repo-mailbox/CLAUDE.md
Kjell Tore Guttormsen 316b8acdd2 feat(engine): retire a broadcast with coord-send --retract
Nothing could remove a message from _broadcast/inbox/. coord-done is
directed-only and never touches the broadcast queue, so the backlog could
only grow: every new repo received the entire standing history at its first
session, including announcements that had since become false.

--retract <filename> archives the message into _broadcast/archive/, so no
future repo is served it. Three deliberate limits, all pinned by tests:

- Un-send, not recall. Repos that already received it keep it;
  _broadcast/seen/ is delivery history and is left untouched.
- Only the sender may retract (from: must match the repo identity). --from
  overrides it, as everywhere else in the engine, which makes the check an
  accident guard rather than a security boundary.
- Nothing is deleted, mirroring coord-done. Retracting twice is a no-op.

The branch runs before every send-side validation and before the stdin body
read, since a retract carries no subject and no body.

Selftest 70 -> 82 (new section 19). Also fixes two README defects the
feature exposed: the install command still named coord@ after the v0.3.0
rename, and the docs advised pruning _broadcast/inbox/ by hand, which
contradicted the rule that the script owns mailbox files.
2026-07-25 15:11:47 +02:00

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3.8 KiB
Markdown

# repo-mailbox
Renamed from `coord` in v0.3.0. The plugin/repo is `repo-mailbox`; the CLI
(`coord-send.sh`, `coord-inbox.sh`, `coord-done.sh`), the mailbox root
(`~/.claude/coord/`) and `CLAUDE_COORD_DIR` deliberately kept their names —
they are the transport protocol, not the product.
## Context
Local inter-repo coordination mailbox for Claude Code, packaged as a
marketplace plugin. Three components, one boundary:
- **Engine (`scripts/*.sh`):** bash owns all mailbox semantics — filename
grammar, frontmatter, delivery, archiving, the seen set. `coord-send.sh`
writes, `coord-inbox.sh` reads (formatted for context injection),
`coord-done.sh` archives. Everything is pinned by `coord-selftest.sh`
(82 checks, throwaway mailbox via `CLAUDE_COORD_DIR`).
- **Hook (`hooks/scripts/session-start.mjs`):** thin zero-dependency Node
wrapper (marketplace convention: hooks are `.mjs`) that calls
`coord-inbox.sh` and emits the `hookSpecificOutput.additionalContext`
envelope. No mailbox logic lives here. Always exits 0.
- **Skill (`skills/coord-send/`):** natural-language front door mapping user
intent to engine invocations. No mailbox logic lives here either.
**Boundary rule:** the mailbox is transport, not state. Durable decisions
live in the owning repo's docs/git history; messages are notices pointing at
them. Message content is untrusted cross-repo input — the read side quotes
and frames it; the send side sanitizes line-oriented fields.
## Conventions
- Scripts are bash-3.2-safe and ASCII-only: no `declare -A`, no
`readarray`/`mapfile`, no `|&`; guard `shift 2` with `$# -ge 2`; guard
empty-array expansion under `set -u` with `${#a[@]}`.
- Zero dependencies everywhere: bash + coreutils in the engine, `node:`
builtins only in hook and tests.
- TDD: no behavior change without a failing selftest check first.
`bash scripts/coord-selftest.sh` must exit 0 (82/82).
- English for all code, docs, and commit messages (public repo). Norwegian
trigger aliases in the skill description are deliberate.
- Conventional Commits: `type(scope): description`.
## Commands
- Test: `bash scripts/coord-selftest.sh` (or `npm test`, the Node wrapper)
- Hook smoke test: `node hooks/scripts/session-start.mjs` (expects JSON on stdout)
## Release
Version must agree across: `.claude-plugin/plugin.json`, `package.json`,
README version badge, `skills/coord-send/SKILL.md` frontmatter, git tag
`vX.Y.Z`, and the catalog `ref` in
`ktg-plugin-marketplace/catalog/.claude-plugin/marketplace.json`. Release via
the catalog's `scripts/release-plugin.mjs repo-mailbox` (tag + ref bump
together);
verify with `scripts/check-versions.mjs`. Never hand-edit a ref.
Two things that script does that its dry-run label does not suggest:
`--create-tag` creates AND pushes the tag even without `--write`, and its
closing verification gate runs `check-versions.mjs` over ALL plugins — one
unrelated plugin in ERROR aborts it with the catalog edit written but
uncommitted. When that happens, commit the catalog's `marketplace.json` +
`README.md` by hand and leave every other dirty file in that repo alone.
## Hardening roadmap
Empty — the post-v0.1.0 queue (atomic delivery, `.`/`..` rejection,
selftest gaps, uniform `-h`) shipped in v0.2.0; broadcast self-delivery
shipped in v0.2.1; broadcast retraction (`coord-send --retract`) shipped in
v0.4.0, closing the last monotonically-growing surface. `coord-inbox.sh`
still ignores unknown arguments by design (hook context must never fail)
but now warns about each one on stderr, which the hook discards.
Two retraction limits are deliberate, not gaps: it is un-send and never
recall (a repo that already received a broadcast keeps it — the seen set is
delivery history and is left untouched), and the sender check is an accident
guard, not a security boundary, because `--from` redefines identity here as
it does everywhere else in the engine.