What problem does it solve? Keeping main 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 with intelligent merging, without archiving the change. ## Core Features & Use Cases - Intelligent Requirement Merging: Applies ADDED, MODIFIED, REMOVED, and RENAMED requirement sections from delta specs while preserving untouched content in main specs. - Store-Aware Operation: Discovers registered OpenSpec stores via openspec store list and targets the correct specs root for every read and write. - Safe Capability Retirement: Deletes a main spec only when strict conditions hold (empty requirements, valid Purpose, retire_capabilities: true marker), and validates results with openspec validate --specs. - Use Case: After finishing a change proposal that adds two requirements and modifies one in the billing/invoices capability, run the sync to update the main spec files while keeping the change active for continued work. ## Quick Start Ask the assistant to sync the delta specs from a named OpenSpec change into the main specs, for example by saying "sync the specs from the add-invoice-export change".
