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fix(core): dedupe reply stream sends and simplify censor handling - #1058
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WalkthroughReplyStream 移除即时标记消息队列，并直接以 Changes回复流处理
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Suggested reviewers: Merge Risk: ⚪ Minimal · up to
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标题准确概括了主要变更：修复回复流重复发送，并简化审核处理。 |
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描述说明了重复回复的原因、修复方式、审核处理变更和验证结果，与变更内容相关。 |
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小兔捧着流光跑，
标记分段轻轻跳。
终结帧来收好尾，
思考消息挥手告。
审核接口在，消息过一遭。
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Inline comments:
Review comments at @packages/core/src/render/stream.ts:
- Line 43: 更新 `stream.ts` 中根据 `ctx.censor`、`config.censor` 和 `opts.censor`
设置审核状态的逻辑：启用审核但 `ctx.censor` 尚未加载时，阻止流式发送和 `sendMessage`
发送，并报告错误；不要将审核状态降级为未审核发送。
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packages/core/src/render/stream.ts
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🔇 Additional comments: 1
packages/core/src/render/stream.ts-187-187: 1
187-187: 🔒 Security & Privacy | 🟠 Major | ⚡ Quick win
⚠️ Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.审核服务缺失时不要发送未审核内容。
当
config.censor或opts.censor启用审核，而ctx.censor未加载时，此分支直接返回原消息。sendMessage随后仍会发送该消息。请在发送前终止请求，而不是跳过已启用的审核。此前的评审已提出相同的安全问题；本次改动使该问题再次出现。(raw.githubusercontent.com)
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packages/core/src/render/stream.ts
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ReplyStream.end() ran the full send path for any call, including
intermediate chunk-end signals emitted via `llm-new-chunk` between
agent rounds. When censor moderation forced buffer mode, an
intermediate end() arriving after `done` had been written would send
finalMessage once, and the subsequent end({done}) would send it
again — the same reply delivered twice, nondeterministically.
Now end() only finalizes on `done`/`error` frames; bare end() calls
are treated as the intermediate signals they are and ignored. This
makes the #1049 machinery unnecessary: instant marks go through
sendMessage directly (which already censors when the service is
loaded), dropping the `pending` queue, and `closed` becomes a simple
one-shot guard.
Missing censor service is skipped silently inside censor(), matching
how PresetPostHandler.handler treats an absent ctx.censor.
Co-Authored-By: Claude <noreply@anthropic.com>
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Problem
Replies were occasionally sent twice when censor moderation was enabled (global
censorconfig or a preset'spostHandler.censor). Reported as flaky — sometimes duplicated, sometimes not.Root cause
ReplyStream.end()ran the whole send path on every call, including the intermediate chunk-end signals emitted viallm-new-chunk(_finalizeStreaminllm-core/platform/model.tsdispatchesLLMNewChunkwithundefinedat the end of each LLM stream — agent loops fire it once per round).With moderation on, #1049 forced buffer mode and added a guard:
end()early-returns whilefinalMessage == null. But in an agent loop (or any sequence where adoneframe is written before a later chunk-end signal), an intermediateend()could arrive withfinalMessagealready set:end()→ guard passes →closed = true→ sendsfinalMessage(1st time) →finish()onResponse→end({done})→closedbranch →mode === 'buffer'→ sendsfinalMessageagain (2nd time)Whether it duplicated depended purely on signal ordering — hence the flakiness.
Fix
end()now only finalizes the reply ondone/errorframes. A bareend()is by definition an intermediate chunk-boundary signal and returns early — no partial send path can run twice, andclosedbecomes a simple one-shot guard.Simplification of #1049
With correct
end()semantics, most of the #1049 machinery is unnecessary:pendingmark queue removed — instant marks go throughsendMessagedirectly (which already censors whenmoderated), so tool-call marks keep their natural ordering before the buffered reply instead of being flushed after it.closed-branch re-send logic removed —doneis now the only finalize trigger, so the "already closed butdonearrived" re-send path can't be reached.moderatednow also requiresctx.censorto be loaded — previously enablingcensorwithout the censor service installed would crash onctx.censor.transform(...); matches the guardPresetPostHandler.handleralready had.Net: −28/+7 lines in
render/stream.ts, verified withyarn fast-build core(exit 0) and ESLint (clean).Behavior notes
stream.flush()atdone.done; additional reply messages (thought/usage forwards) still follow viasendAdditional.capture/silentdelivery: no-op as before.Fixes the regression introduced in da3b6d4 (#1049).