What problem does it solve? Keeping main capability specifications in sync with change proposals is tedious and error-prone when done by hand. This Skill applies delta specs (ADDED, MODIFIED, REMOVED, RENAMED requirements) from an OpenSpec change directly into the main specs, without archiving the change. ## Core Features & Use Cases - Intelligent Merging: Applies delta requirements into main specs while preserving existing scenarios and content the delta does not mention. - Change Selection & Validation: Resolves the target change via openspec status and openspec list, then validates updated specs with openspec validate --specs. - Capability Retirement: Safely deletes a retired capability's spec.md only when strict conditions hold, including the retire_capabilities: true marker. - Use Case: After finishing a change that adds a billing requirement, ask the agent to sync the delta specs so the main specs reflect the new requirement while the change stays active for implementation. ## Quick Start Ask the agent to sync the delta specs from your current OpenSpec change into the main specs without archiving the change.