Align `dws event consume` with an AI-subprocess contract an orchestrator
can drive deterministically, and expose a machine-readable input schema
for event commands via `dws schema`.
Subprocess contract:
- Fixed stderr ready line `[event] ready event_key=<key> bus_pid=<pid>`;
block on it instead of sleeping.
- Final `[event] exited — received N event(s) in Xs (reason: ...)` line;
exit 0 on controlled exit, non-zero and no exited line on failure.
- stdin-EOF graceful shutdown, armed only for a pipe stdin on an
unbounded run; an interactive TTY and `< /dev/null` never trigger it.
- Ownership-based subscription cleanup: a run-created subscription is
unsubscribed on any clean exit while a --subscribe-id-reused one is
kept (--ephemeral still forces cleanup). Forward --profile to the
detached bus so non-default orgs resolve the right credentials, and
surface the child's real startup error over the ready pipe.
Schema:
- `dws schema "event consume"` (or event.consume) synthesizes a flat,
machine-readable schema from the command's cobra flags:
{description, path, source:"cobra",
parameters{<flag>:{type,required,description,default?}}} plus an
`arguments` array for positional inputs. Intermediate nodes list
subcommands. Inherited global flags and hidden internal flags are
excluded so the schema describes just that command.
- Reusable registry (cobraSchemaRoots); event is the first consumer and
more command trees can opt in without further wiring.
Docs: mono + dingtalk-event skills document the contract and the two
schema surfaces; design notes in docs/event-subprocess-contract.md.
wxianfeng