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) to main specs through intelligent merging, so partial updates like adding a single scenario do not require rewriting entire requirement blocks. ## Core Features & Use Cases - Intelligent Delta Merging: Reads delta specs and applies only the stated changes to main specs, preserving existing content not mentioned in the delta. - Change Selection & Validation: Resolves the target change from context or prompts the user, and uses openspec status --json output as the authoritative source of delta spec paths. - Store-Aware Operation: Supports registered OpenSpec stores via --store <id> flags so specs in standalone repos can be synced. - Use Case: After drafting a change proposal with delta specs for a billing capability, run the sync to update the main billing spec with the new requirements while keeping the change active for continued implementation. ## Quick Start Ask the assistant to sync the delta specs from a named change into the main specs, for example by saying "sync the specs from the add-billing change".
