ slot ] } ]
+        outputName: null,         // remembered output directory display name
+    };
+
+    // id -> { node, kind:'tracking'|'party'|'slot'|'transmittal', parent }
+    var nodeIndex = {};
+
+    // ── pub/sub ──────────────────────────────────────────────────────────────
+    var listeners = [];
+    function on(cb) { listeners.push(cb); return function () { listeners = listeners.filter(function (f) { return f !== cb; }); }; }
+    var notifyScheduled = false;
+    function notify() {
+        // Coalesce bursts (a group-drop touches many keys) into one render.
+        // Listeners include the target/source re-renders AND the workspace
+        // autosave (workspace.js subscribes) — persistence is not this
+        // module's concern.
+        if (notifyScheduled) return;
+        notifyScheduled = true;
+        Promise.resolve().then(function () {
+            notifyScheduled = false;
+            for (var i = 0; i < listeners.length; i++) {
+                try { listeners[i](); } catch (e) { console.error('classify listener', e); }
+            }
+        });
+    }
+
+    // ── source keys + title derivation ───────────────────────────────────────
+    function stripRoot(p) {
+        var i = (p || '').indexOf('/');
+        return i < 0 ? '' : p.slice(i + 1);
+    }
+    // Stable key for a file: its path relative to the picked root (root segment
+    // dropped), so re-picking the same directory re-attaches the same map.
+    function srcKeyForFile(file) {
+        var rel = stripRoot(file.folderPath || '');
+        var fn = zddc.joinExtension(file.originalFilename, file.extension);
+        return rel ? rel + '/' + fn : fn;
+    }
+    // Default title: if the original name already parses as ZDDC, reuse its
+    // title; otherwise the cleaned stem (originalFilename is the stem already).
+    function defaultTitle(file) {
+        var full = zddc.joinExtension(file.originalFilename, file.extension);
+        var parsed = zddc.parseFilename(full);
+        if (parsed && parsed.valid && parsed.title) return parsed.title;
+        return (file.originalFilename || '').trim();
+    }
+
+    // Parse a leaf folder label "A (IFR)" → { revision, status }. No parens →
+    // the whole label is the revision and status is blank.
+    var LEAF_RE = /^(.*?)\s*\(([^)]+)\)\s*$/;
+    function parseLeafLabel(name) {
+        var m = (name || '').match(LEAF_RE);
+        if (m) return { revision: m[1].trim(), status: m[2].trim() };
+        return { revision: (name || '').trim(), status: '' };
+    }
+
+    // ── assignments ──────────────────────────────────────────────────────────
+    function assignmentFor(key) {
+        var a = state.assignments[key];
+        if (!a) {
+            a = { trackingNodeId: null, transmittalNodeId: null, excluded: false, titleOverride: null };
+            state.assignments[key] = a;
+        }
+        return a;
+    }
+    // Read-only: returns the existing entry or null (no side effects).
+    function getAssignment(key) { return state.assignments[key] || null; }
+    function cleanAssignment(key) {
+        var a = state.assignments[key];
+        if (a && !a.trackingNodeId && !a.transmittalNodeId && !a.excluded && !a.titleOverride) {
+            delete state.assignments[key];
+        }
+    }
+
+    // Place keys onto a node along one axis ('tracking' | 'transmittal').
+    // nodeId null clears that axis.
+    function place(keys, nodeId, axis) {
+        var field = axis === 'transmittal' ? 'transmittalNodeId' : 'trackingNodeId';
+        keys.forEach(function (k) {
+            var a = assignmentFor(k);
+            a[field] = nodeId || null;
+            a.excluded = false;          // placing un-excludes
+            cleanAssignment(k);
+        });
+        notify();
+    }
+    function setExcluded(keys, excluded) {
+        keys.forEach(function (k) {
+            var a = assignmentFor(k);
+            a.excluded = !!excluded;
+            if (excluded) { a.trackingNodeId = null; a.transmittalNodeId = null; }
+            cleanAssignment(k);
+        });
+        notify();
+    }
+    function setTitleOverride(key, title) {
+        var a = assignmentFor(key);
+        a.titleOverride = title && title.trim() ? title.trim() : null;
+        cleanAssignment(key);
+        notify();
+    }
+
+    // ── node index ───────────────────────────────────────────────────────────
+    function rebuildIndex() {
+        nodeIndex = {};
+        (function walkTracking(nodes, parent) {
+            (nodes || []).forEach(function (n) {
+                nodeIndex[n.id] = { node: n, kind: 'tracking', parent: parent };
+                walkTracking(n.children, n);
+            });
+        })(state.trackingTree, null);
+        (state.transmittalTree || []).forEach(function (party) {
+            nodeIndex[party.id] = { node: party, kind: 'party', parent: null };
+            (party.children || []).forEach(function (slot) {
+                nodeIndex[slot.id] = { node: slot, kind: 'slot', parent: party };
+                (slot.children || []).forEach(function (bin) {
+                    nodeIndex[bin.id] = { node: bin, kind: 'transmittal', parent: slot };
+                });
+            });
+        });
+    }
+    function getNode(id) { return nodeIndex[id] ? nodeIndex[id].node : null; }
+    function infoFor(id) { return nodeIndex[id] || null; }
+
+    // Ancestor name chain for a tracking node (root → node inclusive).
+    function trackingChain(info) {
+        var names = [];
+        var cur = info;
+        while (cur && cur.kind === 'tracking') {
+            names.unshift(cur.node.name);
+            cur = cur.parent ? infoFor(cur.parent.id) : null;
+        }
+        return names;
+    }
+
+    // ── tracking tree ops ────────────────────────────────────────────────────
+    function addTrackingNode(parentId, name) {
+        var node = { id: uid(), name: (name || 'new').trim() || 'new', children: [] };
+        if (parentId) {
+            var info = infoFor(parentId);
+            if (!info || info.kind !== 'tracking') return null;
+            info.node.children.push(node);
+        } else {
+            state.trackingTree.push(node);
+        }
+        rebuildIndex();
+        notify();
+        return node.id;
+    }
+
+    // ── transmittal tree ops ─────────────────────────────────────────────────
+    function addParty(name) {
+        var party = { id: uid(), kind: 'party', name: (name || 'Party').trim() || 'Party', children: [] };
+        state.transmittalTree.push(party);
+        rebuildIndex();
+        notify();
+        return party.id;
+    }
+    function ensureSlot(party, slot) {
+        var existing = (party.children || []).filter(function (s) { return s.slot === slot; })[0];
+        if (existing) return existing;
+        var node = { id: uid(), kind: 'slot', slot: slot, name: slot, children: [] };
+        party.children.push(node);
+        return node;
+    }
+    // Create a transmittal bin. meta = { date, type:'TRN'|'SUB', seq, status?, title? }.
+    // The folder name follows the folder grammar; party node name doubles as the
+    // transmittal-number prefix (so its tracking is "<party>-<type>-<seq>").
+    function addTransmittalBin(partyId, slot, meta) {
+        var info = infoFor(partyId);
+        if (!info || info.kind !== 'party') return null;
+        var slotNode = ensureSlot(info.node, slot);
+        var bin = { id: uid(), kind: 'transmittal', name: transmittalFolderName(info.node.name, meta), meta: meta };
+        slotNode.children.push(bin);
+        rebuildIndex();
+        notify();
+        return bin.id;
+    }
+    function transmittalFolderName(partyName, meta) {
+        var tn = [partyName, meta.type, meta.seq].filter(Boolean).join('-');
+        var status = meta.status && zddc.isValidStatus(meta.status) ? meta.status : '---';
+        var title = (meta.title && meta.title.trim()) || (meta.type === 'SUB' ? 'Submittal' : 'Transmittal');
+        return zddc.formatFolder({ date: meta.date, trackingNumber: tn, status: status, title: title });
+    }
+
+    // ── shared node ops ──────────────────────────────────────────────────────
+    function renameNode(id, name) {
+        var info = infoFor(id);
+        if (!info) return;
+        if (info.kind === 'slot') return; // slots are fixed
+        info.node.name = (name || '').trim() || info.node.name;
+        if (info.kind === 'party') {
+            // Party rename re-derives child transmittal folder names (prefix).
+            (info.node.children || []).forEach(function (slot) {
+                (slot.children || []).forEach(function (bin) {
+                    bin.name = transmittalFolderName(info.node.name, bin.meta);
+                });
+            });
+        }
+        rebuildIndex();
+        notify();
+    }
+    // Delete a node (and descendants). Any placement referencing a removed node
+    // is cleared so no file points at a ghost.
+    function deleteNode(id) {
+        var info = infoFor(id);
+        if (!info) return;
+        var removed = {};
+        (function collect(n) {
+            removed[n.id] = true;
+            (n.children || []).forEach(collect);
+        })(info.node);
+
+        if (info.kind === 'tracking') {
+            removeFrom(info.parent ? info.parent.children : state.trackingTree, id);
+        } else if (info.kind === 'party') {
+            removeFrom(state.transmittalTree, id);
+        } else if (info.kind === 'transmittal') {
+            removeFrom(info.parent.children, id);   // info.parent is the slot node
+        }
+        // Clear dangling placements.
+        Object.keys(state.assignments).forEach(function (k) {
+            var a = state.assignments[k];
+            if (a.trackingNodeId && removed[a.trackingNodeId]) a.trackingNodeId = null;
+            if (a.transmittalNodeId && removed[a.transmittalNodeId]) a.transmittalNodeId = null;
+            cleanAssignment(k);
+        });
+        rebuildIndex();
+        notify();
+    }
+    function removeFrom(arr, id) {
+        for (var i = 0; i < arr.length; i++) { if (arr[i].id === id) { arr.splice(i, 1); return; } }
+    }
+
+    // ── derive target ────────────────────────────────────────────────────────
+    // Compute the full target for a file from its placements. Pure; returns
+    // { tracking, revision, status, title, extension, filename, outPath,
+    //   party, slot, transmittalFolder, complete, excluded, errors:[] }.
+    function deriveTarget(file) {
+        var key = srcKeyForFile(file);
+        var a = state.assignments[key] || {};
+        var out = {
+            key: key,
+            tracking: '', revision: '', status: '',
+            title: (a.titleOverride && a.titleOverride.trim()) || defaultTitle(file),
+            extension: file.extension || '',
+            filename: '', outPath: '',
+            party: '', slot: '', transmittalFolder: '',
+            trackingLeaf: false, excluded: !!a.excluded, errors: [],
+        };
+        if (out.excluded) return out;
+
+        // Axis 1 — tracking.
+        if (a.trackingNodeId) {
+            var ti = infoFor(a.trackingNodeId);
+            if (ti && ti.kind === 'tracking') {
+                var chain = trackingChain(ti);             // [root … node]
+                out.tracking = chain.slice(0, -1).join('-'); // ancestors only
+                var leaf = parseLeafLabel(ti.node.name);
+                out.revision = leaf.revision;
+                out.status = leaf.status;
+                out.trackingLeaf = (ti.node.children || []).length === 0;
+                if (!out.tracking) out.errors.push('tracking number is empty — the file needs at least one ancestor folder');
+                if (out.status && !zddc.isValidStatus(out.status)) out.errors.push('unknown status "' + out.status + '"');
+                if (!out.status) out.errors.push('parent folder has no "(STATUS)" — name it like "A (IFR)"');
+                if (!out.trackingLeaf) out.errors.push('not in a leaf folder yet');
+            }
+        } else {
+            out.errors.push('no tracking number assigned');
+        }
+
+        // Axis 2 — transmittal → output path.
+        if (a.transmittalNodeId) {
+            var xi = infoFor(a.transmittalNodeId);
+            if (xi && xi.kind === 'transmittal') {
+                // bin → slot → party (nodeIndex stores parent as a NODE)
+                var slotInfo = xi.parent ? infoFor(xi.parent.id) : null;
+                out.slot = slotInfo ? slotInfo.node.slot : '';
+                out.party = slotInfo && slotInfo.parent ? slotInfo.parent.name : '';
+                out.transmittalFolder = xi.node.name;
+                if (out.party && out.slot && out.transmittalFolder) {
+                    out.outPath = out.party + '/' + out.slot + '/' + out.transmittalFolder;
+                }
+            }
+        } else {
+            out.errors.push('not placed in a transmittal');
+        }
+
+        out.filename = zddc.formatFilename({
+            trackingNumber: out.tracking, revision: out.revision,
+            status: out.status, title: out.title, extension: out.extension,
+        });
+        if (!out.filename && out.errors.length === 0) out.errors.push('incomplete name');
+        out.complete = !!(out.filename && out.outPath && out.errors.length === 0);
+        return out;
+    }
+
+    // Files currently placed in a node (reverse lookup over all source files).
+    function filesInNode(nodeId, axis, allFiles) {
+        var field = axis === 'transmittal' ? 'transmittalNodeId' : 'trackingNodeId';
+        return (allFiles || []).filter(function (f) {
+            var a = state.assignments[srcKeyForFile(f)];
+            return a && a[field] === nodeId;
+        });
+    }
+
+    // Per-file classification state for the left-tree markers.
+    //   'excluded' | 'done' | 'tracking' | 'transmittal' | 'partial' | 'none'
+    function fileState(file) {
+        var a = state.assignments[srcKeyForFile(file)];
+        if (!a) return 'none';
+        if (a.excluded) return 'excluded';
+        var t = !!a.trackingNodeId, x = !!a.transmittalNodeId;
+        if (t && x) {
+            var d = deriveTarget(file);
+            return d.complete ? 'done' : 'partial';
+        }
+        if (t) return 'tracking';
+        if (x) return 'transmittal';
+        return 'none';
+    }
+
+    function stats(allFiles) {
+        var s = { total: 0, excluded: 0, none: 0, partial: 0, done: 0 };
+        (allFiles || []).forEach(function (f) {
+            s.total++;
+            var st = fileState(f);
+            if (st === 'excluded') s.excluded++;
+            else if (st === 'done') s.done++;
+            else if (st === 'none') s.none++;
+            else s.partial++;   // tracking | transmittal | partial
+        });
+        return s;
+    }
+
+    // ── serialize / load ─────────────────────────────────────────────────────
+    function serialize() {
+        return {
+            assignments: state.assignments,
+            trackingTree: state.trackingTree,
+            transmittalTree: state.transmittalTree,
+            outputName: state.outputName,
+        };
+    }
+    function load(obj) {
+        if (!obj) return;
+        state.assignments = obj.assignments || {};
+        state.trackingTree = obj.trackingTree || [];
+        state.transmittalTree = obj.transmittalTree || [];
+        state.outputName = obj.outputName || null;
+        rebuildIndex();
+        notify();
+    }
+    function reset() {
+        state.assignments = {}; state.trackingTree = []; state.transmittalTree = [];
+        state.outputName = null;
+        rebuildIndex();
+        notify();
+    }
+
+    // ── add-folder pattern expansion ─────────────────────────────────────────
+    // Brace expansion for the add-folder box. Supports (non-nested) groups:
+    //   {a,b,c}      → alternation: a | b | c
+    //   {0001-0002}  → numeric range, zero-padded to the operands' width
+    //   {0001-0002,0005} → mix ranges and literals in one group
+    // Multiple groups expand as a cartesian product, e.g.
+    //   "X-{PM,EL}-{0001-0002,0005}_A (IFR)" → 6 names.
+    // A pattern with no braces returns itself (one name). Unbalanced braces are
+    // treated literally so the user never silently loses input.
+    function expandGroup(body) {
+        var out = [];
+        String(body).split(',').forEach(function (piece) {
+            var m = /^\s*(\d+)\s*-\s*(\d+)\s*$/.exec(piece);
+            if (m) {
+                var a = m[1], b = m[2];
+                var start = parseInt(a, 10), end = parseInt(b, 10);
+                // Pad when either operand carries a leading zero (e.g. 0001).
+                var width = (a.length > 1 && a[0] === '0') || (b.length > 1 && b[0] === '0')
+                    ? Math.max(a.length, b.length) : 0;
+                var step = start <= end ? 1 : -1;
+                for (var v = start; step > 0 ? v <= end : v >= end; v += step) {
+                    out.push(width ? String(v).padStart(width, '0') : String(v));
+                }
+            } else {
+                out.push(piece);
+            }
+        });
+        return out;
+    }
+    function expandFolderPattern(pattern) {
+        var s = String(pattern == null ? '' : pattern);
+        var parts = [];                 // each: {lit} or {opts:[...]}
+        var i = 0;
+        while (i < s.length) {
+            var open = s.indexOf('{', i);
+            if (open === -1) { parts.push({ lit: s.slice(i) }); break; }
+            var close = s.indexOf('}', open);
+            if (close === -1) { parts.push({ lit: s.slice(i) }); break; } // unbalanced → literal
+            if (open > i) parts.push({ lit: s.slice(i, open) });
+            parts.push({ opts: expandGroup(s.slice(open + 1, close)) });
+            i = close + 1;
+        }
+        var results = [''];
+        parts.forEach(function (p) {
+            var opts = p.lit != null ? [p.lit] : p.opts;
+            var next = [];
+            results.forEach(function (prefix) {
+                opts.forEach(function (o) { next.push(prefix + o); });
+            });
+            results = next;
+        });
+        // Trim + drop empties so a stray comma can't create a blank folder.
+        return results.map(function (r) { return r.trim(); }).filter(Boolean);
+    }
+
+    // Parse one (already brace-expanded) folder name into the nested tracking
+    // levels it represents: split on "-" into tracking-number segments, then
+    // split the FINAL segment once on "_" to separate the last tracking segment
+    // from the "REV (STATUS)" leaf. So "CPO-0001_0 (IFU)" → ["CPO","0001","0 (IFU)"]
+    // and "BMB-187023-PM-MOM-0001_A (IFR)" → ["BMB","187023","PM","MOM","0001","A (IFR)"].
+    // A name with no "-"/"_" is a single level (e.g. adding a leaf "A (IFR)").
+    function parseFolderLevels(name) {
+        var s = String(name == null ? '' : name).trim();
+        if (!s) return [];
+        var segs = s.split('-');
+        var last = segs.pop();
+        var u = last.indexOf('_');
+        if (u >= 0) { segs.push(last.slice(0, u)); segs.push(last.slice(u + 1)); }
+        else { segs.push(last); }
+        return segs.map(function (x) { return x.trim(); }).filter(Boolean);
+    }
+    // Children array for a tracking node (or the roots for null), or null.
+    function trackingChildren(parentId) {
+        if (!parentId) return state.trackingTree;
+        var info = infoFor(parentId);
+        return (info && info.kind === 'tracking') ? info.node.children : null;
+    }
+    // Ensure a nested chain of tracking folders exists under parentId, reusing
+    // an existing child when one already has that name (so sibling leaves share
+    // ancestors). Returns the leaf node id.
+    function addTrackingPath(parentId, segments) {
+        var cur = parentId || null;
+        (segments || []).forEach(function (seg) {
+            var name = (seg || '').trim();
+            if (!name) return;
+            var kids = trackingChildren(cur) || [];
+            var existing = kids.filter(function (n) { return n.name === name; })[0];
+            cur = existing ? existing.id : addTrackingNode(cur, name);
+        });
+        return cur;
+    }
+
+    // ── mode ─────────────────────────────────────────────────────────────────
+    function setEnabled(on) { state.enabled = !!on; notify(); }
+    function isEnabled() { return state.enabled; }
+
+    window.app.modules.classify = {
+        // mode
+        setEnabled: setEnabled, isEnabled: isEnabled,
+        // pub/sub
+        on: on,
+        // keys/title
+        srcKeyForFile: srcKeyForFile, defaultTitle: defaultTitle,
+        // assignments
+        assignmentFor: assignmentFor, getAssignment: getAssignment,
+        place: place, setExcluded: setExcluded,
+        setTitleOverride: setTitleOverride,
+        // trees
+        addTrackingNode: addTrackingNode, addParty: addParty,
+        addTransmittalBin: addTransmittalBin, renameNode: renameNode, deleteNode: deleteNode,
+        expandFolderPattern: expandFolderPattern,
+        parseFolderLevels: parseFolderLevels, addTrackingPath: addTrackingPath,
+        getNode: getNode, getTrackingTree: function () { return state.trackingTree; },
+        getTransmittalTree: function () { return state.transmittalTree; },
+        // derive + reverse
+        deriveTarget: deriveTarget, filesInNode: filesInNode,
+        fileState: fileState, stats: stats,
+        // persistence
+        serialize: serialize, load: load, reset: reset,
+        getOutputName: function () { return state.outputName; },
+        setOutputName: function (n) { state.outputName = n || null; notify(); },
+    };
+})();

classifier/js/copy.js

@@ -0,0 +1,199 @@
+/**
+ * ZDDC Classifier — copy-out (Classify & Copy mode).
+ *
+ * Copies the fully-classified source files into a SEPARATE output directory
+ * under their canonical ZDDC names and folder layout
+ *   <party>/{received,issued}/<DATE_TN (STATUS) - TITLE>/<TRACKING_REV (STATUS) - TITLE.ext>
+ * The source is never modified — every operation is a read (getFile) on the
+ * source and a write into the chosen output handle.
+ *
+ * Duplicate detection:
+ *   - two sources → the same output path  = mapping conflict (skipped + reported)
+ *   - target already exists, identical bytes (sha256) = skipped
+ *   - target exists, different bytes       = left untouched + reported (no clobber)
+ *
+ * Built on the generic FS-Access shape (getDirectoryHandle/getFileHandle/
+ * createWritable), so it works against a real handle today and a server-backed
+ * output handle later without changing this logic.
+ */
+(function () {
+    'use strict';
+
+    var outputHandle = null;     // remembered for the session
+
+    function C() { return window.app.modules.classify; }
+
+    function collectFiles() {
+        var out = [];
+        (function walk(nodes) {
+            (nodes || []).forEach(function (n) {
+                (n.files || []).forEach(function (f) { out.push(f); });
+                walk(n.children);
+            });
+        })(window.app.folderTree || []);
+        return out;
+    }
+
+    // Files that are ready to copy: complete target, not excluded.
+    function plan() {
+        var c = C(), items = [];
+        collectFiles().forEach(function (f) {
+            var d = c.deriveTarget(f);
+            if (d.excluded || !d.complete) return;
+            items.push({ file: f, d: d, outRel: d.outPath + '/' + d.filename });
+        });
+        return items;
+    }
+
+    // Group by output path; >1 source for a path = a mapping conflict.
+    function conflictsIn(items) {
+        var by = {}, conflicts = [];
+        items.forEach(function (p) { (by[p.outRel] = by[p.outRel] || []).push(p); });
+        Object.keys(by).forEach(function (k) { if (by[k].length > 1) conflicts.push(k); });
+        return { by: by, conflicts: conflicts };
+    }
+
+    function toast(msg, level) {
+        if (window.zddc && window.zddc.toast) window.zddc.toast(msg, level);
+    }
+    function setStatus(text) {
+        var el = document.getElementById('scanStatus');
+        if (!el) return;
+        el.textContent = text;
+        el.classList.toggle('scanning', !!text);
+    }
+
+    async function chooseOutput() {
+        if (!window.showDirectoryPicker) {
+            toast('Copying to an output directory needs the File System Access API (use Chromium, or run via zddc-server).', 'error');
+            return null;
+        }
+        try {
+            var h = await window.showDirectoryPicker({ mode: 'readwrite', id: 'zddc-classifier-output' });
+            outputHandle = h;
+            C().setOutputName(h.name);
+            return h;
+        } catch (e) {
+            if (e.name !== 'AbortError') toast('Could not open the output directory — ' + (e.message || e), 'error');
+            return null;
+        }
+    }
+
+    async function ensureDir(root, relPath) {
+        var parts = relPath.split('/').filter(Boolean);
+        var cur = root;
+        for (var i = 0; i < parts.length; i++) {
+            cur = await cur.getDirectoryHandle(parts[i], { create: true });
+        }
+        return cur;
+    }
+
+    async function sameContent(existingHandle, srcFileObj) {
+        var ef = await existingHandle.getFile();
+        var sf = await (await srcHandle(srcFileObj)).getFile();
+        if (ef.size !== sf.size) return false;
+        var a = await window.zddc.crypto.sha256File(ef);
+        var b = await window.zddc.crypto.sha256File(sf);
+        return a === b;
+    }
+
+    // Resolve a source file's live handle. Fresh-scan files already carry one;
+    // snapshot-loaded files resolve lazily from the workspace root by path.
+    async function srcHandle(fileObj) {
+        if (fileObj.handle) return fileObj.handle;
+        if (!window.app.rootHandle) throw new Error('source directory not connected');
+        return window.app.modules.scanner.resolveFileHandle(window.app.rootHandle, fileObj);
+    }
+
+    // Copy one file. Returns 'copied' | 'skipped' (identical) | 'differ' (left alone).
+    async function copyOne(out, p) {
+        var dir = await ensureDir(out, p.d.outPath);
+        var existing = null;
+        try { existing = await dir.getFileHandle(p.d.filename); } catch (e) { /* NotFound → fresh copy */ }
+        if (existing) {
+            return (await sameContent(existing, p.file)) ? 'skipped' : 'differ';
+        }
+        var srcFile = await (await srcHandle(p.file)).getFile();   // READ source (never write it)
+        var fh = await dir.getFileHandle(p.d.filename, { create: true });
+        var w = await fh.createWritable();
+        await w.write(srcFile);
+        await w.close();
+        return 'copied';
+    }
+
+    async function run() {
+        if (!C().isEnabled()) return;
+        var items = plan();
+        if (!items.length) {
+            toast('Nothing to copy yet — no files are fully classified (need both a tracking leaf and a transmittal).', 'warning');
+            return;
+        }
+        var cf = conflictsIn(items);
+        var blocked = {};
+        cf.conflicts.forEach(function (path) { blocked[path] = true; });
+        var todo = items.filter(function (p) { return !blocked[p.outRel]; });
+
+        if (cf.conflicts.length) {
+            toast(cf.conflicts.length + ' output-name collision(s) — two source files map to the same name. Skipped:\n'
+                + cf.conflicts.join('\n'), 'error');
+        }
+        if (!todo.length) return;
+
+        // Snapshot-loaded files have no live handle — re-grant read on the
+        // workspace source directory (one click) before copying.
+        if (todo.some(function (p) { return !p.file.handle; })) {
+            if (!window.app.rootHandle) {
+                toast('The source directory isn’t connected. Re-open the workspace to reconnect it.', 'error');
+                return;
+            }
+            var srcOk = await window.app.modules.persist.verifyPermission(window.app.rootHandle, false);
+            if (!srcOk) { toast('Permission to read the source directory was denied.', 'error'); return; }
+        }
+
+        var out = outputHandle || await chooseOutput();
+        if (!out) return;
+        if (!confirm('Copy ' + todo.length + ' file(s) into "' + out.name + '"?\n\nThe source directory is not modified.')) return;
+
+        var s = await copyTo(out, todo);
+
+        var msg = 'Copy complete — ' + s.copied + ' copied, ' + s.skipped + ' identical skipped'
+            + (s.differ ? (', ' + s.differ + ' already exist with different content (left untouched)') : '')
+            + (s.errors ? (', ' + s.errors + ' errors') : '') + '.';
+        toast(msg, (s.errors || s.differ) ? 'warning' : 'success');
+        if (s.differing.length) toast('Existing-but-different (not overwritten):\n' + s.differing.join('\n'), 'warning');
+        return s;
+    }
+
+    // Run the copy loop over a ready list against an output handle. No picker,
+    // no confirm — that's run()'s job; this is the engine (and the test seam).
+    async function copyTo(out, todo) {
+        var s = { copied: 0, skipped: 0, differ: 0, errors: 0, differing: [] };
+        for (var i = 0; i < todo.length; i++) {
+            setStatus('Copying… ' + (i + 1) + '/' + todo.length + ' — ' + todo[i].d.filename);
+            try {
+                var r = await copyOne(out, todo[i]);
+                s[r]++;
+                if (r === 'differ') s.differing.push(todo[i].outRel);
+            } catch (e) {
+                s.errors++;
+                if (window.zddc && window.zddc.toast) {
+                    window.zddc.toast('Failed to copy ' + todo[i].outRel + ' — ' + (e.message || e), 'error');
+                }
+            }
+        }
+        setStatus('');
+        return s;
+    }
+
+    function readyCount() { return plan().length; }
+
+    window.app.modules.copy = {
+        run: run,
+        readyCount: readyCount,
+        chooseOutput: chooseOutput,
+        // test/advanced seams
+        plan: plan,
+        conflictsIn: conflictsIn,
+        copyTo: copyTo,
+    };
+})();

