rename(547): what people read says Grimoire

Step 1 of the Scribe -> Grimoire rename: every capitalised "Scribe" in prose
becomes "Grimoire" ("Fabled Scribe" -> "Fabled Grimoire") across the UI,
the PWA manifest and page title, the MCP instructions and tool docstrings,
hook and skill text, docs and README, with the tests that assert on that
prose moving with it. Old migrations keep their wording.

Identifiers are untouched here: the package, plugin name, MCP server key,
hook file names, env vars, the .scribe marker and FabledScribe repo/image
names move in steps 2 and 3, along with prose that quotes them.

The sweep matched "Scribe" only as a whole word, so describe/subscribe and
friends are untouched. The longer name took the MCP instructions one
character over their 1,600 budget; two phrases are shortened to fit.

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

tests/test_guidance_ownership.py

@@ -2,7 +2,7 @@
 
 WHY THIS EXISTS
 
-Scribe's guidance to agents reaches a session through five surfaces: the MCP
+Grimoire's guidance to agents reaches a session through five surfaces: the MCP
 `_INSTRUCTIONS`, the plugin's static session context, the live session context
 the server builds, the skills, and tool docstrings. A practice stated in full
 on several of them drifts apart, copy by copy.
@@ -320,11 +320,11 @@ TOPICS: tuple[Topic, ...] = (
           "belongs to another user", index=("shared:true",)),
     Topic("stored processes are followed as written", "docstrings", ("get_process",), "follow the returned body"),
     Topic("a project is never guessed", "docstrings", ("never guessing a project",), "never guessing a project"),
-    Topic("an unbound repo gets a bind hint", "live", ("bind_repo",), "isn't mapped to a scribe project"),
+    Topic("an unbound repo gets a bind hint", "live", ("bind_repo",), "isn't mapped to a grimoire project"),
     # ── the Claude Code adapter's own conventions ──
     Topic("compact at clean seams", "static", ("/compact",), "compact at clean seams"),
     Topic("stored processes sync into local skills", "commands", ("scribe-proc-",), "regenerate the local skill stubs"),
-    Topic("say so when scribe's tools are unavailable", "static", ("tools are unavailable",),
+    Topic("say so when grimoire's tools are unavailable", "static", ("tools are unavailable",),
           "rather than silently falling back to local notes"),
 )