# AGENTS.md — ZDDC

## Commands

```bash
# Build all tools (writes to dist/ only)
sh build.sh

# Build single tool
sh tool/build.sh              # archive | transmittal | classifier | mdedit | landing

# Cut a stable release (auto-increments patch version, tags, writes to website/releases/)
sh tool/build.sh --release
sh tool/build.sh --release 1.2.0      # explicit version

# Cut an alpha/beta channel build (mutable, no git tag)
sh tool/build.sh --release alpha
sh tool/build.sh --release beta

# Release all tools at once
sh build.sh --release [version|alpha|beta]

# Test all tools
npm test

# Test single tool
npx playwright test tool        # archive | transmittal | classifier | mdedit

# Dev server (cache-busting HTTP, on port 8000)
./dev-server start
./dev-server stop
```

No lint, typecheck, or format commands exist — the project is plain sh + vanilla JS.

## Architecture

Five independent single-file HTML tools (`archive`, `transmittal`, `classifier`, `mdedit`, `landing`). Each compiles to one self-contained `.html` in `dist/` with all CSS and JS inlined — the first four name their output `dist/tool.html`; `landing` writes `dist/index.html` (it's served at `/` by `zddc-server`). Tools share a small set of canonical helpers in `shared/` (filename parsing, ZDDC filter UI, theme, help) — see "Shared modules" below.

```
tool/
  css/           source stylesheets (concatenated in order)
  js/            vanilla JS IIFEs (concatenated in order)
  template.html  placeholder markers: {{CSS_PLACEHOLDER}}, {{JS_PLACEHOLDER}}, {{BUILD_LABEL}}
  build.sh       assembles dist/tool.html
  dist/tool.html generated output — committed with `git add -f`

shared/
  base.css        CSS tokens and primitives included first by every tool's CSS build
  zddc.js         canonical filename/folder/revision parsers, formatters, status validation
  zddc-filter.js  shared ZDDC project/status filter UI module
  theme.js        light/dark theme switcher
  help.js         shared help dialog module
  build-lib.sh    POSIX sh helpers (ensure_exists, concat_files, build_timestamp)
                  sourced by every tool's build.sh via: . "$root_dir/../shared/build-lib.sh"

website/
  index.html                       current stable landing (root URL)
  releases/
    <tool>_v<X>.<Y>.<Z>.html       immutable stable release archives
    <tool>_stable.html  -> ...     symlink to current stable (highest semver)
    <tool>_alpha.html              mutable; overwritten by --release alpha
    <tool>_beta.html               mutable; overwritten by --release beta
  install.zip                      drop-in self-contained install (5 stable HTMLs + _template/ stubs)
  track-stable.zip                 level-2 stubs that track the current-stable channel
  track-alpha.zip                  level-2 stubs that track the alpha channel
  track-beta.zip                   level-2 stubs that track the beta channel

bootstrap/
  level1.html.tmpl   per-project bootstrap template (relative ../<tool>.html)
  level2.html.tmpl   level-2 channel-tracking bootstrap template
  README.md          install / channel / pin docs
```

**Critical:** `dist/` files are gitignored but force-committed (`git add -f`). Never edit them directly.

## Shared CSS (`shared/base.css`)

Included as the **first** positional arg to every tool's `concat_files` CSS call. Provides:
- `:root` CSS custom properties — `--primary`, `--bg`, `--text`, `--border`, `--font`, etc.
- Brand color: `--primary: #2a5a8a` (matches zddc.varasys.io)
- Button primitive: `.btn`, `.btn-primary`, `.btn-secondary`, `.btn-sm`, `.btn-lg`, `.btn-link`
- `.app-header` + `.app-header__title` chrome rules
- `.build-timestamp`, `.hidden`, `.truncate`, webkit scrollbars

**Do not** define these in any tool's own CSS — they come from shared.

**Toast CSS** lives in `classifier/css/base.css` only (classifier is the only tool that uses toasts).

## Transmittal CSS quirks

- `transmittal/css/base.css` overrides `html { font-size: 16px }` inside `@media screen` — this must stay. `shared/base.css` sets `14px`; transmittal's floating labels are rem-based and were designed for 16px.
- The floating label position is defined in `transmittal/css/forms.css`, not Tailwind classes. If adding new Tailwind classes to `template.html`, add them to `transmittal/css/utilities.css` too — there is no Tailwind build step.