classifier/js/dnd.js

@@ -0,0 +1,28 @@
+/**
+ * ZDDC Classifier — drag payload bus for Classify & Copy.
+ *
+ * HTML5 dataTransfer can't be read during `dragover` (only on `drop`), and we
+ * need the dragged set to drive drop-target highlighting. So the source keys
+ * live in a module variable for the lifetime of a drag; dataTransfer carries a
+ * marker so the browser shows a copy cursor and external drops are ignored.
+ */
+(function () {
+    'use strict';
+
+    var keys = [];
+
+    function setDrag(srcKeys, e) {
+        keys = (srcKeys || []).slice();
+        if (e && e.dataTransfer) {
+            e.dataTransfer.effectAllowed = 'copy';
+            try { e.dataTransfer.setData('application/x-zddc-keys', keys.join('\n')); } catch (_) { /* ok */ }
+        }
+    }
+    function getDrag() { return keys; }
+    function active() { return keys.length > 0; }
+    function clearDrag() { keys = []; }
+
+    window.app.modules.dnd = {
+        setDrag: setDrag, getDrag: getDrag, active: active, clearDrag: clearDrag,
+    };
+})();

classifier/js/persist.js

@@ -0,0 +1,128 @@
+/**
+ * ZDDC Classifier — workspace persistence (IndexedDB).
+ *
+ * A "workspace" is one classification project: the picked source directory
+ * HANDLE, a SNAPSHOT of its completed scan (folder/file structure — names and
+ * paths only, no contents), and the Classify & Copy map (assignments + target
+ * trees). Scan once, resume instantly across sessions without re-walking the
+ * (often cloud-backed, high-latency) source.
+ *
+ * Two object stores so the welcome list stays cheap:
+ *   - 'index' (tiny):  { id, name, rootName, createdAt, updatedAt, summary }
+ *   - 'data'  (large): { id, rootHandle, tree, classify }
+ *
+ * A FileSystemDirectoryHandle is structured-cloneable, so IndexedDB can hold
+ * it; on reuse we re-request permission (one click). It's only needed at COPY
+ * time — opening a workspace runs entirely from the snapshot.
+ */
+(function () {
+    'use strict';
+
+    var DB_NAME = 'zddc-classifier';
+    var DB_VERSION = 2;
+    var IDX = 'index';
+    var DATA = 'data';
+
+    var available = typeof indexedDB !== 'undefined';
+
+    function openDB() {
+        return new Promise(function (resolve, reject) {
+            if (!available) { reject(new Error('IndexedDB unavailable')); return; }
+            var req = indexedDB.open(DB_NAME, DB_VERSION);
+            req.onupgradeneeded = function () {
+                var db = req.result;
+                // 'kv' (v1, single implicit map) is intentionally left behind.
+                if (!db.objectStoreNames.contains(IDX)) db.createObjectStore(IDX, { keyPath: 'id' });
+                if (!db.objectStoreNames.contains(DATA)) db.createObjectStore(DATA, { keyPath: 'id' });
+            };
+            req.onsuccess = function () { resolve(req.result); };
+            req.onerror = function () { reject(req.error); };
+        });
+    }
+
+    function reqP(req) {
+        return new Promise(function (resolve, reject) {
+            req.onsuccess = function () { resolve(req.result); };
+            req.onerror = function () { reject(req.error); };
+        });
+    }
+
+    // ── public API ─────────────────────────────────────────────────────────
+
+    // Light metadata for every workspace (for the welcome list). Sorted newest
+    // first. Never loads the big snapshot.
+    function listWorkspaces() {
+        return openDB().then(function (db) {
+            return reqP(db.transaction(IDX, 'readonly').objectStore(IDX).getAll());
+        }).then(function (rows) {
+            (rows || []).sort(function (a, b) { return (b.updatedAt || 0) - (a.updatedAt || 0); });
+            return rows || [];
+        }).catch(function (e) { console.warn('persist.list', e); return []; });
+    }
+
+    // Full data record for one workspace: { id, rootHandle, tree, classify }.
+    function getWorkspace(id) {
+        return openDB().then(function (db) {
+            return reqP(db.transaction(DATA, 'readonly').objectStore(DATA).get(id));
+        }).catch(function (e) { console.warn('persist.get', e); return null; });
+    }
+
+    // Save (create or update). meta = {id,name,rootName,createdAt,updatedAt,summary};
+    // data = {id, rootHandle, tree, classify}. tree may be omitted on a classify-
+    // only autosave (the snapshot rarely changes) — then we preserve the stored one.
+    function putWorkspace(meta, data) {
+        return openDB().then(function (db) {
+            return new Promise(function (resolve, reject) {
+                var t = db.transaction([IDX, DATA], 'readwrite');
+                t.oncomplete = function () { resolve(); };
+                t.onerror = function () { reject(t.error); };
+                t.objectStore(IDX).put(meta);
+                var ds = t.objectStore(DATA);
+                if (data && typeof data.tree !== 'undefined') {
+                    ds.put(data);
+                } else if (data) {
+                    // Merge classify/rootHandle without clobbering the snapshot.
+                    var g = ds.get(meta.id);
+                    g.onsuccess = function () {
+                        var existing = g.result || { id: meta.id };
+                        if (typeof data.rootHandle !== 'undefined') existing.rootHandle = data.rootHandle;
+                        if (typeof data.classify !== 'undefined') existing.classify = data.classify;
+                        existing.id = meta.id;
+                        ds.put(existing);
+                    };
+                }
+            });
+        }).catch(function (e) { console.warn('persist.put', e); });
+    }
+
+    function deleteWorkspace(id) {
+        return openDB().then(function (db) {
+            return new Promise(function (resolve, reject) {
+                var t = db.transaction([IDX, DATA], 'readwrite');
+                t.oncomplete = function () { resolve(); };
+                t.onerror = function () { reject(t.error); };
+                t.objectStore(IDX).delete(id);
+                t.objectStore(DATA).delete(id);
+            });
+        }).catch(function (e) { console.warn('persist.delete', e); });
+    }
+
+    // Re-acquire read permission on a stored handle (one click). true if usable.
+    function verifyPermission(handle, write) {
+        if (!handle || typeof handle.queryPermission !== 'function') return Promise.resolve(false);
+        var opts = { mode: write ? 'readwrite' : 'read' };
+        return handle.queryPermission(opts).then(function (p) {
+            if (p === 'granted') return true;
+            return handle.requestPermission(opts).then(function (p2) { return p2 === 'granted'; });
+        }).catch(function () { return false; });
+    }
+
+    window.app.modules.persist = {
+        available: available,
+        listWorkspaces: listWorkspaces,
+        getWorkspace: getWorkspace,
+        putWorkspace: putWorkspace,
+        deleteWorkspace: deleteWorkspace,
+        verifyPermission: verifyPermission,
+    };
+})();

classifier/js/preview.js

@@ -521,7 +521,28 @@
     }
 
     // Export module
+    // Preview a file on demand (Classify & Copy mode). Snapshot-loaded files
+    // have no handle yet — resolve it from the workspace root (one-click read
+    // permission re-grant) before opening the preview window.
+    async function previewFile(file) {
+        try {
+            if (!file.handle && !file.isVirtual && window.app.rootHandle) {
+                if (window.app.modules.persist && window.app.modules.persist.verifyPermission) {
+                    const ok = await window.app.modules.persist.verifyPermission(window.app.rootHandle, false);
+                    if (!ok) { if (window.zddc) window.zddc.toast('Permission to read the source directory was denied.', 'error'); return; }
+                }
+                await window.app.modules.scanner.resolveFileHandle(window.app.rootHandle, file);
+            }
+            await openPreviewWindow(file);
+        } catch (e) {
+            if (window.zddc) {
+                window.zddc.toast('Couldn’t preview ' + (file.originalFilename || 'file') + ' — ' + (e.message || e), 'error');
+            }
+        }
+    }
+
     window.app.modules.preview = {
-        init
+        init,
+        previewFile
     };
 })();

classifier/js/scanner.js

@@ -16,6 +16,15 @@
     let scanGen = 0;                 // bumped per scan; stale workers bail
     let scanStats = null;            // { folders, files, current, done, startedAt }
     let renderTimer = null;          // throttle for progressive re-render
+    // How many directories to read in flight at once. The scan is I/O-bound —
+    // each readdir is a round-trip to the backing store (cloud-sync / network
+    // mounts like OneDrive or Samba have high per-op latency), so the lever is
+    // parallel in-flight reads, not CPU threads. This only helps the
+    // many-folders case; a single fat folder is enumerated one entry at a time
+    // by the File System Access API and can't be parallelized. Raise it if the
+    // store tolerates more concurrency; too high risks cloud-provider
+    // throttling.
+    var SCAN_CONCURRENCY = 32;
 
     function scheduleRender() {
         if (renderTimer) return;
@@ -32,18 +41,27 @@
         updateScanStatus();
     }
 
-    // Render the running scan status into the tree-pane header.
+    // elapsed since the scan started, e.g. "3.2s" or "1m 04s".
+    function elapsedStr() {
+        if (!scanStats) return '0s';
+        const ms = Date.now() - scanStats.startedAt;
+        if (ms < 60000) return (ms / 1000).toFixed(1) + 's';
+        const m = Math.floor(ms / 60000);
+        const s = Math.round((ms % 60000) / 1000);
+        return m + 'm ' + (s < 10 ? '0' : '') + s + 's';
+    }
+
+    // Render the running scan status (with live elapsed time) into the footer.
     function updateScanStatus() {
         const el = document.getElementById('scanStatus');
         if (!el || !scanStats) return;
         if (scanStats.done) {
-            const secs = ((Date.now() - scanStats.startedAt) / 1000).toFixed(1);
             el.textContent = 'Scanned ' + scanStats.folders + ' folders · '
-                + scanStats.files + ' files in ' + secs + 's';
+                + scanStats.files + ' files in ' + elapsedStr();
             el.classList.remove('scanning');
         } else {
             el.textContent = 'Scanning… ' + scanStats.folders + ' folders · '
-                + scanStats.files + ' files'
+                + scanStats.files + ' files · ' + elapsedStr()
                 + (scanStats.current ? ' — ' + scanStats.current : '');
             el.classList.add('scanning');
         }
@@ -91,14 +109,56 @@
         }
     }
 
-    // One-shot toast for scan errors (permission denied, network hiccups on a
-    // share). De-duped per path so a flaky folder doesn't spam.
+    // Translate a File System Access API error into accurate, actionable text.
+    // The browser's raw DOMException messages are cryptic and often read like a
+    // permission problem when they aren't — we key off err.name (reliable)
+    // rather than the message. Returns a plain-language explanation; the raw
+    // name + message are still appended by the caller for troubleshooting.
+    function describeFsError(err) {
+        var name = err && err.name ? err.name : '';
+        switch (name) {
+            case 'NotAllowedError':
+                return 'Permission to read this folder was denied or revoked. '
+                    + 'Re-pick the root folder to re-grant access.';
+            case 'InvalidStateError':
+                // The handle was read once, then the directory changed underneath
+                // it (common on a network/SMB share that's being written to, or
+                // after a disconnect/reconnect). NOT a permissions problem.
+                return 'The folder changed on disk since it was first read '
+                    + '(common on a busy or reconnecting network share). '
+                    + 'Rescan to pick up the current contents.';
+            case 'NotFoundError':
+                return 'The folder no longer exists — it may have been moved, '
+                    + 'renamed, or deleted since the scan started.';
+            case 'NotReadableError':
+                return 'The folder could not be read — the share may have '
+                    + 'disconnected, or the OS denied access.';
+            case 'SecurityError':
+                return 'The browser blocked access to this folder for security '
+                    + 'reasons.';
+            case 'TypeMismatchError':
+                return 'Expected a folder here but found a file (or vice-versa).';
+            case 'AbortError':
+                return 'Reading this folder was aborted.';
+            default:
+                return 'Could not read this folder.';
+        }
+    }
+
+    // One-shot toast for scan errors (permission denied, stale handles, network
+    // hiccups on a share). De-duped per path so a flaky folder doesn't spam.
     const scanErrorsSeen = new Set();
     function reportScanError(path, err) {
         console.error('Scan error:', path, err);
         if (scanErrorsSeen.has(path)) return;
         scanErrorsSeen.add(path);
-        const msg = 'Couldn’t scan ' + path + ': ' + (err && err.message ? err.message : err);
+        // Plain-language explanation, then the raw error in parentheses so the
+        // user can copy it (toasts are selectable) for deeper troubleshooting.
+        var raw = err && err.name
+            ? err.name + (err.message ? ': ' + err.message : '')
+            : (err && err.message ? err.message : String(err));
+        var msg = 'Couldn’t scan ' + path + ' — ' + describeFsError(err)
+            + '\n\n(' + raw + ')';
         if (window.zddc && typeof window.zddc.toast === 'function') {
             window.zddc.toast(msg, 'error');
         }
@@ -139,42 +199,70 @@
         }
         flushRender();
 
-        // Breadth-first by level behind a bounded worker pool: level 1, then
-        // level 2, … each rendered as it lands (top levels appear first).
-        // Deeper levels keep filling in; workers await between directories so
-        // the UI stays responsive on a slow/large network drive.
-        let level = [root];
-        while (level.length && myGen === scanGen) {
-            await runWithConcurrency(level, 6, function (n) { return scanNodeChildren(n, myGen); });
-            const next = [];
-            for (const n of level) {
-                for (const c of n.children) {
-                    if (preserveState && savedExpanded.has(c.path)) c.expanded = true;
-                    if (c.scanState === 'pending') next.push(c);
-                }
-            }
-            level = next;
+        // Tick the footer's elapsed time once a second even if no new folder
+        // landed (so a slow directory doesn't make the timer look frozen).
+        const ticker = setInterval(function () {
+            if (myGen !== scanGen || (scanStats && scanStats.done)) { clearInterval(ticker); return; }
+            updateScanStatus();
+        }, 1000);
+
+        // Continuous breadth-first walk: up to SCAN_CONCURRENCY directory reads
+        // in flight at once, pulling newly-discovered child dirs as they land
+        // (no per-level barrier, so the pool stays saturated). Top levels still
+        // appear first (FIFO). The cap is the lever — see SCAN_CONCURRENCY.
+        await drainQueue([root], myGen, SCAN_CONCURRENCY);
+        if (preserveState && savedExpanded.size) {
+            restoreExpandedPaths(window.app.folderTree, savedExpanded);
         }
+        clearInterval(ticker);
         if (myGen !== scanGen) return; // superseded by a newer scan
 
         scanStats.done = true;
         scanStats.current = '';
         flushRender();
+
+        // Completion toast with the totals + elapsed time.
+        if (window.zddc && typeof window.zddc.toast === 'function') {
+            window.zddc.toast(
+                'Scan complete — ' + scanStats.folders + ' folders, '
+                + scanStats.files + ' files in ' + elapsedStr() + '.',
+                'success');
+        }
     }
 
-    // Run fn over items with at most `limit` concurrent calls; resolves when
-    // all have settled. Termination is clean (no transient-empty-queue race).
-    async function runWithConcurrency(items, limit, fn) {
-        let i = 0;
-        async function runner() {
-            while (i < items.length) {
-                const idx = i++;
-                await fn(items[idx]);
+    // Continuous worker pool over a shared queue: keep up to `conc` directory
+    // reads in flight at once, pulling newly-discovered child dirs as they land
+    // — no per-level barrier, so workers never idle waiting on the slowest dir
+    // in a level. Roughly breadth-first (FIFO; a node's children are enqueued
+    // after it), so top levels still surface first. Resolves when the queue is
+    // drained and no read is in flight (clean termination, no empty-queue race).
+    function drainQueue(seed, myGen, conc) {
+        const queue = seed.slice();
+        let active = 0;
+        return new Promise(function (resolve) {
+            function finishIfIdle() {
+                if (queue.length === 0 && active === 0) resolve();
             }
-        }
-        const runners = [];
-        for (let k = 0; k < Math.min(limit, items.length); k++) runners.push(runner());
-        await Promise.all(runners);
+            function pump() {
+                while (myGen === scanGen && active < conc && queue.length) {
+                    const node = queue.shift();
+                    active++;
+                    Promise.resolve(scanNodeChildren(node, myGen)).then(function () {
+                        active--;
+                        if (myGen === scanGen) {
+                            const kids = node.children;
+                            for (let i = 0; i < kids.length; i++) {
+                                if (kids[i].scanState === 'pending') queue.push(kids[i]);
+                            }
+                        }
+                        pump();
+                        finishIfIdle();
+                    }, function () { active--; pump(); finishIfIdle(); });
+                }
+                finishIfIdle();
+            }
+            pump();
+        });
     }
 
     // Force a folder's subtree to scan NOW (jumped ahead of the background
@@ -182,16 +270,7 @@
     // shows complete contents. Idempotent + shares the live scan generation.
     async function ensureScanned(node) {
         if (!node || !node.handle || node.scanState === 'done') return;
-        const myGen = scanGen;
-        let level = [node];
-        while (level.length && myGen === scanGen) {
-            await runWithConcurrency(level, 6, function (n) { return scanNodeChildren(n, myGen); });
-            const next = [];
-            for (const n of level) {
-                for (const c of n.children) if (c.scanState === 'pending') next.push(c);
-            }
-            level = next;
-        }
+        await drainQueue([node], scanGen, SCAN_CONCURRENCY);
         flushRender();
     }
     
@@ -229,6 +308,8 @@
     // only a 'pending' node is scanned, so concurrent callers (background +
     // open-prioritised) don't double-scan.
     async function scanNodeChildren(node, myGen) {
+        // A .zip is a lazy node — read its contents only when opened.
+        if (node.scanState === 'zip-pending') { await scanZipNode(node); return; }
         if (node.scanState !== 'pending') return;
         node.scanState = 'scanning';
         if (scanStats) scanStats.current = node.path;
@@ -238,18 +319,19 @@
             for await (const entry of node.handle.values()) {
                 if (myGen !== scanGen) { node.scanState = 'pending'; return; } // cancelled
                 if (entry.kind === 'file') {
-                    const fo = await createFileObject(entry, node.handle);
-                    if (!fo) continue;
+                    const fo = createFileObject(entry, node.handle);
                     fo.folderPath = node.path;
                     files.push(fo);
                     if (scanStats) scanStats.files++;
                     if (fo.extension === 'zip' && typeof JSZip !== 'undefined') {
+                        // Don't read the archive during the listing — make an
+                        // expandable, lazy zip node scanned on open (scanZipNode).
                         const zipName = zddc.joinExtension(fo.originalFilename, fo.extension);
                         const zipPath = node.path + '/' + zipName;
                         const zh = { name: zipName, kind: 'directory', isZipRoot: true, zipPath: zipPath };
                         const zipNode = makeNode(zh, zipPath, node);
-                        try { await scanZipIntoNode(zipNode, fo); }
-                        catch (e) { reportScanError(zipPath, e); zipNode.scanState = 'done'; }
+                        zipNode._zipFileObj = fo;
+                        zipNode.scanState = 'zip-pending';
                         childDirs.push(zipNode);
                         if (scanStats) scanStats.folders++;
                     }
@@ -267,18 +349,15 @@
         node.fileCount = files.length;
         node.children = childDirs;
         node.subdirCount = childDirs.length;
-        // Roll this folder's own files/dirs (plus the full contents of any
-        // inline-zip children) into the running subtree totals of this node
-        // and every ancestor. Regular child dirs add their own share when they
-        // get scanned — that's how the total fills in progressively.
-        let addF = files.length;
-        let addD = childDirs.length;
-        for (const c of childDirs) {
-            if (c.scanState === 'done') { addF += c.runFiles; addD += c.runDirs; }
-        }
+        // Roll this folder's own files/dirs into the running subtree totals of
+        // this node + every ancestor. Real child dirs add their share when they
+        // get scanned; lazy zip nodes add theirs when opened (scanZipNode).
+        const addF = files.length;
+        const addD = childDirs.length;
         for (let a = node; a; a = a.parent) { a.runFiles += addF; a.runDirs += addD; }
-        // Zip children are scanned inline ('done'); real dirs are still pending.
-        node.pending = childDirs.filter(function (c) { return c.scanState !== 'done'; }).length;
+        // Only real unscanned dirs hold the parent open; zip-pending children
+        // are lazy, so they don't.
+        node.pending = childDirs.filter(function (c) { return c.scanState === 'pending'; }).length;
         if (node.pending === 0) {
             markDone(node);
         } else {
@@ -287,6 +366,30 @@
         scheduleRender();
     }
 
+    // Read a lazy zip node's contents on demand (when opened), building its
+    // child nodes and folding its internal totals into ancestors.
+    async function scanZipNode(node) {
+        if (node.scanState !== 'zip-pending' || !node._zipFileObj) return;
+        node.scanState = 'scanning';
+        scheduleRender();
+        try {
+            await scanZipIntoNode(node, node._zipFileObj); // builds children, runFiles/runDirs, sets 'done'
+        } catch (e) {
+            reportScanError(node.path, e);
+            node.scanState = 'done';
+            node.runFiles = 0;
+            node.runDirs = 0;
+        }
+        node._zipFileObj = null;
+        // The zip counted as 1 dir in its parent already; now fold in its
+        // internal files/dirs to every ancestor's running totals.
+        for (let a = node.parent; a; a = a.parent) {
+            a.runFiles += node.runFiles;
+            a.runDirs += node.runDirs;
+        }
+        scheduleRender();
+    }
+
     // Build a zip-root node's children from its archive contents (in memory),
     // marking the whole zip subtree 'done' immediately. Mirrors the on-disk
     // node shape so the rest of the app treats zip folders like real ones.
@@ -618,37 +721,159 @@
     /**
      * Create file object with metadata
      */
-    async function createFileObject(fileHandle, folderHandle) {
-        try {
-            const file = await fileHandle.getFile();
-            const split = zddc.splitExtension(file.name);
+    // Build a file row from JUST the directory entry — no getFile(). Listing a
+    // network share is already slow; the old code opened EVERY file to read
+    // size/lastModified (which the grid doesn't even display), turning a
+    // listing into one network round-trip per file. size/lastModified are now
+    // loaded on demand by preview / SHA / rename, which call getFile()
+    // themselves. The scan is now a pure directory listing.
+    function createFileObject(fileHandle, folderHandle) {
+        const split = zddc.splitExtension(fileHandle.name);
+        return {
+            handle: fileHandle,
+            folderHandle: folderHandle,
+            originalFilename: split.name,
+            extension: split.extension,
+            size: null,
+            lastModified: null,
+            // Editable fields
+            trackingNumber: '',
+            revision: '',
+            status: '',
+            title: '',
+            // State
+            isDirty: false,
+            error: false,
+            errorMessage: '',
+            validation: null,
+            sha256: null
+            // folderPath added by the caller.
+        };
+    }
 
-            return {
-                handle: fileHandle,
-                folderHandle: folderHandle,
-                originalFilename: split.name,
-                extension: split.extension,
-                size: file.size,
-                lastModified: file.lastModified,
-                
-                // Editable fields
-                trackingNumber: '',
-                revision: '',
-                status: '',
-                title: '',
-                
-                // State
-                isDirty: false,
-                error: false,
-                errorMessage: '',
-                validation: null,
-                sha256: null
-                // folderPath will be added later in buildTree
-            };
-        } catch (err) {
-            console.error('Error reading file:', fileHandle.name, err);
-            return null;
+    // ── Workspace snapshot (scan once, resume without re-walking the FS) ────
+
+    // Serialize the completed scan to compact JSON (short keys: large trees).
+    // Zip-root nodes are NOT preserved as expandable folders — the .zip stays a
+    // plain file in its parent (classifying inside archives is out of scope for
+    // a persisted workspace).
+    function snapshotTree() {
+        function serFile(f) { return { o: f.originalFilename, e: f.extension, p: f.folderPath }; }
+        function serNode(n) {
+            var o = { n: n.name, p: n.path };
+            if (n.files && n.files.length) o.f = n.files.map(serFile);
+            var realKids = (n.children || []).filter(function (c) { return !c.isZipRoot; });
+            if (realKids.length) o.c = realKids.map(serNode);
+            // Record scan progress so an interrupted scan can resume: 'children'
+            // = direct entries fully read (kids may still be pending); anything
+            // unfinished (pending/scanning/zip) → 'pending' to re-read. 'done'
+            // is the default and omitted.
+            var st = n.scanState;
+            if (st && st !== 'done') o.s = (st === 'children') ? 'children' : 'pending';
+            return o;
         }
+        return (window.app.folderTree || []).map(serNode);
+    }
+
+    // Rebuild window.app.folderTree from a snapshot — handle-less nodes, marked
+    // 'done', subtree totals recomputed. Handles are resolved lazily from the
+    // workspace root handle at copy/preview time.
+    function loadSnapshot(snap) {
+        function deFile(sf) {
+            return {
+                handle: null, folderHandle: null,
+                originalFilename: sf.o, extension: sf.e,
+                size: null, lastModified: null,
+                trackingNumber: '', revision: '', status: '', title: '',
+                isDirty: false, error: false, errorMessage: '', validation: null, sha256: null,
+                folderPath: sf.p,
+            };
+        }
+        function deNode(sn, parent) {
+            var node = makeNode({ name: sn.n, kind: 'directory' }, sn.p, parent);
+            node.handle = null;
+            node.scanState = sn.s || 'done';   // 'pending'/'children' resume on reconnect
+            node.expanded = false;
+            node.files = (sn.f || []).map(deFile);
+            node.children = (sn.c || []).map(function (c) { return deNode(c, node); });
+            node.fileCount = node.files.length;
+            node.subdirCount = node.children.length;
+            return node;
+        }
+        var roots = (snap || []).map(function (sn) { return deNode(sn, null); });
+        if (roots[0]) roots[0].expanded = true;
+        (function totals(nodes) {
+            nodes.forEach(function (n) {
+                totals(n.children);
+                var rf = n.files.length, rd = n.children.length;
+                n.children.forEach(function (c) { rf += c.runFiles; rd += c.runDirs; });
+                n.runFiles = rf; n.runDirs = rd;
+            });
+        })(roots);
+        window.app.folderTree = roots;
+        if (window.app.modules.store && window.app.modules.store.setFolderTree) {
+            window.app.modules.store.setFolderTree(roots);
+        }
+        return roots;
+    }
+
+    // ── Lazy handle resolution (snapshot files carry paths, not handles) ────
+    function relFromRoot(p) { var i = (p || '').indexOf('/'); return i < 0 ? '' : p.slice(i + 1); }
+    async function resolveDirHandle(rootHandle, relPath) {
+        var cur = rootHandle;
+        var parts = (relPath || '').split('/').filter(Boolean);
+        for (var i = 0; i < parts.length; i++) { cur = await cur.getDirectoryHandle(parts[i]); }
+        return cur;
+    }
+    // Resolve (and cache) a file object's handle from the workspace root.
+    async function resolveFileHandle(rootHandle, fileObj) {
+        if (fileObj.handle) return fileObj.handle;
+        var dir = await resolveDirHandle(rootHandle, relFromRoot(fileObj.folderPath));
+        var name = zddc.joinExtension(fileObj.originalFilename, fileObj.extension);
+        var h = await dir.getFileHandle(name);
+        fileObj.handle = h;
+        fileObj.folderHandle = dir;
+        return h;
+    }
+
+    // Resume an interrupted scan: walk the loaded tree for 'pending' folders,
+    // resolve their handles from the (reconnected) root, and drain only those —
+    // already-scanned folders are left alone. Returns true if work was done.
+    async function resumeScan(rootHandle) {
+        if (!rootHandle) return false;
+        var pend = [];
+        (function walk(ns) {
+            (ns || []).forEach(function (n) {
+                if (n.scanState === 'pending') pend.push(n);
+                else walk(n.children);
+            });
+        })(window.app.folderTree || []);
+        if (!pend.length) return false;
+
+        var myGen = ++scanGen;
+        zipCache.clear();
+        scanStats = { folders: 0, files: 0, current: '', done: false, startedAt: Date.now() };
+        var ticker = setInterval(function () {
+            if (myGen !== scanGen || (scanStats && scanStats.done)) { clearInterval(ticker); return; }
+            updateScanStatus();
+        }, 1000);
+
+        for (var i = 0; i < pend.length; i++) {
+            try { pend[i].handle = await resolveDirHandle(rootHandle, relFromRoot(pend[i].path)); }
+            catch (e) { pend[i].scanState = 'done'; reportScanError(pend[i].path, e); }
+        }
+        await drainQueue(pend.filter(function (n) { return n.handle; }), myGen, SCAN_CONCURRENCY);
+
+        clearInterval(ticker);
+        if (myGen !== scanGen) return true;
+        scanStats.done = true;
+        scanStats.current = '';
+        flushRender();
+        if (window.zddc && typeof window.zddc.toast === 'function') {
+            window.zddc.toast('Resumed scan complete — ' + scanStats.folders + ' folders, '
+                + scanStats.files + ' files added in ' + elapsedStr() + '.', 'success');
+        }
+        return true;
     }
 
