Conversation
…tion
The input-capture bridge pushed the contenteditable's mid-composition
pre-edit text into aui.composer.setText, which made the package's
SyncPlugin rebuild the editor mid-keystroke, cancelling the composition
and committing each pre-edit stage as literal text ("n ni nihao 你好").
The bridge itself stays — it is the only path the jsdom suite's
synthetic input (setComposerText) takes into the store, since Lexical's
editor-state commits never fire there — but it is now closed while
composing and re-syncs once on compositionend: snapshot the text at
capture time, prefer the finalized DOM one macrotask later (WebKit
finalizes only after the event), and fall back to the snapshot when
Lexical has re-owned the DOM in between.
Closes tinyhumansai#5763
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How this change flows0 changed behaviours across 6 relationships. 6 surrounding behaviours are shown (60 graph nodes walked). 50 further behaviours left out to keep the diagram readable. flowchart LR
n0["store"]:::impacted
n1["Composer"]:::impacted
n2["ThreadComponentsContext"]:::impacted
n3["ThreadRoot"]:::impacted
n4["Thread"]:::impacted
n5["renderStreamingConversation"]:::impacted
n1 -->|uses| n2
n3 -->|uses| n1
n3 -->|uses| n2
n4 -->|uses| n2
n4 -->|uses| n3
n5 -->|uses| n0
classDef changed fill:#0d4429,stroke:#238636,color:#e6edf3
classDef impacted fill:#161b22,stroke:#6e7681,color:#c9d1d9
classDef flagged fill:#5a1e02,stroke:#d93f0b,color:#ffffff
classDef blocking fill:#67060c,stroke:#f85149,color:#ffffff
Green: changed behaviour. Grey: surrounding behaviour. Arrows name the call, use, implementation, or test relationship. Orange: has findings. Red: has a finding that blocks the merge. |
tinysweeper
Bot
added
the
priority: p3
|
No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (2)
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe composer tracks IME composition state and skips DOM-to-store synchronization for composing input. On ChangesIME Composer Synchronization
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to This change prevents pre-edit IME text from being written to the composer store while preserving normal text-entry synchronization; no actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: Poem
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Full details: Linked Issues checkExplanation The changes address issue Full details: Out of Scope Changes checkExplanation The changes are limited to IME composition handling in the chat composer and its regression test. They align with issue Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2 files. Warning Your free Security trial is over. An organization admin can activate billing to continue. Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
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| const textAtCompositionEnd = target.textContent ?? ''; | ||
| globalThis.setTimeout(() => { | ||
| const finalized = target.textContent ?? ''; | ||
| aui.composer.setText(finalized || textAtCompositionEnd); |
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When a WebKit user cancels an IME composition in an otherwise empty composer, the capture-phase snapshot can still contain the pre-edit text while the finalized DOM correctly becomes empty. The finalized || textAtCompositionEnd fallback treats that valid empty result as absent and writes the canceled pre-edit text into the composer store, so pressing Escape can leave text the user explicitly discarded. Distinguish Lexical re-owning the DOM from a genuinely empty/canceled composition rather than using truthiness.
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Addressed in 6c8651f: compositionend now only re-opens the gate — no store write of its own. The commit's own input event (isComposing false) flows through the ordinary bridge once the gate is open, and in a real browser SyncPlugin's compositionend commit remains the authoritative sync. This removes both the race with a composition starting inside the same macrotask, and the resurrection of pre-edit text from a cancelled composition when the finalized DOM is legitimately empty.
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Inline comments:
In `@app/src/components/assistant-ui/thread.tsx`:
- Around line 421-423: Update the zero-delay callback in the composition
handling around isComposingTextRef and aui.composer.setText to recheck
isComposingTextRef.current before synchronizing text; skip the stale callback
when a new composition is active, allowing compositionend to perform the final
synchronization.
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app/src/components/assistant-ui/thread.tsxapp/src/pages/__tests__/Conversations.render.test.tsx
Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.
