fix(runtime): detect SSE stream truncation and auto-continue from partial response#82
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yishuiliunian merged 2 commits intomainfrom Apr 5, 2026
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…tial response (#79) When an API proxy silently drops SSE connections mid-stream (no `message_stop` event), the agent loop previously treated the truncated response as a normal EndTurn — causing sub-agents to exit with incomplete output (e.g. "Let me create the file." without the Write tool call). Detection: track `received_done` in the stream loop; EOF without Done and without cancel sets `stream_error = true`. Recovery: stream_error with partial content triggers auto-continue (record text, discard incomplete tool_uses, re-call LLM) — same pattern as MaxTokens/PauseTurn. Bounded by `max_auto_continuations`. Cancel safety: cancel paths are excluded from both truncation detection (llm.rs) and auto-continue (turn_exec.rs) to preserve existing cancel behavior. Also extracts stop-hook and observer dispatch into `turn_observer_dispatch.rs` as an independent lifecycle extension point.
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Summary
message_stop) by trackingreceived_doneinllm.rsmax_auto_continuationsChanges
llm.rs:received_doneflag + post-loop truncation check (excludes cancel)llm_result.rs: expandedstream_errordocturn_exec.rs:stream_truncatedauto-continue branch + partial text preservation on cancel/errorturn_observer_dispatch.rs(new): extracted stop-hook and observer dispatch as lifecycle extension pointContext
Sub-agents behind an API proxy would output text like "Let me create the file." then exit without executing the Write tool — because the proxy silently cut the SSE connection and the agent loop treated the truncated stream as a normal EndTurn.
Test plan
bazel test //crates/loopal-runtime:loopal-runtime_test— 219 tests passbazel build //... --config=clippy— zero warnings