     // Export module
@@ -656,7 +881,12 @@
         scanDirectory,
         ensureScanned,
         getZipCache,
-        extractZip
+        extractZip,
+        snapshotTree,
+        loadSnapshot,
+        resolveFileHandle,
+        resolveDirHandle,
+        resumeScan
     };
 })();
 

classifier/js/target-tree.js

@@ -0,0 +1,426 @@
+/**
+ * ZDDC Classifier — target-tree pane (Classify & Copy mode).
+ *
+ * Renders the two orthogonal target trees the user maps files onto:
+ *   - "By tracking number": folders that join with "-" into the tracking
+ *     number; the leaf folder ("A (IFR)") is the revision+status.
+ *   - "By transmittal": <party>/{received,issued}/<transmittal folder>.
+ *
+ * Structure here, placements in classify.js. Drag-and-drop assignment is wired
+ * in source-dnd.js / phase 3; this module owns rendering + folder/bin CRUD and
+ * shows the derived filename for each placed file.
+ */
+(function () {
+    'use strict';
+
+    var SLOTS = ['received', 'issued'];
+
+    var els = {};
+    var collapsed = {};            // nodeId -> true when collapsed (default expanded)
+    var openForm = null;           // { partyId, slot } when a bin form is open
+    var initialized = false;
+    var currentTab = 'tracking';   // 'tracking' | 'transmittal' — the active axis
+
+    function init() {
+        if (initialized) return;
+        initialized = true;
+        els = {
+            trackingTab: document.getElementById('trackingTab'),
+            transmittalTab: document.getElementById('transmittalTab'),
+            trackingPanel: document.getElementById('trackingPanel'),
+            transmittalPanel: document.getElementById('transmittalPanel'),
+            trackingTree: document.getElementById('trackingTree'),
+            transmittalTree: document.getElementById('transmittalTree'),
+            addTrackingRootBtn: document.getElementById('addTrackingRootBtn'),
+            addPartyBtn: document.getElementById('addPartyBtn'),
+            stats: document.getElementById('classifyStats'),
+        };
+
+        els.trackingTab.addEventListener('click', function () { showTab('tracking'); });
+        els.transmittalTab.addEventListener('click', function () { showTab('transmittal'); });
+        els.addTrackingRootBtn.addEventListener('click', function () {
+            var name = prompt('Root folder name (a tracking-number segment, e.g. "ACME-PROJ").\n'
+                + 'Brace patterns expand: BMB-{PM,EL}-{0001-0002,0005}_A (IFR)', '');
+            addFoldersFromPattern(null, name);
+        });
+        els.addPartyBtn.addEventListener('click', function () {
+            var name = prompt('Party name (also the transmittal-number prefix):', '');
+            if (name && name.trim()) C().addParty(name.trim());
+        });
+
+        els.trackingTree.addEventListener('click', onTrackingClick);
+        els.transmittalTree.addEventListener('click', onTransmittalClick);
+
+        setupDropZone(els.trackingTree, 'tracking');
+        setupDropZone(els.transmittalTree, 'transmittal');
+
+        C().on(render);
+        if (window.app.modules.store && window.app.modules.store.on) {
+            window.app.modules.store.on('files', render);
+        }
+        render();
+    }
+
+    function C() { return window.app.modules.classify; }
+    // Every scanned source file (classify mode reads the left tree, not the
+    // selection-scoped grid). Lazy folders contribute their files once scanned.
+    function allFiles() {
+        var out = [];
+        (function walk(nodes) {
+            (nodes || []).forEach(function (n) {
+                (n.files || []).forEach(function (f) { out.push(f); });
+                walk(n.children);
+            });
+        })(window.app.folderTree || []);
+        return out;
+    }
+    // One pass: group files by the node they're placed in, per axis.
+    function buildPlaced(files) {
+        var c = C(), byT = {}, byX = {};
+        files.forEach(function (f) {
+            var a = c.getAssignment(c.srcKeyForFile(f));
+            if (!a) return;
+            if (a.trackingNodeId) (byT[a.trackingNodeId] = byT[a.trackingNodeId] || []).push(f);
+            if (a.transmittalNodeId) (byX[a.transmittalNodeId] = byX[a.transmittalNodeId] || []).push(f);
+        });
+        return { tracking: byT, transmittal: byX };
+    }
+
+    function showTab(which) {
+        var t = which === 'transmittal';
+        currentTab = t ? 'transmittal' : 'tracking';
+        els.trackingTab.classList.toggle('active', !t);
+        els.transmittalTab.classList.toggle('active', t);
+        els.trackingPanel.hidden = t;
+        els.transmittalPanel.hidden = !t;
+        // The "Hide Assigned" filter on the source tree is per-axis, so the
+        // visible set changes with the active tab — re-render the left tree.
+        if (window.app.modules.tree && window.app.modules.tree.render) window.app.modules.tree.render();
+    }
+    function activeAxis() { return currentTab === 'transmittal' ? 'transmittal' : 'tracking'; }
+
+    // Expand a brace pattern into folder names and create them (confirming a
+    // multi-create first). parentId null = root folders. See expandFolderPattern.
+    function addFoldersFromPattern(parentId, raw) {
+        if (!raw || !raw.trim()) return;
+        var names = C().expandFolderPattern(raw);
+        if (!names.length) return;
+        if (names.length > 1) {
+            var shown = names.slice(0, 8).join('\n');
+            if (names.length > 8) shown += '\n…and ' + (names.length - 8) + ' more';
+            if (!confirm('Create ' + names.length + ' folders?\n\n' + shown)) return;
+        }
+        // Each expanded name is parsed into nested tracking levels (split on
+        // "-", final "_" splits the leaf rev), reusing shared ancestors.
+        names.forEach(function (nm) { C().addTrackingPath(parentId, C().parseFolderLevels(nm)); });
+    }
+
+    // ── render ───────────────────────────────────────────────────────────────
+    function render() {
+        if (!initialized || !C().isEnabled()) return;
+        var files = allFiles();
+        var placed = buildPlaced(files);
+        renderTrackingInto(els.trackingTree, C().getTrackingTree(), placed.tracking);
+        renderTransmittalInto(els.transmittalTree, C().getTransmittalTree(), placed.transmittal);
+        renderStats(files);
+    }
+
+    function renderStats(files) {
+        var s = C().stats(files);
+        if (els.stats) {
+            els.stats.textContent = s.done + ' done · ' + s.partial + ' in progress · '
+                + s.none + ' unassigned · ' + s.excluded + ' excluded';
+        }
+        var copyBtn = document.getElementById('copyOutputBtn');
+        if (copyBtn) {
+            copyBtn.disabled = s.done === 0;
+            copyBtn.textContent = s.done ? ('Copy ' + s.done + '…') : 'Copy…';
+        }
+    }
+
+    function el(tag, cls, text) {
+        var e = document.createElement(tag);
+        if (cls) e.className = cls;
+        if (text != null) e.textContent = text;
+        return e;
+    }
+
+    function nodeActions(extra) {
+        var wrap = el('span', 'tnode__actions');
+        (extra || []).forEach(function (a) {
+            var b = el('button', 'tnode__act', a.label);
+            b.dataset.act = a.act;
+            b.title = a.title || '';
+            wrap.appendChild(b);
+        });
+        return wrap;
+    }
+
+    function fileList(files) {
+        var box = el('div', 'tnode__files');
+        files.forEach(function (f) {
+            var d = C().deriveTarget(f);
+            var row = el('div', 'tfile' + (d.errors.length ? ' tfile--err' : ''));
+            row.title = d.errors.length ? d.errors.join('; ') : 'Click to find this file in the source tree';
+            row.dataset.key = d.key;                 // for cross-tree reveal
+            row.appendChild(el('span', 'tfile__orig', f.originalFilename + (f.extension ? '.' + f.extension : '')));
+            row.appendChild(el('span', 'tfile__arrow', '→'));
+            row.appendChild(el('span', 'tfile__name', d.filename || '(incomplete)'));
+            box.appendChild(row);
+        });
+        return box;
+    }
+
+    // Tracking tree (recursive)
+    function renderTrackingInto(container, nodes, placedMap) {
+        container.textContent = '';
+        if (!nodes.length) {
+            container.appendChild(el('div', 'target-empty', 'No tracking folders yet — “+ Root folder” to start.'));
+            return;
+        }
+        nodes.forEach(function (n) { container.appendChild(trackingNode(n, placedMap)); });
+    }
+    function trackingNode(n, placedMap) {
+        var isLeaf = (n.children || []).length === 0;
+        var wrap = el('div', 'tnode' + (isLeaf ? ' tnode--leaf' : ''));
+        wrap.dataset.id = n.id;
+        var row = el('div', 'tnode__row');
+
+        var toggle = el('button', 'tnode__toggle', isLeaf ? '·' : (collapsed[n.id] ? '▸' : '▾'));
+        if (!isLeaf) toggle.dataset.act = 'toggle';
+        row.appendChild(toggle);
+        row.appendChild(el('span', 'tnode__name', n.name));
+
+        var placed = placedMap[n.id] || [];
+        if (placed.length) row.appendChild(el('span', 'tnode__badge', String(placed.length)));
+
+        row.appendChild(nodeActions([
+            { act: 'add', label: '＋', title: 'Add child folder' },
+            { act: 'rename', label: '✎', title: 'Rename' },
+            { act: 'del', label: '🗑', title: 'Delete' },
+        ]));
+        wrap.appendChild(row);
+
+        if (placed.length) wrap.appendChild(fileList(placed));
+        if (!isLeaf && !collapsed[n.id]) {
+            var kids = el('div', 'tnode__children');
+            (n.children || []).forEach(function (c) { kids.appendChild(trackingNode(c, placedMap)); });
+            wrap.appendChild(kids);
+        }
+        return wrap;
+    }
+
+    // Transmittal tree
+    function renderTransmittalInto(container, parties, placedMap) {
+        container.textContent = '';
+        if (!parties.length) {
+            container.appendChild(el('div', 'target-empty', 'No parties yet — “+ Party” to start.'));
+            return;
+        }
+        parties.forEach(function (p) { container.appendChild(partyNode(p, placedMap)); });
+    }
+    function partyNode(party, placedMap) {
+        var wrap = el('div', 'tnode tnode--party');
+        wrap.dataset.id = party.id;
+        var row = el('div', 'tnode__row');
+        row.appendChild(el('span', 'tnode__icon', '🏢'));
+        row.appendChild(el('span', 'tnode__name', party.name));
+        row.appendChild(nodeActions([
+            { act: 'rename-party', label: '✎', title: 'Rename party' },
+            { act: 'del-party', label: '🗑', title: 'Delete party' },
+        ]));
+        wrap.appendChild(row);
+
+        SLOTS.forEach(function (slot) {
+            var slotNode = (party.children || []).filter(function (s) { return s.slot === slot; })[0];
+            var sw = el('div', 'tslot');
+            sw.dataset.party = party.id;
+            sw.dataset.slot = slot;
+            var sr = el('div', 'tslot__row');
+            sr.appendChild(el('span', 'tslot__name', slot));
+            var addBtn = el('button', 'tnode__act', '+ Transmittal');
+            addBtn.dataset.act = 'addbin';
+            sr.appendChild(addBtn);
+            sw.appendChild(sr);
+
+            if (openForm && openForm.partyId === party.id && openForm.slot === slot) {
+                sw.appendChild(binForm(party.id, slot));
+            }
+            (slotNode ? slotNode.children : []).forEach(function (bin) {
+                sw.appendChild(binNode(bin, placedMap));
+            });
+            wrap.appendChild(sw);
+        });
+        return wrap;
+    }
+    function binNode(bin, placedMap) {
+        var wrap = el('div', 'tnode tnode--bin');
+        wrap.dataset.id = bin.id;
+        var row = el('div', 'tnode__row');
+        row.appendChild(el('span', 'tnode__name', bin.name || '(invalid — set date/seq)'));
+        var placed = placedMap[bin.id] || [];
+        if (placed.length) row.appendChild(el('span', 'tnode__badge', String(placed.length)));
+        row.appendChild(nodeActions([{ act: 'del', label: '🗑', title: 'Delete transmittal' }]));
+        wrap.appendChild(row);
+        if (placed.length) wrap.appendChild(fileList(placed));
+        return wrap;
+    }
+
+    var STATUSES = ['---', 'IFA', 'IFB', 'IFC', 'IFD', 'IFI', 'IFP', 'IFR', 'IFU', 'REC', 'RSA', 'RSB', 'RSC', 'RSD', 'RSI', 'TBD'];
+    function binForm(partyId, slot) {
+        var form = el('div', 'binform');
+        form.dataset.party = partyId;
+        form.dataset.slot = slot;
+        var date = el('input', 'binform__date'); date.type = 'date';
+        try { date.value = new Date().toISOString().slice(0, 10); } catch (_) { /* ok */ }
+        var type = document.createElement('select'); type.className = 'binform__type';
+        ['TRN', 'SUB'].forEach(function (t) { var o = el('option', null, t); o.value = t; type.appendChild(o); });
+        var seq = el('input', 'binform__seq'); seq.type = 'text'; seq.placeholder = 'seq (e.g. 0007)';
+        var status = document.createElement('select'); status.className = 'binform__status';
+        STATUSES.forEach(function (s) { var o = el('option', null, s); o.value = s; status.appendChild(o); });
+        var title = el('input', 'binform__title'); title.type = 'text'; title.placeholder = 'title (optional)';
+        var add = el('button', 'btn btn-sm btn-primary', 'Add'); add.dataset.act = 'binadd';
+        var cancel = el('button', 'btn btn-sm btn-secondary', 'Cancel'); cancel.dataset.act = 'bincancel';
+        [date, type, seq, status, title, add, cancel].forEach(function (n) { form.appendChild(n); });
+        return form;
+    }
+
+    // ── events ─────────────────────────────────────────────────────────────
+    function closestNodeId(target) {
+        var n = target.closest('.tnode');
+        return n ? n.dataset.id : null;
+    }
+    function revealInSource(e) {
+        var tf = e.target.closest('.tfile');
+        if (tf && tf.dataset.key && window.app.modules.tree.revealFile) {
+            window.app.modules.tree.revealFile(tf.dataset.key);
+            return true;
+        }
+        return false;
+    }
+    function onTrackingClick(e) {
+        if (revealInSource(e)) return;
+        var btn = e.target.closest('[data-act]');
+        if (!btn) return;
+        var act = btn.dataset.act;
+        var id = closestNodeId(btn);
+        if (act === 'toggle') { collapsed[id] = !collapsed[id]; render(); return; }
+        if (act === 'add') {
+            var name = prompt('Child folder name (next tracking segment, or a leaf revision like "A (IFR)").\n'
+                + 'Brace patterns expand: {PM,EL,EM}-MOM-{0001-0002,0005}_A (IFR)', '');
+            addFoldersFromPattern(id, name);
+        } else if (act === 'rename') {
+            var node = C().getNode(id);
+            var nn = prompt('Rename folder:', node ? node.name : '');
+            if (nn && nn.trim()) C().renameNode(id, nn.trim());
+        } else if (act === 'del') {
+            if (confirm('Delete this folder and everything under it? Files placed here become unassigned.')) C().deleteNode(id);
+        }
+    }
+    function onTransmittalClick(e) {
+        if (revealInSource(e)) return;
+        var btn = e.target.closest('[data-act]');
+        if (!btn) return;
+        var act = btn.dataset.act;
+
+        if (act === 'addbin') {
+            var slotEl = btn.closest('.tslot');
+            openForm = { partyId: slotEl.dataset.party, slot: slotEl.dataset.slot };
+            render();
+            return;
+        }
+        if (act === 'bincancel') { openForm = null; render(); return; }
+        if (act === 'binadd') {
+            var form = btn.closest('.binform');
+            var meta = {
+                date: form.querySelector('.binform__date').value,
+                type: form.querySelector('.binform__type').value,
+                seq: form.querySelector('.binform__seq').value.trim(),
+                status: form.querySelector('.binform__status').value,
+                title: form.querySelector('.binform__title').value.trim(),
+            };
+            if (!meta.date || !meta.seq) { window.zddc.toast('Transmittal needs at least a date and a sequence number.', 'warning'); return; }
+            C().addTransmittalBin(form.dataset.party, form.dataset.slot, meta);
+            openForm = null;   // render() fires from classify.notify()
+            return;
+        }
+
+        var id = closestNodeId(btn);
+        if (act === 'rename-party') {
+            var node = C().getNode(id);
+            var nn = prompt('Rename party (re-derives its transmittal numbers):', node ? node.name : '');
+            if (nn && nn.trim()) C().renameNode(id, nn.trim());
+        } else if (act === 'del-party') {
+            if (confirm('Delete this party and all its transmittals? Files placed there become unassigned.')) C().deleteNode(id);
+        } else if (act === 'del') {
+            if (confirm('Delete this transmittal? Files placed here become unassigned.')) C().deleteNode(id);
+        }
+    }
+
+    // ── drop targets ───────────────────────────────────────────────────────
+    // Resolve the drop target under an event:
+    //   tracking    → any folder node (.tnode)
+    //   transmittal → a transmittal bin only (.tnode--bin)
+    function dropTarget(target, axis) {
+        var sel = axis === 'transmittal' ? '.tnode--bin' : '.tnode';
+        var node = target.closest(sel);
+        if (!node || !node.dataset.id) return null;
+        return { id: node.dataset.id, row: node.querySelector('.tnode__row') || node };
+    }
+    function clearHover(container) {
+        var hot = container.querySelectorAll('.drop-hover');
+        for (var i = 0; i < hot.length; i++) hot[i].classList.remove('drop-hover');
+    }
+    function setupDropZone(container, axis) {
+        container.addEventListener('dragover', function (e) {
+            if (!window.app.modules.dnd.active()) return;
+            var t = dropTarget(e.target, axis);
+            clearHover(container);
+            if (!t) return;
+            e.preventDefault();
+            e.dataTransfer.dropEffect = 'copy';
+            t.row.classList.add('drop-hover');
+        });
+        container.addEventListener('dragleave', function (e) {
+            if (e.target === container) clearHover(container);
+        });
+        container.addEventListener('drop', function (e) {
+            var t = dropTarget(e.target, axis);
+            clearHover(container);
+            if (!t) return;
+            e.preventDefault();
+            var keys = window.app.modules.dnd.getDrag();
+            window.app.modules.dnd.clearDrag();
+            if (keys.length) C().place(keys, t.id, axis);
+        });
+    }
+
+    // Reveal a source key's placement in the target pane (source → target).
+    function reveal(key) {
+        var a = C().getAssignment(key);
+        if (!a) return;
+        if (a.trackingNodeId) {
+            showTab('tracking'); collapsed = {}; render();
+            flashNode(els.trackingTree, a.trackingNodeId);
+        } else if (a.transmittalNodeId) {
+            showTab('transmittal'); render();
+            flashNode(els.transmittalTree, a.transmittalNodeId);
+        }
+    }
+    function flashNode(container, id) {
+        var node = container.querySelector('.tnode[data-id="' + id + '"]');
+        if (!node) return;
+        node.scrollIntoView({ block: 'center' });
+        var row = node.querySelector('.tnode__row') || node;
+        row.classList.add('reveal-flash');
+        setTimeout(function () { row.classList.remove('reveal-flash'); }, 1500);
+    }
+
+    window.app.modules.targetTree = {
+        init: init,
+        render: render,
+        showTab: showTab,
+        activeAxis: activeAxis,
+        reveal: reveal,
+    };
+})();

classifier/js/tree.js

@@ -5,11 +5,73 @@
 (function() {
     'use strict';
 
+    // ── Classify & Copy helpers ────────────────────────────────────────────
+    function classifyOn() {
+        var c = window.app.modules.classify;
+        return c && c.isEnabled();
+    }
+    // All file objects in a folder's (already-scanned) subtree — group-drag.
+    function subtreeFiles(folder, out) {
+        out = out || [];
+        (folder.files || []).forEach(function (f) { out.push(f); });
+        (folder.children || []).forEach(function (c) { subtreeFiles(c, out); });
+        return out;
+    }
+    function keysFor(files) {
+        var c = window.app.modules.classify;
+        return files.map(function (f) { return c.srcKeyForFile(f); });
+    }
+    // A small status dot reflecting a file's classification state.
+    var STATE_TITLE = {
+        none: 'unassigned', tracking: 'has tracking number, needs a transmittal',
+        transmittal: 'in a transmittal, needs a tracking number',
+        partial: 'placed, but the name is incomplete', done: 'fully classified',
+        excluded: 'excluded — will not be copied',
+    };
+    function stateDot(state) {
+        var dot = document.createElement('span');
+        dot.className = 'cl-dot cl-dot--' + state;
+        dot.title = STATE_TITLE[state] || '';
+        return dot;
+    }
+
+    // ── "Hide Assigned" filter (classify mode) ─────────────────────────────
+    // The goal in either target tab is to assign-or-exclude every file, so this
+    // collapses the left tree down to only what's left to deal with on the
+    // ACTIVE axis: hide files already assigned in the current tab (or excluded),
+    // and any folder whose whole (scanned) subtree is thereby empty.
+    var hideAssigned = false;
+    function setHideAssigned(on) { hideAssigned = !!on; render(); }
+    function activeAxis() {
+        var tt = window.app.modules.targetTree;
+        return (tt && tt.activeAxis) ? tt.activeAxis() : 'tracking';
+    }
+    function fileDealtWith(file) {
+        var c = window.app.modules.classify;
+        var a = c.getAssignment(c.srcKeyForFile(file));
+        if (!a) return false;
+        if (a.excluded) return true;
+        return activeAxis() === 'transmittal' ? !!a.transmittalNodeId : !!a.trackingNodeId;
+    }
+    function subtreeRemaining(folder) {
+        var n = 0;
+        subtreeFiles(folder).forEach(function (f) { if (!fileDealtWith(f)) n++; });
+        return n;
+    }
+    // Hide a folder only when it's fully scanned (so we never hide one that may
+    // still reveal files) and nothing in its subtree remains to be dealt with.
+    function folderHidden(folder) {
+        if (!classifyOn() || !hideAssigned) return false;
+        if (folder.scanState && folder.scanState !== 'done') return false;
+        return subtreeRemaining(folder) === 0;
+    }
+
     /**
      * Render the folder tree
      */
     function render() {
         const container = window.app.dom.folderTree;
+        wireClassifyInteractions();
         container.innerHTML = '';
 
         if (window.app.folderTree.length === 0) {
@@ -18,6 +80,7 @@
         }
 
         window.app.folderTree.forEach(folder => {
+            if (folderHidden(folder)) return;
             const element = createFolderElement(folder);
             container.appendChild(element);
         });
@@ -35,11 +98,15 @@
      */
     function populateCount(el, folder) {
         el.textContent = '';
+        el.classList.remove('done');
         const st = folder.scanState;
         if (st === 'pending') return;
+        if (st === 'zip-pending') { el.textContent = '(zip — open to scan)'; return; }
         if (st === 'scanning') { el.textContent = 'scanning…'; return; }
 
         const done = st === 'done';
+        // When fully scanned both numbers are blue; .done turns the labels blue too.
+        if (done) el.classList.add('done');
         const dDir = folder.subdirCount || 0, tDir = folder.runDirs || 0;
         const dFile = folder.fileCount || 0, tFile = folder.runFiles || 0;
 
@@ -47,17 +114,29 @@
         frag.appendChild(document.createTextNode('('));
         if (dDir > 0 || tDir > 0) {
             appendPair(frag, dDir, tDir, done);
-            frag.appendChild(document.createTextNode(tDir === 1 ? ' folder, ' : ' folders, '));
+            appendLabel(frag, tDir === 1 ? ' folder, ' : ' folders, ');
         }
         appendPair(frag, dFile, tFile, done);
-        frag.appendChild(document.createTextNode(tFile === 1 ? ' file)' : ' files)'));
+        appendLabel(frag, tFile === 1 ? ' file)' : ' files)');
         el.appendChild(frag);
     }
 
-    // Append "<direct>" and, when there's a subtree (or scanning is ongoing),
-    // "+<total>" with the total in a span that greys + pulses until final.
+    // The "folders"/"files" word labels — blue only once the row is .done.
+    function appendLabel(frag, text) {
+        const s = document.createElement('span');
+        s.className = 'ct-label';
+        s.textContent = text;
+        frag.appendChild(s);
+    }
+
+    // Append "<direct>" (always a completed/blue number) and, when there's a
+    // subtree (or scanning is ongoing), "+<total>" with the total in a span
+    // that greys + pulses until final, then turns blue.
     function appendPair(frag, direct, total, done) {
-        frag.appendChild(document.createTextNode(String(direct)));
+        const d = document.createElement('span');
+        d.className = 'ct-direct';
+        d.textContent = String(direct);
+        frag.appendChild(d);
         if (!done || total > direct) {
             frag.appendChild(document.createTextNode('+'));
             const t = document.createElement('span');
@@ -88,12 +167,28 @@
             item.classList.add('selected');
         }
 
