ZDDC/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Authoritative docs — read these first

This repo already has two thorough agent-facing references. Always consult them before working — they cover details intentionally omitted here:

• AGENTS.md — commands, build-system rules, per-tool parser quirks, testing gotchas, git/worktree workflow, release process, zddc-server notes
• ARCHITECTURE.md — single-file HTML pattern rationale, JS module/state patterns, per-tool architecture, security model

If something in this CLAUDE.md conflicts with those, those win — and please update them rather than letting drift accumulate.

Repo shape

This is a monorepo of independent tools, not one application:

• archive/, transmittal/, classifier/, mdedit/, landing/ — five self-contained HTML tools, each compiled to a single inlined HTML file in its own dist/. Naming: the first four output dist/tool.html; landing/ outputs dist/index.html (it's the project picker served at the root of zddc-server).
• zddc/ — Go HTTP server (separate sub-project, podman/podman-compose; Go 1.24+). Serves ZDDC_ROOT/index.html at GET / as the landing page; Accept: application/json on / returns the ACL-filtered project list.
• shared/ — base.css plus shared JS modules (zddc.js, hash.js, zddc-filter.js, theme.js, help.js) included by every tool's build, and build-lib.sh (POSIX sh helpers sourced by every tool's build.sh)
• website/ — published artifacts: index.html (root URL), releases/<tool>_v<X.Y.Z>.html (immutable stable archives), releases/<tool>_stable.html (symlink to current stable), releases/<tool>_{alpha,beta}.html (mutable channel files), plus bootstrap zips (install.zip, track-{alpha,beta,stable}.zip). --release is the only path to publishing — there is no website/dev/.
• tests/ — Playwright specs (Chromium only, requires File System Access API). tests/schema.spec.js validates transmittal.schema.json against canonical fixtures via ajv (only dev dep besides Playwright)

Most-used commands

sh build.sh                                 # build all five HTML tools (dist/ only)
sh tool/build.sh                            # build one (archive|transmittal|classifier|mdedit|landing)
sh tool/build.sh --release [version]        # cut stable; tag, write website/releases/<tool>_v<ver>.html, refresh _stable symlink
sh tool/build.sh --release alpha|beta       # cut channel build; overwrites website/releases/<tool>_<channel>.html (mutable, no tag)
npm test                                    # all Playwright specs (build first!)
npx playwright test <tool>                  # one spec
./dev-server start  # ./dev-server stop     # cache-busting HTTP on :8000

No lint/typecheck/format commands exist — vanilla JS + POSIX sh by design.

Things that bite if you forget

• dist/ is gitignored but force-committed (git add -f tool/dist/tool.html). Never hand-edit a dist/ file.
• Never write to website/index.html, website/releases/<tool>_v*.html, website/releases/<tool>_stable.html, or website/releases/<tool>_beta.html directly — promote via sh tool/build.sh --release [version|alpha|beta]. Stable releases write website/releases/<tool>_v<ver>.html (immutable) and refresh <tool>_stable.html; alpha/beta overwrite <tool>_<channel>.html in place. Exception: <tool>_alpha.html files — every plain tool/build.sh reasserts them as relative symlinks into <tool>/dist/, so dev builds stay clean in git. --release alpha overwrites the symlink with a real file; the next plain build re-symlinks.
• Always build before running tests — Playwright opens dist/tool.html via file://.
• </ in JS string/template literals breaks inline <script> embedding. shared/build-lib.sh provides escape_js_close_tags; every tool's build.sh runs JS through it before inlining.
• All ZDDC parsing/formatting/hashing goes through window.zddc (from shared/zddc.js + shared/hash.js + shared/zddc-filter.js). API: parseFilename, parseFolder, parseRevision, formatFilename, formatFolder, compareRevisions, isValidStatus, splitExtension, joinExtension, crypto.{sha256Hex, sha256String, sha256File, bytesToHex}, filter.{parse, matches}. File objects across tools use trackingNumber (string) and extension (string, no leading dot — use zddc.joinExtension(name, ext) to build a filename). Add edge cases to tests/zddc.spec.js, not per-tool tests.
• Two globals only: window.app (per-tool app state + modules) and window.zddc (shared library). No others — anything that crosses tool boundaries goes through one of these.
• Worktrees live at ~/src/zddc-<branch>. Check git worktree list before starting a feature branch; never git checkout/switch inside a worktree another agent might be using.
• Build scripts are POSIX sh with set -eu, not bash. concat_files takes positional args only.