planning-with-files: Persistent File-Based Planning for AI Coding Agents

planning-with-files provides persistent, file-based planning with crash-protected Markdown plan files that can be restored even after context loss or /clear. It includes a deterministic completion gate and supports multi-agent state sharing via disk. The tool follows the Manus style and works with over 60 agents like Claude Code, Codex CLI, Cursor, Kiro, and OpenCode via SKILL.md integration. For developers using Claude API or Codex CLI, this tool ensures long-running coding agent tasks retain their planning state even when hitting context limits or after manual clearing, dramatically improving task reliability. Teams running local open-source models can also easily integrate via SKILL.md for multi-agent collaboration.