+        // Classify mode: the folder row is a drag source for a group-drag of
+        // every file in its subtree.
+        if (classifyOn()) {
+            item.draggable = true;
+            item.addEventListener('dragstart', function (e) {
+                e.stopPropagation();
+                var files = subtreeFiles(folder);
+                if (!files.length) { e.preventDefault(); return; }
+                window.app.modules.dnd.setDrag(keysFor(files), e);
+            });
+        }
+
         // Toggle button: shown when the folder has children OR hasn't been
         // scanned yet (it might have children — expanding triggers its scan).
         const toggle = document.createElement('span');
         toggle.className = 'folder-toggle';
         const mightHaveChildren = (folder.children && folder.children.length > 0)
-            || folder.scanState === 'pending';
+            || folder.scanState === 'pending'
+            || folder.scanState === 'zip-pending'
+            // Classify mode: a folder with files (even none of subfolders) is
+            // expandable so its files can be revealed and dragged.
+            || (classifyOn() && folder.files && folder.files.length > 0);
         if (mightHaveChildren) {
             toggle.textContent = folder.expanded ? '▼' : '▶';
             toggle.addEventListener('click', (e) => {
@@ -118,6 +213,12 @@
         }
         item.appendChild(icon);
 
+        // Classify mode: an aggregate state dot for the folder's subtree.
+        if (classifyOn()) {
+            const agg = aggregateState(subtreeFiles(folder));
+            if (agg) item.appendChild(stateDot(agg));
+        }
+
         // Folder name
         const name = document.createElement('span');
         name.className = 'folder-name';
@@ -172,15 +273,62 @@
             const childrenDiv = document.createElement('div');
             childrenDiv.className = 'folder-children';
             folder.children.forEach(child => {
+                if (folderHidden(child)) return;
                 const childElement = createFolderElement(child, level + 1);
                 childrenDiv.appendChild(childElement);
             });
             div.appendChild(childrenDiv);
         }
 
+        // Classify mode: list this folder's own files (draggable leaves) when
+        // expanded, so they can be dropped onto the target trees.
+        if (classifyOn() && folder.expanded && folder.files && folder.files.length > 0) {
+            const filesDiv = document.createElement('div');
+            filesDiv.className = 'folder-children folder-files';
+            folder.files.forEach(function (file) {
+                if (hideAssigned && fileDealtWith(file)) return;
+                filesDiv.appendChild(createFileElement(file, level + 1));
+            });
+            div.appendChild(filesDiv);
+        }
+
         return div;
     }
 
+    /**
+     * Create a draggable source-file row (classify mode only).
+     */
+    function createFileElement(file, level) {
+        const c = window.app.modules.classify;
+        const item = document.createElement('div');
+        item.className = 'file-item';
+        item.style.paddingLeft = `${level * 1.5}rem`;
+        item.draggable = true;
+        item.title = 'Click to preview · drag onto a tracking folder or transmittal to assign';
+        const key = c.srcKeyForFile(file);
+        item.dataset.key = key;
+        const st = c.fileState(file);
+        if (st === 'excluded') item.classList.add('excluded');
+
+        item.appendChild(stateDot(st));
+
+        const icon = document.createElement('span');
+        icon.className = 'file-icon';
+        icon.innerHTML = '&#128196;'; // 📄
+        item.appendChild(icon);
+
+        const name = document.createElement('span');
+        name.className = 'file-name';
+        name.textContent = zddc.joinExtension(file.originalFilename, file.extension);
+        item.appendChild(name);
+
+        item.addEventListener('dragstart', function (e) {
+            e.stopPropagation();
+            window.app.modules.dnd.setDrag([key], e);
+        });
+        return item;
+    }
+
     /**
      * Handle folder click with multi-select support
      */
@@ -567,6 +715,146 @@
         container.tabIndex = 0;
     }
 
+    // ── Classify interactions (exclude menu, cross-tree reveal) ─────────────
+    var classifyWired = false;
+    function wireClassifyInteractions() {
+        if (classifyWired) return;
+        classifyWired = true;
+        var ft = window.app.dom.folderTree;
+        if (!ft) { classifyWired = false; return; }
+        ft.addEventListener('contextmenu', onContextMenu);
+        // Single-click a source file → preview it (the "look at it, then assign"
+        // half of the workflow). Drag still assigns; right-click excludes.
+        ft.addEventListener('click', function (e) {
+            if (!classifyOn()) return;
+            var fe = e.target.closest('.file-item');
+            if (!fe || !fe.dataset.key) return;
+            var file = findFileByKey(fe.dataset.key);
+            if (file && window.app.modules.preview && window.app.modules.preview.previewFile) {
+                window.app.modules.preview.previewFile(file);
+            }
+        });
+    }
+
+    // Aggregate classification state across a folder's loaded subtree files.
+    function aggregateState(files) {
+        if (!files.length) return null;
+        var c = window.app.modules.classify;
+        var ex = 0, done = 0, placed = 0;
+        files.forEach(function (f) {
+            var s = c.fileState(f);
+            if (s === 'excluded') ex++;
+            else if (s === 'done') done++;
+            else if (s !== 'none') placed++;
+        });
+        if (ex === files.length) return 'excluded';
+        var active = files.length - ex;
+        if (active > 0 && done === active) return 'done';
+        if (done > 0 || placed > 0) return 'partial';
+        return 'none';
+    }
+
+    function findFolderByPath(path) {
+        var hit = null;
+        (function walk(nodes) {
+            (nodes || []).forEach(function (n) {
+                if (hit) return;
+                if (n.path === path) { hit = n; return; }
+                walk(n.children);
+            });
+        })(window.app.folderTree);
+        return hit;
+    }
+    function findFileByKey(key) {
+        var c = window.app.modules.classify, hit = null;
+        (function walk(nodes) {
+            (nodes || []).forEach(function (n) {
+                if (hit) return;
+                (n.files || []).forEach(function (f) { if (!hit && c.srcKeyForFile(f) === key) hit = f; });
+                walk(n.children);
+            });
+        })(window.app.folderTree);
+        return hit;
+    }
+    function expandToPath(folderPath) {
+        (function walk(nodes) {
+            (nodes || []).forEach(function (n) {
+                if (n.path === folderPath || folderPath.indexOf(n.path + '/') === 0) {
+                    n.expanded = true;
+                    walk(n.children);
+                }
+            });
+        })(window.app.folderTree);
+    }
+
+    // Reveal a source file (target → source). Expands its folder chain, renders,
+    // scrolls + flashes the row.
+    function revealFile(key) {
+        var file = findFileByKey(key);
+        if (!file) return;
+        expandToPath(file.folderPath);
+        render();
+        var rows = window.app.dom.folderTree.querySelectorAll('.file-item');
+        var row = Array.prototype.filter.call(rows, function (r) { return r.dataset.key === key; })[0];
+        if (row) {
+            row.scrollIntoView({ block: 'center' });
+            row.classList.add('match-highlight');
+            setTimeout(function () { row.classList.remove('match-highlight'); }, 1500);
+        }
+    }
+
+    // ── context menu (exclude / include / clear) ───────────────────────────
+    var menuEl = null;
+    function hideMenu() { if (menuEl) { menuEl.remove(); menuEl = null; } }
+    function showMenu(x, y, items) {
+        hideMenu();
+        menuEl = document.createElement('div');
+        menuEl.className = 'cl-menu';
+        items.forEach(function (it) {
+            var b = document.createElement('button');
+            b.className = 'cl-menu__item';
+            b.textContent = it.label;
+            b.addEventListener('click', function () { hideMenu(); it.fn(); });
+            menuEl.appendChild(b);
+        });
+        menuEl.style.left = x + 'px';
+        menuEl.style.top = y + 'px';
+        document.body.appendChild(menuEl);
+        setTimeout(function () {
+            document.addEventListener('click', hideMenu, { once: true });
+            document.addEventListener('scroll', hideMenu, { once: true, capture: true });
+        }, 0);
+    }
+    function onContextMenu(e) {
+        if (!classifyOn()) return;
+        var c = window.app.modules.classify;
+        var fileEl = e.target.closest('.file-item');
+        var folderEl = e.target.closest('.folder-item');
+        if (!fileEl && !folderEl) return;
+        e.preventDefault();
+        var items = [];
+        if (fileEl) {
+            var key = fileEl.dataset.key;
+            var a = c.getAssignment(key);
+            var excluded = !!(a && a.excluded);
+            items.push({ label: excluded ? 'Include in copy' : 'Exclude from copy', fn: function () { c.setExcluded([key], !excluded); } });
+            if (a && (a.trackingNodeId || a.transmittalNodeId)) {
+                if (a.trackingNodeId) items.push({ label: 'Clear tracking', fn: function () { c.place([key], null, 'tracking'); } });
+                if (a.transmittalNodeId) items.push({ label: 'Clear transmittal', fn: function () { c.place([key], null, 'transmittal'); } });
+            }
+        } else {
+            var folder = findFolderByPath(folderEl.dataset.path);
+            var keys = keysFor(subtreeFiles(folder || { files: [], children: [] }));
+            if (!keys.length) return;
+            var allExcl = keys.every(function (k) { var a = c.getAssignment(k); return a && a.excluded; });
+            items.push({
+                label: (allExcl ? 'Include' : 'Exclude') + ' folder (' + keys.length + ' file' + (keys.length === 1 ? '' : 's') + ')',
+                fn: function () { c.setExcluded(keys, !allExcl); },
+            });
+        }
+        showMenu(e.clientX, e.clientY, items);
+    }
+
     // Export module
     window.app.modules.tree = {
         render,
@@ -574,6 +862,8 @@
         loadFilesFromSelectedFolders,
         setupKeyboardShortcuts,
         expandAll,
-        selectAll
+        selectAll,
+        revealFile,
+        setHideAssigned
     };
 })();

classifier/js/workspace.js

@@ -0,0 +1,304 @@
+/**
+ * ZDDC Classifier — workspace manager (Classify & Copy).
+ *
+ * A workspace = one classification project: a source directory handle, a
+ * snapshot of its completed scan, and the Classify & Copy map. The welcome
+ * screen lists them; opening one resumes instantly from the snapshot (no
+ * re-scan), and the map autosaves as you work. Only Copy needs the live
+ * filesystem (a one-click permission re-grant).
+ */
+(function () {
+    'use strict';
+
+    var els = {};
+    var initialized = false;
+    var activeId = null;
+    var activeMeta = null;       // {id,name,rootName,createdAt,updatedAt,summary}
+    var activeStoredHandle = null; // the workspace's persisted source dir handle
+
+    function P() { return window.app.modules.persist; }
+    function C() { return window.app.modules.classify; }
+    function now() { return Date.now(); }
+    function uid() {
+        if (window.crypto && typeof window.crypto.randomUUID === 'function') {
+            try { return window.crypto.randomUUID(); } catch (_) { /* non-secure ctx */ }
+        }
+        return 'w' + now().toString(36) + Math.floor(Math.random() * 1e9).toString(36);
+    }
+
+    function init() {
+        if (initialized) return;
+        initialized = true;
+        els = {
+            welcome: document.getElementById('welcomeScreen'),
+            list: document.getElementById('workspaceList'),
+            newBtn: document.getElementById('newWorkspaceBtn'),
+            wsBtn: document.getElementById('workspacesBtn'),
+            connectBtn: document.getElementById('connectDirBtn'),
+        };
+        if (!P() || !P().available) {
+            // No IndexedDB → hide the workspace UI; legacy rename path still works.
+            var wrap = document.getElementById('workspacesSection');
+            if (wrap) wrap.style.display = 'none';
+            return;
+        }
+        if (els.newBtn) els.newBtn.addEventListener('click', newWorkspace);
+        if (els.wsBtn) els.wsBtn.addEventListener('click', showWelcome);
+        if (els.connectBtn) els.connectBtn.addEventListener('click', function () { tryReconnect(false); });
+        if (els.list) els.list.addEventListener('click', onListClick);
+
+        // Autosave the active workspace whenever the map changes.
+        C().on(scheduleAutosave);
+
+        renderList();
+    }
+
+    // ── welcome list ────────────────────────────────────────────────────────
+    function showWelcome() {
+        if (els.welcome) els.welcome.classList.remove('hidden');
+        renderList();
+    }
+    function hideWelcome() {
+        if (els.welcome) els.welcome.classList.add('hidden');
+    }
+
+    function relTime(ts) {
+        if (!ts) return '';
+        var s = Math.max(0, Math.round((now() - ts) / 1000));
+        if (s < 60) return 'just now';
+        var m = Math.round(s / 60); if (m < 60) return m + 'm ago';
+        var h = Math.round(m / 60); if (h < 24) return h + 'h ago';
+        var d = Math.round(h / 24); return d + 'd ago';
+    }
+
+    function renderList() {
+        if (!els.list) return;
+        P().listWorkspaces().then(function (rows) {
+            els.list.textContent = '';
+            if (!rows.length) {
+                var empty = document.createElement('div');
+                empty.className = 'ws-empty';
+                empty.textContent = 'No workspaces yet. “+ New workspace” scans a folder once and saves it here.';
+                els.list.appendChild(empty);
+                return;
+            }
+            rows.forEach(function (r) { els.list.appendChild(rowEl(r)); });
+        });
+    }
+    function rowEl(r) {
+        var s = r.summary || { files: 0, done: 0, excluded: 0 };
+        var row = document.createElement('div');
+        row.className = 'ws-row';
+        row.dataset.id = r.id;
+
+        var main = document.createElement('div');
+        main.className = 'ws-row__main';
+        var nm = document.createElement('div'); nm.className = 'ws-row__name'; nm.textContent = r.name;
+        var meta = document.createElement('div'); meta.className = 'ws-row__meta';
+        meta.textContent = (r.rootName || '') + ' · ' + s.done + '/' + s.files + ' classified'
+            + (s.excluded ? (' · ' + s.excluded + ' excluded') : '') + ' · updated ' + relTime(r.updatedAt);
+        main.appendChild(nm); main.appendChild(meta);
+
+        var actions = document.createElement('div');
+        actions.className = 'ws-row__actions';
+        [['open', 'Open'], ['rename', 'Rename'], ['delete', 'Delete']].forEach(function (a) {
+            var b = document.createElement('button');
+            b.className = 'btn btn-sm ' + (a[0] === 'open' ? 'btn-primary' : 'btn-secondary');
+            b.dataset.act = a[0]; b.textContent = a[1];
+            actions.appendChild(b);
+        });
+        row.appendChild(main); row.appendChild(actions);
+        return row;
+    }
+    function onListClick(e) {
+        var btn = e.target.closest('[data-act]');
+        if (!btn) return;
+        var row = btn.closest('.ws-row');
+        var id = row && row.dataset.id;
+        if (!id) return;
+        if (btn.dataset.act === 'open') openWorkspace(id);
+        else if (btn.dataset.act === 'rename') renameWorkspace(id);
+        else if (btn.dataset.act === 'delete') deleteWorkspace(id);
+    }
+
+    // ── summary ───────────────────────────────────────────────────────────
+    function allFiles() {
+        var out = [];
+        (function walk(ns) { (ns || []).forEach(function (n) { (n.files || []).forEach(function (f) { out.push(f); }); walk(n.children); }); })(window.app.folderTree || []);
+        return out;
+    }
+    function summary() {
+        var s = C().stats(allFiles());
+        return { files: s.total, done: s.done, excluded: s.excluded };
+    }
+
+    // ── create / open / rename / delete ─────────────────────────────────────
+    async function newWorkspace() {
+        if (!window.showDirectoryPicker) {
+            window.zddc.toast('Workspaces need the File System Access API (use Chromium).', 'error');
+            return;
+        }
+        var dir;
+        try { dir = await window.showDirectoryPicker(); }
+        catch (e) { if (e.name !== 'AbortError') window.zddc.toast('Could not open folder — ' + (e.message || e), 'error'); return; }
+
+        var name = prompt('Name this workspace:', dir.name);
+        if (name === null) name = dir.name;
+        name = name.trim() || dir.name;
+
+        window.app.rootHandle = dir;
+        activeStoredHandle = dir;
+        window.app.modules.app.enterAppShell();
+        window.app.modules.app.setMode('classify');
+        hideWelcome();
+
+        activeId = uid();
+        activeMeta = { id: activeId, name: name, rootName: dir.name, createdAt: now(), updatedAt: now(), summary: { files: 0, done: 0, excluded: 0 } };
+        // Create the record UP FRONT so an interrupted scan survives and resumes.
+        await saveSnapshotFull();
+        updateConnectUI();
+
+        // Periodically persist the partial snapshot during the (slow) scan, so an
+        // interruption resumes from where it left off instead of starting over.
+        var iv = setInterval(saveSnapshotFull, 5000);
+        try { await window.app.modules.scanner.scanDirectory(dir); }
+        finally { clearInterval(iv); saveSnapshotFull(); }
+    }
+
+    async function openWorkspace(id) {
+        var rec = await P().getWorkspace(id);
+        var rows = await P().listWorkspaces();
+        var meta = rows.filter(function (r) { return r.id === id; })[0];
+        if (!rec || !meta) { window.zddc.toast('Could not load that workspace.', 'error'); return; }
+
+        activeId = id;
+        activeMeta = meta;
+        activeStoredHandle = rec.rootHandle || null;
+        window.app.rootHandle = null;            // not connected until reconnect
+        window.app.modules.app.enterAppShell();
+        window.app.modules.scanner.loadSnapshot(rec.tree || []);
+        C().load(rec.classify || {});
+        window.app.modules.app.setMode('classify');
+        hideWelcome();
+
+        // Offer to reconnect the source directory (needed to preview, copy, or
+        // finish an interrupted scan). Silent if permission is already granted.
+        await tryReconnect(true);
+        updateConnectUI();
+    }
+
+    // Persist the full workspace (meta + snapshot + map + source handle).
+    function saveSnapshotFull() {
+        if (!activeId || !activeMeta) return Promise.resolve();
+        activeMeta.updatedAt = now();
+        activeMeta.summary = summary();
+        return P().putWorkspace(activeMeta, {
+            id: activeId,
+            rootHandle: window.app.rootHandle || activeStoredHandle || null,
+            tree: window.app.modules.scanner.snapshotTree(),
+            classify: C().serialize(),
+        });
+    }
+
+    // Connect (or reconnect) the source directory. silentOnly=true never shows a
+    // permission prompt or picker — it only adopts an already-granted handle and
+    // otherwise nudges the user to click "Connect directory".
+    async function tryReconnect(silentOnly) {
+        var h = activeStoredHandle;
+        if (h && typeof h.queryPermission === 'function') {
+            var p = 'denied';
+            try { p = await h.queryPermission({ mode: 'read' }); } catch (_) { /* ignore */ }
+            if (p === 'granted') { window.app.rootHandle = h; return afterConnect(); }
+            if (!silentOnly) {
+                var p2 = 'denied';
+                try { p2 = await h.requestPermission({ mode: 'read' }); } catch (_) { /* ignore */ }
+                if (p2 === 'granted') { window.app.rootHandle = h; return afterConnect(); }
+            }
+        }
+        if (silentOnly) {
+            if (!window.app.rootHandle && activeId) {
+                window.zddc.toast('This workspace’s source directory isn’t connected — click “Connect directory” to preview, copy, or finish scanning.', 'info', { durationMs: 8000 });
+            }
+            return false;
+        }
+        // Explicit: no usable stored handle (or permission denied) → let the user pick.
+        if (!window.showDirectoryPicker) { window.zddc.toast('Connecting a directory needs the File System Access API.', 'error'); return false; }
+        try {
+            var picked = await window.showDirectoryPicker();
+            window.app.rootHandle = picked;
+            activeStoredHandle = picked;
+            return afterConnect();
+        } catch (e) {
+            if (e.name !== 'AbortError') window.zddc.toast('Could not connect directory — ' + (e.message || e), 'error');
+            return false;
+        }
+    }
+
+    async function afterConnect() {
+        updateConnectUI();
+        // Resume any still-pending folders now that we have the handle.
+        var did = await window.app.modules.scanner.resumeScan(window.app.rootHandle);
+        saveSnapshotFull();   // persist refreshed snapshot + the (re-granted) handle
+        return true;
+    }
+
+    function updateConnectUI() {
+        if (!els.connectBtn) return;
+        var show = !!activeId && !window.app.rootHandle;
+        els.connectBtn.hidden = !show;
+    }
+
+    function renameWorkspace(id) {
+        P().listWorkspaces().then(function (rows) {
+            var meta = rows.filter(function (r) { return r.id === id; })[0];
+            if (!meta) return;
+            var name = prompt('Rename workspace:', meta.name);
+            if (!name || !name.trim()) return;
+            meta.name = name.trim(); meta.updatedAt = now();
+            if (activeMeta && activeMeta.id === id) activeMeta.name = meta.name;
+            P().putWorkspace(meta, null).then(renderList);
+        });
+    }
+    function deleteWorkspace(id) {
+        if (!confirm('Delete this workspace? The map and snapshot are removed — your source files are untouched.')) return;
+        if (activeId === id) { activeId = null; activeMeta = null; }
+        P().deleteWorkspace(id).then(renderList);
+    }
+
+    // ── autosave (debounced) ────────────────────────────────────────────────
+    var saveTimer = null;
+    function scheduleAutosave() {
+        if (!activeId || !activeMeta) return;
+        if (saveTimer) clearTimeout(saveTimer);
+        saveTimer = setTimeout(function () {
+            saveTimer = null;
+            activeMeta.updatedAt = now();
+            activeMeta.summary = summary();
+            // classify-only put: tree omitted → the stored snapshot is preserved.
+            P().putWorkspace(activeMeta, { id: activeId, classify: C().serialize() });
+        }, 500);
+    }
+
+    // Called after a "Refresh from disk" rescan — re-persist the snapshot for
+    // the active workspace (the path-keyed map carries over automatically).
+    function onRescanned() {
+        if (!activeId || !activeMeta) return;
+        activeMeta.updatedAt = now();
+        activeMeta.summary = summary();
+        P().putWorkspace(activeMeta, {
+            id: activeId,
+            tree: window.app.modules.scanner.snapshotTree(),
+            classify: C().serialize(),
+        });
+    }
+
+    window.app.modules.workspace = {
+        init: init,
+        showWelcome: showWelcome,
+        newWorkspace: newWorkspace,
+        openWorkspace: openWorkspace,
+        onRescanned: onRescanned,
+        renderList: renderList,
+        activeId: function () { return activeId; },
+    };
+})();

classifier/template.html

@@ -30,6 +30,12 @@
                     </div>
                     <button id="addDirectoryBtn" class="btn btn-primary">Use Local Directory</button>
                     <button id="refreshHeaderBtn" class="btn btn-secondary hidden" title="Refresh and rescan directory" aria-label="Refresh" style="font-size:1.1rem;">⟳</button>
+                    <div class="mode-switch" id="modeSwitch" role="group" aria-label="Workflow mode">
+                        <button id="modeClassifyBtn" class="mode-btn active" title="Map files onto tracking numbers and transmittals, then copy renamed copies to an output directory — the source is never modified">Classify &amp; copy</button>
+                        <button id="modeRenameBtn" class="mode-btn" title="Edit a spreadsheet and rename the files in place (edits the source)">Rename in place</button>
+                    </div>
+                    <button id="workspacesBtn" class="btn btn-secondary btn-sm" title="Workspaces — open or create a classification project">≡ Workspaces</button>
+                    <button id="connectDirBtn" class="btn btn-primary btn-sm" title="Connect this workspace's source directory to preview, copy, or finish scanning" hidden>⮷ Connect directory</button>
                 </div>
                 <div class="header-right">
             <button id="theme-btn" class="btn btn-secondary" title="Theme: auto (follows OS)" aria-label="Theme: auto (follows OS)">◐</button>
@@ -51,22 +57,26 @@
                                 <input type="checkbox" id="autoScrollCheckbox" checked>
                                 Auto-scroll
                             </label>
-                            <label class="checkbox-label">
+                            <label class="checkbox-label" id="hideCompliantLabel">
                                 <input type="checkbox" id="hideCompliantCheckbox">
                                 Hide Compliant
                             </label>
+                            <label class="checkbox-label" id="hideAssignedLabel" hidden
+                                   title="Hide files already assigned in the active tab (or excluded), and folders left empty">
+                                <input type="checkbox" id="hideAssignedCheckbox">
+                                Hide Assigned
+                            </label>
                             <span id="selectedFoldersCount" class="folder-count">0 folders selected</span>
                         </div>
                     </div>
-                    <div id="scanStatus" class="scan-status" aria-live="polite"></div>
                     <div id="folderTree" class="folder-tree">
                         <!-- Dynamically populated -->
                     </div>
                     <div class="resize-handle" id="treeResizeHandle"></div>
                 </aside>
 
-                <!-- Spreadsheet Table -->
-                <main class="spreadsheet-pane">
+                <!-- Spreadsheet Table (Rename in place) -->
+                <main class="spreadsheet-pane" id="spreadsheetPane" hidden>
                     <div class="pane-header">
                         <div class="pane-header-left">
                             <h3>Files</h3>
@@ -127,20 +137,82 @@
                     </div>
                 </main>
 
+                <!-- Target Trees (Classify & Copy mode) — default view -->
+                <main class="target-pane" id="targetPane">
+                    <div class="pane-header">
+                        <div class="target-tabs" role="tablist">
+                            <button class="target-tab active" id="trackingTab" role="tab">By tracking number</button>
+                            <button class="target-tab" id="transmittalTab" role="tab">By transmittal</button>
+                        </div>
+                        <div class="pane-header-right">
+                            <span id="classifyStats" class="file-stats"></span>
+                            <span class="header-divider">|</span>
+                            <button id="copyOutputBtn" class="btn btn-primary btn-sm" disabled title="Copy mapped files to an output directory (source untouched)">Copy…</button>
+                        </div>
+                    </div>
+                    <div class="target-body">
+                        <section id="trackingPanel" class="target-panel">
+                            <div class="target-panel__toolbar">
+                                <button id="addTrackingRootBtn" class="btn btn-sm btn-secondary">+ Root folder</button>
+                                <span class="target-hint">Folders join with “-” into the tracking number; the leaf folder is the revision — name it like “A (IFR)”.</span>
+                            </div>
+                            <div id="trackingTree" class="target-tree"></div>
+                        </section>
+                        <section id="transmittalPanel" class="target-panel" hidden>
+                            <div class="target-panel__toolbar">
+                                <button id="addPartyBtn" class="btn btn-sm btn-secondary">+ Party</button>
+                                <span class="target-hint">&lt;party&gt;/{received,issued}/&lt;transmittal&gt;. Drag files (or a whole folder) into a transmittal.</span>
+                            </div>
+                            <div id="transmittalTree" class="target-tree"></div>
+                        </section>
+                    </div>
+                </main>
+
             </div>
 
