## Summary
Five hardening fixes across `@trigger.dev/sdk`, `@trigger.dev/core`, and
`@trigger.dev/build`.
- `tasks.triggerAndSubscribe` now forwards caller `requestOptions`
(custom API keys, per-request overrides) to the underlying
`apiClient.triggerTask` call instead of silently dropping them.
- `SSEStreamSubscription` no longer retries permanent client errors
forever. The default `nonRetryableStatuses` widens from `[404, 410]` to
`[400, 404, 409, 410, 422]`, so a malformed session-stream request fails
fast instead of busy-looping under bounded backoff.
- Session writer falls back to manually wiring the caller's
`AbortSignal` on Node 18, where `AbortSignal.any` is unavailable.
Caller-driven cancellation now propagates on every supported runtime.
- `TriggerChatTransport` throws immediately when a `chat.handover`
response is missing `X-Trigger-Chat-Access-Token`, instead of silently
downgrading every subsequent turn back to the handover path. `dispose()`
aborts every active `session.out` subscription before tearing the
coordinator down, so unmount/navigation no longer leaves SSE readers in
flight.
- Removed the experimental `@trigger.dev/build/extensions/secureExec`
build extension. It will return alongside the sandbox feature it was
built to support.
## Test plan
- [ ] `pnpm run build --filter @trigger.dev/sdk --filter
@trigger.dev/core --filter @trigger.dev/build`
- [ ] `pnpm --filter @trigger.dev/sdk test --run` (183 tests, including
chat / chat-server / sessions / handover)
- [ ] `pnpm --filter @trigger.dev/core test --run`
- [ ] Manually trigger a `chat.handover` whose response strips
`X-Trigger-Chat-Access-Token`, and confirm the transport throws
synchronously rather than degrading.
- [ ] Unmount a chat UI mid-stream and confirm the active `session.out`
SSE connection closes immediately.
Eric Allam
12d2125148