Issue Setup Skill

Purpose

Transform a GitHub issue into a fully-prepared development environment with:

• Complete issue context and acceptance criteria
• Structured implementation plan (scratchpad)
• Feature branch ready for work
• Situational codebase awareness

Context Prerequisites

Before beginning, load critical project context:

Project Structure

Read the project's CLAUDE.md to understand:

• Module architecture
• Development philosophy
• Current sprint priorities
• Branch naming conventions

Codebase Orientation

Get a high-level view of the repository structure to identify affected areas.

Workflow Execution

Phase 0: Check Existing Context (Self-Correction)

Before proceeding with setup, check if work already initialized:

1. Detect existing scratchpad:

   # Look for SCRATCHPAD_{issue_number}.md
   ls SCRATCHPAD_*.md 2>/dev/null
   

2. If scratchpad exists:

   ✓ Scratchpad already exists for this issue.
   
   Delegating to work-session skill...
   

   Then invoke:

   Skill: work-session
   args: "{issue_number}"
   

   STOP here - don't proceed with setup.

3. If no scratchpad:

   • Proceed to Phase 1 (normal setup flow)

Phase 1: Gather Context (Parallel)

Input: Issue reference in format owner/repo#number or just #number (uses current repo)

Examples:

• owner/repository#42
• #42 (assumes current repository)

Execute these operations in parallel for faster setup:

1. Repository Context:

   • Determine owner/repo from input or git remote
   • Read project's CLAUDE.md for conventions
   • Check current git status and branch

2. Issue Details:

   • Retrieve complete issue using GitHub tools:
     • Title, body (description), labels
     • State (open/closed), assignees
     • Milestone, project associations
     • All comments (especially implementation details)
     • Linked issues (mentions, closes, related)

3. Generate branch name (after issue fetched):

   • Format: {issue-number}-{slugified-title}
   • Example: 42-implement-fact-batching
   • Sanitize title: lowercase, spaces→hyphens, remove special chars

4. Build issue context map:

   • Is this part of a milestone/project?
   • Are there dependent issues (blocks/blocked-by)?
   • What's the priority based on labels?
   • Are there linked PRs already?

Phase 2: Analyze & Plan

Goal: Understand the issue deeply before writing any code.

Analysis Steps:

1. Requirements Review:

   • Parse issue body for requirements/acceptance criteria
   • Check for task lists (- [ ] items) in issue body
   • Identify ambiguities or missing information
   • Note any conflicting requirements in comments

2. Codebase Investigation (Delegate to Scratchpad-Planner Agent):

   For thorough codebase analysis, use the scratchpad-planner agent:

   Skill: scratchpad-planner
   args: "issue #{number}: {issue title}
   
          Summary: {brief issue summary}
   
          Key requirements:
          {extract key requirements from issue body}
   
          Affected areas (if known):
          {mention specific modules/components if issue indicates}
   
          Repository: {owner/repo}
          Project context: See CLAUDE.md for module structure and conventions"
   

   The scratchpad-planner agent will:

   • Read project's CLAUDE.md for conventions and structure
   • Search for relevant existing code patterns using Grep and LSP
   • Identify affected modules/components and integration points
   • Find similar implementations to learn from
   • Generate atomic task breakdown following project conventions
   • Ask clarifying questions for ambiguous requirements
   • Support resumable analysis for complex codebases

   The agent replaces generic exploration with specialized planning expertise, providing more structured analysis and implementation approach generation.

3. Technical Breakdown:

   • Break work into atomic, committable tasks
   • Identify integration points
   • Flag potential challenges
   • Estimate complexity/scope

4. Dependency Check:

   • Does this require other issues first? (check "depends on" mentions)
   • Will this block other work? (check "blocks" mentions)
   • Are there API contract implications?
   • Check milestone dependencies

Phase 3: Create Scratchpad

Generate: SCRATCHPAD_{issue_number}.md

Template Structure:

# {Issue Title} - #{issue_number}

## Issue Details
- **Repository:** {owner/repo}
- **GitHub URL:** {issue_url}
- **State:** {open/closed}
- **Labels:** {labels}
- **Milestone:** {milestone if exists}
- **Assignees:** {assignees}
- **Related Issues:** {linked issues if any}
  - Depends on: #{issue_numbers}
  - Blocks: #{issue_numbers}
  - Related: #{issue_numbers}

## Description
{full issue body from GitHub}

## Acceptance Criteria
{extract task list from issue body, or create from description}
- [ ] {criterion 1}
- [ ] {criterion 2}
- [ ] {criterion 3}

## Branch Strategy
- **Base branch:** main (or develop-ts/develop if exists)
- **Feature branch:** {issue_number}-{slugified-title}
- **Current branch:** {git branch --show-current}

## Implementation Checklist

### Setup
- [ ] Fetch latest from base branch
- [ ] Create and checkout feature branch

### Implementation Tasks
{Break down into atomic commits - each should be independently reviewable}

- [ ] {First atomic task with clear scope}
  - Files affected: {list}
  - Why: {brief rationale}
  
- [ ] {Second atomic task}
  - Files affected: {list}
  - Why: {brief rationale}

{Continue with granular breakdown...}

### Quality Checks
- [ ] Run linter/type checker
- [ ] Execute relevant tests
- [ ] Self-review for code quality
- [ ] Verify acceptance criteria met

### Documentation
- [ ] Update relevant README/docs (if applicable)
- [ ] Add inline comments for complex logic (if applicable)

## Technical Notes

### Architecture Considerations
{Any architectural decisions to consider}
{Module boundaries to respect}
{Integration points to handle}

### Implementation Approach
{High-level strategy for solving the problem}
{Why this approach vs alternatives}

### Potential Challenges
{Known complexity areas}
{Technical debt to navigate}
{Performance considerations}

## Questions/Blockers

### Clarifications Needed
{List any unclear requirements}
{Ambiguities in issue description}

### Blocked By
{List any dependencies not yet complete - reference issue numbers}

### Assumptions Made
{Document assumptions if requirements unclear}

### Decisions Made
{Populated during Phase 3.5 Interactive Q&A}
{Format: Q: question → A: decision (rationale)}

## Work Log

{This section fills in during execution via /start-work}
{Each work session adds dated entries}

---
**Generated:** {timestamp}
**By:** Issue Setup Skill
**Source:** {github_issue_url}

Scratchpad Quality Guidelines:

• Atomic tasks: Each checklist item should be one commit
• Clear scope: Reader should understand what each task does
• Testable: Acceptance criteria should be verifiable
• Realistic: Don't over-engineer or under-scope
• Contextual: Reference project-specific conventions

Phase 3.5: Interactive Q&A (Resolve Clarifications)

Goal: Resolve any questions or ambiguities before starting implementation.

Trigger: If the scratchpad has items in the "Clarifications Needed" section.

Process:

1. Check for Outstanding Questions:

   • Review the Questions/Blockers section of the scratchpad
   • If "Clarifications Needed" is empty, skip to Phase 4
   • If questions exist, proceed with interactive resolution

2. Present Questions via AskUserQuestion: For each clarification needed, use the AskUserQuestion tool to get user input:

   AskUserQuestion:
     question: "{The specific clarification question}"
     header: "Clarify"
     options:
       - label: "{Option A}"
         description: "{What this choice means}"
       - label: "{Option B}"
         description: "{What this choice means}"
       - label: "{Option C}" (if applicable)
         description: "{What this choice means}"
     multiSelect: false (or true if multiple answers valid)
   

   Guidelines for presenting questions:

   • Frame questions clearly with context
   • Provide 2-4 concrete options when possible
   • Include descriptions explaining implications of each choice
   • User can always select "Other" for custom input
   • Group related questions if they have dependencies

3. Update Scratchpad with Decisions: After collecting all answers, update the scratchpad:

   a) Add "Decisions Made" section (if not present) under Questions/Blockers:

   ### Decisions Made
   {Timestamp}
   
   **Q: {Original question}**
   **A:** {User's answer/decision}
   **Rationale:** {Brief explanation of why, if provided}
   

   b) Remove resolved items from "Clarifications Needed"

   c) Update relevant sections if decisions affect:

   • Implementation tasks (add/remove/modify based on decisions)
   • Technical approach
   • Assumptions (convert to confirmed decisions)

4. Confirm Resolution: Display summary of decisions made:

   ✓ Resolved {N} clarifications:
   
   1. {Question summary} → {Decision}
   2. {Question summary} → {Decision}
   ...
   
   📋 SCRATCHPAD updated with decisions.
   

Example Interaction:

📋 SCRATCHPAD_42.md has 3 clarifications that need resolution before proceeding.

[AskUserQuestion 1/3]
Question: "Should we keep commands as aliases during the transition to skills?"
Header: "Migration"
Options:
  - "Keep as thin wrappers" - Commands remain but delegate to skills
  - "Remove immediately" - Clean break, skills only
  - "Decide per-command" - Evaluate each command individually

[User selects: "Keep as thin wrappers"]

[AskUserQuestion 2/3]
Question: "How should prime-session be handled?"
Header: "Behavior"
Options:
  - "Convert to auto-invoke skill" - Activates when entering new repo
  - "Keep as explicit command" - User must invoke manually
  - "Remove entirely" - Claude reads CLAUDE.md automatically anyway

[User selects: "Keep as explicit command"]

...

✓ Resolved 3 clarifications:

1. Migration strategy → Keep commands as thin wrappers
2. prime-session behavior → Keep as explicit command
3. ...

📋 SCRATCHPAD_42.md updated with decisions.
Proceeding to branch creation...

