What problem does it solve? After development tasks are completed, keel documents (requirements, design, test cases, dev tasks) often fall out of sync with the actual codebase. This Skill keeps documentation aligned with implementation progress, detects drift between docs and code, and archives completed content to control document bloat. ## Core Features & Use Cases - Default Sync Pipeline: Runs trace → audit → check automatically, validating traceability matrix change sources, checking numbering integrity (AC coverage, F task closure, orphan IDs), and generating a deviation report with a health score. - Low-Risk Absorption: Automatically absorbs low-risk deviations (status field updates) while requiring user confirmation for high-risk changes like undocumented interfaces or tests. - Document Archiving: Archives completed requirements, designs, tests, and tasks into archive/ files with cascade support and an index, triggered by line-count or completion thresholds. - PRD Back-Propagation: Reverse-syncs keel requirement changes to the PRD mapping table via --back-propagate-prd. - Use Case: After finishing a sprint's development tasks, run the sync command to update task statuses, verify traceability coverage, get a health score, and archive completed features. ## Quick Start Ask the AI to run /sync after completing development tasks to update keel document statuses and generate a deviation report.