Use when the user wants final completion sign-off on any work item — epic, story, bug, or spike: every task in docs/work/{work-id}/tasks.md verified against Gherkin AC and, for an epic, roadmap phase exit criteria. Triggers on "validate CHK01", "validate JIRA-123", "is this story done", "sign off th
Use when the user wants final completion sign-off on any work item — epic, story, bug, or spike: every task in docs/work/{work-id}/tasks.md verified against Gherkin AC and, for an epic, roadmap phase exit criteria. Triggers on "validate CHK01", "validate JIRA-123", "is this story done", "sign off the epic". Builds an acceptance matrix with evidence, updates task and work-item status, and produces