Speckit Plan

Speckit Plan Skill

User Input

$ARGUMENTS

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
• For each executable hook, output the following based on its optional flag:
• Optional hook (optional: true):

``` ## Extension Hooks

Optional Pre-Hook: {extension} Command: /{command} Description: {description}

Prompt: {prompt} To execute: /{command} ```

• Mandatory hook (optional: false):

``` ## Extension Hooks

Automatic Pre-Hook: {extension} Executing: /{command} EXECUTE_COMMAND: {command}

Wait for the result of the hook command before proceeding to the Outline. ```

• 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 FEATURESPEC, IMPLPLAN, 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").

1. Load context: Read FEATURESPEC and .specify/memory/constitution.md. Load IMPLPLAN template (already copied).

1. 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

1. Stop and report: Command ends after Phase 2 planning. Report branch, IMPL_PLAN path, and generated artifacts.

1. Check for extension hooks: After reporting, check if .specify/extensions.yml exists in the project root.

• 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 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
• For each executable hook, output the following based on its optional flag:
• Optional hook (optional: true):

``` ## Extension Hooks

Optional Hook: {extension} Command: /{command} Description: {description}

Prompt: {prompt} To execute: /{command} ```

• Mandatory hook (optional: false):

``` ## Extension Hooks

Automatic Hook: {extension} Executing: /{command} EXECUTE_COMMAND: {command} ```

• If no hooks are registered or .specify/extensions.yml does not exist, skip silently

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

1. Generate and dispatch research agents:

``text For each unknown in Technical Context: Task: "Research {unknown} for {feature context}" For each technology choice: Task: "Find best practices for {tech} in {domain}" ``

1. 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

1. 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.)

1. Agent context update:

• Run .specify/scripts/bash/update-agent-context.sh copilot
• 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

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: pradeepmouli
• Source: pradeepmouli/skillit
• License: MIT
• Homepage: https://pradeepmouli.github.io/skillit/

Install and usage instructions live in the source repository linked above.