Jira Implement Task

Implement Jira Task

You are a software engineer. This skill takes a Jira ticket key, reads its description, and implements the work end-to-end: branch creation, code changes, commits, push, and PR.

Argument Parsing

Parse $ARGUMENTS to extract:

• Ticket key: The Jira ticket key (e.g., NIMBUS-123). Required.
• --gw: Use the gw CLI to create a worktree for the feature branch.
• --worktree: Use Claude Code's EnterWorktree tool to create an isolated worktree. Falls back to git worktree add if EnterWorktree is unavailable.

--gw and --worktree are mutually exclusive. If neither is provided, use the default behavior (create a branch in the current working tree).

IMPORTANT — Restore Context

This skill uses /agent-restore-context to survive /clear and /compact.

• Step 0: /agent-restore-context check to verify the hook is set up.
• Step 3a: /agent-restore-context write jira-implement-task after creating the implementation plan.
• Before each /clear: /agent-restore-context write jira-implement-task with the updated current task number and all other necessary information.
• Step 3e: /agent-restore-context delete jira-implement-task when done.

Step 0: Verify Restore Context

Invoke /agent-restore-context check. This verifies the hook is configured and will invoke /agent-restore-context-setup if needed.

Project Configuration

Before starting, read the project's CLAUDE.md and/or AGENTS.md to determine the following project-specific settings. These files are the source of truth for how to work in this repo.

If a setting is not found in CLAUDE.md, AGENTS.md, rules/, or /docs, ask the user whether they want to add it to CLAUDE.md, AGENTS.md, rules/ or /docs — or use the fallback default for this run only.

Step 1: Fetch Ticket Details

Use the Atlassian MCP tools to retrieve the ticket:

1. Call mcp__atlassian__getAccessibleAtlassianResources to get the cloud ID
2. Call mcp__atlassian__getJiraIssue with the cloud ID and ticket key
3. Extract: Summary, Description (requirements, acceptance criteria, files), and Issue type

If the ticket cannot be found, report the error and stop. Always write Markdown to Jira, never ADF — the MCP tools handle conversion.

Step 2: Create a Feature Branch

Determine the branch name using the project's branch naming convention and the base branch from project configuration.

Default mode (no flag)

Create a branch from the base branch in the current working tree:

git checkout <base-branch>
git pull
git checkout -b <branch-name>

If the branch already exists, ask the user whether to check out the existing branch or create a new one with a -v2 suffix.

--gw mode

Use the gw CLI to create a worktree with the feature branch:

gw task <branch-name>

This creates a new worktree and switches into it. All subsequent work in this skill happens inside the worktree directory returned by gw. Include the worktree path in the restore context so future /clear cycles can cd back into it.

--worktree mode

Use Claude Code's EnterWorktree tool to create an isolated worktree:

1. Call EnterWorktree with name set to the branch name.
2. If EnterWorktree is unavailable or fails, fall back to manual git worktree creation:

   git worktree add .claude/worktrees/<branch-name> -b <branch-name> <base-branch>
   cd .claude/worktrees/<branch-name>
   

3. All subsequent work in this skill happens inside the worktree directory. Include the worktree path in the restore context so future /clear cycles can cd back into it.

Step 3: Implement Changes

3a: Understand Scope and Plan

1. Understand scope: Read the ticket description carefully. Identify all files to modify/create.
2. Read existing files: Always read files before modifying them.
3. Create implementation plan: Break the changes into the smallest reasonable chunks of work. Save the plan to <skills-dir>/jira-implement-task/plans/<TICKET-KEY>-plan.md (where <skills-dir> is .agents/skills/ or .claude/skills/ per the detected layout). Each task should be independently testable and committable. Commit the plan so it can be shared for handoff. Delete it before merging or keep it as a record.
4. Create restore context: Invoke /agent-restore-context write jira-implement-task with content that includes the ticket key, branch name, plan file path, current task number (1), and the instruction to invoke /jira-implement-task <TICKET-KEY> and read the plan file before doing any work.

3b: Red/Green Testing Loop (per task)

For each task in the implementation plan, follow this cycle:

1. Invoke /agent-restore-context write jira-implement-task with the current task number.
2. Run /clear.
3. Write tests first (red phase): Write or update tests that capture the expected behavior for this task. Tests should fail at this point.
4. Get user approval on tests: Present the tests to the user and get explicit approval before proceeding. Do NOT implement changes until tests are approved.
5. Commit the tests: Once approved, commit the failing tests with a message like test(<scope>): add tests for <task description>.
6. Implement changes (green phase): Write the minimum code to make the tests pass.
7. Run tests: Verify all tests pass using the project's test command (files).

3c: Three Strikes Policy

If the implementation fails to make tests pass after 3 attempts:

1. Revert the branch to the last testing commit (the committed failing tests).
2. Invoke /agent-restore-context write jira-implement-task.
3. Run /clear.
4. Try again from the green phase with a fresh approach.

If the second full attempt also fails after 3 strikes, stop and ask the user for guidance.

3d: Commit and Advance

Once tests pass:

1. Commit the implementation changes.
2. Invoke /agent-restore-context write jira-implement-task with the next task number.
3. Run /clear.
4. Move on to the next task in the implementation plan.

3e: Completion

Once all tasks in the plan are implemented and passing:

1. Run full test suite: Run the project's test command (full) to verify everything passes.
2. Invoke /agent-restore-context delete jira-implement-task.
3. Ask the user whether to delete the implementation plan file or keep it.
4. Proceed to Step 4 (push and PR creation).

Guidelines

• Follow the project's conventions from CLAUDE.md / AGENTS.md
• If the ticket is ambiguous, ask the user for clarification before proceeding
• If the project defines a component workflow, use it for new component tickets
• If the project defines available agents, use them when task complexity warrants it

Step 4: Push and Create PR

Permission check

Run gh repo view --json viewerPermission --jq '.viewerPermission'. If the result is READ, skip push and PR — print the exact git push and gh pr create commands for the user to run manually, then stop.

Push and create PR

git push -u origin <branch-name>
gh pr create --title "<type>(<scope>): <summary>" --body "$(cat <<'EOF'
## Summary
<1-5 bullet points describing the changes>

Closes <TICKET-KEY>

## Test plan
- [ ] <verification steps>

🤖 Generated with [Claude Code](https://claude.com/claude-code)
EOF
)"

Return the PR URL to the user when done.

Implement Jira task: $ARGUMENTS