Swarm

Claude Code port: skills this file names (for example how, why, unslop, arena, or a ... principle skill) are sibling skills in this plugin. They are user-invoked, so the Skill tool can't load them. To use one, read ${CLAUDE_SKILL_DIR}/../<name>/SKILL.md (principle skills: ${CLAUDE_SKILL_DIR}/../principle-<name>/SKILL.md) and follow it. Subagents use the Agent tool; valid model values are fable, opus, sonnet, haiku.

Swarm

Fan out N parallel background workers. They may cover separate slices, race the same brief, or mix both. The parent waits, aggregates, and returns one report.

Start

Open a todo list (TodoWrite) with one entry per phase before launching anything.

1. Frame
2. Fan out
3. Aggregate
4. Report

Phase A: Frame

1. State the done predicate and the artifact or report the swarm must return.
2. Choose the shape. Partition into slices, race N workers on identical briefs, or mix both. For a race or mixed shape, declare first pass, rank all, or best-of before spawning.
3. Set N from the user or derive it from the shape. N is total workers, not a concurrency limit.
4. Use sonnet as the worker model. For a model race, name each arm's model up front.
5. Give each worker its own writable output when it writes.

Phase B: Fan out

Spawn all N workers in one message with the Agent tool: subagent_type: general-purpose, run_in_background: true, isolation: "worktree" for workers that write, and the chosen model.

When a worker must start from a non-default branch, tell it to check that branch out in its worktree first.

Every brief stands alone. Include the goal, scope, exact slice or race arm, how to verify, and what to report. Reports use PASS, ISSUES, or BLOCKED with evidence.

If a worker drops out, proceed with N-1 and note it.

Phase C: Aggregate

Read the terminal results. For coverage, every required slice needs a result. For a race, apply the selection rule declared up front. Use first pass, rank all, or best-of. Do not paste raw worker dumps.

Keep a compact result table, one-line evidenced issues, and explicit gaps or dropouts.

Phase D: Report

Return one consolidated in-chat report with the table, issue one-liners, gaps or dropouts, and the race rule when used.