What problem does it solve? Long-running AI-assisted tasks lose context when sessions are compacted or cleared, causing repeated work, forgotten goals, and lost research. This Skill persists plans, findings, and progress as Markdown files in your project directory so work survives context resets and session interruptions. ## Core Features & Use Cases - Three-File Planning System: Creates task_plan.md (phases and decisions), findings.md (research and discoveries), and progress.md (session logs and test results) in your project root. - Session Recovery: A session-catchup script detects unsynced context from previous Claude Code or Codex sessions and suggests how to restore state after /clear or compaction. - Lifecycle Hooks: UserPromptSubmit, PreToolUse, PostToolUse, Stop, and PreCompact hooks re-inject plan state, remind you to update progress, and verify plan integrity via SHA-256 attestation to block prompt injection through tampered plan files. - Use Case: When asked to plan and execute a multi-phase research or build project requiring many tool calls, the Skill initializes the three files, tracks phase status (pending → in_progress → complete), logs errors, and resumes cleanly after interruptions. ## Quick Start Ask the AI to create a task plan for your multi-step project using the planning-with-files system and initialize the planning files in the current project directory.