The tool loop and the answer-writing stream shared one 110s AbortSignal.
Mastra 1.50 does not throw on abort: it emits an abort chunk and
finish(tripwire) and closes normally, so a half-written answer reached
onComplete, was charged and persisted as completed.
- Compose, length continuation and answer retry run on a 70s answer clock
started on first use (worst case 110s + 70s = 180s; maxDuration 240).
- Settlement requires finish=stop from the stream that wrote the answer;
abort/tripwire, content-filter, tool-calls, other/unknown/error or a
missing finish with visible text ends as answer_truncated (cancel, no
charge). The abort chunk records an abort runtime step; a cut stream no
longer flushes its dangling Pass 4 sentence. length still continues.
- [agent-observability] gains composeFinishReason, composeAborted and
answerVisibleChars (enum/boolean/count only).
- Regression tests use a real Mastra Agent over a fake model; the BUG-305
hand-thrown DOMException fixture is kept with a three-column note, and
eleven fixtures gain the finish(stop) chunk real streams always carry.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8