## Build system rules

- Every `build.sh` sources `shared/build-lib.sh` first (provides `ensure_exists`, `concat_files`, `build_timestamp`). Set `root_dir` before sourcing.
- Build scripts use **POSIX sh** (`#!/bin/sh` with `set -eu`), not bash.
- `concat_files` accepts **positional args only** (not array names).
- `awk` processes `template.html`, replacing `{{PLACEHOLDER}}` markers and stripping CDN `<script>`/`<link>` tags (pattern: `https?://`)
- `{{BUILD_LABEL}}` is substituted in all five tools via `gsub` in awk (use `gsub`, not `print` — the placeholder is inline in an HTML line). Value is `Built: <timestamp> BETA` for dev builds, `v<version>` for stable releases, and `<channel> · <date> · <sha>` for alpha/beta channel builds; computed before the awk step. The shared `is_red` flag controls whether the label is wrapped in a red+bold `<span>` (true for dev/alpha/beta, false for stable).
- Cleans up temp files via `trap cleanup EXIT`

**`</` escaping is mandatory.** Any JS containing `</tag>` inside string or template literals will break inline `<script>` embedding. Run:
```bash
sed 's#</#<\\/#g' "$input_js" > "$safe_js"
```
Required for any new tool with vendor JS or JS containing HTML template literals.

## JS module pattern

All JS is vanilla, no bundlers. Files are IIFEs, registered on `window.app.modules`. Load order = declaration order in `build.sh`. `window.app` is the only global.

```javascript
(function() {
    window.app.modules.mymodule = { ... };
})();
```

**Exception:** archive uses plain globals (`APP_STATE`, top-level functions) — not the IIFE/modules pattern.

## ZDDC filename parsers

All parsing/formatting goes through `shared/zddc.js`, exposed as `window.zddc`. Tools call it directly — no per-tool wrappers.

`window.zddc` exports:
- `parseFilename(name)` → `{ trackingNumber, revision, status, title, extension, valid } | null` (extension WITHOUT leading dot)
- `parseFolder(name)` → `{ date, trackingNumber, status, title, valid } | null`
- `parseRevision(rev)` → `{ base, modifier, modifierType, modifierNumber, isDraft, modifierIsDraft, full }`
- `compareRevisions(a, b)` → number (canonical sort order)
- `formatFilename(parts)` / `formatFolder(parts)` — round-trips parsed output
- `isValidStatus(code)` — accepts known status codes plus `---`

All file objects across tools use `file.trackingNumber` (string) and `file.extension` (string, **no leading dot**, e.g. `'pdf'` not `'.pdf'`). When concatenating into a filename, write `name + '.' + ext`.

Coverage lives in `tests/zddc.spec.js` (47 cases). Add new edge cases there, not in tool tests.

## Testing quirks

- Playwright + Chromium only (File System Access API requirement)
- Tests open `dist/tool.html` via `file://` protocol — **always build before testing**
- File System Access API is mocked via `page.addInitScript()` using `tests/fixtures/mock-fs-api.js`
- Use `waitUntil: 'load'` or `'domcontentloaded'` not `'networkidle'` — bundled scripts keep the network "active"
- Archive's `#noDirectoryMessage` empty-state overlay is `position: absolute; top: 50px` — it must clear the header or it will block button clicks in tests

## ZDDC filename convention

Format: `trackingNumber_revision (status) - title.extension`

- `trackingNumber`: no spaces or underscores (e.g. `123456-EL-SPC-2623`)
- `revision`: `A`, `B`, `0`; draft prefix `~`; modifiers `+C1`, `+B1`, `+N1`, `+Q1`
- `status`: `IFA IFB IFC IFD IFI IFP IFR IFU REC RSA RSB RSC RSD RSI` or `---`
- Folder names prefix with date: `2025-10-31_trackingNumber (status) - title`

