What problem does it solve? Turning an approved plugin specification and design into an executable development plan is error-prone: teams often split work by frontend/backend layers, lose traceability between requirements and tasks, and discover host-integration risks too late. This Skill converts a gated Plugin-Spec.md, plugin.yaml, and Plugin-Design.md into a PLUGIN-DEV-PLAN.md organized around runnable vertical slices. ## Core Features & Use Cases - Vertical-slice planning: Structures work into fixed phases (Scaffold, Local Round-trip, State, UI to Agent, Agent to UI, Feature Slices, Security, Packaging, Smoke) so each phase produces a runnable, observable capability. - Full traceability: Maps every must requirement and acceptance criterion to implementation tasks, verification tasks, targets, and evidence, with a Host Verification Matrix and Security Verification Matrix. - Task rigor and rollback: Every task carries a stable ID, files, dependencies, commands, completion criteria, evidence, failure rollback, and parallel-safety notes. - Use Case: After your interactive plugin design passes review, run this Skill to produce a phase-gated plan where the first critical path proves the minimal plugin round-trip before any complex business UI is built. ## Quick Start Ask the agent to generate the PLUGIN-DEV-PLAN.md from the approved Plugin-Spec.md, plugin.yaml, and Plugin-Design.md in the current plugin project.
