Remove run.text accumulator and insertResponseTextOnce that caused
text blocks before and after tool calls to be concatenated into a
single message. Now response.output_text.done only sets finish_reason
without overwriting delta-accumulated content.
- Remove run.text, textInserted from ResponseRunState
- Remove insertResponseTextOnce method
- output_text.done only marks finish_reason='stop' on last message
- response.completed no longer calls insertResponseTextOnce
- Add 7 tests covering flush, abort, and multi-block text separation
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
ekko