Create a New Workflow

Author a workflow — the fifth content type — as a self-contained workflows/<name>.mjs script run by Claude Code's Workflow tool. A workflow fixes its phases, fan-out, and verification structure in JavaScript: its control flow is deterministic and rereadable, while the outputs of its agent() calls are LLM subagents and remain nondeterministic. This skill is the procedure for authoring one; guides/creating-workflows.md is the API reference it draws on.

Vendor-API caveat. The Workflow run model is generally available on paid Claude Code plans (~v2.1.154+), but the script-authoring surface (the injected agent() / parallel() / pipeline() / phase() / log() / workflow() primitives and the args / budget globals) is an evolving vendor API — accurate as observed in Claude Code v2.1.x, subject to change, never CI-enforced.

When to Use

• You have a repeatable, parameterized procedure that coordinates several agents and want it captured as a reusable artifact whose shape you already know.
• You need a review, research, or migration procedure to run the same way every time, with the fan-out and verification logic auditable in code rather than re-decided by a lead each run.
• You are adding a reviewed seed to the workflows/ library, or authoring a personal workflow for .claude/workflows/.
• You are deciding between writing a team and a workflow — read Step 1 first.

Inputs