Execute the implementation planning workflow using the plan template to generate design artifacts.

User Input You MUST consider the user input before proceeding (if not empty). Pre Execution Checks Check for extension hooks (before planning) : Check if .specify/extensions.yml exists in the project root. If it exists, read it and look for entries under the hooks.before plan key If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally Filter out hooks where enabled is explicitly false . Treat hooks without an enabled field as enabled by default. For each remaining hook, do not attempt to interpret or evaluate hook condition expressions: If the hook has no condition field, or it is null/empty, treat the hook as executable If the hook defines a non empty condition , skip the hook and leave condition evaluation to the HookExecutor implementation When constructing command invocations from hook command names, replace dots ( . ) with hyphens ( ). For example, speckit.git.commit → /speckit git commit . For each executable hook, output the following based on its optional flag: Optional hook ( optional: true ): Mandatory hook ( optional: false ): After emitting the block above you MUST actually invoke the hook and wait for it to finish before continuing. Run it the same way you would run the command yourself in this agent/session (the invocation may differ from the literal {command} id shown above, e.g. a skills mode agent runs it as /skill:speckit ... or $speckit ... ). Emitting the block alone does not run the hook. If no hooks are registered or .specify/extensions.yml does not exist, skip silently Outline 1. Setup : Run .specify/scripts/bash/setup plan.sh json from 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"). 2. Load context : Read FEATURE SPEC and .specify/memory/constitution.md . Load IMPL PLAN template (already copied). 3. 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 Re evaluate Constitution Check post design Mandatory Post Execution Hooks You MUST complete this section before reporting completion to the user. Check if .specify/extensions.yml exists in the project root. If it does not exist, or no hooks are registered under hooks.after plan , skip to the Completion Report. If it exists, read it and look for entries under the hooks.after plan key. If the YAML cannot be parsed or is invalid, skip hook checking silently and continue to the Completion Report. Filter out hooks where enabled is explicitly false . Treat hooks without an enabled field as enabled by default. For each remaining hook, do not attempt to interpret or evaluate hook condition expressions: If the hook has no condition field, or it is null/empty, treat the hook as executable If the hook defines a non empty condition , skip the hook and leave condition evaluation to the HookExecutor implementation When constructing command invocations from hook command names, replace dots ( . ) with hyphens ( ). For example, speckit.git.commit → /speckit git commit . For each executable hook, output the following based on its optional flag: Mandatory hook ( optional: false ) — You MUST emit EXECUTE COMMAND: for each mandatory hook : After emitting the block above you MUST actually invoke the hook and wait for it to finish before continuing. Run it the same way you would run the command yourself in this agent/session (the invocation may differ from the literal {command} id shown above, e.g. a skills mode agent runs it as /skill:speckit ... or $speckit ... ). Emitting the block alone does not run the hook. Optional hook ( optional: true ): Completion Report Command ends after Phase 1 design. Report branch, IMPL PLAN path, and generated artifacts. Phases Phase 0: Outline & Research 1. Extract unknowns from Technical Context above: For each NEEDS CLARIFICATION → research task For each dependency → best practices task For each integration → patterns task 2. Generate and dispatch research agents : 3. Consolidate findings in research.md using 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 1. Extract entities from feature spec → data model.md : Entity name, fields, relationships Validation rules from requirements State transitions if applicable 2. 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.) 3. Create quickstart validation guide → quickstart.md : Document runnable validation scenarios that prove the feature works end to end Include prerequisites, setup commands, test/run commands, and expected outcomes Use links or references to contracts and data model details instead of duplicating them Do not include full implementation code, model/service/controller bodies, migrations, or complete test suites Keep this artifact as a validation/run guide; implementation details belong in tasks.md and the implementation phase Output : data model.md, /contracts/ , quickstart.md Key rules Use absolute paths for filesystem operations; use project relative paths for references in documentation ERROR on gate failures or unresolved clarifications Done When [ ] Plan workflow executed and design artifacts generated [ ] Extension hooks dispatched or skipped according to the rules in Mandatory Post Execution Hooks above [ ] Completion reported to user with branch, plan path, and generated artifacts

speckit-plan