Manager Loop

Manager Loop

One coordinator, many workers, a heartbeat instead of a human trigger between steps. The coordinator never implements — it dispatches, watches, routes feedback, and gates merges. Each worker gets its own git worktree, branch, and PR, and is told explicitly to keep going until the deliverable is actually mergeable, not just "implemented."

This is the outer loop that runs many evaluator-optimizer convergence loops in parallel (each worker converging its own PR against a pass/fail bar), with advisor-checkpoint as the review step when a worker's approach needs a second opinion before or after the work lands.

When to use it

Fits a batch with several genuinely independent units — files, projects, or PRs that don't depend on each other's outcome. Doesn't fit a single task with one thread of work (there's nothing to coordinate), or units so interdependent that running them one at a time, in order, with full context carried forward is actually required.

For a single feature-level task with several sequential subtasks (one branch, one PR, tasks that build on each other) rather than a batch of independent units, use superpowers:subagent-driven-development instead — same session, fresh subagent per subtask, code review between each. Reach for this skill only once the work is actually a multi-unit batch; standing up worktrees, branches, and PRs per subtask for what is really one feature is the heavier tool for the wrong job.

The shape

1. Dispatch. For each unit of work, spin up a worker on its own worktree and branch — a background Agent call. Give it the deliverable, the acceptance bar (tests/build/lint that must pass), and an explicit directive: don't stop at "I implemented it" — keep going until the branch is actually mergeable (green build, green tests, PR open), and report back rather than declaring done if genuinely blocked. This is the fix for a worker that stops early at a plausible-looking first draft.
2. Heartbeat instead of waiting on the human. Don't sit idle between a worker's completion notification and your next action. Use ScheduleWakeup to re-enter at an interval matched to how fast the batch actually moves — checking in-flight PRs, build status, and whether a worker is stuck, the same way you'd poll CI. This is what turns "dispatch one thing, wait for a message, dispatch the next" into a loop that keeps moving on its own between check-ins. When you report batch status at a heartbeat, ground it in what you actually checked this cycle (PR state, CI status, the worker's own report) — don't assert a unit is done or still on track without a result from this session backing that claim.
3. Route feedback back to the worker, don't re-implement it yourself. When a PR needs a change (a review finding, a failed check), resume the same worker via SendMessage with the specific feedback, rather than fixing it in a fresh agent with no context or fixing it yourself in the coordinator's own thread. The worker already has the worktree and the history; re-dispatching loses both.
4. Gate the merge. Require the objective checks (build, tests, lint) to pass before a worker's PR is mergeable — same rule as evaluator-optimizer. Then still read the diff yourself before merging. A green build proves the code compiles and the tests it wrote pass; it doesn't prove the approach was right, that nothing was overreached, or that a subtler failure mode was missed. The loop moves work forward — it doesn't replace the review.

What this doesn't fix

Worker threads still stall on genuinely ambiguous problems, still misread instructions, and still produce plausible-but-wrong work that passes its own tests without actually being correct — the same failure modes any single agent has, just now happening in parallel across more surface area. Watch for a worker whose "done" claim doesn't survive your own read of the diff, and don't let batch throughput become a reason to skip that read.