Creates and maintains an agent-owned goal ledger that pairs with long-running coding work, compaction recovery, chained engineering goals, or codebase status tracking. Use when the user says "$goal", "/goal mode", "start a goal", "continue this goal", "chain goals", "agent progress ledger", "flight recorder", "implementation notes", or asks the agent to save progress separately from a PRD. When the runtime exposes a native goal tool (for example Codex `/goal`), couple the file ledger to the runtime goal objective. Keeps `GOAL.md` as the contract and `implementation-notes.html` as the canonical readable state for progress, decisions, validation, compaction resume, blockers, and next-goal links.
2026-05-19