plan

name	plan
description	Convert selected user stories or a refined GitHub Issue into an execution-ready tasks-*.md list and sync the GitHub Issue checklist. Use after stories/refinement, before implementation.

Activity: Plan Implementation

RFC 2119 Notice: The key words MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD, SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be interpreted as described in RFC 2119.

Goal

Convert selected User Stories or a refined GitHub Issue into a structured, execution-ready task list. The task list drives the implement activity and keeps the GitHub Issue checklist in sync.

This activity adapts to the input — it works with a user stories file (from the PRD workflow) or a refined issue (from the single-issue workflow).

Mode Detection

Input	Mode	Source
User stories file + story selection	Stories Mode	user-stories-[prd-name].md
Refined GitHub Issue	Issue Mode	issue-[number]-[name]-refinement.md or the GitHub Issue itself

Process

1. Receive Context: User provides the reference to the source document.
2. Review Available Work: You MUST read the source and list available stories or the issue scope.
3. Select Scope: In Stories Mode, you MUST ask which stories to include. In Issue Mode, the scope is the single issue.
4. Generate Task List: You MUST produce a tasks-*.md file in the required format.
5. Publish to GitHub: You MUST update the corresponding GitHub Issue(s) with the task checklist by delegating to github-ops whenever possible.
6. Save Output.

Package Manager and Command Standards

• For JavaScript/TypeScript repositories, you MUST prefer pnpm over npm for install and script execution.
• You MAY fall back to npm only when pnpm is unavailable or the project is explicitly npm-locked.
• Generated tasks for JS/TS projects MUST use canonical package.json script names when available:
  • lint, lint:fix
  • format, format:check
  • typecheck
  • test, test:unit, test:integration, test:e2e
  • audit
  • validate (aggregate gate script)

Clarifying Questions

• In Stories Mode: "Which stories would you like to include? (Recommended: 1-3 stories)"
• "Should I update the GitHub Issues with the task checklist now (delegating to github-ops)?"
• "Is this a greenfield/new project, or an existing codebase?"
• "Are there specific implementation details or dependencies I should consider?"
• "Do any selected stories involve data model creation? What sample/seed data should be included?"

Output Format

The task list MUST follow this structure:

# Implementation Plan - [Name]

## Relevant Files

- `path/to/file1.ts` - [Description]
- `path/to/file2.ts` - [Description]

## Tasks

- [ ] 1.0 Implement Story [ID]: [Story Title] (or: Implement Issue [#] - [Github_Issue_URL]: [Title])

  - [ ] 1.1 [First implementation step]
  - [ ] 1.2 [Second implementation step]
  - [ ] 1.x Verify Acceptance Criterion: [Criterion 1]
  - [ ] 1.y Verify Acceptance Criterion: [Criterion 2]
  - [ ] 1.z Run Tests: [Test Requirements]

- [ ] 2.0 Implement Story [ID]: [Story Title] (or: Implement Issue [#] - [Github_Issue_URL]: [Title])
  - [ ] 2.1 [First implementation step]
  - ...

Conversion Guidelines

When converting a User Story or Refined Issue to a Parent Task:

1. Title: You MUST use the format Implement Story [ID]: [Title] or Implement Issue [#]: [Title].
2. Sub-tasks:
   • You MUST convert every item in the Implementation Steps section into a sub-task.
   • You MUST add explicit sub-tasks for each Acceptance Criterion verification.

• You MUST add explicit sub-tasks for each Testing requirement (unit/integration/manual/edge cases).
• You MUST include explicit validation means for each major behavior:
  • Automated verification (test command or script).
  • Manual/UI verification path when user-visible behavior is affected.
• You MUST include an acceptance-criteria-to-tests mapping step so each AC is explicitly covered.
• For JS/TS repositories, testing and quality tasks MUST reference canonical script names (pnpm run <script> preferred).
• If schema or data-model changes are involved, migration tasks are required by default; omission is allowed only with an explicit documented opt-out rationale.
• Migration flows MUST include: create migration artifact, document rollback/impact, request user confirmation before apply, apply migration after confirmation, and verify applied state.
• If the story involves data models, you SHOULD include a sub-task to generate seed data.

3. Context: You MAY add a > Note: block under the parent task for quick reference (User Story text or Business Rules), but the checkbox structure MUST remain clean.
4. Relevant Files: You MUST aggregate all "Files to Create/Modify" from selected stories into the top-level Relevant Files section.

Greenfield Project — Task 0

If this is a greenfield project or a new component, you MUST include a Task 0: Project Setup as the first parent task:

- [ ] 0.0 Project Setup
  - [ ] 0.1 Initialize project structure and package management
  - [ ] 0.2 Set up version control and repository structure
  - [ ] 0.3 Configure environment variables (.env, .env.example)
  - [ ] 0.4 Set up development environment (dependencies, build tools, linting, formatting)
  - [ ] 0.5 Create initial documentation (README, CONTRIBUTING, setup instructions)
  - [ ] 0.6 Create seed data generation script (if using database)
  - [ ] 0.7 Verify local development environment works (test build, tests pass, seed data loads)
  - [ ] 0.8 Publish initial project to GitHub (if not already done)

When to include Task 0:

• ✅ First time setting up a new repository
• ✅ Starting a new microservice or component
• ✅ Setting up isolated development environment for greenfield features
• ✅ Database setup with initial schema
• ❌ Extensions to existing projects (skip if dependencies already installed)

Output

• Format: Markdown (.md)
• Location: /workstream/
• Filename:
  • Stories Mode: tasks-[prd-name]-plan.md
  • Issue Mode: tasks-issue-[issue-number]-[issue-name].md

Final Instructions

1. You MUST NOT start implementing.
2. You MUST read the source document (user stories or refined issue).
3. In Stories Mode, you MUST list available stories and ask the user for their selection.
4. You MUST convert the selection into the strict task list format.
5. You MUST ensure all Implementation Steps, Acceptance Criteria, and Testing requirements are preserved as sub-tasks.
6. For JS/TS repositories, you MUST prefer pnpm commands and canonical script names in generated tasks.
7. You MUST ensure each task includes both implementation and test/validation steps, including edge-case validation.
8. For schema/data-model changes, you MUST include migration lifecycle tasks and an explicit user-confirmation gate before applying migrations unless an opt-out rationale is documented.
9. You MUST update the corresponding GitHub Issue(s) with the task checklist by delegating to github-ops whenever possible. If no issue exists, you MUST ask the user whether to create one first.
10. You MUST save the task list file.
11. You MUST inform the user they can now use the implement activity to start coding.