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ZDDC 8b6a2dc3e3 feat(zddc-server): apps fetch+cache subsystem with cascade overrides
Adds internal/apps/ package serving the five tool HTMLs at virtual paths
based on the surrounding folder name convention:

  archive      every directory (multi-project, project, archive, vendor)
  classifier   any Incoming/Working/Staging directory and subtree
  mdedit       any Working directory and subtree
  transmittal  any Staging directory and subtree
  landing      only at deployment root

The current-stable build of every tool is //go:embed'd into the binary
at compile time — that's the default with zero config. Operators
override per-directory via .zddc apps: entries; closer-to-leaf wins.

Spec syntax (in any apps: value):

  stable / beta / alpha / :stable          channel
  v0.0.4 / v0.0 / v0 / :v0.0.4              version
  https://my-mirror/releases                URL prefix only
  https://my-mirror/releases:beta           URL prefix + channel
  https://my-fork/archive.html              terminal full URL
  ./local.html / /abs/path.html             terminal local path

The special apps.default key provides a baseline URL prefix and channel
inherited by any app not overridden per-name. Per-axis cascade: a deeper
.zddc can override the URL, the channel, or both.

Cascade walks root→leaf; default applies first at each level, then the
per-app entry. Terminal sources (paths and full .html URLs) short-circuit
composition; deeper non-terminal entries override parent terminals.

URL sources fetch once on first request and cache forever in
<ZDDC_ROOT>/_app/<host>/<path> — different upstreams with the same
filename stay distinct. No background refresh, no SHA-256 verification:
operators delete the cache file to force a refetch. Concurrent misses
for the same source dedupe via a 30-line hand-rolled singleflight.

Per-request override: any user can append ?v=<spec> to a tool URL
(e.g. ?v=beta, ?v=v0.0.4, ?v=:alpha, ?v=https://mirror/releases:beta)
to ask for a different build for one request. Security: ?v= serves
ONLY versions already in the cache (cache miss returns 404; path
sources are rejected outright with 400). Users cannot trigger
arbitrary upstream fetches via crafted URLs.

Failed URL fetches (network down, 5xx) fall back to embedded with a
one-time WARN log. The X-ZDDC-Source response header reports what
served: fetch:URL / cache:URL / path:/abs / embedded:<app>@<build>.

Wire-in (cmd/zddc-server/main.go): dispatch routes <dir>/<app>.html
through apps.MatchAppHTML + AppAvailableAt + apps.Server.Serve when
no real file exists. Direct URL access to /_app/... is blocked at
the dispatch layer — cached files must go through the apps resolver
so they get correct Content-Type and ACL gating.

Schema (internal/zddc/file.go): ZddcFile gains Apps map[string]string
for cascade overrides. Validator (internal/zddc/validate.go) accepts
the special "default" key alongside the five canonical app names and
all spec forms.

Removes ZDDC_APPS_* env vars (no admin UI, no refresh interval, no
upstream allow-list — the simpler model has fewer knobs).

40+ unit tests across the new package: parser shapes, cascade
resolution with default+per-app interactions, terminal short-circuit
semantics, ?v= cache-only enforcement, embedded fallback, atomic
cache writes, singleflight dedup. Plus end-to-end dispatch tests in
cmd/zddc-server/main_test.go.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-01 15:25:25 -05:00
archive feat(html): TIFF and ZIP listing previews + favicon in app headers 2026-05-01 15:23:26 -05:00
classifier feat(html): TIFF and ZIP listing previews + favicon in app headers 2026-05-01 15:23:26 -05:00
helm feat: example helm charts for zddc-server (production + dev) 2026-04-30 09:48:02 -05:00
landing feat(landing): groups + click-to-open redesign 2026-05-01 15:23:42 -05:00
mdedit feat(html): TIFF and ZIP listing previews + favicon in app headers 2026-05-01 15:23:26 -05:00
pandoc Initial commit 2026-04-27 11:05:47 -05:00
shared feat(html): TIFF and ZIP listing previews + favicon in app headers 2026-05-01 15:23:26 -05:00
tests feat(landing): groups + click-to-open redesign 2026-05-01 15:23:42 -05:00
transmittal feat(html): TIFF and ZIP listing previews + favicon in app headers 2026-05-01 15:23:26 -05:00
website refactor: drop install scripts; containerize zddc-server build 2026-05-01 15:24:52 -05:00
zddc feat(zddc-server): apps fetch+cache subsystem with cascade overrides 2026-05-01 15:25:25 -05:00
.gitignore refactor: HTML tools live in website/releases/ as static files + symlink hierarchy 2026-04-30 09:40:16 -05:00
AGENTS.md docs: align with simplified release model 2026-04-30 09:56:34 -05:00
ARCHITECTURE.md docs: align with simplified release model 2026-04-30 09:56:34 -05:00
build.sh refactor: drop install scripts; containerize zddc-server build 2026-05-01 15:24:52 -05:00
CLAUDE.md docs: align with simplified release model 2026-04-30 09:56:34 -05:00
dev-server Initial commit 2026-04-27 11:05:47 -05:00
freshen-channel feat: freshen-channel helper and channel-discipline protocol 2026-04-27 13:43:42 -05:00
LICENSE.txt Initial commit 2026-04-27 11:05:47 -05:00
package.json Initial commit 2026-04-27 11:05:47 -05:00
playwright.config.js feat(tools,build): in-flight HTML-tool reworks and build-infra updates 2026-04-29 12:52:27 -05:00
README.md docs: align with simplified release model 2026-04-30 09:56:34 -05:00

