chore(ai-workflow): prune stale refs in stop hooks

.codex/hooks/sync-git-branches.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+# stop hook: prune stale remote refs and remove integrated temporary local branches
+# This is informational - always exits 0
+
+# Consume stdin (required for hooks)
+cat > /dev/null
+
+# Change to project directory
+cd "$(dirname "$0")/../.." || exit 0
+
+if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+  exit 0
+fi
+
+default_branch="$(git symbolic-ref --quiet --short refs/remotes/origin/HEAD 2>/dev/null | sed 's#^origin/##')"
+if [ -z "$default_branch" ]; then
+  default_branch="master"
+fi
+
+current_branch="$(git branch --show-current 2>/dev/null || true)"
+
+branch_looks_temporary() {
+  case "$1" in
+    pr/*|feature/*|fix/*|docs/*|chore/*) return 0 ;;
+    *) return 1 ;;
+  esac
+}
+
+branch_is_integrated() {
+  local branch="$1"
+  local cherry_output
+
+  cherry_output="$(git cherry "$default_branch" "$branch" 2>/dev/null || true)"
+  if echo "$cherry_output" | grep -q '^+'; then
+    return 1
+  fi
+
+  return 0
+}
+
+echo "Syncing git refs and temporary branches..."
+echo ""
+
+echo "=== git config --local fetch.prune true ==="
+git config --local fetch.prune true 2>&1 || true
+echo ""
+
+echo "=== git config --local remote.origin.prune true ==="
+git config --local remote.origin.prune true 2>&1 || true
+echo ""
+
+echo "=== git fetch --prune origin ==="
+git fetch --prune origin 2>&1 || true
+echo ""
+
+while IFS='|' read -r branch upstream; do
+  [ -z "$branch" ] && continue
+  [ "$branch" = "$current_branch" ] && continue
+  [ "$branch" = "$default_branch" ] && continue
+
+  branch_looks_temporary "$branch" || continue
+  branch_is_integrated "$branch" || continue
+
+  if [ -n "$upstream" ] && git show-ref --verify --quiet "refs/remotes/$upstream"; then
+    continue
+  fi
+
+  echo "=== git branch -D $branch ==="
+  git branch -D "$branch" 2>&1 || true
+  echo ""
+done < <(git for-each-ref --format='%(refname:short)|%(upstream:short)' refs/heads)
+
+echo "Git ref sync complete."
+exit 0