Shaojin Wen 10621b3a93 fix(external-context): read the response body with a reader, not for-await (#8764) ... * fix(external-context): read the response body with a reader, not for-await Async-iterating a ReadableStream needs [Symbol.asyncIterator] on the TYPE, and whether it is there depends on which lib set the program resolves — @types/node's stream has it, the DOM lib's needs lib.dom.asynciterable. That resolution flipped underneath this file on 2026-08-08: #8693 installed @types/jsdom at the root, vitest's types pull the jsdom types in wherever they exist, and jsdom's carry /// <reference lib="dom" />. #8693 shipped the tsconfig `types` guard in the same commit, so main stayed green — but the guard travels with the BRANCH while node_modules travel with the TRUSTED BASE in the autofix verification build, so every managed branch behind #8693 failed that build with TS2504 on this line. Two legs measured on run 31276008548: 63 minutes of accepted agent work discarded per round, 18 more minutes burned by a repair step that cannot fix a failure outside the PR's diff (#8614 reached attempt 13 that way; #8616 died identically). Reproduced locally in both directions before changing anything: @types/jsdom installed + guard removed = the gate's exact error, character for character; with the reader loop the same poisoned setup builds clean. The guard stays — belt and suspenders — but the build no longer depends on it, or on which lib set any future environment resolves. Behavior is unchanged and now pinned by tests the file never had: multi-chunk assembly, the exact MAX_RESPONSE_BYTES boundary (bound is strictly-greater), invalid-UTF-8 rejection, and the easy one to drop in this rewrite — cancelling the stream on early exit, which `for await` did implicitly via iterator return(). Mutation-tested: removing the cancel fails exactly that test against an endless producer. The package's other for-awaits iterate process.stdin (a Node stream, async-iterable in every lib set) and are untouched. * fix(external-context): await stream cancellation before rejecting the request On early exit from the reader loop (the oversize throw) cancellation was started fire-and-forget, so postJson() rejected while the stream's teardown was still settling — `for await` had awaited its implicit iterator return() before propagating. An immediate retry could overlap the previous response transport's unfinished cancellation. Await reader.cancel() before releaseLock(), and pin the sequencing with a deferred-cancel regression test that fails against the fire-and-forget form. Also cover read() rejecting after a partial chunk was received: the error maps to the request-did-not-complete transport error rather than EOF-then-parse of the partial JSON, and the reader lock is still released. * fix(external-context): drop the types guard the reader rewrite made obsolete The `"types": ["node"]` override existed solely to keep @types/jsdom's lib.dom out of this program while http-client.ts read the response body with `for await` — the DOM lib's ReadableStream is not async-iterable, and the flip broke the build with TS2504 (#8693). The reader loop that replaced the `for await` types identically in every lib set, so the guard is no longer load-bearing: with it removed, lib.dom re-enters the program and the package still builds cleanly. Drop it with its stale comment instead of leaving maintainers two contradicting stories about whether it is needed. Also export MAX_RESPONSE_BYTES and import it in the boundary tests instead of re-declaring it locally, so the tests pin the real constant rather than a copy that can silently drift. * test(external-context): make the invalid-UTF-8 test pin fatal decoding --------- Co-authored-by: verify <verify@local> Co-authored-by: qwen-code-dev-bot <qwen-code-dev@service.alibaba.com>		2026-08-09 07:42:04 +00:00
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external-context	fix(external-context): read the response body with a reader, not for-await (#8764)	2026-08-09 07:42:04 +00:00