chore: add project planning-with-files hooks

.codex/hooks/post-tool-use.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# planning-with-files: Post-tool-use hook for Codex
+
+HOOK_DIR="$(cd "$(dirname "$0")" 2>/dev/null && pwd)"
+PLAN_DIR="$(sh "${HOOK_DIR}/resolve-plan-dir.sh" 2>/dev/null)"
+PLAN_FILE="${PLAN_DIR:+${PLAN_DIR}/}task_plan.md"
+
+if [ -f "$PLAN_FILE" ]; then
+    echo "[planning-with-files] Update progress.md with what you just did. If a phase is now complete, update task_plan.md status."
+fi
+exit 0