# Grimoire plugin for Claude Code

Turns a self-hosted [Grimoire](https://git.fabledsword.com/bvandeusen/FabledScribe)
instance into a first-class Claude Code extension:

- **MCP tools** over your notes, tasks, projects, milestones, systems, and
  rulebook (the `grimoire` server).
- **Session-start push channel** — a `SessionStart` hook injects the
  active project's live state (from the server) and this adapter's short
  Claude Code guidance, so Grimoire surfaces *without being asked*. Rules are
  never preloaded; they arrive by retrieval when your work matches one.
- **Prior-art recall on writes** — a `PreToolUse` hook on Write/Edit checks the
  file about to be written against your recorded snippets (what's kept at that
  path, and what resembles the code) and offers them before the helper is
  rewritten. Titles only, never blocks the edit.
- **The shared Grimoire skills** — client-neutral Agent Skills, the same files
  any client's package would ship: using-grimoire, writing-plans, reporting-back
  (reply to the operator in a shape that says where the work stands),
  systematic-debugging, verification, brainstorming, reusing-code (record and
  recall reusable code as snippets), shape-accounting and family-canon.
  Replaces superpowers.
- **Your Grimoire Processes as skills** — saved Processes are synced into local
  `~/.claude/skills/grimoire-proc-*` stubs that auto-surface by relevance; the
  stub fetches the live procedure via `get_process`. Refreshed each session and
  on demand with `/grimoire:sync`.

It is designed so you can uninstall `superpowers` and depend on Grimoire instead
of auto-memory — leave auto-memory at its default; Grimoire replaces its job by
holding the one copy, not by switching it off.

**How the pieces divide the work**: the Grimoire server orients
every MCP client and serves live state; the skills in `skills/` state every
reflex in full and name no client; this plugin is the Claude Code adapter —
hooks that deliver at the right moment, `/grimoire:sync`, and the few things only
Claude Code needs said (`hooks/grimoire_static_context.md`). Packaging Grimoire for
another client: see [PACKAGING.md](PACKAGING.md).

## Install

The plugin ships inside the Grimoire app repo, so the marketplace *is* that repo —
you always get the plugin version that matches your Grimoire instance.

```
/plugin marketplace add https://git.fabledsword.com/bvandeusen/FabledScribe.git
/plugin install grimoire@grimoire-plugin
```

On install you'll be asked for:

| Setting | What |
|---|---|
| **Grimoire base URL** | e.g. `https://grimoire.example.com` (no trailing slash) |
| **Grimoire API key** | a write-scoped `fmcp_` key from **Settings → MCP Access** (stored in your OS keychain) |
| **Active project id** | optional — numeric project id to scope the session-start context |

