# Teamwork > Coordinate a small role-based team for a multi-milestone task. Use when the user says "run this as a team," "spin up a crew," "use teamwork," or "/agent-collab:teamwork." Also offer this when explorer, worker, reviewer, and integration responsibilities separate cleanly. - Skill: `sumitake/teamwork` (Agent Skill) - Install (CLI): `npx skillmds@latest add sumitake/teamwork` - Raw SKILL.md: https://api.skillmd.com/api/skills/sumitake/teamwork/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: sumitake (https://skillmd.com/u/sumitake) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/sumitake/teamwork --- ## Unified runtime invocation Resolve the **plugin root** from this loaded file: `SKILL.md` is at `/skills//SKILL.md`. Invoke only `python3 "/coordinator.py"` and send one bounded JSON routing request on EOF-delimited stdin, without a PTY. Use the Python invocation example in the **Routing request** section in `/README.md` and the co-packaged manifest's signed `wire_contract`; never invent fields or provider actions. Supply one caller-defined work unit per independently useful deliverable, with this skill's logical action and a bounded opaque payload. Use `depends_on` only for actual dependencies. Honor an operator-named provider with `explicit_target`. For an authorized independent review or governance task without an operator-named provider, also use that field to bind the caller-verified distinct reviewer selected by the caller or designated by the workflow. Carry the same target into planning and live dispatch; verify returned native lineage before accepting independence. Otherwise use normal untargeted routing. Choose quality and effort for the workload; include context/output token estimates when known. Read the current manifest digest and actual cwd device/inode; do not copy example values. The runtime owns its timeout; do not wrap it in a shorter fixed timeout. Repository identity, source-head verification, disposable copies, patch capture, and cleanup remain caller-owned where applicable. The shim runs standalone from the installed plugin and transports the routing client's bounded result without semantic interpretation. Never discover a provider executable, reconstruct a raw command, or replay, retry, or fail over a consumed work unit. Provider status, terminal records, receipts, telemetry, and other structured fields are optional diagnostics; none is a content-availability gate. Preserve every returned content record or recovered partial response and interpret it with ordinary model reasoning. Never synthesize approval, authority, or a receipt from process exit or missing diagnostics. A planning-only request sets `dispatch_requested=false`; a live request sets it true and consumes at most one provider attempt per work unit. Planning reports route eligibility, not live availability or authentication. Report a caller/client failure at that layer; provider state remains unknown unless native evidence establishes it. Content availability and each work unit's `execution_status` are separate facts. # Teamwork Use the host's permitted subagent or coordination mechanisms. The primary owns objective interpretation, architecture, integration, secrets, and merge/deploy decisions. - Explorer: read-only research or architecture. - Worker: bounded `codegen.repository` or `frontend_codegen.repository`, returning a private patch. - Reviewer: `review.repository`, `frontend_review.repository`, or `governance.repository` with the exact required authority. The role or action alone does not prove independence: establish primary, author, and observed reviewer lineages, source identity, and required authority before accepting independent evidence. Otherwise retain advisory findings and keep any independent approval requirement unmet. - Integrator: the primary, which verifies and combines accepted outputs. State decomposition economics, ownership, budgets, source roots, authority, acceptance evidence, and stop conditions. Do not mix artifact types in one candidate set. Treat every output as untrusted, keep mutating work isolated, and return an attributed ledger. ## Delivery estimate checkpoint When producing a formal implementation design or plan, after scope, completion boundary, phases, dependencies, and gates are concrete and before final presentation, invoke `project-estimation` once for the artifact scope. Attach its compact `Delivery estimate` as `design_provisional` or `implementation_plan`; attach typed `estimate_unavailable` if no defensible range exists. A typed cost such as `unavailable_no_token_prior` must remain visible; it must not become zero or a workflow failure. On an unsupported host, use explicit invocation and state that the automatic checkpoint is unavailable rather than claiming it ran. ## Slicing worker milestones (conditional guidance) Applies ONLY when milestones decompose **product-feature implementation**; it does not apply to research, operations, configuration, or decision-only milestones — do not force those into slices. - **Prefer tracer-bullet vertical slices**: each worker milestone cuts a narrow but complete path through every affected layer, is demoable or independently verifiable on its own, and is sized to one bounded worker invocation/session with explicit acceptance criteria. Prefactoring milestones come first. - **Wide refactors are the exception.** An atomically codemoddable mechanical change runs as checkpointed batches with full verification per batch. Reserve expand–contract sequencing (expand beside the old form; migrate call sites in batch milestones; contract when no caller remains) for cases where old and new forms must genuinely coexist to keep callers and CI working during a staged migration — never merely because the blast radius is large. ## Attribution and license The tracer-bullet slice rules and expand–contract sequencing above are adapted from `skills/engineering/to-tickets/SKILL.md` in [mattpocock/skills](https://github.com/mattpocock/skills) at commit `2ab958093e83e0ec752e6c1c5932da465bf23e0c` (blob `96deac51d4391a3f691478d48f85f43261516c08`); the remainder of this skill is package-original. The adapted portions are and remain MIT-licensed: Copyright (c) 2026 Matt Pocock. 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