What problem does it solve? Turning a feature specification into a concrete implementation plan requires structured research, data modeling, and contract definition, which is error-prone when done ad hoc. This Skill automates the spec-kit planning workflow so design artifacts are produced consistently. ## Core Features & Use Cases - Plan Workflow Execution: Runs the setup script, loads the feature spec and constitution, and fills the implementation plan template with technical context. - Research and Design Phases: Generates research.md to resolve open questions, then produces data-model.md, contracts, and quickstart.md. - Extension Hooks: Checks .specify/extensions.yml for optional or mandatory before/after plan hooks and executes or surfaces them. - Use Case: After writing a feature spec in a spec-kit project, invoke this Skill to produce a complete plan directory with research findings, data models, and API contracts ready for implementation. ## Quick Start Run the speckit-plan skill to generate the implementation plan and design artifacts for the current feature branch.