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# YAML Format Specification
Complete reference for GitHub issue YAML files.
## Top-Level Structure
```yaml
repository: owner/repo # REQUIRED
project: 6 # OPTIONAL - GitHub project number
defaults: # OPTIONAL - Default values for all issues
labels: [label1, label2]
milestone: "Milestone Name"
issues: # REQUIRED - Array of issue definitions
- ref: issue1
title: "Issue Title"
body: "Issue body"
- ref: issue2
# ... more issues
```
## Required Fields
### `repository`
- Format: `owner/repo` (e.g., `myorg/myapp`)
- The GitHub repository where issues will be created
### `issues`
- Array of issue objects
- At least one issue required
### Per-Issue Fields
Each issue requires:
**`ref`** (string)
- Unique identifier for this issue within the YAML file
- Used for parent-child linking via `parent_ref`
- Not sent to GitHub (internal reference only)
- Recommended: lowercase with hyphens (e.g., `parent-issue`, `login-feature`)
**`title`** (string)
- Issue title displayed on GitHub
- Keep concise (< 80 characters recommended)
- Should be outcome-focused (WHAT, not HOW)
- Examples:
- ✅ "Enable search functionality"
- ❌ "Implement SearchService class"
**`body`** (string, multiline)
- Issue description in Markdown
- Use `|` for multiline content
- Supports GitHub Flavored Markdown
## Optional Fields
### Top-Level Optional
**`project`** (integer)
- GitHub project number (not project name)
- All created issues added to this project
**`defaults`** (object)
- Default values applied to all issues
- Can be overridden per-issue
- Supported: `labels`, `milestone`
### Per-Issue Optional
**`parent_ref`** (string)
- Reference to parent issue's `ref`
- Creates parent-child relationship
- Parent issue must be defined BEFORE child in YAML
**`milestone`** (string)
- Milestone name (exact match required)
- Overrides default milestone if specified
**`labels`** (array of strings)
- Labels to apply
- Overrides default labels if specified
- Labels don't need to exist (GitHub auto-creates)
## Issue Body Format
Standard format for issue bodies:
```markdown
## Overview
Brief description of what needs to be accomplished (the outcome).
## Acceptance Criteria
- [ ] Specific, testable criterion
- [ ] Another testable criterion
- [ ] Final criterion
## Technical Context
- Primary domain: [models/controllers involved]
- Similar pattern: [existing feature to reference]
- Integration points: [connections to other systems]
- Consider: [gotchas, constraints, or performance notes]
```
**Notes:**
- **Overview**: Outcome-focused (what users/system can do after)
- **Acceptance Criteria**: Specific, testable, observable
- **Technical Context**: Optional - add when issue involves integration, performance, security, or unfamiliar domains
## Complete Example
```yaml
repository: myorg/myapp
project: 6
defaults:
labels: [enhancement]
milestone: "v2.0"
issues:
# Parent issue
- ref: search-feature
title: "Enable search functionality"
milestone: "v2.1" # Override default
labels: [enhancement, search]
body: |
## Overview
Add full-text search to allow users to find posts and comments quickly.
## Acceptance Criteria
- [ ] Search bar visible in header on all pages
- [ ] Results page displays matching posts and comments
- [ ] Results are paginated (20 per page)
- [ ] Search works across post titles, bodies, and comments
## Technical Context
- Primary domain: Posts, Comments models; SearchController
- Similar pattern: Existing filter functionality in app/controllers/posts_controller.rb
- Consider: PostgreSQL full-text search vs external service (start simple)
# Child issue 1
- ref: search-indexing
parent_ref: search-feature
title: "Build search indexing"
body: |
## Overview
Create database indices to support full-text search.
## Acceptance Criteria
- [ ] Migration adds search columns to posts and comments
- [ ] Background job updates search indices on content changes
- [ ] Search query returns results in < 200ms for typical queries
## Technical Context
- Primary domain: Posts, Comments models; db/migrate
- Similar pattern: Existing index patterns in schema.rb
- Consider: Use PostgreSQL tsvector type, GIN index
# Child issue 2
- ref: search-ui
parent_ref: search-feature
title: "Build search UI"
body: |
## Overview
Create user interface for search functionality.
## Acceptance Criteria
- [ ] Search bar component in header
- [ ] Results page shows post/comment matches with highlighting
- [ ] Pagination controls (prev/next, page numbers)
- [ ] Empty state when no results found
## Technical Context
- Primary domain: SearchController, app/views/search
- Similar pattern: Pagination in app/views/posts/index.html.erb
- Integration points: Uses search indexing from #search-indexing
```
## Title Guidelines
Titles should describe the outcome, not implementation:
**Good (outcome-focused):**
- "Enable search functionality"
- "Users can filter posts by category"
- "Support OAuth authentication"
**Bad (implementation-focused):**
- "Implement SearchService class"
- "Add filter method to PostsController"
- "Install Devise gem"
## Technical Context Guidelines
Add Technical Context section when issue involves:
- **Integration**: Multiple systems/models working together
- **Performance**: Scale requirements (>100 records, <200ms response)
- **Security**: Auth, permissions, tenant isolation
- **Background processing**: Jobs, queues, async work
- **Unfamiliar domains**: New functionality in unknown territory
Skip Technical Context for:
- Standard CRUD (add field, basic form)
- UI-only changes (text, styling, layout)
- Copying existing pattern explicitly
**Format (3-5 bullets):**
- Primary domain: Where code lives
- Similar pattern: Existing feature to reference
- Integration points: Connections to other parts
- Consider: Gotchas, constraints, performance notes