## What gets wired

- `plugin.json` `mcpServers` → the `grimoire` MCP server at `<base URL>/mcp` (Bearer auth).
- `hooks/hooks.json` → SessionStart hook (`hooks/grimoire_session_context.sh`),
  **fail-open**: if Grimoire is unreachable it injects nothing and never blocks
  the session.
- `hooks/hooks.json` → PreToolUse hook on `Write|Edit`
  (`hooks/grimoire_prior_art.sh`) → `GET /api/plugin/prior-art`. Returns
  `additionalContext` with **no** permission decision, so it can inform the write
  but never stop it; silent when nothing is recorded, which is most of the time.
  Two framings: a REUSE menu (similar/nearby records), and a SYNC nudge when a
  snippet records the exact file being edited — "updating the record is part of
  the edit" — each with its own once-per-session dedup. A third, ledger-fed
  line names a duplicate family (no canon) or a canon recorded elsewhere for
  the names being written (its own dedup channel, `exclude_derive`).
  Fail-open but not fail-silent: a configured instance that does not answer
  in time is said, once per outage ("Grimoire did not answer … this write went
  UNCHECKED"), so a session can tell "checked, nothing there" from "never
  checked"; an answer clears the marker. The local by-name arm needs no
  server and always runs. Toggle in **Settings → General → Knowledge
  auto-inject**.
- `hooks/hooks.json` → UserPromptSubmit hook (`hooks/grimoire_autoinject.sh`) →
  `GET /api/plugin/retrieve`: the rules, preferences and records that match the
  message, as a short menu of titles and matched passages.
- `hooks/hooks.json` → PreToolUse hook on `Bash` (`hooks/grimoire_tool_rules.sh`)
  → `GET /api/plugin/tool-rules`: the rules that match the command about to run.
- `hooks/hooks.json` → PreToolUse hook on every tool (`hooks/grimoire_moment.sh`)
  → `POST /api/plugin/moment`: the rules mounted on the moments the call
  reaches. It skips tools that `GET /api/plugin/moment-tools` says reach
  nothing mounted, and Grimoire's own tools, whose responses carry
  `moment_rules`.
- `hooks/hooks.json` → PostToolUse hooks on Grimoire's `get_rule`,
  `rule_outcome`, `update_task` and `add_task_log`: they keep the session's
  ledgers of rules opened and acted on (`get_rule` also reports to
  `POST /api/plugin/rule-opened`), and claim the task being worked
  (`GET /api/plugin/claim-session`) so it comes back after a compaction.
- `hooks/hooks.json` → PostToolUse hook on `Bash`
  (`hooks/grimoire_after_write.sh`): code written through sed/heredocs/scripts
  never reaches the PreToolUse hook, so this one diffs the working tree after
  every Bash call (per-session path+blob snapshot; one `git status` when
  nothing changed) and runs the same arms on the definitions just written,
  through the same endpoint and the same dedup channels. `additionalContext`
  only; never blocks, and shares the pre-write hook's once-per-outage "did not
  answer" line (8 s budget here — it runs after the tool, so it gates
  nothing). The extractor, the prose/data skip list, the local by-name
  duplicate arm and the outage line are shared in `hooks/grimoire_defs.sh`.
- `hooks/hooks.json` → Stop hook (`hooks/grimoire_reply_check.sh`): sends the
  reply that ends the turn to `POST /api/plugin/reply-rules`, which holds it
  once for an unopened rule mounted on the reply moments or matching the reply.
  When the turn closed a Grimoire task (`update_task`/`create_task` with status
  done), the same request has the server check the reply for the completion
  sections — where the work sits, what needs you, what comes next. If they are
  missing it blocks once with the reason the server returns, and records how
  the rewrite came out; it never blocks twice, and never blocks when the
  instance did not record the check (unconfigured or unreachable). Outcomes
  land in the admin logs under category `plugin`, action `report_check`.
- `hooks/hooks.json` → a second Stop hook (`hooks/grimoire_shape_check.sh`): the
  write hooks note every definition a write names (and every new file) in a
  session ledger; at the end of the turn this sends them to
  `GET /api/plugin/shape-check`, which answers with the ones nobody has judged.
  If any are, it blocks once with the server's reason, asking the agent that
  wrote them to say what each is — reusable (record a snippet), an instance or
  variant of one, or a one-off — in one `classify_shapes` call. Same discipline
  as the report check: never twice, never without a recorded check. Outcomes
  land under category `plugin`, action `shape_check`.
- `skills/` → the universal process-skills, surfaced by description match.
- `hooks/grimoire_sync_processes.sh` (a 2nd SessionStart hook) + the `/grimoire:sync`
  command → generate `~/.claude/skills/grimoire-proc-*` stubs from your Grimoire
  Processes (via `GET /api/plugin/processes`); also **fail-open**, and pruned to
  match what exists in Grimoire.
- `hooks/hooks.json` → PreCompact hook (`hooks/grimoire_precompact_preserve.sh`):
  tells the summarizer which parts of the conversation to keep literally. Local
  only, and it never blocks, because a blocked compaction is skipped outright.
- `hooks/hooks.json` → SessionEnd hook (`hooks/grimoire_session_end.sh`) →
  `GET /api/plugin/release-session`: releases the session's task claims.

## Notes

- **Do not hand-edit `version` in `.claude-plugin/plugin.json`.** It is minted
  from the clock — run `python3 scripts/mint_plugin_version.py` (or `make
  mint-plugin`, where `make` is installed) after changing anything under
  `plugin/`, and commit the result. The installer decides whether to refresh
  the cache it executes from by comparing that string, so content that ships
  without a new version reaches the repo and stops there. CI fails the lane if
  you forget.
- The plugin uses one key for its MCP tools and its hooks, so give it **write**
  scope: the MCP tools create and update records, and the moment, rule-opened
  and reply hooks POST. A read-scoped key runs the GET hooks only; the others
  fail open and add nothing.