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>

scripts/check_plugin.py

@@ -282,7 +282,7 @@ def check_shellcheck() -> None:
 # network, so "silent" would be the wrong assertion for it.
 #
 # UNREACHABLE is different for the two write-path hooks: a call
-# that was owed and did not come back is SAID, once per outage ("> Scribe did
+# that was owed and did not come back is SAID, once per outage ("> Grimoire did
 # not answer …"), so a session can tell "checked, nothing there" from "never
 # checked". That line — or silence, when the once-per-outage marker in
 # ${TMPDIR:-/tmp}/scribe-priorart/ was set by a run in the last ten minutes —
@@ -424,7 +424,7 @@ STATIC_EMITTERS = {
 }
 # The hooks that say so when a configured instance does not answer.
 OUTAGE_SPEAKERS = {"scribe_prior_art.sh", "scribe_after_write.sh"}
-OUTAGE_LINE = "> Scribe did not answer the prior-art check"
+OUTAGE_LINE = "> Grimoire did not answer the prior-art check"
 
 
 def _run_hook(script: Path, event: str, env_extra: dict[str, str]) -> subprocess.CompletedProcess:
@@ -492,7 +492,7 @@ def check_fail_open() -> None:
 def check_local_prior_art_needs_no_instance() -> None:
     """The prior-art hook's local arm must answer with no credentials.
 
-    The other arms ask Scribe what was RECORDED. This one asks the repo what
+    The other arms ask Grimoire what was RECORDED. This one asks the repo what
     EXISTS, which needs no instance — and that is the whole reason it catches
     the case the recorded arms structurally cannot: a helper nobody thought to
     record. If it ever silently starts depending on configuration, it stops