Address review feedback on the composition gate: the deferred compositionend write raced a composition started inside the same macrotask (cancelling it), and its pre-edit fallback resurrected the text of a cancelled composition when the finalized DOM was legitimately empty. compositionend now only re-opens the gate — the commit's own input event (isComposing false) flows through the ordinary bridge, and in a real browser SyncPlugin's commit remains the authoritative sync.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
… the IME composer bridge (tinyhumansai#5763) Two new spec files, no product change. Both areas were uncovered: the existing ~14 chat specs cover mid-stream failure and Enter-key suppression during IME composition, neither of which is what these two issues report. app/test/playwright/specs/chat-pre-stream-failure.spec.ts Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion request (the mock backend's `httpFaultRules` engine, via /__admin/behavior — no shared harness file is touched) kills the turn before any stream event, so no `chat_error` is published and the UI shows nothing until `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the product should have and is marked `test.fail()`, so it flips to a hard failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the turn is silently dropped (an empty assistant bubble mounts, no banner, the scripted answer never arrives) and the composer still recovers for a retry. Each test gates on a `/__admin/requests` poll proving the turn actually reached the LLM route, so "no banner" cannot be confused with "the send never left the client" — which is exactly what the first draft got wrong. app/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately prop-wins and composition-unaware, so every intermediate IME pre-edit value is written back into the composer store — i.e. the textarea's value is assigned mid-composition, which is what commits the pre-edit buffer and produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it makes the seam visible so any of them turns these tests red. Every test was revert-checked and fails with its own assertion named.
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Thanks for this, @ligjn — you reported #5763 and you fixed it first, and this is a close call decided on one browser-support constraint rather than on quality. Why #5775 is the one we're taking: it writes the committed text on But we hard-support Safari 16.6, and WebKit does not emit the trailing Your So: the analysis in this PR is right, the comments in it are the clearest write-up of the bug anyone produced, and half of it is landing. Sorry it's arriving under someone else's number. |
…egins The store write is deferred by a microtask, so a fast CJK typist can open the next composition before it runs. That stale write rebuilds the editor mid-composition and cancels it -- tinyhumansai#5763 again, one composition later. Gate it on an `isComposingTextRef` set at `compositionstart` and cleared at `compositionend`, checked INSIDE the queued microtask rather than only at event time. The `compositionend` write stays, so WebKit -- which emits no trailing `input` with `isComposing === false` -- still gets the committed text. Dropping a stale write loses nothing: the DOM is the source of truth and the next commit reads the whole of it. The guard is @ligjn's, from tinyhumansai#5764, which named both hazards. Tests: the race (a second `compositionstart` before the queued write runs) and a cancelled composition that finalizes empty.
… the IME composer bridge (tinyhumansai#5763)\n\nTwo new spec files, no product change. Both areas were uncovered: the\nexisting ~14 chat specs cover mid-stream failure and Enter-key suppression\nduring IME composition, neither of which is what these two issues report.\n\napp/test/playwright/specs/chat-pre-stream-failure.spec.ts\n Reproduces tinyhumansai#5729 end to end. A connection reset injected on the completion\n request (the mock backend's `httpFaultRules` engine, via /__admin/behavior —\n no shared harness file is touched) kills the turn before any stream event,\n so no `chat_error` is published and the UI shows nothing until\n `armSilenceTimer`'s 120s watchdog. The first test asserts the behaviour the\n product should have and is marked `test.fail()`, so it flips to a hard\n failure the day tinyhumansai#5729 is fixed. The other two pin what users get today: the\n turn is silently dropped (an empty assistant bubble mounts, no banner, the\n scripted answer never arrives) and the composer still recovers for a retry.\n\n Each test gates on a `/__admin/requests` poll proving the turn actually\n reached the LLM route, so "no banner" cannot be confused with "the send\n never left the client" — which is exactly what the first draft got wrong.\n\napp/src/components/chat/composer/__tests__/useComposerTextBridge.ime.test.tsx\n Pins the tinyhumansai#5763 mechanism. `useComposerTextBridge` is deliberately\n prop-wins and composition-unaware, so every intermediate IME pre-edit value\n is written back into the composer store — i.e. the textarea's value is\n assigned mid-composition, which is what commits the pre-edit buffer and\n produces the reported `nihao` -> `n ni nihao 你好` accumulation. Three\n community PRs are open (tinyhumansai#5791, tinyhumansai#5775, tinyhumansai#5764); this does not pick one, it\n makes the seam visible so any of them turns these tests red.\n\nEvery test was revert-checked and fails with its own assertion named.\n