## Git workflow

- Feature-branch workflow; squash-merge feature branches to `main`
- Conventional commits: `feat(archive): ...`, `fix(transmittal): ...`
- Release tags: `archive-v1.0.0` (per-tool semver)
- Commit dist files: `git add -f tool/dist/tool.html`

### Releasing — channels and layout

Three channels:

- **Stable**: versioned, immutable. `sh tool/build.sh --release [version]` writes `website/releases/<tool>_v<version>.html`, refreshes the `<tool>_stable.html` symlink, and tags `<tool>-v<version>`. Skips automatically if source has not changed since the latest tag. Pass an explicit version to override auto-increment.
- **Beta**: mutable. `sh tool/build.sh --release beta` overwrites `website/releases/<tool>_beta.html` in place. No tag. The on-page label is `beta · <date> · <sha>` so the source is recoverable from git via the SHA.
- **Alpha**: mutable, analogous. `sh tool/build.sh --release alpha`. **Also**: every plain (non-release) `tool/build.sh` invocation copies the just-built dist file into `website/releases/<tool>_alpha.html`, so the alpha hyperlinks on the website always serve the latest dev build. Plain copy (not symlink) so the file is reachable regardless of how the web server mounts the working tree (the canonical Caddy setup at `/etc/containers/systemd/caddy.container` mounts only `website/` read-only and cannot follow `../<tool>/dist/` symlinks). Side-effect: every dev build dirties the corresponding `_alpha.html` in `website/releases/`; commit those alongside the source change or `git checkout` them before pushing. Copied alpha pages carry the dev label `Built: <ts> BETA` (red) since the dist file does; `--release alpha` overwrites with the formal `alpha · <date> · <sha>` label.

Stable releases do **not** automatically clobber `<tool>_alpha.html` / `<tool>_beta.html` — those keep whatever was last built into them. Use `./freshen-channel <tool> <channel>` (see "Freshen helper" below) to drag a channel forward to current stable; never `git checkout` the main worktree by hand for this.

After cutting a stable release, run `git push --tags` to publish the tag.

The "skip if no source change since last tag" guard for stable releases compares **HEAD** to the latest tag — uncommitted working-tree changes are invisible. If you edit a tool and want a stable release to actually fire, commit the change first; otherwise the build prints `no source changes since <tool>-vX.Y.Z — skipping` and exits 0. Alpha and beta channel builds always rebuild (no skip check).

Agents must **never** write to `website/releases/<tool>_v*.html`, `website/releases/<tool>_stable.html`, `website/releases/<tool>_beta.html`, or `website/index.html` directly — always go through `--release` or `./freshen-channel`. (The `<tool>_alpha.html` files are an exception: every plain build rewrites them with a copy of the current dist, as described above.)

`landing/build.sh --release <version>` additionally writes `website/index.html` (the root URL of zddc.varasys.io).

### Channel discipline (MUST rules)

The build system does not enforce these. Treating channels carelessly defeats the point of having three. Be disciplined.

1. **Stable doesn't regress.** No known-broken features that worked in the previous stable. If you ship `v0.0.5` with a bug, the path forward is `v0.0.6` with a fix — never edit `v0.0.5` in place. Stable files are immutable.
2. **No backports.** Don't try to patch an older stable version. Always cut a new stable at a higher version. Users pinned to the old version stay pinned by their own choice; they can move forward when they want.
3. **Alpha and beta are mutable.** Document this anywhere you invite users to test them. Pinning `?v=alpha` (or `_alpha.html`) in a production deployment is a mistake; it gets rebuilt without notice.
4. **Stale-channel rule.** Users tracking alpha (or beta) MUST never see a build older than current stable. After every stable release, run `./freshen-channel <tool> alpha` and `./freshen-channel <tool> beta` so each channel is at-least-current. This is not optional.
5. **Hotfix path.** For critical bugs: fix on `main`, cut a new stable (no beta soak required), then freshen alpha + beta. Tag the commit message `fix:` or include "hotfix" so the intent is visible in `git log`.
6. **Beta soak before promoting (recommended).** Give a beta a few days of exposure before cutting the same code as stable. Not enforced; use judgment for trivial changes.

