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_plugin_shipped_set.py

@@ -124,10 +124,10 @@ def test_every_deriver_exists():
 
 def manifest(**fields) -> str:
     base = {
-        "name": "scribe",
+        "name": "grimoire",
         "description": "d",
         "version": "0.1.48",
-        "mcpServers": {"scribe": {"type": "http", "url": "${user_config.api_endpoint}/mcp"}},
+        "mcpServers": {"grimoire": {"type": "http", "url": "${user_config.api_endpoint}/mcp"}},
         "userConfig": {"api_endpoint": {"type": "string"}},
     }
     base.update(fields)
@@ -149,7 +149,7 @@ def test_an_identical_manifest_is_not_a_change():
 
 @pytest.mark.parametrize("field,value", [
     ("userConfig", {"api_endpoint": {"type": "string", "title": "changed"}}),
-    ("mcpServers", {"scribe": {"type": "http", "url": "elsewhere"}}),
+    ("mcpServers", {"grimoire": {"type": "http", "url": "elsewhere"}}),
     ("description", "a different description"),
     ("name", "renamed"),
 ])
@@ -225,11 +225,11 @@ def test_shipped_content_changed_reports_a_hook_edit_as_changed(monkeypatch):
 
     monkeypatch.setattr(
         check_plugin, "_git",
-        lambda *a: (0, "plugin/hooks/scribe_session_context.sh"),
+        lambda *a: (0, "plugin/hooks/grimoire_session_context.sh"),
     )
     changed, paths = check_plugin.shipped_content_changed("origin/main")
     assert changed is True
-    assert paths == ["plugin/hooks/scribe_session_context.sh"]
+    assert paths == ["plugin/hooks/grimoire_session_context.sh"]
 
 
 def test_a_failed_diff_is_None_and_never_False(monkeypatch):