fix(session): stop prompt loop after model completion#19424
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May 8, 2026
…yco#19424) When finish='stop' (or 'unknown' with no tool activity), break out of the prompt loop immediately instead of continuing. Prevents the LLM from being called again after model completion, which caused the Anthropic prefill error ('conversation must end with a user message').
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Issue for this PR
Closes #17982
Refs #18096
Refs #11153
Type of change
What does this PR do?
This PR fixes a session loop termination bug after model completion.
finish=unknownas terminal only for non-tool responsesWhy this works:
How did you verify your code works?
bun test ./packages/opencode/test/session/session.test.ts(3 passed, 0 failed)Screenshots / recordings
N/A (non-UI change)
Checklist