+            <!-- Page footer — scan status lives here -->
+            <footer class="app-footer">
+                <span id="scanStatus" class="scan-status" aria-live="polite"></span>
+            </footer>
+
             <!-- Empty State — shown until a directory is selected -->
             <div id="welcomeScreen" class="empty-state empty-state--overlay">
-                <div class="empty-state__inner empty-state__inner--centered">
-                    <h2>ZDDC Classifier</h2>
-                    <p style="background:var(--bg-secondary);padding:0.75rem 1rem;border-left:3px solid var(--warning);text-align:left;font-size:0.9rem;color:var(--text-muted);margin-bottom:1rem;">
-                        <strong>This standalone tool is being absorbed into the Browse app.</strong>
-                        Browse's <em>Grid</em> view-mode now provides the same spreadsheet
-                        workflow alongside file navigation. This standalone build remains
-                        available for offline use and air-gapped environments.
-                    </p>
-                    <p>Rename a folder of files to ZDDC format using a spreadsheet interface.</p>
-                    <p>Open a directory, fill in tracking number, revision, status, and title for each file, then save — the files are renamed on disk.</p>
+                <div class="empty-state__inner empty-state__inner--centered welcome">
+                    <h1 class="welcome__title">ZDDC Classifier</h1>
+                    <p class="welcome__lede">Turn a messy folder of project files into clean, correctly-named ZDDC documents — organized by tracking number and transmittal — <strong>without ever changing your originals</strong>.</p>
+
+                    <!-- Workspaces (Classify & Copy) -->
+                    <section id="workspacesSection" class="workspaces">
+                        <div class="ws-head">
+                            <h2>Your workspaces</h2>
+                            <button id="newWorkspaceBtn" class="btn btn-primary">+ New workspace</button>
+                        </div>
+                        <div id="workspaceList" class="ws-list"><!-- rendered --></div>
+                    </section>
+
+                    <!-- Two-method tutorial -->
+                    <div class="welcome__methods">
+                        <section class="method method--primary">
+                            <h3 class="method__title">① Classify &amp; copy <span class="method__tag">recommended · non-destructive</span></h3>
+                            <p class="method__what">Build a tidy copy of a project in a separate output folder. Your source files are only ever <em>read</em>, never renamed or moved.</p>
+                            <ol class="method__steps">
+                                <li><strong>New workspace</strong> → pick a folder. It scans <em>once</em> and saves to this browser, so you can close the tab and pick up later.</li>
+                                <li><strong>Preview</strong> a file (single-click it in the left tree) to see what it actually is.</li>
+                                <li><strong>Drag</strong> it onto the right pane — onto a <em>tracking-number</em> folder (the folder path becomes the number, the leaf is the revision, e.g. <code>A (IFR)</code>), and onto a <em>transmittal</em> (party + date + TRN/SUB + sequence).</li>
+                                <li><strong>Copy</strong> when ready → choose an output directory; renamed copies are written as <code>&lt;party&gt;/&lt;transmittal&gt;/&lt;name&gt;</code>, with duplicates detected.</li>
+                            </ol>
+                        </section>
+                        <section class="method">
+                            <h3 class="method__title">② Rename in place <span class="method__tag method__tag--warn">edits your files</span></h3>
+                            <p class="method__what">A quick spreadsheet for a folder you own: fill in tracking number, revision, status and title, and rename the files on disk.</p>
+                            <ol class="method__steps">
+                                <li>Click <strong>Use Local Directory</strong> (top bar) to open a folder.</li>
+                                <li>Switch the toggle to <strong>Rename in place</strong>.</li>
+                                <li>Edit cells (or paste columns from Excel); names already in ZDDC format are parsed automatically and validated as you type.</li>
+                                <li><strong>Save All</strong> renames the files where they sit.</li>
+                            </ol>
+                        </section>
+                    </div>
 
                     <!-- Browser Compatibility Warning -->
                     <div id="browserWarning" class="browser-warning hidden">
@@ -148,16 +220,7 @@
                         <p>This application requires the File System Access API, available only in Chromium-based browsers (Chrome, Edge, Brave, Opera).</p>
                     </div>
 
-                    <ul class="welcome-list">
-                        <li>Files already named to ZDDC format are parsed automatically</li>
-                        <li>Edit cells directly, or copy columns to and from Excel</li>
-                        <li>Real-time validation highlights non-compliant names</li>
-                        <li>Rename one file or all modified files at once</li>
-                    </ul>
-
-                    <p>Click <strong>Use Local Directory</strong> to begin.</p>
-
-                    <p class="note">This application works entirely in your browser. No data is transmitted to any server.</p>
+                    <p class="welcome__note">Everything runs in your browser — no files are uploaded. Tip: if your folder lives on OneDrive/SharePoint, set it to <em>“Always keep on this device”</em> first for a much faster scan.</p>
                 </div>
             </div>
         </div>

playwright.config.js

@@ -51,6 +51,10 @@ export default defineConfig({
       name: 'classifier',
       testMatch: 'classifier.spec.js',
     },
+    {
+      name: 'classify',
+      testMatch: 'classify.spec.js',
+    },
     {
       name: 'browse',
       testMatch: 'browse.spec.js',

shared/toast.css

@@ -3,23 +3,75 @@
    with tool-local .toast classes; the old classifier rules can stay
    alongside until this file is concatenated above them in the build. */
 
-.zddc-toast {
+/* Toast STACK — bottom-right, newest at the bottom. The container is
+   click-through (pointer-events:none) so the gaps don't block the page; each
+   toast + button re-enables pointer events. */
+.zddc-toasts {
     position: fixed;
-    bottom: 2rem;
-    right: 2rem;
+    bottom: 1.5rem;
+    right: 1.5rem;
+    z-index: 9000;
+    display: flex;
+    flex-direction: column;
+    align-items: flex-end;
+    gap: 0.5rem;
+    max-height: calc(100vh - 3rem);
+    overflow-y: auto;
+    pointer-events: none;
+}
+
+/* "Clear all" — shown above the stack when 2+ toasts are present. */
+.zddc-toasts__clear {
+    pointer-events: auto;
+    align-self: flex-end;
     background: var(--bg);
     color: var(--text);
-    padding: 0.875rem 1.25rem;
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    padding: 0.2rem 0.6rem;
+    font-size: 0.78rem;
+    cursor: pointer;
+}
+.zddc-toasts__clear:hover { background: var(--bg-secondary, rgba(0, 0, 0, 0.05)); }
+
+.zddc-toast {
+    position: relative;
+    pointer-events: auto;
+    background: var(--bg);
+    color: var(--text);
+    padding: 0.7rem 1.7rem 0.7rem 1rem; /* room for the × at top-right */
     border-radius: var(--radius);
     border: 1px solid var(--border);
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-    z-index: 9000;
-    max-width: 400px;
+    max-width: 420px;
     font-size: 0.875rem;
-    cursor: pointer;
     animation: zddc-toast-in 0.3s ease-out;
 }
 
+/* Message text — selectable + copyable; long/multi-line errors wrap. */
+.zddc-toast__msg {
+    user-select: text;
+    -webkit-user-select: text;
+    cursor: text;
+    white-space: pre-wrap;
+    word-break: break-word;
+}
+
+/* Per-toast dismiss. */
+.zddc-toast__close {
+    position: absolute;
+    top: 0.2rem;
+    right: 0.35rem;
+    border: none;
+    background: transparent;
+    color: var(--text-muted, #888);
+    font-size: 1.15rem;
+    line-height: 1;
+    cursor: pointer;
+    padding: 0 0.15rem;
+}
+.zddc-toast__close:hover { color: var(--text); }
+
 .zddc-toast--success { border-left: 4px solid var(--success); }
 .zddc-toast--error   { border-left: 4px solid var(--danger); }
 .zddc-toast--info    { border-left: 4px solid var(--info); }

shared/toast.js

@@ -1,72 +1,120 @@
 // shared/toast.js — non-blocking notification helper available to every
-// tool via window.zddc.toast(msg, level, opts). Originated as classifier's
-// local showToast (classifier/js/excel.js); promoted here so tools that
-// today use alert() or silent console.error can switch to a uniform
-// non-blocking surface.
+// tool via window.zddc.toast(msg, level, opts).
+//
+// Toasts collect in a bottom-right STACK. Error/warning toasts are STICKY —
+// they stay until the user dismisses them (per-toast × or a "Clear all"
+// button) so the message can be read, selected, and copied while
+// troubleshooting. info/success toasts auto-dismiss. The message text is
+// always selectable.
 //
 // Usage:
-//   window.zddc.toast('Saved.', 'success');
-//   window.zddc.toast('Could not load: ' + err.message, 'error');
+//   window.zddc.toast('Saved.', 'success');               // auto-dismiss
+//   window.zddc.toast('Could not load: ' + e.message, 'error');  // sticky
 //   window.zddc.toast('Note', 'info', { durationMs: 3000 });
+//   window.zddc.toast('Heads up', 'info', { durationMs: 0 });    // force sticky
 //
 // Levels: 'info' (default) | 'success' | 'warning' | 'error'.
-// Each tool may also expose app.notify(msg, level) as a thin wrapper —
-// see ARCHITECTURE.md for the convention.
 (function () {
     'use strict';
 
     if (!window.zddc) window.zddc = {};
-    // Don't overwrite if a tool defined its own first.
     if (typeof window.zddc.toast === 'function') return;
 
     var DEFAULT_DURATION_MS = 5000;
     var FADE_MS = 300;
+    // Levels that persist until the user dismisses them (troubleshooting).
+    var STICKY = { error: true, warning: true };
+
+    function container() {
+        var c = document.getElementById('zddc-toasts');
+        if (c) return c;
+        c = document.createElement('div');
+        c.id = 'zddc-toasts';
+        c.className = 'zddc-toasts';
+        document.body.appendChild(c);
+        return c;
+    }
+
+    // Show/hide a "Clear all" control when 2+ toasts are stacked.
+    function refreshClearAll(c) {
+        var bar = c.querySelector('.zddc-toasts__clear');
+        var count = c.querySelectorAll('.zddc-toast').length;
+        if (count >= 2) {
+            if (!bar) {
+                bar = document.createElement('button');
+                bar.type = 'button';
+                bar.className = 'zddc-toasts__clear';
+                bar.textContent = 'Clear all';
+                bar.addEventListener('click', function () {
+                    var all = c.querySelectorAll('.zddc-toast');
+                    for (var i = 0; i < all.length; i++) dismiss(all[i]);
+                });
+                c.insertBefore(bar, c.firstChild);
+            }
+        } else if (bar) {
+            bar.remove();
+        }
+    }
+
+    function dismiss(el) {
+        if (el._dismissed) return;
+        el._dismissed = true;
+        if (el._timer) clearTimeout(el._timer);
+        el.classList.add('zddc-toast--fade');
+        setTimeout(function () {
+            if (el.parentNode) el.parentNode.removeChild(el);
+            refreshClearAll(container());
+        }, FADE_MS);
+    }
 
     function toast(message, level, opts) {
         opts = opts || {};
         var lvl = (level === 'success' || level === 'error' ||
                    level === 'warning') ? level : 'info';
-
-        // Single-toast policy: dismiss any existing toast immediately
-        // so the new one is always the most recent. Matches the
-        // classifier's prior behavior and avoids stack-of-toasts UX.
-        var existing = document.querySelector('.zddc-toast');
-        if (existing) existing.remove();
+        var c = container();
 
         var el = document.createElement('div');
         el.className = 'zddc-toast zddc-toast--' + lvl;
         // ARIA: errors get assertive (interrupts SR queue), others polite.
         el.setAttribute('role', lvl === 'error' ? 'alert' : 'status');
         el.setAttribute('aria-live', lvl === 'error' ? 'assertive' : 'polite');
-        el.textContent = message == null ? '' : String(message);
-        document.body.appendChild(el);
 
-        var dur = typeof opts.durationMs === 'number' ?
-                  opts.durationMs : DEFAULT_DURATION_MS;
-        var timer = setTimeout(function () {
-            el.classList.add('zddc-toast--fade');
-            setTimeout(function () {
-                if (el.parentNode) el.parentNode.removeChild(el);
-            }, FADE_MS);
-        }, dur);
+        // Selectable, copyable message text (its own element so clicking to
+        // select doesn't dismiss the toast — only the × does).
+        var msg = document.createElement('span');
+        msg.className = 'zddc-toast__msg';
+        msg.textContent = message == null ? '' : String(message);
+        el.appendChild(msg);
 
-        // Click-to-dismiss. Useful for sticky errors the user wants gone.
-        el.addEventListener('click', function () {
-            clearTimeout(timer);
-            if (el.parentNode) el.parentNode.removeChild(el);
-        });
+        var close = document.createElement('button');
+        close.type = 'button';
+        close.className = 'zddc-toast__close';
+        close.setAttribute('aria-label', 'Dismiss');
+        close.textContent = '×';
+        close.addEventListener('click', function () { dismiss(el); });
+        el.appendChild(close);
 
+        c.appendChild(el);
+
+        // Sticky (error/warning, or opts.durationMs === 0) persists; otherwise
+        // auto-dismiss after the (overridable) duration.
+        var sticky = opts.durationMs === 0 ||
+            (typeof opts.durationMs !== 'number' && STICKY[lvl]);
+        if (!sticky) {
+            var dur = typeof opts.durationMs === 'number'
+                ? opts.durationMs : DEFAULT_DURATION_MS;
+            el._timer = setTimeout(function () { dismiss(el); }, dur);
+        }
+
+        refreshClearAll(c);
         return el;
     }
 
     window.zddc.toast = toast;
 
-    // Route window.alert() calls into the toast helper. Every tool has
-    // accumulated some `alert(...)` sites for error reporting; rather
-    // than touch each one, intercept globally so they're non-blocking
-    // and ARIA-announced consistently. Native alert is preserved on
-    // window.alertNative for the rare case where a truly modal block
-    // is needed (e.g. before navigating away with unsaved changes).
+    // Route window.alert() into the toast helper (non-blocking, ARIA-announced,
+    // consistent). Native alert preserved on window.alertNative. alert() maps
+    // to an error toast (sticky) since that's its usual purpose.
     if (typeof window.alert === 'function' && !window.alertNative) {
         window.alertNative = window.alert.bind(window);
         window.alert = function (msg) {

