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Benjamin Taylor 4d74bdc5c3 feat(runtime): auto-start managed Channels on long-running hosts (refs OSS-641)
Creating a Node listener or an Express handler now STARTS activation of the
runtime's declared managed Channels, so `channels.ready()` becomes
await-and-observe instead of the thing you must remember to call. A declared
Channel connects because it was declared.

The failure mode this removes: forget `ready()` and you get a process that
serves HTTP, looks healthy, and is silently disconnected with zero output.
Auto-start's worst case is an activation error in the logs.

The generic Fetch handler stays LAZY — it is the serverless/edge entry point,
where isolates freeze and recycle per request and separate cold starts would
mint competing listeners for the same Channel. `createCopilotHonoHandler` stays
lazy for the same reason: it is our Next.js App Router surface in practice
(every `examples/showcases/*` route handler builds one at module scope), and its
TSDoc now says so loudly. `activateChannels: false` remains the opt-out that
opens no socket.

Consequence for host code: the shutdown-handler boundary moves earlier. Signal
handlers must be registered before the listener is CREATED, not merely before
`ready()` — otherwise a Ctrl-C during the connect window hits Node's default
handler and leaks a live gateway session. The slack and teams examples and the
docs snippets are restructured accordingly.

Also migrates the seven channel-package README quickstarts off the generic
handler (a request handler a socket-mode bot constructs and never serves) onto
the Node listener, so they inherit auto-start and agree with the docs site.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-30 18:37:37 -05:00
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