planning-with-files (27k+ stars, MIT): persistent file-based planning for AI coding agents and long-running tasks — keeps task_plan.md / findings.md / progress.md on disk and lifecycle hooks re-inject the plan into context every turn, so the plan survives /clear, compaction and crashes; a Stop hook forms a deterministic completion gate that holds the agent until the plan reports complete. Project measurements: the on-disk plan cut a 13.3-turn re-orientation to 5.0 turns, 3-of-3 blind A/B wins, 96.7% assertion pass rate. Covers 60+ agents via the Agent Skills standard, with native plugins for Claude Code, Codex CLI, Pi, Hermes, OpenCode and DeepSeek Harness, plus localized skill variants (AR/DE/ES/zh-CN/zh-TW). Pattern follows Manus's "Markdown as working memory on disk"; parallel tasks get isolated .planning/ dirs; /plan-attest locks the plan with SHA-256.