implement-spec-subagent

Input Validation

CRITICAL: This skill requires three inputs to be passed from the parent agent:

1. {{TICKET}} - The ticket ID and title (e.g., "T-01: Implement user authentication")
2. {{SPEC_FILE}} - Path to the spec file (e.g., artefacts/spec.md)
3. {{PROGRESS_FILE}} - Path to the progress file (e.g., artefacts/progress.md)

If any of these inputs are missing or not provided, exit immediately with this message:

Error: Missing required input. Please provide: ticket ID, spec file path, and progress file path.

Do not proceed further. Do not attempt to infer or guess missing values.

Workflow

1. Gather context

   • Read progress file ({{PROGRESS_FILE}})
   • Read spec file(s) ({{SPEC_FILE}})

2. Do ticket

   • Ticket: {{TICKET}}
   • See guidelines below
   • Proceed to step 3 as soon as the ticket is done, don't proceed to other tickets

3. Verify work

   • Stage updates in Git (git add)
   • Load $review-changes skill. Ask it to review staged changes (git diff --cached).
   • Assess feedback. Address any P1 issues that makes sense to do.
   • If there was feedback, ask reviews again, then address again. Keep looping until there are no more changes to do.

4. Verify single ticket scope

   • Confirm you only modified files related to ONE ticket
   • If you touched multiple tickets, undo changes and redo with single ticket focus

5. Document learnings

   • Assess the conversation, summarise work done, include assumptions flagged
   • Identify potential roadblocks that future dev work might encounter (eg, errors, wrong decisions)
   • Append them to progress file - this is to assist future work

6. Commit changes

   • Include ticket ID in commit title

Code writing guidelines

• State assumptions before writing code.
• Verify before claiming correctness.
• Handle non-happy paths as well. Do not handle only the happy path.
• Answer: under what conditions does this work?

Other guidelines

• Do not make a pull request
• IMPORTANT: Only do ONE ticket. Stop after finishing one ticket. Do not proceed to others.
• IMPORTANT: Never commit artefacts/ files.