What problem does it solve? When adding a new capability to a project, code and project knowledge often drift apart, leaving the knowledge base stale and unsearchable. This Skill closes that gap by completing missing implementation code and automatically merging verified facts into the Flow2Spec .Knowledge base in the same workflow. ## Core Features & Use Cases - Capability Gap Completion: Detects whether a requested capability is unimplemented, partially implemented, or already done, then fills only the missing code instead of rewriting modules. - Automated KB Merge Pipeline: Generates a kb-delta draft, previews it with flow2spec kb plan, applies it with kb apply, and validates with kb build and kb check without requiring the user to run commands manually. - Task Tracking Integration: When changeTracking.feat is enabled, creates or resumes tasks in .task/, checks off steps as they complete, and records user-facing to-dos. - Use Case: A user asks to add a failed-job retry queue. The Skill finds a half-finished implementation, completes the missing code, creates or updates the retry-queue topic, refreshes the index and routing manifest, and reports a summary of capability, implementation, and knowledge base changes. ## Quick Start Ask the agent to add a new capability with f2s-kb-feat, describing the capability, its scenarios, and boundaries so it can implement the code and sync the knowledge base.