tests/classify.spec.js

@@ -0,0 +1,619 @@
+/**
+ * Tests for the classifier "Classify & Copy" state model
+ * (classifier/js/classify.js) — the pure derive/assignment logic.
+ *
+ * Runs against the compiled classifier/dist/classifier.html, driving
+ * window.app.modules.classify via page.evaluate. No File System Access API is
+ * needed: synthetic file objects ({folderPath, originalFilename, extension})
+ * carry everything deriveTarget consults. Drag-and-drop and the actual copy
+ * stay manual (Playwright can't drive the directory picker).
+ *
+ * Build first:  sh classifier/build.sh
+ */
+
+import { test, expect } from '@playwright/test';
+import * as path from 'path';
+
+const PAGE = 'file://' + path.resolve('classifier/dist/classifier.html');
+
+test.beforeEach(async ({ page }) => {
+    await page.goto(PAGE, { waitUntil: 'load' });
+    const ok = await page.evaluate(() => !!(window.app && window.app.modules && window.app.modules.classify));
+    expect(ok).toBe(true);
+    await page.evaluate(() => {
+        window.app.modules.classify.reset();
+        // No directory is opened in these tests; dismiss the welcome overlay so
+        // it doesn't intercept clicks on the in-pane controls.
+        const w = document.getElementById('welcomeScreen');
+        if (w) w.classList.add('hidden');
+    });
+});
+
+// Build a tracking chain of folders and place one file in the deepest;
+// return the derived target.
+async function deriveInTracking(page, segments, file) {
+    return page.evaluate(({ segments, file }) => {
+        const c = window.app.modules.classify;
+        let parent = null;
+        for (const name of segments) parent = c.addTrackingNode(parent, name);
+        const key = c.srcKeyForFile(file);
+        c.place([key], parent, 'tracking');
+        return c.deriveTarget(file);
+    }, { segments, file });
+}
+
+const FILE = { folderPath: 'Root/Sub', originalFilename: 'Foundation Plan', extension: 'pdf' };
+
+test('tracking: ancestors join with "-", parent leaf = REV (STATUS), title from name', async ({ page }) => {
+    const d = await deriveInTracking(page, ['ACME-PROJ', 'MECH', '0001', 'A (IFR)'], FILE);
+    expect(d.tracking).toBe('ACME-PROJ-MECH-0001');
+    expect(d.revision).toBe('A');
+    expect(d.status).toBe('IFR');
+    expect(d.title).toBe('Foundation Plan');
+    expect(d.filename).toBe('ACME-PROJ-MECH-0001_A (IFR) - Foundation Plan.pdf');
+    expect(d.trackingLeaf).toBe(true);
+});
+
+test('tracking: a single full-number folder also works', async ({ page }) => {
+    const d = await deriveInTracking(page, ['ACME-PROJ-MECH-0001', 'B (IFC)'], FILE);
+    expect(d.tracking).toBe('ACME-PROJ-MECH-0001');
+    expect(d.revision).toBe('B');
+    expect(d.status).toBe('IFC');
+    expect(d.filename).toBe('ACME-PROJ-MECH-0001_B (IFC) - Foundation Plan.pdf');
+});
+
+test('tracking: parked in an intermediate (non-leaf) folder is flagged incomplete', async ({ page }) => {
+    const d = await page.evaluate((file) => {
+        const c = window.app.modules.classify;
+        const proj = c.addTrackingNode(null, 'ACME-PROJ');
+        const mech = c.addTrackingNode(proj, 'MECH');
+        c.addTrackingNode(mech, '0001');          // child exists → MECH is not a leaf
+        const key = c.srcKeyForFile(file);
+        c.place([key], mech, 'tracking');         // file parked at MECH
+        return c.deriveTarget(file);
+    }, FILE);
+    expect(d.trackingLeaf).toBe(false);
+    expect(d.errors.join(' ')).toContain('leaf');
+    expect(d.complete).toBe(false);
+});
+
+test('tracking: unknown status code is reported', async ({ page }) => {
+    const d = await deriveInTracking(page, ['ACME', 'Z (BOGUS)'], FILE);
+    expect(d.status).toBe('BOGUS');
+    expect(d.errors.join(' ')).toContain('unknown status');
+    expect(d.complete).toBe(false);
+});
+
+test('tracking: leaf with no "(STATUS)" parens is flagged', async ({ page }) => {
+    const d = await deriveInTracking(page, ['ACME', '0001'], FILE);
+    expect(d.status).toBe('');
+    expect(d.filename).toBe('');                  // formatFilename needs a status
+    expect(d.errors.join(' ')).toContain('STATUS');
+});
+
+test('title: original ZDDC name reuses its title; titleOverride wins', async ({ page }) => {
+    const zddcFile = { folderPath: 'Root', originalFilename: 'X-1_A (IFR) - Real Title', extension: 'pdf' };
+    const def = await page.evaluate((f) => window.app.modules.classify.defaultTitle(f), zddcFile);
+    expect(def).toBe('Real Title');
+
+    const overridden = await page.evaluate((f) => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile(f);
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME'), 'A (IFR)');
+        c.place([key], leaf, 'tracking');
+        c.setTitleOverride(key, 'Custom Title');
+        return c.deriveTarget(f);
+    }, FILE);
+    expect(overridden.title).toBe('Custom Title');
+    expect(overridden.filename).toContain(' - Custom Title.pdf');
+});
+
+test('transmittal: party/slot/bin → output path; full target composes', async ({ page }) => {
+    const d = await page.evaluate((file) => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile(file);
+        // axis 1
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        c.place([key], leaf, 'tracking');
+        // axis 2
+        const party = c.addParty('ClientCorp');
+        const bin = c.addTransmittalBin(party, 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        c.place([key], bin, 'transmittal');
+        return { d: c.deriveTarget(file), binName: c.getNode(bin).name };
+    }, FILE);
+    expect(d.binName).toBe('2026-03-14_ClientCorp-TRN-0007 (---) - Transmittal');
+    expect(d.d.party).toBe('ClientCorp');
+    expect(d.d.slot).toBe('received');
+    expect(d.d.outPath).toBe('ClientCorp/received/2026-03-14_ClientCorp-TRN-0007 (---) - Transmittal');
+    expect(d.d.complete).toBe(true);
+});
+
+test('exclude clears placements and reports excluded state', async ({ page }) => {
+    const r = await page.evaluate((file) => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile(file);
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME'), 'A (IFR)');
+        c.place([key], leaf, 'tracking');
+        c.setExcluded([key], true);
+        return { state: c.fileState(file), d: c.deriveTarget(file) };
+    }, FILE);
+    expect(r.state).toBe('excluded');
+    expect(r.d.excluded).toBe(true);
+});
+
+// ── Phase 2: mode toggle + target-tree rendering (UI) ──────────────────────
+
+test('mode switch swaps the spreadsheet pane for the target pane', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    expect(await page.locator('#targetPane').isHidden()).toBe(false);
+    expect(await page.locator('#spreadsheetPane').isHidden()).toBe(true);
+    await page.click('#modeRenameBtn');
+    expect(await page.locator('#targetPane').isHidden()).toBe(true);
+    expect(await page.locator('#spreadsheetPane').isHidden()).toBe(false);
+});
+
+test('target tree renders structure and tabs switch', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const acme = c.addTrackingNode(null, 'ACME-PROJ');
+        c.addTrackingNode(acme, 'A (IFR)');
+        const party = c.addParty('ClientCorp');
+        c.addTransmittalBin(party, 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+    });
+    // Tracking panel visible by default with the nodes rendered.
+    await expect(page.locator('#trackingTree .tnode__name', { hasText: 'ACME-PROJ' })).toBeVisible();
+    await expect(page.locator('#trackingTree .tnode--leaf .tnode__name', { hasText: 'A (IFR)' })).toBeVisible();
+    // Switch to transmittal tab.
+    await page.click('#transmittalTab');
+    expect(await page.locator('#transmittalPanel').isHidden()).toBe(false);
+    await expect(page.locator('#transmittalTree .tnode--bin .tnode__name', { hasText: 'ClientCorp-TRN-0007' })).toBeVisible();
+});
+
+test('"+ Root folder" button (prompt) parses a name into nested levels', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    page.once('dialog', (d) => d.accept('CPO-0001_0 (IFU)'));
+    await page.click('#addTrackingRootBtn');
+    // "CPO-0001_0 (IFU)" → CPO / 0001 / 0 (IFU) (three nested levels).
+    await expect(page.locator('#trackingTree .tnode__name', { hasText: 'CPO' })).toBeVisible();
+    await expect(page.locator('#trackingTree .tnode__name', { hasText: '0001' })).toBeVisible();
+    await expect(page.locator('#trackingTree .tnode__name', { hasText: '0 (IFU)' })).toBeVisible();
+});
+
+// ── Phase 3: drag-and-drop assignment (drop handler) ───────────────────────
+
+test('dropping a file onto a tracking leaf assigns it', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        window.app.modules.targetTree.render();
+        const row = document.querySelector('#trackingTree .tnode--leaf .tnode__row');
+        const key = 'Sub/foundation.pdf';
+        window.app.modules.dnd.setDrag([key]);
+        row.dispatchEvent(new Event('drop', { bubbles: true, cancelable: true }));
+        return { assigned: c.assignmentFor(key).trackingNodeId, leaf };
+    });
+    expect(r.assigned).toBe(r.leaf);
+});
+
+test('dropping onto a transmittal bin assigns; dropping on a party row does not', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    await page.click('#transmittalTab');
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const party = c.addParty('ClientCorp');
+        const bin = c.addTransmittalBin(party, 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        window.app.modules.targetTree.render();
+        const key = 'Sub/foundation.pdf';
+
+        // Drop on the bin → assigned.
+        const binRow = document.querySelector('#transmittalTree .tnode--bin .tnode__row');
+        window.app.modules.dnd.setDrag([key]);
+        binRow.dispatchEvent(new Event('drop', { bubbles: true, cancelable: true }));
+        const afterBin = c.assignmentFor(key).transmittalNodeId;
+
+        // Reset, then drop on the party row → ignored (only bins are targets).
+        c.place([key], null, 'transmittal');
+        const partyRow = document.querySelector('#transmittalTree .tnode--party > .tnode__row');
+        window.app.modules.dnd.setDrag([key]);
+        partyRow.dispatchEvent(new Event('drop', { bubbles: true, cancelable: true }));
+        const afterParty = c.assignmentFor(key).transmittalNodeId;
+
+        return { afterBin, bin, afterParty };
+    });
+    expect(r.afterBin).toBe(r.bin);
+    expect(r.afterParty).toBe(null);
+});
+
+// ── Phase 4: left-tree markers, exclude, cross-tree find ───────────────────
+
+// Inject a synthetic scanned tree (no FS Access needed) and render it.
+async function withSourceTree(page) {
+    await page.click('#modeClassifyBtn');
+    await page.evaluate(() => {
+        window.app.folderTree = [{
+            name: 'Root', path: 'Root', expanded: true, scanState: 'done',
+            files: [{ originalFilename: 'Foundation Plan', extension: 'pdf', folderPath: 'Root' }],
+            children: [], fileCount: 1, subdirCount: 0, runFiles: 1, runDirs: 0,
+        }];
+        window.app.modules.tree.render();
+    });
+}
+
+test('source file rows render with a state dot in classify mode', async ({ page }) => {
+    await withSourceTree(page);
+    await expect(page.locator('#folderTree .file-item .file-name', { hasText: 'Foundation Plan.pdf' })).toBeVisible();
+    await expect(page.locator('#folderTree .file-item .cl-dot--none')).toBeVisible();
+});
+
+test('classify: single-click a source file triggers preview', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const previewed = await page.evaluate(() => {
+        let got = null;
+        window.app.modules.preview.previewFile = (f) => { got = f.originalFilename; };  // capture, skip popup
+        window.app.folderTree = [{
+            name: 'Root', path: 'Root', expanded: true, scanState: 'done',
+            files: [{ originalFilename: 'Foundation Plan', extension: 'pdf', folderPath: 'Root' }], children: [],
+        }];
+        window.app.modules.tree.render();
+        document.querySelector('#folderTree .file-item').click();
+        return got;
+    });
+    expect(previewed).toBe('Foundation Plan');
+});
+
+test('classify: a folder with files but no subfolders is expandable (drag source)', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    await page.evaluate(() => {
+        window.app.folderTree = [{
+            name: 'Leaf', path: 'Leaf', expanded: false, scanState: 'done',
+            files: [{ originalFilename: 'x', extension: 'pdf', folderPath: 'Leaf' }], children: [],
+        }];
+        window.app.modules.tree.render();
+    });
+    const toggle = page.locator('#folderTree .folder-item .folder-toggle').first();
+    await expect(toggle).toHaveText('▶');          // file-only folder still gets an expand arrow
+    await toggle.click();
+    await expect(page.locator('#folderTree .file-item .file-name', { hasText: 'x.pdf' })).toBeVisible();
+});
+
+test('placing a file turns its dot (and the folder aggregate) done', async ({ page }) => {
+    await withSourceTree(page);
+    await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const realKey = c.srcKeyForFile({ originalFilename: 'Foundation Plan', extension: 'pdf', folderPath: 'Root' });
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        const bin = c.addTransmittalBin(c.addParty('ClientCorp'), 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        c.place([realKey], leaf, 'tracking');
+        c.place([realKey], bin, 'transmittal');
+        window.app.modules.tree.render();
+    });
+    await expect(page.locator('#folderTree .file-item .cl-dot--done')).toBeVisible();
+    await expect(page.locator('#folderTree .folder-item .cl-dot--done')).toBeVisible();
+});
+
+test('context-menu exclude marks the file excluded', async ({ page }) => {
+    await withSourceTree(page);
+    await page.locator('#folderTree .file-item').click({ button: 'right' });
+    await expect(page.locator('.cl-menu')).toBeVisible();
+    await page.locator('.cl-menu__item', { hasText: 'Exclude from copy' }).click();
+    await expect(page.locator('#folderTree .file-item.excluded')).toBeVisible();
+    const excluded = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile({ originalFilename: 'Foundation Plan', extension: 'pdf', folderPath: 'Root' });
+        return c.getAssignment(key).excluded;
+    });
+    expect(excluded).toBe(true);
+});
+
+test('cross-tree reveal: source→target switches to the placed axis', async ({ page }) => {
+    await withSourceTree(page);
+    const ok = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile({ originalFilename: 'Foundation Plan', extension: 'pdf', folderPath: 'Root' });
+        const bin = c.addTransmittalBin(c.addParty('ClientCorp'), 'issued', { date: '2026-03-14', type: 'SUB', seq: '0001' });
+        c.place([key], bin, 'transmittal');
+        window.app.modules.targetTree.reveal(key);     // should switch to transmittal tab
+        return !document.getElementById('transmittalPanel').hidden;
+    });
+    expect(ok).toBe(true);
+});
+
+// ── Phase 5: copy-out engine + duplicate detection (mock FS handles) ───────
+
+test('copy: writes the file, skips an identical re-copy, flags a differing target', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const res = await page.evaluate(async () => {
+        const c = window.app.modules.classify, copy = window.app.modules.copy;
+        const store = {};
+        const fileHandleFor = (full) => ({
+            getFile: async () => new File([store[full] != null ? store[full] : ''], full.split('/').pop()),
+            createWritable: async () => ({ write: async (d) => { store[full] = (d && d.text) ? await d.text() : d; }, close: async () => { } }),
+        });
+        const mockDir = (prefix) => ({
+            name: prefix || 'out',
+            getDirectoryHandle: async (name) => mockDir((prefix ? prefix + '/' : '') + name),
+            getFileHandle: async (name, opts) => {
+                const full = (prefix ? prefix + '/' : '') + name;
+                if (!opts || !opts.create) { if (!(full in store)) { const e = new Error('NF'); e.name = 'NotFoundError'; throw e; } }
+                return fileHandleFor(full);
+            },
+        });
+        const srcFile = (name, content) => {
+            const p = name.split('.'); const ext = p.length > 1 ? p.pop() : ''; const stem = p.join('.');
+            return { originalFilename: stem, extension: ext, folderPath: 'Root', handle: { getFile: async () => new File([content], name) } };
+        };
+        const f = srcFile('foundation.pdf', 'AAA');
+        window.app.folderTree = [{ name: 'Root', path: 'Root', expanded: true, scanState: 'done', files: [f], children: [], runFiles: 1 }];
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        const bin = c.addTransmittalBin(c.addParty('ClientCorp'), 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        const key = c.srcKeyForFile(f);
+        c.place([key], leaf, 'tracking'); c.place([key], bin, 'transmittal');
+
+        const out = mockDir('');
+        const first = await copy.copyTo(out, copy.plan());
+        const second = await copy.copyTo(out, copy.plan());     // identical → skipped
+        const tkey = Object.keys(store)[0];
+        store[tkey] = 'DIFFERENT';                              // tamper target
+        const third = await copy.copyTo(out, copy.plan());      // differs → left alone
+        return { firstCopied: first.copied, secondSkipped: second.skipped, thirdDiffer: third.differ, keys: Object.keys(store) };
+    });
+    expect(res.firstCopied).toBe(1);
+    expect(res.secondSkipped).toBe(1);
+    expect(res.thirdDiffer).toBe(1);
+    expect(res.keys.some((k) => k.endsWith('ClientCorp/received/2026-03-14_ClientCorp-TRN-0007 (---) - Transmittal/ACME-MECH-0001_A (IFR) - foundation.pdf'))).toBe(true);
+});
+
+test('copy: two sources mapping to the same output path are a conflict', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const conflicts = await page.evaluate(() => {
+        const c = window.app.modules.classify, copy = window.app.modules.copy;
+        const srcFile = (name, folder) => {
+            const p = name.split('.'); const ext = p.length > 1 ? p.pop() : ''; const stem = p.join('.');
+            return { originalFilename: stem, extension: ext, folderPath: folder, handle: { getFile: async () => new File(['x'], name) } };
+        };
+        const f1 = srcFile('plan.pdf', 'Root/a');
+        const f2 = srcFile('plan.pdf', 'Root/b');   // same name, different folder → same derived output
+        window.app.folderTree = [{
+            name: 'Root', path: 'Root', expanded: true, scanState: 'done', files: [],
+            children: [
+                { name: 'a', path: 'Root/a', files: [f1], children: [] },
+                { name: 'b', path: 'Root/b', files: [f2], children: [] },
+            ],
+        }];
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        const bin = c.addTransmittalBin(c.addParty('ClientCorp'), 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        c.place([c.srcKeyForFile(f1)], leaf, 'tracking'); c.place([c.srcKeyForFile(f1)], bin, 'transmittal');
+        c.place([c.srcKeyForFile(f2)], leaf, 'tracking'); c.place([c.srcKeyForFile(f2)], bin, 'transmittal');
+        return copy.conflictsIn(copy.plan()).conflicts.length;
+    });
+    expect(conflicts).toBe(1);
+});
+
+// ── Workspaces: snapshot, persistence, copy-from-snapshot ──────────────────
+
+test('snapshot: serialize + rebuild preserves structure, marks done, drops handles', async ({ page }) => {
+    const r = await page.evaluate(() => {
+        const sc = window.app.modules.scanner;
+        window.app.folderTree = [{
+            name: 'Root', path: 'Root', expanded: true, scanState: 'done',
+            files: [{ originalFilename: 'a', extension: 'pdf', folderPath: 'Root' }],
+            children: [{
+                name: 'sub', path: 'Root/sub', scanState: 'done',
+                files: [{ originalFilename: 'b', extension: 'txt', folderPath: 'Root/sub' }], children: [],
+            }],
+        }];
+        const json = JSON.stringify(sc.snapshotTree());
+        window.app.folderTree = [];
+        sc.loadSnapshot(JSON.parse(json));
+        const root = window.app.folderTree[0];
+        return {
+            rootName: root.name, done: root.scanState === 'done', runFiles: root.runFiles,
+            subFile: root.children[0].files[0].originalFilename,
+            subPath: root.children[0].files[0].folderPath,
+            handleNull: root.children[0].files[0].handle === null,
+        };
+    });
+    expect(r.rootName).toBe('Root');
+    expect(r.done).toBe(true);
+    expect(r.runFiles).toBe(2);
+    expect(r.subFile).toBe('b');
+    expect(r.subPath).toBe('Root/sub');
+    expect(r.handleNull).toBe(true);
+});
+
+test('scan: resume scans only the pending folders from a snapshot', async ({ page }) => {
+    const r = await page.evaluate(async () => {
+        const sc = window.app.modules.scanner;
+        // Snapshot: Root (done) with a child 'sub' left pending.
+        sc.loadSnapshot([{ n: 'Root', p: 'Root', c: [{ n: 'sub', p: 'Root/sub', s: 'pending' }] }]);
+        // Mock root handle: Root/sub contains one file.
+        const subDir = { kind: 'directory', name: 'sub', values: async function* () { yield { kind: 'file', name: 'x.pdf' }; } };
+        const root = {
+            kind: 'directory', name: 'Root',
+            getDirectoryHandle: async (n) => { if (n === 'sub') return subDir; const e = new Error('NF'); e.name = 'NotFoundError'; throw e; },
+        };
+        window.app.rootHandle = root;
+        const did = await sc.resumeScan(root);
+        const sub = window.app.folderTree[0].children[0];
+        return { did, subState: sub.scanState, subFiles: sub.files.length, name: sub.files[0] && sub.files[0].originalFilename };
+    });
+    expect(r.did).toBe(true);
+    expect(r.subState).toBe('done');
+    expect(r.subFiles).toBe(1);
+    expect(r.name).toBe('x');
+});
+
+test('persist: workspace put / list / get / delete round-trip', async ({ page }) => {
+    const r = await page.evaluate(async () => {
+        const P = window.app.modules.persist;
+        const id = 'test-ws-1';
+        await P.putWorkspace(
+            { id, name: 'WS', rootName: 'Root', createdAt: 1, updatedAt: 2, summary: { files: 3, done: 1, excluded: 0 } },
+            { id, rootHandle: null, tree: [{ n: 'Root', p: 'Root' }], classify: { assignments: {}, trackingTree: [], transmittalTree: [] } });
+        const meta = (await P.listWorkspaces()).filter((w) => w.id === id)[0];
+        const data = await P.getWorkspace(id);
+        await P.deleteWorkspace(id);
+        const goneAfter = (await P.listWorkspaces()).filter((w) => w.id === id).length;
+        return { name: meta && meta.name, files: meta && meta.summary.files, treeLen: data && data.tree.length, goneAfter };
+    });
+    expect(r.name).toBe('WS');
+    expect(r.files).toBe(3);
+    expect(r.treeLen).toBe(1);
+    expect(r.goneAfter).toBe(0);
+});
+
+test('persist: classify-only autosave preserves the stored snapshot', async ({ page }) => {
+    const r = await page.evaluate(async () => {
+        const P = window.app.modules.persist;
+        const id = 'test-ws-2';
+        await P.putWorkspace({ id, name: 'A', rootName: 'R', createdAt: 1, updatedAt: 1, summary: { files: 1, done: 0, excluded: 0 } },
+            { id, rootHandle: null, tree: [{ n: 'R', p: 'R' }], classify: {} });
+        await P.putWorkspace({ id, name: 'A', rootName: 'R', createdAt: 1, updatedAt: 2, summary: { files: 1, done: 1, excluded: 0 } },
+            { id, classify: { assignments: { x: {} } } });   // no tree → must preserve
+        const data = await P.getWorkspace(id);
+        await P.deleteWorkspace(id);
+        return { treePreserved: !!(data && data.tree && data.tree.length === 1), hasClassify: !!(data && data.classify.assignments) };
+    });
+    expect(r.treePreserved).toBe(true);
+    expect(r.hasClassify).toBe(true);
+});
+
+test('copy: snapshot files (no handle) resolve from the workspace root', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const res = await page.evaluate(async () => {
+        const c = window.app.modules.classify, copy = window.app.modules.copy;
+        const srcStore = { 'Sub/foundation.pdf': 'AAA' };
+        const mkSrcDir = (prefix) => ({
+            name: prefix || 'Root',
+            getDirectoryHandle: async (n) => mkSrcDir((prefix ? prefix + '/' : '') + n),
+            getFileHandle: async (n) => {
+                const full = (prefix ? prefix + '/' : '') + n;
+                if (!(full in srcStore)) { const e = new Error('NF'); e.name = 'NotFoundError'; throw e; }
+                return { getFile: async () => new File([srcStore[full]], n) };
+            },
+            queryPermission: async () => 'granted', requestPermission: async () => 'granted',
+        });
+        window.app.rootHandle = mkSrcDir('');
+        const f = { originalFilename: 'foundation', extension: 'pdf', folderPath: 'Root/Sub', handle: null };
+        window.app.folderTree = [{ name: 'Root', path: 'Root', files: [], children: [{ name: 'Sub', path: 'Root/Sub', files: [f], children: [] }] }];
+        const leaf = c.addTrackingNode(c.addTrackingNode(null, 'ACME-MECH-0001'), 'A (IFR)');
+        const bin = c.addTransmittalBin(c.addParty('ClientCorp'), 'received', { date: '2026-03-14', type: 'TRN', seq: '0007' });
+        c.place([c.srcKeyForFile(f)], leaf, 'tracking'); c.place([c.srcKeyForFile(f)], bin, 'transmittal');
+
+        const outStore = {};
+        const mkOut = (prefix) => ({
+            name: prefix || 'out',
+            getDirectoryHandle: async (n) => mkOut((prefix ? prefix + '/' : '') + n),
+            getFileHandle: async (n, opts) => {
+                const full = (prefix ? prefix + '/' : '') + n;
+                if (!opts || !opts.create) { if (!(full in outStore)) { const e = new Error('NF'); e.name = 'NotFoundError'; throw e; } }
+                return {
+                    getFile: async () => new File([outStore[full] != null ? outStore[full] : ''], n),
+                    createWritable: async () => ({ write: async (d) => { outStore[full] = (d && d.text) ? await d.text() : d; }, close: async () => { } }),
+                };
+            },
+        });
+        const s = await copy.copyTo(mkOut(''), copy.plan());
+        return { copied: s.copied, content: Object.values(outStore)[0], wrote: Object.keys(outStore).some((k) => k.endsWith('foundation.pdf')) };
+    });
+    expect(res.copied).toBe(1);
+    expect(res.wrote).toBe(true);
+    expect(res.content).toBe('AAA');
+});
+
+test('deleting a tracking node clears the files placed in it', async ({ page }) => {
+    const after = await page.evaluate((file) => {
+        const c = window.app.modules.classify;
+        const key = c.srcKeyForFile(file);
+        const acme = c.addTrackingNode(null, 'ACME');
+        const leaf = c.addTrackingNode(acme, 'A (IFR)');
+        c.place([key], leaf, 'tracking');
+        c.deleteNode(acme);                       // removes leaf too
+        return c.fileState(file);
+    }, FILE);
+    expect(after).toBe('none');
+});
+
+test('expandFolderPattern: alternation, zero-padded ranges, cartesian product', async ({ page }) => {
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        return {
+            plain: c.expandFolderPattern('Plain'),
+            alt: c.expandFolderPattern('A-{PM,EL,EM}'),
+            range: c.expandFolderPattern('X-{0001-0002,0005}'),
+            full: c.expandFolderPattern('BMB-187023-{PM,EL,EM}-MOM-{0001-0002,0005}_A (IFR)'),
+            unbalanced: c.expandFolderPattern('Lit-{oops'),
+        };
+    });
+    expect(r.plain).toEqual(['Plain']);
+    expect(r.alt).toEqual(['A-PM', 'A-EL', 'A-EM']);
+    expect(r.range).toEqual(['X-0001', 'X-0002', 'X-0005']);
+    expect(r.full.length).toBe(9);
+    expect(r.full[0]).toBe('BMB-187023-PM-MOM-0001_A (IFR)');
+    expect(r.full).toContain('BMB-187023-EM-MOM-0005_A (IFR)');
+    expect(r.unbalanced).toEqual(['Lit-{oops']); // unbalanced brace kept literal
+});
+
+test('Hide Assigned: hides files dealt-with on the active axis and folders left empty', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const before = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        c.reset();
+        const fA = { originalFilename: 'a1', extension: 'pdf', folderPath: 'A' };
+        window.app.folderTree = [
+            { name: 'A', path: 'A', expanded: true, scanState: 'done', files: [fA], children: [] },
+            { name: 'B', path: 'B', expanded: true, scanState: 'done',
+              files: [{ originalFilename: 'b1', extension: 'pdf', folderPath: 'B' }], children: [] },
+        ];
+        const t = c.addTrackingNode(null, 'TN');     // assign A's file on the tracking axis
+        c.place([c.srcKeyForFile(fA)], t, 'tracking');
+        window.app.modules.tree.render();
+        return document.querySelectorAll('#folderTree .file-item').length;
+    });
+    expect(before).toBe(2);                          // nothing hidden yet
+
+    const after = await page.evaluate(() => {
+        window.app.modules.tree.setHideAssigned(true);
+        return {
+            files: Array.from(document.querySelectorAll('#folderTree .file-item .file-name')).map(e => e.textContent),
+            folderA: !!document.querySelector('#folderTree .folder-item[data-path="A"]'),
+            folderB: !!document.querySelector('#folderTree .folder-item[data-path="B"]'),
+        };
+    });
+    expect(after.folderA).toBe(false);   // A's only file is assigned on the active (tracking) axis → folder hidden
+    expect(after.folderB).toBe(true);    // B still needs a tracking number → stays
+    expect(after.files).toEqual(['b1.pdf']);
+});
+
+test('parseFolderLevels: split by - then a final _ into nested levels', async ({ page }) => {
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        return {
+            three: c.parseFolderLevels('CPO-0001_0 (IFU)'),
+            full: c.parseFolderLevels('BMB-187023-PM-MOM-0001_A (IFR)'),
+            leafOnly: c.parseFolderLevels('A (IFR)'),
+            noRev: c.parseFolderLevels('CPO-0001'),
+        };
+    });
+    expect(r.three).toEqual(['CPO', '0001', '0 (IFU)']);
+    expect(r.full).toEqual(['BMB', '187023', 'PM', 'MOM', '0001', 'A (IFR)']);
+    expect(r.leafOnly).toEqual(['A (IFR)']);
+    expect(r.noRev).toEqual(['CPO', '0001']);
+});
+
+test('add-folder builds a nested chain sharing common ancestors', async ({ page }) => {
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify;
+        c.reset();
+        // Brace-expand then nest: two leaves under shared CPO/000x ancestors.
+        c.expandFolderPattern('CPO-{0001,0002}_0 (IFU)').forEach((nm) =>
+            c.addTrackingPath(null, c.parseFolderLevels(nm)));
+        return JSON.parse(JSON.stringify(c.getTrackingTree(), (k, v) => (k === 'id' ? undefined : v)));
+    });
+    expect(r.length).toBe(1);                                   // one shared CPO root
+    expect(r[0].name).toBe('CPO');
+    expect(r[0].children.map((n) => n.name)).toEqual(['0001', '0002']);
+    expect(r[0].children[0].children[0].name).toBe('0 (IFU)');  // leaf rev under each number
+});

zddc/README.md

@@ -433,8 +433,7 @@ fence is computed by `PolicyChain.VisibleStart`.
 
 The leaf-overrides-ancestor behaviour above is the in-process decider's only
 rule. Federal deployments needing absolute parent denies (NIST AC-6) deploy
-OPA with the bundled `access_federal.rego` (or their own Rego); see
-"External OPA" below.
+OPA with their own Rego; see "External OPA" below.
 
 #### The `inherit:` directive
 
@@ -471,10 +470,10 @@ Behaviour:
   fence; `inherit: false` does not change WORM behaviour. See
   "Canonical-folder behaviour via `.zddc` keys" below.
 
-**Federal posture and `inherit: false`.** The bundled federal Rego at
-`--print-rego=federal` makes ancestor explicit-denies absolute and
-therefore ignores `inherit: false` (allowing a leaf to widen access an
-ancestor refused would defeat NIST AC-6). Operators who need fence-
+**Federal posture and `inherit: false`.** An external OPA policy with
+ancestor-deny-absolute (NIST AC-6) semantics makes ancestor explicit-denies
+absolute and therefore ignores `inherit: false` (allowing a leaf to widen
+access an ancestor refused would defeat NIST AC-6). Operators who need fence-
 style "reset" semantics in a federal-track deployment should not use
 the directive — instead, restructure the tree so the permissive
 ancestor rule never appears.
@@ -927,13 +926,14 @@ have to redo the gap analysis from scratch.
   Identity-source-driven role assignment plumbs through unchanged
   (the upstream proxy still asserts the email; role membership is
   evaluated server-side against the cascade).
-- ~~**Least-privilege bounding** (NIST AC-6)~~ — *closed.* Operators
-  deploy OPA (`ZDDC_OPA_URL`) pointed at the bundled federal Rego
-  (`zddc-server --print-rego=federal`) or their own variant. Under
-  that policy any ancestor explicit-deny is absolute and cannot be
-  overridden by a leaf grant. The in-process Go evaluator implements
-  only the commercial "leaf grants override ancestor denies" rule;
-  federal posture is exclusively the OPA path.
+- ~~**Least-privilege bounding** (NIST AC-6)~~ — *available via the OPA
+  path.* Operators deploy OPA (`ZDDC_OPA_URL`) pointed at their own
+  ancestor-deny-absolute Rego, under which any ancestor explicit-deny is
+  absolute and cannot be overridden by a leaf grant. The in-process Go
+  evaluator implements only the commercial "leaf grants override ancestor
+  denies" rule, and the bundled `--print-rego` skeleton models read-ACL
+  only (fail-closed for writes) — an AC-6 federal policy is the operator's
+  own Rego, not a shipped artifact.
 - **Account lifecycle** (NIST AC-2) — emails as identifiers must tie to
   authoritative sources (PIV cert subject, IdP-managed identity). Required:
   documented integration with at least one IdP supporting federal identity
@@ -1266,56 +1266,47 @@ cache lookup would be.
 
 ### Reference Rego policy
 
-The `--print-rego` flag emits the bundled reference Rego policies. Two
-variants ship:
+The `--print-rego` flag emits the bundled reference Rego **skeleton**:
 
 ```sh
-zddc-server --print-rego                # standard cascade (commercial)
+zddc-server --print-rego                # read-ACL skeleton (fail-closed)
 zddc-server --print-rego=standard       # same
-zddc-server --print-rego=federal        # parent-deny-is-absolute (NIST AC-6)
 ```
 
-The standard variant mirrors internal-mode semantics exactly — leaf-
-level allows can override an ancestor's deny (the cascade's intentional
-delegation property). The federal variant is the strict-least-privilege
-posture: any deny anywhere in the chain is absolute, no leaf-level
-override possible. Federal customers running their own OPA can drop
-the federal Rego in unchanged, or use either as a starting point for
-further customization.
+This skeleton models the **read-ACL cascade only** — glob patterns,
+deny-first-within-a-level, default-deny once any `.zddc` exists, and the
+leaf-allow-overrides-ancestor-deny delegation property. It is **NOT** a
+semantic mirror of the internal Go decider: it does not implement per-verb
+authorization (write/create/delete/admin), WORM zones, `roles:` resolution,
+`inherit:false` fences, or standing config-edit. Because those are
+unmodelled it is **fail-closed** — every non-read action is denied, and an
+elevated admin (`input.user.is_active_admin`) is the only write-capable
+principal. **Treat it as a starting point, not a turnkey policy:** an
+operator relying on external OPA for write authorization must add the
+missing semantics (and, for a NIST AC-6 ancestor-deny-absolute posture,
+write that rule) before granting writes.
 
-Parity is enforced at build time. `zddc/internal/policy/parity_test.go`
-imports the OPA Go module **as a test-only dependency**, evaluates both
-bundled Regos against fixture sets and asserts:
+A build-time guard (`zddc/internal/policy/parity_test.go`,
+`rego_failclosed_test.go`) imports the OPA Go module **as a test-only
+dependency** and asserts the skeleton matches the internal Go evaluator on
+the read-cascade dimension (`TestRegoParity_AllInternalCases`) and denies
+every write verb (`TestReferenceRego_FailClosedOnWrites`). This is a
+read-cascade + fail-closed guard, **not** a full-parity proof. The
+test-only import means the production binary stays OPA-free (~13 MB) — the
+OPA library is in `go.mod` but not in `go build`'s output.
 
-- The standard Rego matches the internal Go evaluator on every documented
-  cascade scenario (`TestRegoParity_AllInternalCases`).
-- The federal Rego agrees with the standard policy on every case where
-  no ancestor-deny intersects a leaf-allow, AND **disagrees** on the
-  cases where the AC-6 rule differs (`TestFederalRego_DivergencesFromStandard`).
-  This way both policies are guaranteed to behave as documented.
+The production decider is pure Go (no library bloat, no extra process); the
+wire format is OPA-canonical, so an operator can point an external OPA at it
+and extend the skeleton. Typical extensions an operator writes on top:
 
-The test-only import means the production binary stays OPA-free (still
-13 MB) — the OPA library is in `go.mod` but not in `go build`'s output.
-
-This gives you both ends of the spectrum: a single OPA-aware codebase
-where the production decider is pure Go (no library bloat, no extra
-process), the wire format is OPA-canonical (just point an external OPA
-at it and decisions delegate seamlessly), and the bundled reference
-Rego is a parity-tested artifact you can ship alongside or extend.
-
-Typical federal customizations on top of the bundled Rego:
-
-- **Parent-deny-is-absolute** — flip the leaf-allow-overrides-parent-deny
-  rule for NIST AC-6 least-privilege posture.
+- **Per-verb + WORM + roles + config-edit** — the semantics the skeleton
+  omits; required before the policy can authorize writes at all.
+- **Parent-deny-is-absolute** — make any ancestor deny absolute for a NIST
+  AC-6 least-privilege posture.
 - **Role-based access** — read additional input fields like
-  `input.user.roles` populated by the upstream proxy from SAML/OIDC
-  claims, and decide based on those instead of (or alongside) email.
-- **Time-of-day or IP-range constraints** — Rego can read
-  `input.context.now` and request metadata for context-aware
-  decisions.
-- **SIEM-shipped decision logs** — OPA's logging plugins emit every
-  decision in a structured format ready for Splunk Government, Elastic
-  Federal, etc.
+  `input.user.roles` populated by the upstream proxy from SAML/OIDC claims.
+- **Time-of-day or IP-range constraints**, and **SIEM-shipped decision
+  logs** via OPA's logging plugins (Splunk Government, Elastic Federal, etc.).
 
 ### Reference deployment shapes
 
@@ -1326,7 +1317,7 @@ No sidecar, no extra port, no extra binary.
 **Federal sidecar**: deploy OPA alongside zddc-server (k8s sidecar,
 nomad task, or systemd service on the same host), bind it to
 `127.0.0.1:8181` (or a Unix socket), point `ZDDC_OPA_URL` at it. OPA
-loads the deployment's bundled Rego policy from a configured source
+loads the deployment's own Rego policy from a configured source
 (filesystem, signed bundle from S3, OPAL, etc.) and is patched
 independently of zddc-server.
 
@@ -1350,10 +1341,12 @@ gaps that warrant code, in addition to the federal-readiness items above:
   CM-3 federal control above).
 - Per-decision caching for external OPA mode (small TTL on (email, path)
   to amortize the .archive listing's per-entry round-trip).
-- A reference Rego bundle shipped alongside the binary that exactly
-  reproduces internal mode, plus a "federal-mode" variant that flips
-  the parent-deny-is-absolute toggle. Useful as a starting point for
-  customers who want to extend rather than write from scratch.
+- A full-parity reference Rego (modelling per-verb / WORM / roles /
+  config-edit, not just the read-ACL skeleton shipped today) plus a
+  generative differential test against the internal decider — only worth
+  building if external OPA becomes a *supported deployment mode* rather than
+  a bring-your-own-policy escape hatch. See the skeleton's caveats under
+  "Reference Rego policy."
 
