To Checklist

Index the work, then fan out. A checklist built from an index is complete; a checklist built from memory is a guess.

1. Read the body of work — the docs, plans, artifacts, or a directory to index. If the work is scattered, gather it into one place first.
2. Index it. Catalog every artifact: its type, its purpose, and what it requires to be done, verified, or published. Write the index to docs/plans/index.md. The index is the source of truth; the checklist is built from it, not from the artifacts directly.
3. Fan out. For each section of the index, spawn a subagent to build the checklist items for that section. Pass the subagent the index section and the relevant artifacts. The subagent returns checklist items — each with the action, the channel or location, and any dependencies. Parallelize the subagents; the index is what makes fan-out safe.
4. Aggregate. Collect the subagent outputs into a single checklist, ordered by the index. Deduplicate items that appear in more than one section.
5. Review. Check the checklist against the index: every indexed item must have a checklist entry. If an item is missing, spawn a subagent to close the gap.

A checklist is a record of what must be done, not a summary of what was made. If an item is missing from the checklist, it will not be done.

Record this output in docs/plans/ per the doc system, delegating the write to a subagent.