…egins\n\nThe store write is deferred by a microtask, so a fast CJK typist can open\nthe next composition before it runs. That stale write rebuilds the editor\nmid-composition and cancels it -- tinyhumansai#5763 again, one composition later.\n\nGate it on an `isComposingTextRef` set at `compositionstart` and cleared\nat `compositionend`, checked INSIDE the queued microtask rather than only\nat event time. The `compositionend` write stays, so WebKit -- which emits\nno trailing `input` with `isComposing === false` -- still gets the\ncommitted text. Dropping a stale write loses nothing: the DOM is the\nsource of truth and the next commit reads the whole of it.\n\nThe guard is @ligjn's, from tinyhumansai#5764, which named both hazards.\n\nTests: the race (a second `compositionstart` before the queued write runs)\nand a cancelled composition that finalizes empty.\n
2 participants
Summary
nihao+ commit leavesn ni nihao 你好). Root cause is the host-side DOM→store bridge inthread.tsxpushing the contenteditable's mid-compositiontextContentintoaui.composer.setText.compositionend(capture-phase snapshot + finalized-DOM read one macrotask later, falling back to the snapshot when Lexical has re-owned the DOM in between).Conversations.render.test.tsxthat fails against the unguarded bridge and passes with the gate.Problem
onInputCapturehandler onLexicalComposerInputread the raw DOMtextContenton everyinputevent — including per-keystrokeinsertCompositionTextduring an IME composition — and pushed it into the composer store viaqueueMicrotask.SyncPlugin'slastSyncedTextRef. The plugin's runtime→Lexical apply path then rebuilds the editor (root.clear()+ re-create) mid-composition, destroying the composition node. The IME cancels the composition and commits the current pre-edit as literal text; the cycle repeats per keystroke —n,ni,nihaoall leak as literal text before the final你好.Solution
Conversations.render.test.tsx: jsdom drives the composer by settingtextContentand firing a syntheticinputevent (setComposerText), which never reaches Lexical's editor-state commits, so the bridge is the only path from that input into the store. In a real browser the package'sSyncPluginalready owns editor-state→store sync (composition-safe:isComposingguards + idempotentlastSyncedTextRef), so the gated bridge is redundant there for plain text and inert during composition.thread.tsx):isComposingTextRefset byonCompositionStartCapture/onCompositionEndCapture(capture phase — the same channel the existingonInputCaptureuses).onInputCapturereturns early while composing, and also when the input event itself reportsisComposing.compositionend: snapshottextContentat capture time, thensetTimeout(0)and prefer the finalized DOM — Chrome finalizes the composed DOM before the event, WebKit only after it, and Lexical re-owns (may clear) the DOM while handling that same event, so neither a purely synchronous nor a purely deferred read is correct everywhere. The fallback keeps the jsdom bridge path working.Submission Checklist
Conversations.render.test.tsx› "keeps IME pre-edit text out of the composer store until the composition commits (Chat composer cancels IME composition mid-keystroke and commits pre-edit text as literal characters #5763)": mid-composition input must NOT enable the send action; the committed composition must. Verified it fails against the unguardedmaincode and passes with the gate.thread.tsx(composition active / eventisComposing/ end-of-composition sync incl. fallback) are all exercised by the new test; full Vitest suite green locally (8461 passed / 0 failed).## Related— N/A: no matrix feature IDs map to the composer input bridgeCloses #NNN— see## RelatedImpact
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Linear Issue
Commit & Branch
fix/composer-ime-compositione9ffab614Validation Run
pnpm --filter openhuman-app format:checkpnpm typecheck(viapnpm compile)vitest run --config test/vitest.config.ts src/pages/__tests__/Conversations.render.test.tsx→ 55/55 passed; fullpnpm test→ 8461 passed / 0 failedpnpm rust:clippyrun via the pre-push hook (see Validation Blocked note on the first attempt)Validation Blocked
command:—error:—impact:— none. (The firstgit pushfailed because the pre-push hook'scargo fmt/rust:clippysteps tried to download the rustup 1.96.1 toolchain with rust-docs over a proxied network and timed out; installing the toolchain with--profile minimalresolved it. Not a code issue.)Behavior Changes
compositionend.nihao+ commit →你好) instead of leakingn ni nihao 你好; all other input paths behave as before.Parity Contract
onInputCapturepath when not composing); Enter-to-send unchanged (packageKeyboardPluginguardsisComposing; host keyCode-229 guard untouched); attachment-only send and itssetText('')untouched;ComposerTextBridgedraft/programmatic writes untouched.Conversations.render.test.tsx(55 tests, incl. the new one) green; full suite green.Duplicate / Superseded PR Handling
thread.tsxand IME/composition keywords)Summary by CodeRabbit
Bug Fixes
Tests