What problem does it solve? Finalizing a completed change in an OpenSpec workflow involves checking artifact status, verifying task completion, syncing delta specs, and moving directories, which is error-prone when done manually. ## Core Features & Use Cases - Completion Verification: Checks artifact status via openspec status --json and counts incomplete tasks in tasks.md before archiving. - Delta Spec Sync Assessment: Compares delta specs against main specs and optionally triggers a sync subagent before archiving. - Safe Archiving: Moves the change directory to openspec/changes/archive/YYYY-MM-DD-<name> with collision detection. - Use Case: After finishing implementation of a feature change, ask the assistant to archive it; the skill prompts you to confirm any incomplete artifacts or tasks, syncs specs if needed, and archives the change with a dated folder name. ## Quick Start Archive the completed change named add-user-auth and sync its delta specs before moving it to the archive.