Handle message.part.delta events for streaming text/reasoning output #25

nandajavarma commented 2026年02月17日 08:43:10 +01:00

With opencode release https://github.com/anomalyco/opencode/releases/tag/v1.2.0,
now have message.part.delta events for streaming incremental text and reasoning
content. This client was not handling this and all the streaming text and
reasoning output where getting dropped. Was getting a lot of these errors:
[2026年02月17日 08:01:21] WARNING: unhandled message type

Signed-off-by: Nandaja Varma nandaja.varma@gmail.com

With opencode release https://github.com/anomalyco/opencode/releases/tag/v1.2.0, now have `message.part.delta` events for streaming incremental text and reasoning content. This client was not handling this and all the streaming text and reasoning output where getting dropped. Was getting a lot of these errors: [2026年02月17日 08:01:21] WARNING: unhandled message type Signed-off-by: Nandaja Varma <nandaja.varma@gmail.com>

sczi commented 2026年02月23日 22:05:56 +01:00

thanks a lot for the contribution to keep it working with the latest opencode versions. This should be addressed now in a788d81. For me in the latest version (1.2.10) the value of field is not sometimes reasoning and sometimes text, but always text, even for reasoning blocks. So I need to make a hash table with all the part ids, and remember the type from the message event creating that part. Also I just used the existing opencode-session--update-part function which worked also for this new message type after minimal changes, rather than creating a new opencode-session--handle-part-delta function.

thanks a lot for the contribution to keep it working with the latest opencode versions. This should be addressed now in a788d81. For me in the latest version (1.2.10) the value of `field` is not sometimes `reasoning` and sometimes `text`, but always `text`, even for reasoning blocks. So I need to make a hash table with all the part ids, and remember the type from the message event creating that part. Also I just used the existing `opencode-session--update-part` function which worked also for this new message type after minimal changes, rather than creating a new `opencode-session--handle-part-delta` function.