Speckit Plan Skill
Outline
- Setup: Run
scripts/setup-plan.sh --jsonfrom repo root and parse JSON for FEATURE_SPEC, IMPL_PLAN, SPECS_DIR, BRANCH. For single quotes in args like "I'm Groot", use escape syntax: e.g 'I'''m Groot' (or double-quote if possible: "I'm Groot"). - Load context: Read FEATURE_SPEC and
specs/constitution.md. Load IMPL_PLAN template (already copied). - Execute plan workflow: Follow the structure in IMPL_PLAN template to:
- Fill Technical Context (mark unknowns as "NEEDS CLARIFICATION") - Fill Constitution Check section from constitution - Evaluate gates (ERROR if violations unjustified) - Phase 0: Generate research.md (resolve all NEEDS CLARIFICATION) - Phase 1: Generate data-model.md, contracts/, quickstart.md - Phase 1: Update agent context by running the agent script - Re-evaluate Constitution Check post-design
- Stop and report: Command ends after Phase 2 planning. Report branch, IMPL_PLAN path, and generated artifacts.
Phases
Phase 0: Outline & Research
- Extract unknowns from Technical Context above:
- For each NEEDS CLARIFICATION → research task - For each dependency → best practices task - For each integration → patterns task
- Generate and dispatch research agents:
For each unknown in Technical Context: Task: "Research {unknown} for {feature context}" For each technology choice: Task: "Find best practices for {tech} in {domain}" - Consolidate findings in
research.mdusing format:
- Decision: [what was chosen] - Rationale: [why chosen] - Alternatives considered: [what else evaluated]
Output: research.md with all NEEDS CLARIFICATION resolved
Phase 1: Design & Contracts
Prerequisites: research.md complete
- Extract entities from feature spec →
data-model.md:
- Entity name, fields, relationships - Validation rules from requirements - State transitions if applicable
- Define interface contracts (if project has external interfaces) →
/contracts/:
- Identify what interfaces the project exposes to users or other systems - Document the contract format appropriate for the project type - Examples: public APIs for libraries, command schemas for CLI tools, endpoints for web services, grammars for parsers, UI contracts for applications - Skip if project is purely internal (build scripts, one-off tools, etc.)
- Agent context update:
- Run scripts/update-agent-context.sh codex - These scripts detect which AI agent is in use - Update the appropriate agent-specific context file - Add only new technology from current plan - Preserve manual additions between markers
Output: data-model.md, /contracts/*, quickstart.md, agent-specific file
Key rules
- Use absolute paths
- ERROR on gate failures or unresolved clarifications