chore: add post-commit repo registry hook

Co-Authored-By: Svrnty Inc. <jp@svrnty.io>

lefthook.yml

@@ -44,6 +44,29 @@ commit-msg:
           printf '\n\nCo-Authored-By: Svrnty Inc. <jp@svrnty.io>\n' >> "{1}"
         fi
 
+post-commit:
+  commands:
+    register-repo:
+      run: |
+        REPO_NAME=$(basename "$(git rev-parse --show-toplevel)")
+        ROOT_CLAUDE="$(git rev-parse --show-toplevel)/../CLAUDE.md"
+        [ -f "$ROOT_CLAUDE" ] || exit 0
+        if grep -qF "| \`$REPO_NAME\`" "$ROOT_CLAUDE"; then
+          exit 0
+        fi
+        COMMIT=$(git rev-parse --short HEAD)
+        DATE=$(date +%Y-%m-%d)
+        TOTAL_LINE=$(grep -n '^\*\*Total:' "$ROOT_CLAUDE" | head -1 | cut -d: -f1)
+        if [ -z "$TOTAL_LINE" ]; then
+          exit 0
+        fi
+        OLD_COUNT=$(sed -n "${TOTAL_LINE}p" "$ROOT_CLAUDE" | grep -oP '\d+')
+        NEW_COUNT=$((OLD_COUNT + 1))
+        sed -i "${TOTAL_LINE}i| \`${REPO_NAME}\` | — | NEW REPO — registered ${DATE} (${COMMIT}). Update stack and purpose. |" "$ROOT_CLAUDE"
+        NEW_TOTAL_LINE=$((TOTAL_LINE + 1))
+        sed -i "${NEW_TOTAL_LINE}s/Total: ${OLD_COUNT}/Total: ${NEW_COUNT}/" "$ROOT_CLAUDE"
+        echo "REGISTRY: added '$REPO_NAME' to root CLAUDE.md (${DATE}, ${COMMIT})"
+
 pre-push:
   commands:
     protect-main: