Implement Specification

Implement the specification at: $ARGUMENTS

Check if STM is available by running stm list. If the command fails, STM is not installed.

Pre-Execution Checks

1. Check Task Management:

   • If STM shows "Available but not initialized" -> Run stm init first, then /spec:decompose to create tasks
   • If STM shows "Available and initialized" -> Use STM for tasks
   • If STM shows "Not installed" -> Use TodoWrite instead

2. Verify Specification:

   • Confirm spec file exists and is complete
   • Check that required tools are available
   • Stop if anything is missing or unclear

Implementation Process

1. Analyze Specification

Read the specification to understand:

• What components need to be built
• Dependencies between components
• Testing requirements
• Success criteria

2. Load or Create Tasks

Using STM (if available):

stm list --status pending -f json

Using TodoWrite (fallback):

Create tasks for each component in the specification

3. Implementation Workflow

For each task, follow this cycle:

Step 1: Implement

Implement the component directly, applying domain-specific best practices:

1. Run stm show [task-id] to get full task details
2. Implement based on requirements, following project code style
3. Add appropriate error handling
4. Reference CLAUDE.md for project conventions

Step 2: Write Tests

Write comprehensive tests for the implemented component:

1. Cover edge cases and aim for >80% coverage
2. Follow project testing patterns
3. Run tests to verify they pass

Step 3: Code Review with Fix Loop (Max 3 Iterations)

Important: Always run code review to verify both quality AND completeness. Task cannot be marked done without passing both. The review-fix loop runs a maximum of 3 times before escalating to the user.

iteration = 0
review_passed = false

while iteration < 3 and not review_passed:

  # Run code review
  Review implementation for BOTH:
  1. COMPLETENESS - Are all requirements from the task fully implemented?
  2. QUALITY - Code quality, security, error handling, test coverage

  Categorize issues as: CRITICAL, IMPORTANT, or MINOR.

  # Parse review output
  Extract issues by severity:
  - CRITICAL: Security vulnerabilities, crashes, data loss
  - IMPORTANT: Performance issues, missing error handling
  - MINOR: Style, docs (log but don't block)

  if no CRITICAL and no IMPORTANT issues:
    review_passed = true
    break

  # Fix issues
  For each CRITICAL issue:
    Fix immediately - these block completion

  For each IMPORTANT issue:
    Fix before marking task done

  # Re-run tests after fixes
  Run test suite to verify fixes don't break anything

  iteration++

# Handle max iterations reached
if iteration >= 3 and not review_passed:
  ESCALATE - Do NOT mark task done
  Report to user:
  - Which issues remain unresolved
  - What was attempted
  - Request manual intervention

Step 4: Update STM Status

Auto-update protocol - Always update STM status after review loop:

On success (review passed):

stm update [task-id] --status done --notes "Implemented, tested, reviewed - passed"

On escalation (max iterations reached):

stm update [task-id] --status blocked --notes "Review loop failed after 3 iterations - [remaining issues]"

Then notify the user of the escalation with details about remaining issues.

Step 5: Commit Changes

Create atomic commit following project conventions:

git add [files]
git commit -m "[follow project's commit convention]"

4. Track Progress

Monitor implementation progress:

Using STM:

stm list --pretty              # View all tasks
stm list --status pending      # Pending tasks
stm list --status in-progress  # Active tasks
stm list --status done         # Completed tasks

Using TodoWrite:

Track tasks in the session with status indicators.

5. Complete Implementation

Implementation is complete when:

• All tasks are COMPLETE (all requirements implemented)
• All tasks pass quality review (no critical issues)
• All tests passing
• Documentation updated

If Issues Arise

If problems are encountered:

1. Identify the specific issue
2. Apply relevant domain knowledge to resolve
3. Or request user assistance if blocked