Zero Day Document Control (ZDDC)

The Universal Distributed Filing Cabinet

ZDDC is an information management convention plus a small set of single-file HTML tools. Every deliverable's filename encodes its tracking number, revision, status, and title; every transmittal folder is date-prefixed and self-describing. A plain shared folder becomes a fully searchable, auditable archive — no server, no database, no software required to read it.

The name "Zero Day Document Control" comes from the convention itself — adopt it on day zero of a project, with no setup time. The tools are optional interfaces around the structure; the structure works without them.

For end users: https://zddc.varasys.io/ introduces the project, links to all tool channels (stable / beta / alpha), and prints copy-paste shell snippets to install on a self-hosted deployment.

Tools

Tool What it does
Archive Browser Browse, search, and filter a project archive folder. Group by transmittal, export selections as ZIP.
Transmittal Creator Self-contained HTML transmittal records with SHA-256 checksums and optional digital signatures.
Document Classifier Spreadsheet-like bulk-renamer that copy/pastes with Excel and writes back to disk.
Markdown Editor Browser-based markdown editor with YAML front matter, TOC, and direct local file access.

Each tool is published in three channels (stable, beta, alpha) as static files committed under website/releases/, browsable at https://zddc.varasys.io/releases/. Append ?v=alpha, ?v=0.0.4 (exact), ?v=0.0 (latest patch), or ?v=0 (latest minor) to any deployment URL to switch versions for one request. See bootstrap/README.md for the install / pin / audit story.

File-naming convention

The full specification — filename format, tracking numbers, revision rules, status codes, folder naming, and the transmittal workflow — lives at https://zddc.varasys.io/reference.html.

Quick example: 123456-EL-SPC-2623_A (IFR) - Specification For Switchgear.pdf

Build & develop

git clone https://codeberg.org/VARASYS/ZDDC.git && cd ZDDC

sh build.sh                              # build all tools (writes to dist/ only)
sh archive/build.sh                      # build one tool

sh archive/build.sh --release            # cut stable; auto-bumps patch from last tag
sh archive/build.sh --release 0.1.0      # explicit version
sh archive/build.sh --release alpha      # cut alpha (mutable channel, no tag)
sh archive/build.sh --release beta       # cut beta

npm install && npx playwright install chromium && npm test    # tests
./dev-server start                       # cache-busting HTTP on :8000

Authoritative build/release docs are in AGENTS.md. Architecture notes (single-file rationale, JS module pattern, security model) are in ARCHITECTURE.md. zddc-server (optional Go HTTP server with ACL and a virtual archive index) is in zddc/README.md. Example Helm charts for deploying zddc-server (production + dev) are under helm/.

Contributing

ZDDC is an open source project hosted on Codeberg at https://codeberg.org/VARASYS/ZDDC. Bug reports, feature requests, and pull requests welcome.

ZDDC is designed for zero configuration to start and minimal configuration overall — feature proposals are filtered through that lens.

License

GNU Affero General Public License v3.0. Free to use, modify, and distribute, including commercially, under the terms of the license. Provided "as is" without warranty.