 ## Admin Debug Page
 

zddc/cmd/zddc-server/main.go

@@ -36,21 +36,18 @@ import (
 var version = "dev"
 
 func main() {
-	// --print-rego: dump a bundled reference Rego policy and exit.
-	// Cheap escape hatch for operators standing up an external OPA who want
-	// a parity-tested baseline as a starting point for customization.
+	// --print-rego: dump the bundled reference Rego skeleton and exit.
+	// A starting point for operators standing up an external OPA: it models
+	// the read-ACL cascade only and is fail-closed for writes (NOT a mirror
+	// of the internal decider), so it must be extended before granting writes.
 	//
-	//   --print-rego               → standard cascade (commercial default)
+	//   --print-rego               → read-ACL skeleton (fail-closed)
 	//   --print-rego=standard      → same
-	//   --print-rego=federal       → parent-deny-is-absolute (NIST AC-6)
 	for _, a := range os.Args[1:] {
 		switch a {
 		case "--print-rego", "--print-rego=standard":
 			fmt.Print(policy.ReferenceRego)
 			return
-		case "--print-rego=federal":
-			fmt.Print(policy.FederalRego)
-			return
 		case "show-defaults", "--show-defaults":
 			// Emit the embedded baseline as a .zddc.zip (per-depth policy
 			// tree, "*" wildcard members) to stdout. Redirect into a bundle

zddc/internal/handler/configpath.go

@@ -0,0 +1,37 @@
+package handler
+
+import (
+	"path/filepath"
+	"strings"
+
+	"codeberg.org/VARASYS/ZDDC/zddc/internal/apps"
+	"codeberg.org/VARASYS/ZDDC/zddc/internal/policy"
+)
+
+// configWriteAction returns the action a write to absPath must be authorized
+// as. The .zddc cascade file and the .zddc.zip bundle are policy, not content:
+// mutating either is a VerbA operation requiring standing config-edit authority
+// (IsConfigEditor — a subtree admin or `a`-verb holder, no elevation), which
+// the decider enforces when the action is tagged ActionAdmin. For any other
+// path the supplied default action is returned unchanged.
+//
+// This is the single predicate behind the per-verb escalation that previously
+// lived inlined in serveFilePut/serveFileDelete (.zddc only) and was MISSING
+// from serveFileMove — letting a MOVE plant or relocate a policy file with mere
+// create/write authority. PUT/DELETE on a URL-visible .zddc.zip are also
+// existence-gated to config-editors at dispatch (the bundle visibility gate in
+// cmd/zddc-server), but a MOVE destination rides in the X-ZDDC-Destination
+// header and never reaches that gate — so the authority bar must be enforced
+// here, on the resolved target path, for every write verb.
+//
+// Matching is case-insensitive to align with HasReservedSidecar: ZDDC_ROOT may
+// sit on a case-insensitive filesystem (SMB/CIFS/Azure Files) where `.ZDDC` /
+// `.ZDDC.ZIP` resolve to the same files, and a case-varied target must not slip
+// past the gate.
+func configWriteAction(absPath, def string) string {
+	base := filepath.Base(absPath)
+	if strings.EqualFold(base, ".zddc") || strings.EqualFold(base, apps.BundleName) {
+		return policy.ActionAdmin
+	}
+	return def
+}

zddc/internal/handler/fileapi.go

@@ -377,10 +377,9 @@ func serveFilePut(cfg config.Config, w http.ResponseWriter, r *http.Request) {
 	if existed {
 		action = policy.ActionWrite
 	}
-	// .zddc writes always require `a` (admin) regardless of create/overwrite.
-	if filepath.Base(abs) == ".zddc" {
-		action = policy.ActionAdmin
-	}
+	// Config files (.zddc / .zddc.zip) always require `a` (admin/config-edit)
+	// regardless of create/overwrite — see configWriteAction.
+	action = configWriteAction(abs, action)
 
 	if !authorizeAction(cfg, w, r, abs, cleanURL, action) {
 		return
@@ -545,10 +544,9 @@ func serveFileDelete(cfg config.Config, w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	action := policy.ActionDelete
-	if filepath.Base(abs) == ".zddc" {
-		action = policy.ActionAdmin
-	}
+	// Config files (.zddc / .zddc.zip) require `a` (admin/config-edit) to
+	// delete — see configWriteAction.
+	action := configWriteAction(abs, policy.ActionDelete)
 	if !authorizeAction(cfg, w, r, abs, cleanURL, action) {
 		return
 	}
@@ -676,10 +674,18 @@ func serveFileMove(cfg config.Config, w http.ResponseWriter, r *http.Request) {
 	// ACL: source side requires `w` (rename mutates the source); dest
 	// side requires `c` (creates a new path). Cross-folder moves run
 	// both gates against potentially different chains.
-	if !authorizeAction(cfg, w, r, srcAbs, srcURL, policy.ActionWrite) {
+	//
+	// Config files (.zddc / .zddc.zip) are policy, not content: relocating
+	// one mutates policy at BOTH ends (removing it from the source dir,
+	// installing it at the dest), so each side escalates to ActionAdmin —
+	// the same VerbA/config-edit bar PUT and DELETE enforce. Without this a
+	// caller holding only `w`/`c` could plant an attacker-controlled cascade
+	// (admins:/acl:) via the header-borne destination, which no dispatch
+	// gate inspects. See configWriteAction.
+	if !authorizeAction(cfg, w, r, srcAbs, srcURL, configWriteAction(srcAbs, policy.ActionWrite)) {
 		return
 	}
-	if !authorizeAction(cfg, w, r, dstAbs, dstURL, policy.ActionCreate) {
+	if !authorizeAction(cfg, w, r, dstAbs, dstURL, configWriteAction(dstAbs, policy.ActionCreate)) {
 		return
 	}
 	// If-Match concurrency applies to the source bytes — only meaningful for
@@ -815,10 +821,12 @@ func serveFileMkdir(cfg config.Config, w http.ResponseWriter, r *http.Request) {
 	//   - abs's parent is declared auto_own — every child mkdir under
 	//     an auto-own folder (working/, staging/, archive/<party>/,
 	//     archive/<party>/incoming/, …) gets the creator's grant.
-	// The fence (inherit:false) follows abs's own cascade level:
-	// per-user homes under working/ declare auto_own_fenced, so the
-	// generated .zddc is private; other auto-own positions are
-	// unfenced so ancestor grants still cascade through.
+	// The fence (inherit:false) follows abs's own cascade level via
+	// AutoOwnFencedAt. It is an opt-in the default tree does not set —
+	// the working/staging/incoming/reviewing party homes are auto-owned
+	// but UNFENCED, so ancestor grants (e.g. project_team cr) cascade
+	// through and they behave as shared team folders. An operator can
+	// set auto_own_fenced on a position to make it private.
 	if email != "" {
 		if zddc.AutoOwnAt(cfg.Root, abs) || zddc.AutoOwnAt(cfg.Root, filepath.Dir(abs)) {
 			roles := zddc.AutoOwnRolesAt(cfg.Root, abs)

zddc/internal/handler/fileapi_test.go

@@ -949,3 +949,86 @@ func TestFileAPI_PreservesCase(t *testing.T) {
 		t.Errorf("PUT case NOT preserved (%v)", names)
 	}
 }
+
+// TestFileAPI_MoveOntoConfigRequiresConfigEdit pins the authorization parity
+// between MOVE and PUT/DELETE for config files. alice@example.com holds rwcd
+// (create+write) via the default *@example.com grant and is elevated — but is
+// named in no admins: and holds no `a` verb, so she is NOT a config-editor.
+// Moving a file ONTO a .zddc/.zddc.zip, or moving a .zddc AWAY, mutates policy
+// and must require config-edit (VerbA), not mere create/write. Pre-fix, MOVE
+// authorized the destination as ActionCreate and the source as ActionWrite, so
+// each of these succeeded — letting a non-admin plant an attacker-controlled
+// cascade. See configWriteAction / serveFileMove.
+func TestFileAPI_MoveOntoConfigRequiresConfigEdit(t *testing.T) {
+	t.Run("move onto .zddc is forbidden", func(t *testing.T) {
+		_, do, root := fileAPITestSetup(t, []string{"Incoming"}, map[string]string{
+			"Incoming/payload.txt": "x",
+		})
+		rec := do(http.MethodPost, "/Incoming/payload.txt", "alice@example.com", nil, map[string]string{
+			headerOp:          opMove,
+			headerDestination: "/Incoming/.zddc",
+		})
+		if rec.Code != http.StatusForbidden {
+			t.Fatalf("want 403, got %d: %s", rec.Code, rec.Body.String())
+		}
+		if _, err := os.Stat(filepath.Join(root, "Incoming/.zddc")); err == nil {
+			t.Fatal("a .zddc was planted despite the 403")
+		}
+	})
+
+	t.Run("move onto .zddc.zip is forbidden", func(t *testing.T) {
+		_, do, root := fileAPITestSetup(t, []string{"Incoming"}, map[string]string{
+			"Incoming/payload.txt": "x",
+		})
+		rec := do(http.MethodPost, "/Incoming/payload.txt", "alice@example.com", nil, map[string]string{
+			headerOp:          opMove,
+			headerDestination: "/Incoming/.zddc.zip",
+		})
+		if rec.Code != http.StatusForbidden {
+			t.Fatalf("want 403, got %d: %s", rec.Code, rec.Body.String())
+		}
+		if _, err := os.Stat(filepath.Join(root, "Incoming/.zddc.zip")); err == nil {
+			t.Fatal("a .zddc.zip bundle was planted despite the 403")
+		}
+	})
+
+	t.Run("moving a .zddc away is forbidden", func(t *testing.T) {
+		_, do, root := fileAPITestSetup(t, []string{"Incoming", "Other"}, map[string]string{
+			"Incoming/.zddc": "acl:\n  permissions:\n    \"*@example.com\": rwcd\n",
+		})
+		rec := do(http.MethodPost, "/Incoming/.zddc", "alice@example.com", nil, map[string]string{
+			headerOp:          opMove,
+			headerDestination: "/Other/.zddc",
+		})
+		if rec.Code != http.StatusForbidden {
+			t.Fatalf("want 403, got %d: %s", rec.Code, rec.Body.String())
+		}
+		if _, err := os.Stat(filepath.Join(root, "Incoming/.zddc")); err != nil {
+			t.Fatalf("source .zddc was removed despite the 403: %v", err)
+		}
+	})
+
+	t.Run("config-editor may move config (positive control)", func(t *testing.T) {
+		_, do, root := fileAPITestSetup(t, []string{"Incoming"}, map[string]string{
+			"Incoming/payload.txt": "x",
+		})
+		// Grant admin@example.com the `a` verb (standing config-edit) on top
+		// of rwcd. The same MOVE that alice is denied must still succeed for a
+		// config-editor — proving the fix gates on authority, not on the verb.
+		if err := os.WriteFile(filepath.Join(root, ".zddc"),
+			[]byte("acl:\n  permissions:\n    \"admin@example.com\": rwcda\n    \"*@example.com\": rwcd\n"), 0o644); err != nil {
+			t.Fatalf("rewrite root .zddc: %v", err)
+		}
+		zddc.InvalidateCache(root)
+		rec := do(http.MethodPost, "/Incoming/payload.txt", "admin@example.com", nil, map[string]string{
+			headerOp:          opMove,
+			headerDestination: "/Incoming/.zddc",
+		})
+		if rec.Code != http.StatusOK {
+			t.Fatalf("config-editor move: want 200, got %d: %s", rec.Code, rec.Body.String())
+		}
+		if _, err := os.Stat(filepath.Join(root, "Incoming/.zddc")); err != nil {
+			t.Fatalf("authorized editor's move did not land the file: %v", err)
+		}
+	})
+}

zddc/internal/handler/tables.html

@@ -814,23 +814,75 @@ body.help-open .app-header {
    with tool-local .toast classes; the old classifier rules can stay
    alongside until this file is concatenated above them in the build. */
 
-.zddc-toast {
+/* Toast STACK — bottom-right, newest at the bottom. The container is
+   click-through (pointer-events:none) so the gaps don't block the page; each
+   toast + button re-enables pointer events. */
+.zddc-toasts {
     position: fixed;
-    bottom: 2rem;
-    right: 2rem;
+    bottom: 1.5rem;
+    right: 1.5rem;
+    z-index: 9000;
+    display: flex;
+    flex-direction: column;
+    align-items: flex-end;
+    gap: 0.5rem;
+    max-height: calc(100vh - 3rem);
+    overflow-y: auto;
+    pointer-events: none;
+}
+
+/* "Clear all" — shown above the stack when 2+ toasts are present. */
+.zddc-toasts__clear {
+    pointer-events: auto;
+    align-self: flex-end;
     background: var(--bg);
     color: var(--text);
-    padding: 0.875rem 1.25rem;
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    padding: 0.2rem 0.6rem;
+    font-size: 0.78rem;
+    cursor: pointer;
+}
+.zddc-toasts__clear:hover { background: var(--bg-secondary, rgba(0, 0, 0, 0.05)); }
+
+.zddc-toast {
+    position: relative;
+    pointer-events: auto;
+    background: var(--bg);
+    color: var(--text);
+    padding: 0.7rem 1.7rem 0.7rem 1rem; /* room for the × at top-right */
     border-radius: var(--radius);
     border: 1px solid var(--border);
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-    z-index: 9000;
-    max-width: 400px;
+    max-width: 420px;
     font-size: 0.875rem;
-    cursor: pointer;
     animation: zddc-toast-in 0.3s ease-out;
 }
 
+/* Message text — selectable + copyable; long/multi-line errors wrap. */
+.zddc-toast__msg {
+    user-select: text;
+    -webkit-user-select: text;
+    cursor: text;
+    white-space: pre-wrap;
+    word-break: break-word;
+}
+
+/* Per-toast dismiss. */
+.zddc-toast__close {
+    position: absolute;
+    top: 0.2rem;
+    right: 0.35rem;
+    border: none;
+    background: transparent;
+    color: var(--text-muted, #888);
+    font-size: 1.15rem;
+    line-height: 1;
+    cursor: pointer;
+    padding: 0 0.15rem;
+}
+.zddc-toast__close:hover { color: var(--text); }
+
 .zddc-toast--success { border-left: 4px solid var(--success); }
 .zddc-toast--error   { border-left: 4px solid var(--danger); }
 .zddc-toast--info    { border-left: 4px solid var(--info); }
@@ -1670,7 +1722,7 @@ body.is-elevated::after {
             </svg>
             <div class="header-title-group">
                 <span class="app-header__title" id="table-title">ZDDC Table</span>
-                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.27-beta · 2026-06-09 15:30:13 · 237c353</span></span>
+                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.27-dev · 2026-06-10 14:42:21 · 8f839fc</span></span>
             </div>
         </div>
         <div class="header-right">
@@ -2746,74 +2798,122 @@ body.is-elevated::after {
 }());
 
 // shared/toast.js — non-blocking notification helper available to every
-// tool via window.zddc.toast(msg, level, opts). Originated as classifier's
-// local showToast (classifier/js/excel.js); promoted here so tools that
-// today use alert() or silent console.error can switch to a uniform
-// non-blocking surface.
+// tool via window.zddc.toast(msg, level, opts).
+//
+// Toasts collect in a bottom-right STACK. Error/warning toasts are STICKY —
+// they stay until the user dismisses them (per-toast × or a "Clear all"
+// button) so the message can be read, selected, and copied while
+// troubleshooting. info/success toasts auto-dismiss. The message text is
+// always selectable.
 //
 // Usage:
-//   window.zddc.toast('Saved.', 'success');
-//   window.zddc.toast('Could not load: ' + err.message, 'error');
+//   window.zddc.toast('Saved.', 'success');               // auto-dismiss
+//   window.zddc.toast('Could not load: ' + e.message, 'error');  // sticky
 //   window.zddc.toast('Note', 'info', { durationMs: 3000 });
+//   window.zddc.toast('Heads up', 'info', { durationMs: 0 });    // force sticky
 //
 // Levels: 'info' (default) | 'success' | 'warning' | 'error'.
-// Each tool may also expose app.notify(msg, level) as a thin wrapper —
-// see ARCHITECTURE.md for the convention.
 (function () {
     'use strict';
 
     if (!window.zddc) window.zddc = {};
-    // Don't overwrite if a tool defined its own first.
     if (typeof window.zddc.toast === 'function') return;
 
     var DEFAULT_DURATION_MS = 5000;
     var FADE_MS = 300;
+    // Levels that persist until the user dismisses them (troubleshooting).
+    var STICKY = { error: true, warning: true };
+
+    function container() {
+        var c = document.getElementById('zddc-toasts');
+        if (c) return c;
+        c = document.createElement('div');
+        c.id = 'zddc-toasts';
+        c.className = 'zddc-toasts';
+        document.body.appendChild(c);
+        return c;
+    }
+
+    // Show/hide a "Clear all" control when 2+ toasts are stacked.
+    function refreshClearAll(c) {
+        var bar = c.querySelector('.zddc-toasts__clear');
+        var count = c.querySelectorAll('.zddc-toast').length;
+        if (count >= 2) {
+            if (!bar) {
+                bar = document.createElement('button');
+                bar.type = 'button';
+                bar.className = 'zddc-toasts__clear';
+                bar.textContent = 'Clear all';
+                bar.addEventListener('click', function () {
+                    var all = c.querySelectorAll('.zddc-toast');
+                    for (var i = 0; i < all.length; i++) dismiss(all[i]);
+                });
+                c.insertBefore(bar, c.firstChild);
+            }
+        } else if (bar) {
+            bar.remove();
+        }
+    }
+
+    function dismiss(el) {
+        if (el._dismissed) return;
+        el._dismissed = true;
+        if (el._timer) clearTimeout(el._timer);
+        el.classList.add('zddc-toast--fade');
+        setTimeout(function () {
+            if (el.parentNode) el.parentNode.removeChild(el);
+            refreshClearAll(container());
+        }, FADE_MS);
+    }
 
     function toast(message, level, opts) {
         opts = opts || {};
         var lvl = (level === 'success' || level === 'error' ||
                    level === 'warning') ? level : 'info';
-
-        // Single-toast policy: dismiss any existing toast immediately
-        // so the new one is always the most recent. Matches the
-        // classifier's prior behavior and avoids stack-of-toasts UX.
-        var existing = document.querySelector('.zddc-toast');
-        if (existing) existing.remove();
+        var c = container();
 
         var el = document.createElement('div');
         el.className = 'zddc-toast zddc-toast--' + lvl;
         // ARIA: errors get assertive (interrupts SR queue), others polite.
         el.setAttribute('role', lvl === 'error' ? 'alert' : 'status');
         el.setAttribute('aria-live', lvl === 'error' ? 'assertive' : 'polite');
-        el.textContent = message == null ? '' : String(message);
-        document.body.appendChild(el);
 
-        var dur = typeof opts.durationMs === 'number' ?
-                  opts.durationMs : DEFAULT_DURATION_MS;
-        var timer = setTimeout(function () {
-            el.classList.add('zddc-toast--fade');
-            setTimeout(function () {
-                if (el.parentNode) el.parentNode.removeChild(el);
-            }, FADE_MS);
-        }, dur);
+        // Selectable, copyable message text (its own element so clicking to
+        // select doesn't dismiss the toast — only the × does).
+        var msg = document.createElement('span');
+        msg.className = 'zddc-toast__msg';
+        msg.textContent = message == null ? '' : String(message);
+        el.appendChild(msg);
 
-        // Click-to-dismiss. Useful for sticky errors the user wants gone.
-        el.addEventListener('click', function () {
-            clearTimeout(timer);
-            if (el.parentNode) el.parentNode.removeChild(el);
-        });
+        var close = document.createElement('button');
+        close.type = 'button';
+        close.className = 'zddc-toast__close';
+        close.setAttribute('aria-label', 'Dismiss');
+        close.textContent = '×';
+        close.addEventListener('click', function () { dismiss(el); });
+        el.appendChild(close);
 
+        c.appendChild(el);
+
+        // Sticky (error/warning, or opts.durationMs === 0) persists; otherwise
+        // auto-dismiss after the (overridable) duration.
+        var sticky = opts.durationMs === 0 ||
+            (typeof opts.durationMs !== 'number' && STICKY[lvl]);
+        if (!sticky) {
+            var dur = typeof opts.durationMs === 'number'
+                ? opts.durationMs : DEFAULT_DURATION_MS;
+            el._timer = setTimeout(function () { dismiss(el); }, dur);
+        }
+
+        refreshClearAll(c);
         return el;
     }
 
     window.zddc.toast = toast;
 
-    // Route window.alert() calls into the toast helper. Every tool has
-    // accumulated some `alert(...)` sites for error reporting; rather
-    // than touch each one, intercept globally so they're non-blocking
-    // and ARIA-announced consistently. Native alert is preserved on
-    // window.alertNative for the rare case where a truly modal block
-    // is needed (e.g. before navigating away with unsaved changes).
+    // Route window.alert() into the toast helper (non-blocking, ARIA-announced,
+    // consistent). Native alert preserved on window.alertNative. alert() maps
+    // to an error toast (sticky) since that's its usual purpose.
     if (typeof window.alert === 'function' && !window.alertNative) {
         window.alertNative = window.alert.bind(window);
         window.alert = function (msg) {

zddc/internal/policy/federal_parity_test.go

@@ -1,191 +0,0 @@
-package policy
-
-import (
-	"context"
-	"testing"
-
-	"codeberg.org/VARASYS/ZDDC/zddc/internal/zddc"
-
-	"github.com/open-policy-agent/opa/rego"
-)
-
-// TestFederalRego_DivergencesFromStandard validates the federal-mode
-// variant by asserting both that:
-//
-//   (a) most cascade scenarios produce the same verdict as standard
-//       (the federal rule reduces to standard whenever no parent deny
-//       intersects a leaf allow), AND
-//
-//   (b) the specific scenarios where the rules differ (a leaf-level
-//       allow overlaying an ancestor's deny) produce DIFFERENT verdicts:
-//       standard says allow (leaf wins); federal says deny (ancestor
-//       deny is absolute — NIST AC-6 default).
-//
-// Like the standard parity test, this imports the OPA library as a
-// test-only dependency. The federal Rego is a deployable artifact
-// (operators dump it via --print-rego=federal); the parity guard
-// here proves the artifact behaves as documented.
-func TestFederalRego_DivergencesFromStandard(t *testing.T) {
-	ctx := context.Background()
-
-	standard, err := rego.New(
-		rego.Query("data.zddc.access.allow"),
-		rego.Module("access.rego", ReferenceRego),
-	).PrepareForEval(ctx)
-	if err != nil {
-		t.Fatalf("compile standard rego: %v", err)
-	}
-	federal, err := rego.New(
-		rego.Query("data.zddc.access_federal.allow"),
-		rego.Module("access_federal.rego", FederalRego),
-	).PrepareForEval(ctx)
-	if err != nil {
-		t.Fatalf("compile federal rego: %v", err)
-	}
-
-	allow := func(p ...string) zddc.ZddcFile {
-		m := make(map[string]string, len(p))
-		for _, x := range p {
-			m[x] = "rwcd"
-		}
-		return zddc.ZddcFile{ACL: zddc.ACLRules{Permissions: m}}
-	}
-	deny := func(p ...string) zddc.ZddcFile {
-		m := make(map[string]string, len(p))
-		for _, x := range p {
-			m[x] = ""
-		}
-		return zddc.ZddcFile{ACL: zddc.ACLRules{Permissions: m}}
-	}
-	empty := zddc.ZddcFile{}
-
-	cases := []struct {
-		name             string
-		chain            zddc.PolicyChain
-		email            string
-		wantStandard     bool
-		wantFederal      bool
-		divergesByDesign bool // true if standard and federal must disagree here
-	}{
-		// ── Cases where the two policies must AGREE ────────────────
-		{
-			"empty chain, no files",
-			zddc.PolicyChain{HasAnyFile: false},
-			"alice@example.com",
-			true, true, false,
-		},
-		{
-			"files exist, no rule matches → both deny",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{allow("*@trusted.com")}, HasAnyFile: true},
-			"alice@example.com",
-			false, false, false,
-		},
-		{
-			"leaf allow with no ancestor deny → both allow",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{empty, allow("*@example.com")}, HasAnyFile: true},
-			"alice@example.com",
-			true, true, false,
-		},
-		{
-			"only deny anywhere → both deny",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{deny("alice@example.com")}, HasAnyFile: true},
-			"alice@example.com",
-			false, false, false,
-		},
-		{
-			"glob allow, no deny → both allow",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{allow("*@example.com")}, HasAnyFile: true},
-			"alice@example.com",
-			true, true, false,
-		},
-
-		// ── The signature divergence: leaf allow overlaying ancestor deny ──
-		{
-			"leaf allows what parent denied → standard allows, federal denies (AC-6)",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{
-				deny("alice@example.com"),
-				allow("alice@example.com"),
-			}, HasAnyFile: true},
-			"alice@example.com",
-			true,  // standard: leaf wins
-			false, // federal: parent deny is absolute
-			true,
-		},
-		{
-			"deep leaf re-allows after middle deny → standard allows, federal denies",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{
-				allow("*@example.com"),
-				deny("alice@example.com"),
-				allow("alice@example.com"),
-			}, HasAnyFile: true},
-			"alice@example.com",
-			true,
-			false,
-			true,
-		},
-		{
-			"glob deny at root, specific allow at leaf → both differ",
-			zddc.PolicyChain{Levels: []zddc.ZddcFile{
-				deny("*@example.com"),
-				allow("alice@example.com"),
-			}, HasAnyFile: true},
-			"alice@example.com",
-			true,
-			false,
-			true,
-		},
-	}
-
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			input := AllowInput{Path: "/test", PolicyChain: chainToSerializable(tc.chain)}
-			input.User.Email = tc.email
-			regoInput, err := canonicalInput(input)
-			if err != nil {
-				t.Fatalf("encode input: %v", err)
-			}
-
-			std, err := standard.Eval(ctx, rego.EvalInput(regoInput))
-			if err != nil {
-				t.Fatalf("standard eval: %v", err)
-			}
-			fed, err := federal.Eval(ctx, rego.EvalInput(regoInput))
-			if err != nil {
-				t.Fatalf("federal eval: %v", err)
-			}
-			if len(std) == 0 || len(fed) == 0 {
-				t.Fatal("rego returned empty result set")
-			}
-			stdAllow := std[0].Expressions[0].Value.(bool)
-			fedAllow := fed[0].Expressions[0].Value.(bool)
-
-			if stdAllow != tc.wantStandard {
-				t.Errorf("standard rego: got %v, want %v", stdAllow, tc.wantStandard)
-			}
-			if fedAllow != tc.wantFederal {
-				t.Errorf("federal rego: got %v, want %v", fedAllow, tc.wantFederal)
-			}
-			// Cross-check the divergence flag itself: if we said the cases
-			// must disagree, they must; if we said they agree, they must.
-			diverges := stdAllow != fedAllow
-			if diverges != tc.divergesByDesign {
-				t.Errorf("divergence = %v, want %v (standard=%v, federal=%v)",
-					diverges, tc.divergesByDesign, stdAllow, fedAllow)
-			}
-		})
-	}
-}
-
-// TestFederalRego_RegoCompiles is a sanity check that the embedded
-// federal Rego file parses without error in OPA, separate from the
-// behavior tests. Catches accidental syntax breakage in
-// access_federal.rego before running the (slower) parity matrix.
-func TestFederalRego_RegoCompiles(t *testing.T) {
-	_, err := rego.New(
-		rego.Query("data.zddc.access_federal.allow"),
-		rego.Module("access_federal.rego", FederalRego),
-	).PrepareForEval(context.Background())
-	if err != nil {
-		t.Fatalf("federal rego does not compile: %v", err)
-	}
-}

zddc/internal/policy/policy.go

@@ -58,18 +58,21 @@ import (
 // External Rego policies can:
 //   - read input.user.email (string)
 //   - read input.path (string)
-//   - read input.action ("read" | "write"); empty/absent ≡ "read"
+//   - read input.action ("read"|"write"|"create"|"delete"|"admin");
+//     empty/absent ≡ "read"
 //   - walk input.policy_chain.levels[].acl.{allow,deny} for
 //     custom cascade semantics, or read the pre-resolved
 //     input.policy_chain.has_any_file when implementing the
 //     same default-deny rule we use internally.
 //
-// Action distinguishes read (GET/HEAD on listings, files, app HTML)
-// from write (PUT, DELETE, POST/move on the file API). The internal
-// decider treats both identically — any allow grants full CRUD,
-// matching the model in place before the file API existed (anyone
-// with read access also had OS-level write via the mounted share).
-// External Rego policies can split the two by inspecting input.action.
+// Action distinguishes read (GET/HEAD on listings, files, app HTML) from
+// write/create/delete/admin (PUT, DELETE, POST/move on the file API). The
+// internal decider HONORS it: actionVerb maps each action to the verb it
+// requires, and AllowActionFromChainP checks that specific verb against the
+// cascade's effective grant, with the WORM clamp and the admin/elevation
+// bypass applied. The bundled reference Rego, by contrast, models the
+// read-ACL cascade only and is fail-closed for non-read actions — see
+// rego/access.rego.
 type AllowInput struct {
 	User struct {
 		Email string `json:"email"`
@@ -240,11 +243,21 @@ func (d *InternalDecider) Allow(_ context.Context, input AllowInput) (bool, erro
 	// is a STANDING permission: a subtree admin (admins: cascade) or a
 	// holder of the `a` verb may edit the config of subtrees they
 	// administer WITHOUT elevating. This sits ABOVE the WORM clamp because
-	// config is not WORM-protected data — and it only ever grants VerbA,
-	// so it can never write/delete/create WORM *records* (those need
-	// W/C/D, which stay clamped and behind the elevated bypass above).
-	// Elevation is thus purely additive: it adds the WORM/destructive
-	// overrides, never gating config-edit you already have authority for.
+	// config is not WORM-protected data.
+	//
+	// Scope: this grants VerbA only, so no SINGLE decision here authorizes a
+	// WORM *record* write/delete/create (those need W/C/D, which stay clamped
+	// below, behind the elevated bypass above). It does NOT, however, make a
+	// WORM zone tamper-proof against its own policy owner: a config-editor who
+	// administers a WORM directory may edit that directory's .zddc — including
+	// relaxing or (via inherit:false) dropping its `worm:` marker — after
+	// which ordinary writes to that subtree are no longer clamped. That
+	// two-step demotion is intended (owning a subtree's policy includes its
+	// worm: declaration) and is access-logged/transparent: WORM is therefore
+	// tamper-EVIDENT to its config owner, not tamper-PROOF. A deployment that
+	// needs the marker immutable except under elevation should gate worm:
+	// relaxation behind IsActiveAdmin. The edit-then-write composition is
+	// pinned in standing_config_test.go (TestStandingConfigEdit_WormDemotionIsTwoStep).
 	if verb == zddc.VerbA && zddc.IsConfigEditor(chain, email) {
 		return true, nil
 	}

zddc/internal/policy/rego.go

@@ -2,22 +2,26 @@ package policy
 
 import _ "embed"
 
