add repo lifecycle hooks for mosaic-stack sessions

.mosaic/repo-hooks.sh

@@ -1,17 +1,29 @@
 #!/usr/bin/env bash
-# Optional repo-specific hooks used by scripts/agent/*.sh
+# Repo-specific hooks used by scripts/agent/*.sh for Mosaic Stack.
 
-# Called by session-start.sh
-# mosaic_hook_session_start() {
-#   echo "Run repo-specific startup checks"
-# }
+mosaic_hook_session_start() {
+  echo "[mosaic-stack] Branch: $(git rev-parse --abbrev-ref HEAD)"
+  echo "[mosaic-stack] Remotes:"
+  git remote -v | sed 's/^/[mosaic-stack]   /'
+  if command -v node >/dev/null 2>&1; then
+    echo "[mosaic-stack] Node: $(node -v)"
+  fi
+  if command -v pnpm >/dev/null 2>&1; then
+    echo "[mosaic-stack] pnpm: $(pnpm -v)"
+  fi
+}
 
-# Called by critical.sh
-# mosaic_hook_critical() {
-#   echo "Run repo-specific critical queries"
-# }
+mosaic_hook_critical() {
+  echo "[mosaic-stack] Recent commits:"
+  git log --oneline --decorate -n 5 | sed 's/^/[mosaic-stack]   /'
+  echo "[mosaic-stack] Open TODO/FIXME markers (top 20):"
+  rg -n "(TODO|FIXME|HACK|SECURITY)" apps packages plugins docs --glob '!**/node_modules/**' -S \
+    | head -n 20 \
+    | sed 's/^/[mosaic-stack]   /' \
+    || true
+}
 
-# Called by session-end.sh
-# mosaic_hook_session_end() {
-#   echo "Run repo-specific end-of-session checks"
-# }
+mosaic_hook_session_end() {
+  echo "[mosaic-stack] Working tree summary:"
+  git status --short | sed 's/^/[mosaic-stack]   /' || true
+}