Skip Conditions:

• No items in "Clarifications Needed" → Skip directly to Phase 4
• User explicitly requests to skip → Note unresolved questions, proceed with assumptions

Phase 4: Prepare Workspace

Branch Creation:

1. Detect base branch:

   # Check what branches exist
   git fetch origin
   
   # Prefer in this order:
   # 1. develop-ts (if exists)
   # 2. develop (if exists)
   # 3. main (default)
   git branch -r | grep -E 'origin/(develop-ts|develop|main)'
   

2. Create feature branch:

   # Generate branch name from issue
   # Format: {issue_number}-{slugified-title}
   # Example: 42-implement-fact-batching
   
   git branch {issue-number}-{slugified-title} origin/{base-branch}
   # Don't checkout yet - let operator decide when to switch
   

3. Confirm creation:

   git branch --list {branch-name}
   

Final Output:

Display concise summary:

✓ Issue #{issue_number} analyzed and prepared

📋 SCRATCHPAD_{issue_number}.md created with:
   - {X} implementation tasks
   - {Y} quality checks
   - {Z} decisions made (via Q&A)

🌿 Branch '{issue-number}-{slugified-title}' created from {base-branch}

🔗 GitHub Issue: {issue_url}

🚀 Ready to begin work:
   git checkout {branch-name}
   # Then start implementation

Note: If clarifications were resolved in Phase 3.5, the scratchpad now contains confirmed decisions rather than open questions. All ambiguities should be resolved before reaching this point.

Project-Specific Adaptations

For UI/Frontend Projects:

Component Context:

• Which components affected?
• State management implications?
• API contract dependencies?

For API/Backend Projects:

Contract Context:

• API endpoints added/modified?
• Breaking changes?
• Database migrations needed?

Error Handling

Issue Not Found

If GitHub issue doesn't exist:

• Verify issue number and repository
• Check if issue is in different repo
• Offer to search issues by title/keyword
• Confirm you have access to private repos (if applicable)

Insufficient Information

If issue lacks description or clear scope:

• Note this prominently in Questions/Blockers
• Suggest adding task list to issue before starting work
• Don't guess - make assumptions explicit
• Consider commenting on issue to request clarification

Branch Already Exists

If feature branch already exists:

• Check if work in progress (git log)
• Offer to resume vs. create new branch
• Warn about potential conflicts
• Suggest reviewing existing commits

Repository Access Issues

If can't access repository:

• Verify GitHub authentication (gh auth status)
• Check repository exists (might be private)
• Confirm repository name spelling
• Ensure gh CLI is installed and configured

Integration with Other Skills

Flows to:

• /start-work {issue_number} - Begin execution from scratchpad
• /commit - Make atomic commits as checklist progresses

Receives context from:

• Project CLAUDE.md - Architecture and conventions
• /prime-session - Current development priorities

Best Practices

✅ DO:

• Read acceptance criteria carefully
• Break work into truly atomic commits
• Flag ambiguities early
• Research codebase before planning
• Make scratchpad detailed but scannable
• Document assumptions explicitly

❌ DON'T:

• Start coding before scratchpad approved
• Guess at unclear requirements
• Create tasks too large to review
• Skip codebase investigation
• Over-engineer the plan
• Hide complexity in vague task descriptions

Operator Interaction Points

Before Scratchpad Creation: If issue is complex or ambiguous, ask:

• "This issue affects multiple modules. Should we break it into sub-issues?"
• "Acceptance criteria unclear on X. Should we clarify before planning?"

After Scratchpad Created: Present for review:

• "I've created SCRATCHPAD_42.md. Please review the implementation plan."
• "I flagged 2 questions in the Blockers section - need clarification?"

Before Branch Creation: Confirm readiness:

• "Base branch develop-ts is 5 commits behind origin. Pull first?"
• "Ready to create feature branch?"

Success Criteria

A successful issue setup produces:

✓ Complete context: All issue details captured ✓ Clear plan: Implementation steps are atomic and logical ✓ Identified risks: Challenges flagged upfront ✓ Ready workspace: Branch created, scratchpad prepared ✓ Operator confidence: Developer knows exactly what to build

The scratchpad should be so clear that another developer could pick it up and execute it.

Complex Implementation Detection

If the issue analysis reveals a complex implementation, suggest entering plan mode:

Triggers for EnterPlanMode:

• Implementation affects more than 3-4 files
• Multiple valid architectural approaches exist
• Significant refactoring required
• New patterns or abstractions needed
• Breaking changes to existing APIs

Suggestion:

This issue appears complex ({reason}). Would you like me to enter
plan mode to design the implementation approach before we proceed?

---

Version: 1.1.0 Last Updated: 2025-12-31 Maintained By: Muleteer Changelog:

• v1.1.0: Added Task delegation to Explore agent, parallel execution, LSP integration, EnterPlanMode triggers