What
A subagent is a helper Claude starts to do part of a job. When one is cut off before finishing, Claude Code recovers what it had produced and adds a note saying everything below is partial output. That note is now built by a shared routine instead of being written out in place, and the conversation history passed on with it is the filtered one.
Why
The wording the model sees when a subagent is cut off may differ from before.
e.message
spans modified, high confidence
| `gen_ai.input.messages` | `string` | <Badge>Content</Badge> A JSON string that follows the OpenTelemetry [`InputMessages`](https://github.com/open-telemetry/semantic-conventions-genai/blob/e57c543b4889619eb2a05702471937db5119165d/model/g…see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
e.message on spans