MTS One

Perform one workstream task through parent-led sequential TDD. This is the default execution mode and does not require a native writing subagent.

Preconditions

1. Require an explicit user request and read the sidecar project, contract, active track, and selected task.
2. Confirm task status: READY, matching lane/workstream, and a matching current branch/worktree. The parent Agent manually creates or enters that worktree; this Skill never runs Git setup.
3. Change the task to IN_PROGRESS in the sidecar and record the parent host and identity in the track execution metadata.

TDD loop

For one focused behavior at a time:

1. Write and run the smallest focused test. Record the intended Red failure.
2. Implement the smallest Green change in the declared scope; run the test.
3. Refactor only after Green; rerun focused tests.
4. Obtain focused review. Native child Agents may assist only with research, review, or testing; they do not edit sidecar records or create commits.

Update the task Evidence, Review, and Result sections with commands, exit codes, platform, and material results. Record NOT RUN with a reason where appropriate. Move the task through IN_REVIEW to DONE, or BLOCKED with a specific owner and unblock condition. The parent Agent is the only maintainer of task records and commits.