diff --git a/.gitignore b/.gitignore
index 0916b3b80..2dfd04f4d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,7 @@ Thumbs.db
 .impeccable/live/manual-edit-events.jsonl
 .impeccable/live/manual-edit-evidence/
 .impeccable/live/pending-manual-edits.json
+.impeccable/hook.cache.json
 .impeccable/history/
 # Per-run critique snapshots are local artifacts. ignore.md (also under
 # this dir) carries deferrals the user may want to share, so it's
diff --git a/tests/live-server.test.mjs b/tests/live-server.test.mjs
index 3593c0b20..5caade393 100644
--- a/tests/live-server.test.mjs
+++ b/tests/live-server.test.mjs
@@ -93,14 +93,16 @@ async function stashManualEdit(server, entry) {
   return res.json();
 }
 
-it('gitignores local manual Apply runtime artifacts', () => {
+it('gitignores local Impeccable runtime artifacts', () => {
   const ignored = execFileSync('git', [
     'check-ignore',
     '.impeccable/live/manual-edit-apply-transaction.json',
     '.impeccable/live/manual-edit-evidence/example.json',
+    '.impeccable/hook.cache.json',
   ], { cwd: REPO_ROOT, encoding: 'utf-8' });
   assert.match(ignored, /\.impeccable\/live\/manual-edit-apply-transaction\.json/);
   assert.match(ignored, /\.impeccable\/live\/manual-edit-evidence\/example\.json/);
+  assert.match(ignored, /\.impeccable\/hook\.cache\.json/);
 });
 
 async function readSseUntil(reader, decoder, needle, maxReads = 12) {