### Freshen helper

`./freshen-channel <tool> <channel>` rebuilds the alpha or beta channel of a tool from its current stable tag. Use it after every stable release (rule 4 above) and any other time alpha/beta has fallen behind stable.

```sh
./freshen-channel archive alpha
./freshen-channel transmittal beta
```

What it does:

1. Finds the latest `<tool>-v*` tag.
2. Creates a temporary git worktree at that tag — does **not** touch the main worktree's HEAD or working tree.
3. Runs `<tool>/build.sh --release <channel>` inside the worktree.
4. Copies the resulting `<tool>_<channel>.html` into the main repo's `website/releases/`.
5. Removes the worktree.

The on-page label of the freshened build is `<channel> · <today> · <stable-tag-sha>` — the SHA pins which stable was used as the source, recoverable via `git checkout`.

Note: the build pipeline used is the one **at the tag**, not on `main`. That is intentional (pure reproducibility). If you have made build-system improvements since stable was cut and want the freshen to use them, cut a new stable first.

### Bootstrap zips

`build.sh` regenerates three downloadable zips into `website/` on every invocation:

- `install.zip` — 5 current-stable HTMLs at root + `_template/` directory containing 4 level-1 bootstrap stubs (per-project use). Skipped if any tool has no stable release yet.
- `track-{alpha,beta,stable}.zip` — 5 level-2 stubs each, hardcoded to fetch the named channel from `zddc.varasys.io/releases/`. Drop one over a deployment root to switch the whole site to that channel.

See `bootstrap/README.md` for the install / pin / audit story.

### Worktrees

Use `git worktree` to run multiple agents on separate branches simultaneously without filesystem collisions.

- Worktrees live at `~/src/zddc-<branch-name>` (sibling of the main clone)
- Before starting work on a feature branch, check `git worktree list`; if no worktree exists, create one: `git worktree add ~/src/zddc-<branch-name> -b <branch-name>`
- All edits, builds (`sh build.sh`), and tests (`npm test`) run from within the worktree directory — build scripts use relative paths so this works correctly
- The `dist/` force-commit rule (`git add -f`) applies per-worktree
- After the branch is merged, clean up: `git worktree remove ~/src/zddc-<branch-name>` then delete the branch
- Never run `git checkout` or `git switch` inside a worktree that another agent may be using

## Transmittal-specific

- Two-phase hydration: `populateStatic()` before publish, `hydrate()` on load of published file
- Reactive state via Proxy — `app.state.mode = 'view'` auto-notifies subscribers
- Runtime CDN loads (jszip, docx-preview, xlsx) are allowed only for the optional DOCX/XLSX preview; core features work offline
- Published payload stored in `<script id="transmittal-data" type="application/json">`

## mdedit-specific

- `css/tailwind-utils.css` is a pre-generated static subset (~80 classes). Add new Tailwind classes here; do not re-run Tailwind.
- Toast UI Editor v3.2.2 is bundled in `vendor/`; `template.html` loads it from CDN for dev convenience
- `</` escaping is essential: `sed 's#</#<\\/#g'` runs on both app JS and vendor JS at build time

## zddc-server

Go HTTP server sub-project living at `zddc/`. Replaces `caddy file-server --browse` for ZDDC archives.