-// ReferenceRego is the canonical Rego policy bundled with zddc-server.
-// It mirrors the InternalDecider's semantics exactly — every release CI
-// run validates parity via parity_test.go (which imports the OPA library
-// as a test-only dependency, so the production binary stays OPA-free).
+// ReferenceRego is a read-ACL Rego SKELETON bundled with zddc-server for
+// external-OPA deployments. It models the read cascade ONLY and is NOT a
+// semantic mirror of the InternalDecider: it does not implement per-verb
+// authorization (write/create/delete/admin), WORM zones, roles, fences, or
+// config-edit, so it is FAIL-CLOSED — every non-read action is denied except
+// for an elevated admin (input.user.is_active_admin). The InternalDecider
+// remains the production source of truth. parity_test.go (OPA as a test-only
+// dependency, so the production binary stays OPA-free) checks the modelled
+// read-cascade dimension only — it does NOT prove full parity.
 //
-// Operators running an external OPA can use this as the starting point
-// for their own policy bundle:
+// Operators running an external OPA can use this as a STARTING POINT — they
+// must add the unmodelled write/WORM/role/admin semantics before relying on
+// it for write authorization:
 //
 //	zddc-server --print-rego > /etc/opa/policies/zddc-access.rego
 //
 // Customizations typical for federal deployments:
 //
 //   - Flip the leaf-allow-overrides-parent-deny semantics so parent denies
-//     are absolute (NIST AC-6 least-privilege posture). For this specific
-//     case zddc-server ships a parity-tested federal-mode variant; see
-//     FederalRego and `--print-rego=federal`.
+//     are absolute (NIST AC-6 least-privilege posture).
 //   - Add role-based access via additional input fields (input.user.roles
 //     populated by the upstream proxy from SAML/OIDC claims).
 //   - Add time-of-day or IP-range constraints.
@@ -26,21 +30,3 @@ import _ "embed"
 //
 //go:embed rego/access.rego
 var ReferenceRego string
-
-// FederalRego is the strict-least-privilege variant of ReferenceRego
-// where parent denies are absolute (NIST AC-6). Drop-in for federal
-// customers who need the AC-6 posture without writing Rego from
-// scratch:
-//
-//	zddc-server --print-rego=federal > /etc/opa/policies/zddc-access.rego
-//
-// The internal Go evaluator does NOT implement these semantics — it
-// stays on the commercial cascade. Federal-mode is reachable only by
-// running OPA with this policy and pointing ZDDC_OPA_URL at it. See
-// zddc/internal/policy/rego/access_federal.rego for the policy itself
-// and federal_parity_test.go for the divergence-test fixtures (cases
-// where federal-mode and commercial-mode disagree, asserting each gives
-// the expected verdict).
-//
-//go:embed rego/access_federal.rego
-var FederalRego string

zddc/internal/policy/rego/access.rego

@@ -1,16 +1,26 @@
-# Reference Rego policy that mirrors zddc-server's built-in `internal`
-# decider exactly. Federal customers running their own OPA can use this
-# as a starting point (and then tighten — e.g. flip the leaf-allow-overrides-
-# parent-deny rule for NIST AC-6 compliance).
+# Reference Rego SKELETON for an external-OPA deployment. It models the
+# read-ACL cascade ONLY. It is NOT semantically equivalent to zddc-server's
+# built-in `internal` decider and MUST NOT be deployed as-is for a system
+# that relies on write authorization.
 #
-# The internal evaluator (in zddc/internal/zddc/acl.go) is the source of
-# truth for production. This file is validated against that evaluator on
-# every CI run via the parity test in zddc/internal/policy/parity_test.go.
-# Both implementations must produce the same decision for every fixture.
+# Models: the deepest-matching-level read-ACL cascade — glob patterns,
+# deny-first-within-a-level, default-deny once any .zddc exists.
+#
+# Does NOT model (the internal decider in zddc/internal/zddc + internal/policy
+# does): per-verb authorization (write/create/delete/admin), WORM zones,
+# roles: membership resolution, inherit:false fences, and standing config-edit
+# (the `a` verb). Because those are unmodelled this policy is FAIL-CLOSED:
+# every non-read action is denied, and an elevated admin
+# (input.user.is_active_admin) is the only write-capable principal. A real
+# deployment must add the missing semantics before granting writes — see the
+# parity tests under zddc/internal/policy for the dimensions to cover. The
+# internal Go decider remains the production source of truth; this file is a
+# starting point, not a tested mirror of it.
 #
 # Input shape (matches zddc/internal/policy.AllowInput JSON encoding):
 #   {
-#     "user": {"email": "alice@example.com"},
+#     "user": {"email": "alice@example.com", "is_active_admin": false},
+#     "action": "read",   # "" / absent == read; else write|create|delete|admin
 #     "path": "/Project-A/sub/",
 #     "policy_chain": {
 #       "levels": [
@@ -39,14 +49,40 @@ import future.keywords.in
 
 default allow := false
 
-# Allow when no .zddc files anywhere in the chain AND no rule matches.
+# Elevated admins bypass — mirrors the internal decider's single admin
+# short-circuit. The caller computes is_active_admin (admin authority on this
+# chain AND elevated/opted-in); trusting it here is the same trust the
+# internal decider applies. This is the ONLY path that authorizes a non-read
+# action under this read-ACL skeleton.
 allow if {
+	input.user.is_active_admin
+}
+
+# This policy models read-ACL only, so every cascade grant below is gated on a
+# read action; any write/create/delete/admin falls through to the default-deny
+# above (fail-closed). Empty/absent action == read.
+is_read_action if {
+	not input.action
+}
+
+is_read_action if {
+	input.action == ""
+}
+
+is_read_action if {
+	input.action == "read"
+}
+
+# Read allowed when no .zddc files anywhere in the chain AND no rule matches.
+allow if {
+	is_read_action
 	not input.policy_chain.has_any_file
 	count(matched_levels) == 0
 }
 
-# Allow when the deepest matching level grants.
+# Read allowed when the deepest matching level grants.
 allow if {
+	is_read_action
 	count(matched_levels) > 0
 	deepest := max(matched_levels)
 	level_grants(input.policy_chain.levels[deepest])

zddc/internal/policy/rego/access_federal.rego

@@ -1,99 +0,0 @@
-# Federal-mode reference policy: parent-deny-is-absolute (NIST AC-6).
-#
-# This is a strict-least-privilege variant of access.rego. The two policies
-# differ in exactly one rule, but the semantic difference is meaningful for
-# federal evaluators:
-#
-#   access.rego (commercial, default):
-#     "Bottom-up walk; first explicit match wins; deny-first within a level.
-#      A leaf-level allow CAN override an ancestor's deny."
-#     Test: cascade_test.go "leaf allows user that parent denies → leaf wins".
-#
-#   access_federal.rego (federal):
-#     "Any deny anywhere along the chain is absolute. An allow only matters
-#      if no ancestor (or sibling level) has denied the same email. Leaf-
-#      level allows do NOT override ancestor denies."
-#     Required by NIST AC-6 (Least Privilege) default expectations: a
-#     central admin's deny at the root must be unbypassable by a tenant
-#     who controls a subtree's .zddc.
-#
-# Why ship two policies? The internal Go evaluator (in zddc/internal/zddc/
-# acl.go) implements only the commercial cascade — it's the rule the
-# default deployment exercises. Federal customers running their own OPA
-# with this file get the strict variant without any zddc-server code
-# change. They can also write a hybrid policy (e.g. "deny is absolute
-# only for emails matching some pattern; cascade rules for everyone
-# else") since once they're hosting their own OPA, the constraint is
-# whatever they write.
-#
-# Input shape: identical to access.rego — see that file's docstring.
-# acl.permissions maps principal patterns to verb strings; an empty
-# verb string is an explicit deny.
-
-package zddc.access_federal
-
-import future.keywords.if
-import future.keywords.in
-
-default allow := false
-
-# Allow when no .zddc files exist anywhere AND no rule matches.
-# Same default-allow case as commercial; preserves the empty-tree
-# behaviour. (zddc-server's --insecure check at startup makes this
-# unreachable in any non-deliberately-public deployment.)
-allow if {
-	not input.policy_chain.has_any_file
-	not any_deny_match
-	not any_allow_match
-}
-
-# Allow when files exist, no level (any depth) denies, and at least
-# one level allows. The "any level" check is what makes parent denies
-# absolute — there is no "deepest match wins" rule here.
-allow if {
-	input.policy_chain.has_any_file
-	not any_deny_match
-	any_allow_match
-}
-
-# Any explicit-deny permission entry at ANY level matches the email.
-any_deny_match if {
-	some level in input.policy_chain.levels
-	some pattern, verbs in level.acl.permissions
-	verbs == ""
-	email_matches(pattern, input.user.email)
-}
-
-# Any grant permission entry (non-empty verbs) at ANY level matches.
-any_allow_match if {
-	some level in input.policy_chain.levels
-	some pattern, verbs in level.acl.permissions
-	verbs != ""
-	email_matches(pattern, input.user.email)
-}
-
-# email_matches: identical to access.rego — see that file for the
-# rationale on the four cases. Duplicated rather than imported so this
-# file is self-contained for operators who copy it as a starting point.
-
-email_matches(pattern, email) if {
-	pattern == email
-}
-
-email_matches(pattern, email) if {
-	pattern == "*"
-	email != ""
-}
-
-email_matches(pattern, email) if {
-	contains(pattern, "*")
-	contains(pattern, "@")
-	glob.match(pattern, ["@"], email)
-}
-
-email_matches(pattern, email) if {
-	contains(pattern, "*")
-	not contains(pattern, "@")
-	pattern != "*"
-	glob.match(pattern, [], email)
-}

zddc/internal/policy/rego_failclosed_test.go

@@ -0,0 +1,83 @@
+package policy
+
+import (
+	"context"
+	"testing"
+
+	"codeberg.org/VARASYS/ZDDC/zddc/internal/zddc"
+
+	"github.com/open-policy-agent/opa/rego"
+)
+
+// TestReferenceRego_FailClosedOnWrites pins the security contract of the
+// bundled reference Rego skeleton: it models READ-ACL only, so any non-read
+// action must be DENIED even when the read-ACL would grant — and the only
+// write-capable principal is an elevated admin. This is the behavior that,
+// untested, previously let a verb-blind policy ship claiming to "mirror the
+// internal decider exactly." See rego/access.rego.
+func TestReferenceRego_FailClosedOnWrites(t *testing.T) {
+	ctx := context.Background()
+
+	stdQ, err := rego.New(
+		rego.Query("data.zddc.access.allow"),
+		rego.Module("access.rego", ReferenceRego),
+	).PrepareForEval(ctx)
+	if err != nil {
+		t.Fatalf("compile access.rego: %v", err)
+	}
+
+	// A chain that GRANTS full rwcd to alice — so any denial below is the
+	// action gate, not a missing ACL.
+	grant := zddc.PolicyChain{
+		Levels:     []zddc.ZddcFile{{ACL: zddc.ACLRules{Permissions: map[string]string{"*@example.com": "rwcd"}}}},
+		HasAnyFile: true,
+	}
+
+	evalAllow := func(q rego.PreparedEvalQuery, action string, admin bool) bool {
+		in := AllowInput{Path: "/p/", Action: action, PolicyChain: chainToSerializable(grant)}
+		in.User.Email = "alice@example.com"
+		in.User.IsActiveAdmin = admin
+		regoInput, err := canonicalInput(in)
+		if err != nil {
+			t.Fatalf("encode: %v", err)
+		}
+		rs, err := q.Eval(ctx, rego.EvalInput(regoInput))
+		if err != nil {
+			t.Fatalf("eval: %v", err)
+		}
+		if len(rs) == 0 {
+			t.Fatalf("no result")
+		}
+		v, ok := rs[0].Expressions[0].Value.(bool)
+		if !ok {
+			t.Fatalf("result not bool: %v", rs[0].Expressions[0].Value)
+		}
+		return v
+	}
+
+	cases := []struct {
+		name      string
+		q         rego.PreparedEvalQuery
+		action    string
+		admin     bool
+		wantAllow bool
+	}{
+		// Commercial: reads granted, every write verb denied (fail-closed).
+		{"access read allowed", stdQ, ActionRead, false, true},
+		{"access empty-action(read) allowed", stdQ, "", false, true},
+		{"access write denied", stdQ, ActionWrite, false, false},
+		{"access create denied", stdQ, ActionCreate, false, false},
+		{"access delete denied", stdQ, ActionDelete, false, false},
+		{"access admin-action denied", stdQ, ActionAdmin, false, false},
+		// An elevated admin is the one write-capable principal.
+		{"access write allowed for active admin", stdQ, ActionWrite, true, true},
+		{"access delete allowed for active admin", stdQ, ActionDelete, true, true},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := evalAllow(tc.q, tc.action, tc.admin); got != tc.wantAllow {
+				t.Errorf("allow=%v, want %v (action=%q active_admin=%v)", got, tc.wantAllow, tc.action, tc.admin)
+			}
+		})
+	}
+}

zddc/internal/policy/standing_config_test.go

@@ -72,3 +72,47 @@ func TestStandingConfigEdit(t *testing.T) {
 		}
 	}
 }
+
+// TestStandingConfigEdit_WormDemotionIsTwoStep documents the (intended)
+// composition that a single-action view of the decider hides: a config-editor
+// who administers a WORM zone cannot write a WORM record directly, but CAN
+// demote the zone by editing its own .zddc, after which an ordinary write is
+// no longer clamped. WORM is thus tamper-evident to its policy owner, not
+// tamper-proof. Pinned so the behavior is an explicit, tested decision — if a
+// deployment ever needs WORM markers immutable except under elevation, this is
+// the test that must change alongside gating worm: relaxation behind
+// IsActiveAdmin in policy.InternalDecider.Allow.
+func TestStandingConfigEdit_WormDemotionIsTwoStep(t *testing.T) {
+	d := &InternalDecider{}
+	dec := func(chain zddc.PolicyChain, p zddc.Principal, action string) bool {
+		ok, _ := AllowActionFromChainP(context.Background(), d, chain, p, "/proj/probe", action)
+		return ok
+	}
+	alice := zddc.Principal{Email: "alice@x", Elevated: false} // config-editor, NOT elevated
+
+	// Before — alice administers a WORM zone (admins: + a non-nil worm list).
+	worm := zddc.PolicyChain{
+		Levels:     []zddc.ZddcFile{{Admins: []string{"alice@x"}, Worm: []string{}}},
+		HasAnyFile: true,
+	}
+	// The boundary holds: a direct WORM record write is denied unelevated...
+	if dec(worm, alice, ActionWrite) {
+		t.Error("unelevated config-editor must NOT directly write a WORM record")
+	}
+	// ...but she CAN edit the zone's policy (VerbA) — the lever for demotion.
+	if !dec(worm, alice, ActionAdmin) {
+		t.Error("config-editor should be able to edit the WORM zone's .zddc unelevated")
+	}
+
+	// After — alice has rewritten that .zddc: inherit:false dropped the
+	// embedded worm: and her acl now grants rwcd (the post-edit cascade the
+	// file API persists). The subtree is no longer WORM, so her write lands —
+	// still unelevated. This is step two of the intended demotion.
+	demoted := zddc.PolicyChain{
+		Levels:     []zddc.ZddcFile{{ACL: zddc.ACLRules{Permissions: map[string]string{"alice@x": "rwcd"}}}},
+		HasAnyFile: true,
+	}
+	if !dec(demoted, alice, ActionWrite) {
+		t.Error("after the config-editor demotes the zone, the ordinary write should be allowed")
+	}
+}

zddc/internal/zddc/embedded_neutral_test.go

@@ -0,0 +1,45 @@
+package zddc
+
+import "testing"
+
+// TestEmbeddedDefaults_LosslessUnderSerialization pins the invariant that
+// makes it safe for policy.SerializableChain to drop PolicyChain.Embedded on
+// the wire (and for policy.InternalDecider.Allow to reconstruct a chain from
+// AllowInput without it).
+//
+// The decision path consults chain.Embedded at two sites:
+//   - worm.go (WormZoneGrant): folds in a top-level chain.Embedded.Worm.
+//   - roles.go (lookupRoleMembers / pathRoles): reads chain.Embedded.Roles.
+//
+// Today both are no-ops only because the baked-in baseline (EmbeddedDefaults,
+// the root of every cascade — internal/zddc/defaults/.zddc) declares no
+// top-level `worm:` and no role members (WORM is declared via the `paths:`
+// tree, which lands in chain.Levels, not chain.Embedded). If a future default
+// adds either, those contributions would be SILENTLY ignored by an external
+// OPA (it never receives Embedded) and by the InternalDecider over a
+// serialized chain — an authz divergence with no error. This test fails loudly
+// at that moment so the change is paired with serializing PolicyChain.Embedded
+// (one field on SerializableChain) before it ships.
+func TestEmbeddedDefaults_LosslessUnderSerialization(t *testing.T) {
+	e, err := EmbeddedDefaults()
+	if err != nil {
+		t.Fatalf("EmbeddedDefaults: %v", err)
+	}
+
+	if e.Worm != nil {
+		t.Errorf("embedded baseline declares a top-level worm: %v — it is read at "+
+			"decision time (WormZoneGrant) but dropped by policy.SerializableChain, "+
+			"so external OPA and the reconstructed InternalDecider chain would "+
+			"silently ignore it. Declare WORM via paths: (→ chain.Levels) or "+
+			"serialize PolicyChain.Embedded.", e.Worm)
+	}
+
+	for name, role := range e.Roles {
+		if len(role.Members) > 0 {
+			t.Errorf("embedded baseline role %q has members %v — read at decision "+
+				"time (chain.Embedded.Roles in roles.go) but dropped by "+
+				"policy.SerializableChain. Keep embedded roles member-less or "+
+				"serialize PolicyChain.Embedded.", name, role.Members)
+		}
+	}
+}

zddc/internal/zddc/ensure.go

@@ -200,10 +200,11 @@ func EnsureCanonicalAncestors(fsRoot, target, principalEmail string, perm fs.Fil
 
 		// Determine if this newly-created ancestor is an auto-own
 		// position and whether it should be fenced (inherit: false).
-		// Resolved via the .zddc cascade — internal/zddc/defaults/
-		// carries the canonical "working/staging auto-own + per-user
-		// homes fenced + incoming auto-own" convention, and any
-		// on-disk .zddc can override per-directory.
+		// Resolved via the .zddc cascade — the embedded defaults
+		// (internal/zddc/defaults/) declare auto_own at the working/
+		// staging/ incoming/ reviewing/ <party> homes but do NOT fence
+		// them (they are shared team folders); an on-disk .zddc can opt
+		// a directory into fencing per-directory with auto_own_fenced.
 		_ = parentSegs // depth-tracking no longer needed
 		_ = i
 		autoOwn := AutoOwnAt(fsRoot, pathSoFar)
@@ -222,12 +223,11 @@ func EnsureCanonicalAncestors(fsRoot, target, principalEmail string, perm fs.Fil
 
 	// Seed auto-own .zddc on the canonical positions that were freshly
 	// created. Skip if no principal email is available (anonymous or
-	// system writes). The fenced variant is used at per-user home
-	// folders under working/ — private by default; owner can later
-	// edit the .zddc to add collaborators. Role grants (from the
-	// cascade's auto_own_roles list) are written alongside the
-	// creator email so role-level peer authority survives without
-	// needing a subtree-admin grant.
+	// system writes). The fenced variant (inherit:false, private to the
+	// creator) is an opt-in the default tree does not use — see
+	// AutoOwnFencedAt. Role grants (from the cascade's auto_own_roles
+	// list) are written alongside the creator email so role-level peer
+	// authority survives without needing a subtree-admin grant.
 	if principalEmail != "" {
 		for _, c := range freshlyCreated {
 			if !c.autoOwn {

zddc/internal/zddc/file.go

@@ -25,12 +25,13 @@ import (
 // (e.g. a vendor folder where only the vendor and the doc controller
 // should have access regardless of broader project-level grants).
 //
-// Federal deployments running the bundled `access_federal.rego` get
-// parent-deny-is-absolute / NIST AC-6 semantics; the directive's
-// fence-style "reset" should be avoided there because it would let a
-// leaf widen access an ancestor refused. The cascade tracer at
-// /.profile/effective-policy reports `chain.visible_start` so an
-// operator can verify which level a fence is actually cutting off.
+// A deployment running an external OPA with ancestor-deny-absolute
+// (NIST AC-6) semantics should avoid the directive's fence-style "reset",
+// since under that posture it would let a leaf widen access an ancestor
+// refused. (zddc-server ships only the read-ACL skeleton at --print-rego;
+// an AC-6 policy is the operator's own Rego.) The cascade tracer at
+// /.profile/effective-policy reports `chain.visible_start` so an operator
+// can verify which level a fence is actually cutting off.
 //
 // Inherit is per-level and not itself cascading: an ancestor's
 // `inherit: false` does not transitively block descendants from
@@ -228,12 +229,15 @@ type ZddcFile struct {
 	// created. Empty (nil) inherits via cascade.
 	AutoOwn *bool `yaml:"auto_own,omitempty" json:"auto_own,omitempty"`
 
-	// AutoOwnFenced augments AutoOwn: when true, the generated .zddc
-	// is written with `inherit: false` so the new directory is
-	// private to its creator (ancestor ACL grants don't apply). Used
-	// for per-user home folders under working/<email>/. Default
-	// (nil/false) writes a non-fenced auto-own .zddc — ancestor
-	// admin grants still apply.
+	// AutoOwnFenced augments AutoOwn: when true, the generated .zddc is
+	// written with `inherit: false` so the new directory is private to its
+	// creator (ancestor ACL grants don't cascade in). It is an OPT-IN an
+	// operator can set on any auto_own position; the current embedded default
+	// tree does NOT set it anywhere — the working/ staging/ incoming/
+	// reviewing/ <party> homes are auto-owned but UNFENCED, so ancestor grants
+	// (e.g. `project_team: cr` at working/) still cascade in, making them
+	// shared team folders rather than private per-user sandboxes. Default
+	// (nil/false) writes a non-fenced auto-own .zddc.
 	AutoOwnFenced *bool `yaml:"auto_own_fenced,omitempty" json:"auto_own_fenced,omitempty"`
 
 	// AutoOwnRoles augments AutoOwn with role-level grants: when set,

zddc/internal/zddc/special.go

@@ -32,20 +32,21 @@ func WriteAutoOwnZddc(dir, principalEmail string, roles []string) error {
 }
 
 // WriteAutoOwnZddcFenced is the same as WriteAutoOwnZddc but additionally
-// sets `acl.inherit: false` — fencing ancestor cascade grants. Used at
-// per-user home folders under working/ where the convention is "private
-// by default; owner edits the file to add collaborators."
+// sets `acl.inherit: false` — fencing ancestor cascade grants so the new
+// directory is private to its creator. This is the OPT-IN private-home form:
+// the current embedded default tree does NOT use it (the working/staging/
+// incoming/reviewing party homes are unfenced and shared — see AutoOwnFenced
+// in file.go). An operator opts in by setting auto_own_fenced on a position.
 //
-// Without the fence, an ancestor `*: r` (e.g. a project-root grant for
-// authenticated users) would let any user read every other user's
-// working subfolder via cascade — defeating the per-user sandbox.
+// With the fence, an ancestor grant (e.g. `project_team: cr` at working/)
+// does NOT cascade in, so only the creator (and any roles passed below) can
+// reach the directory.
 //
 // roles is the same as for WriteAutoOwnZddc — listed roles get rwcda
 // alongside the creator, and like the creator grant they're INSIDE
 // the fence (only resolvable if the role is defined at this level or
 // in chain.Embedded, since ancestor role definitions are hidden by
-// inherit:false). Typically callers using the fenced variant pass nil
-// roles — per-user homes don't need peer authority.
+// inherit:false). Callers using the fenced variant typically pass nil roles.
 func WriteAutoOwnZddcFenced(dir, principalEmail string, roles []string) error {
 	return writeAutoOwn(dir, principalEmail, true, roles)
 }