docs/swarm/README.md gets the routes, the revision, the apply semantics
and the stopped-agent behaviour; the persistence doc points there from
the AGENTS.md entry. The swarm-controller, swarm-controller-api and
swarmctl READMEs and the repo map in AGENTS.md list the new bodies and
routes. docs/tools/swarmctl-cli.md is regenerated for
`swarmctl agent agents-md`, whose help text loses two passive phrasings
vale flags.
9add99838c