### Build

```sh
# Build the container image (from the zddc/ directory)
podman build -t zddc-server zddc/

# Or inside the zddc/ directory:
podman build -t zddc-server .
```

### Run (development)

```sh
ZDDC_DATA_DIR=/path/to/your/archive podman-compose -f zddc/podman-compose.yaml up --build
```

### Key environment variables

| Variable | Default | Purpose |
|---|---|---|
| `ZDDC_ROOT` | *(required)* | Path to served file tree |
| `ZDDC_ADDR` | `:8443` | Bind address |
| `ZDDC_EMAIL_HEADER` | `X-Auth-Request-Email` | Header set by upstream proxy with user email (oauth2-proxy / nginx auth-request convention) |
| `ZDDC_INDEX_PATH` | `.archive` | Virtual archive index URL segment |
| `ZDDC_LOG_LEVEL` | `info` | Logging verbosity |
| `ZDDC_CORS_ORIGIN` | `https://zddc.varasys.io` | Comma-separated CORS allowlist; empty value disables CORS. Default lets tools served from zddc.varasys.io call back into a customer-deployed server. |

### Release tagging

Two coordinated steps — git tag for auditability, then local image build:

```sh
git tag zddc-server-v0.0.4
git push origin zddc-server-v0.0.4
sh release-image.sh 0.0.4                # default: alpha → :0.0.4 :alpha
sh release-image.sh 0.0.4 beta           # beta cascade  → :0.0.4 :beta :alpha
sh release-image.sh 0.0.4 stable         # stable cascade → :0.0.4 :stable :beta :alpha
```

**Default channel is `alpha`** so `:stable` never advances by accident
during active development. Pass `beta` to soak; pass `stable` only when
deliberately promoting. Cascades:

- `alpha` → `:<version> :alpha`
- `beta`  → `:<version> :beta :alpha`
- `stable` → `:<version> :stable :beta :alpha`

Prerequisite: `podman login codeberg.org` (one-time, with a Codeberg
personal token scoped `package:write`).

There is no CI for this — `.woodpecker.yml` was removed in favor of
local-build-and-push because solo workflow benefits from one canonical
path that fails loudly and visibly on the developer's terminal.

### Notes

- No external test framework yet — Go unit tests run with `go test ./...` inside `zddc/` (requires Go 1.24+)
- The container image does NOT require Go on the host — the Containerfile uses a multi-stage build
- Portfolio files (`*.portfolio`) in the served tree appear as virtual group directories
- Every folder exposes a `.archive` virtual directory backed by the same global index — the depth in the URL only matters so HTML produced for offline use can reach `.archive/` via `../.archive/` relative links and have the browser resolve them before the request hits the server. The flat listing emits two redirect entries per tracking number: `<tracking>.html` (highest base rev) and `<tracking>_<rev>.html` (each specific base rev). Both redirect to the first chronologically received copy of the named revision. Modifier files (`<tracking>_<rev>+C1.html` etc.) remain reachable via the resolver but are not surfaced in the listing — they're return traffic, not primary documents. ACL is the only filter: the listing endpoint is gated by the contextPath's `.zddc` chain, and each entry is then filtered against the ACL of its resolved file's directory; per-target denials return 404 rather than 403 to avoid leaking that the tracking number exists in another subtree
- ACL is enforced via cascading `.zddc` YAML files; authentication is delegated to the upstream proxy via the `X-Auth-Request-Email` header (configurable with `ZDDC_EMAIL_HEADER`)
- `.zddc` schema also supports a top-level `admins:` glob list, peer to `acl.allow`/`acl.deny`. Honored **only** at the root `.zddc` (subdir `admins` entries are ignored to prevent privilege escalation via subtree write access). Drives the built-in debug dashboard at `/.admin/` (sub-routes: `/whoami`, `/config`, `/logs`); non-admin requests get 404 so the page is invisible. See `zddc/README.md` § "Admin Debug Page".
- **Reserved entry prefixes** under `ZDDC_ROOT`: `.`-prefixed entries are excluded from listings AND 404 on direct fetch (only `.archive` and `.admin` are exempt) — for invisible side-state like dev-shell home dirs. `_`-prefixed entries are excluded from listings only — for operator scaffolding like install.zip's `_template/` that's still reachable by direct URL. Drop side-state under `_` if it should be linkable; under `.` if it should be unreachable.