rename(547): the plugin is grimoire — manifest, MCP key, hooks, env, skills

Step 3 of the Scribe -> Grimoire rename.

- Plugin `grimoire` in marketplace `grimoire-plugin`, MCP server key
  `grimoire`, so tools reach a session as mcp__plugin_grimoire_grimoire__*.
- hooks/scribe_* -> hooks/grimoire_*, their shell functions and the TMPDIR
  ledgers with them; SCRIBE_URL / SCRIBE_TOKEN / SCRIBE_HOOK_DIR /
  SCRIBE_LEDGER_DIRS -> GRIMOIRE_*; the project marker is `.grimoire`.
- skills/using-scribe -> using-grimoire, /grimoire:sync, stored processes
  arrive as grimoire-proc-<slug>; moment_actions names them the same way.
- Migration 0124 rewrites stored skill names (rule_moments,
  rule_moment_judgments, moment_mappings) from scribe:/scribe-proc- to
  grimoire:/grimoire-proc-, so a rule mounted on a skill keeps firing.
- Settings' install commands and MCP-only defaults, the docs and the
  tests follow.
- scripts/check_plugin.py drops the smoke event for a report-check hook
  that has no file in plugin/hooks.

Kept on purpose: the secret-sealing label, and the names that let backups
written as Scribe restore and be counted.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_session_context_ledger.py

@@ -26,7 +26,7 @@ statement, so a blanket delete (all False) and a no-op (all True) both fail,
 and neither can be made to pass by editing one case.
 
 Runs the real shell against a temp TMPDIR, like the after-write hook's tests.
-Deliberately with no SCRIBE_URL/SCRIBE_TOKEN in the environment: clearing the
+Deliberately with no GRIMOIRE_URL/GRIMOIRE_TOKEN in the environment: clearing the
 ledger is local, keyless and networkless, and must still happen on an instance
 that is unreachable or unconfigured.
 """
@@ -41,7 +41,7 @@ from pathlib import Path
 import pytest
 
 PLUGIN = Path(__file__).resolve().parents[1] / "plugin"
-HOOK = PLUGIN / "hooks" / "scribe_session_context.sh"
+HOOK = PLUGIN / "hooks" / "grimoire_session_context.sh"
 
 
 def _env(tmp_path):
@@ -54,13 +54,13 @@ def _env(tmp_path):
     for tool in ("bash",):
         if shutil.which(tool) is None:
             pytest.skip(f"hook runtime tool {tool!r} not installed")
-    # No SCRIBE_URL / SCRIBE_TOKEN on purpose — see the module docstring.
+    # No GRIMOIRE_URL / GRIMOIRE_TOKEN on purpose — see the module docstring.
     return {"PATH": os.environ["PATH"], "TMPDIR": str(tmp_path),
             "HOME": str(tmp_path)}
 
 
 def _ledger(tmp_path, sid: str, name: str = "rules.ids") -> Path:
-    d = tmp_path / "scribe-priorart"
+    d = tmp_path / "grimoire-priorart"
     d.mkdir(exist_ok=True)
     f = d / f"{sid}.{name}"
     f.write_text("156\n168\n")