fix(kiro): validate terminal streams before emitting output

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Validate AWS EventStream framing, header bounds, CRCs, error frames,
and terminal stop metadata before exposing Kiro output. Classify stop
reasons into dispositions (complete / retryable / terminal_incomplete /
refusal) and retry once when the stream ends with a malformed tool call,
ellipsis-only output, or a short future-action sentence.

Fail closed: propagate streaming failures as error SSE (502) instead of
collapsing them into a successful stop, so incomplete responses no longer
leak as final answers.

Detect the observed evidence-prefixed trailing progress final without
broadening the Chinese heuristic to completed findings.

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Edison42 authored and decolua committed 2026-07-20 10:55:33 +07:00

1 parent 9ba8f37486

commit 7c7fae3955

5 files changed

+1912 -429

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