Update the README, AGENTS.md, install.sh, and docs/ for the converge
model: one `castle apply [name] [--plan]` replaces `deploy && start` and
the per-kind enable/disable/install/start/stop verbs. CLI references now
list apply + restart (the imperative bounce) + logs; recipes use
`castle apply`; "turn it off" is documented as `enabled: false` + apply.
install.sh's next-steps collapse to a single `castle apply`.
Verified: no retired-verb command instructions remain in any markdown;
install.sh syntax OK; live `castle apply --plan` reports converged;
doctor all-green; core 129 / cli 31 / api 59 pass.
The README/docs explained how the system works but not how to get it up
and running, and there was no way to tell a healthy node from a
half-configured one. Two additions close that gap.
castle doctor — a read-only preflight/postflight check. It inspects
setup *and* runtime (CLI on PATH, uv, lingering; repo:, control plane
registered, dashboard built; gateway/api running + listening, specs
generated; and — under tls=acme — DNS-plugin Caddy, provider token,
:443 bind; tunnel config for public services) and, for anything not
green, prints the exact next command. Exit 0 when nothing failed
(warnings allowed), 1 otherwise, so it doubles as a scriptable smoke
test after install/deploy. Agents can lean on it the same way they use
`castle tool list`.
Docs — the quick start now leads with prerequisites and one command
(install.sh installs the CLI + registers the control plane, so the old
manual `uv tool install` step is gone), adds a `castle doctor` verify
step, and gains an "exposure ladder" table framing the three rungs
(localhost → LAN HTTPS → public) that link the deep DNS/TLS/tunnel docs.
install.sh's closing summary and the AGENTS.md CLI reference mention
doctor too.
