feat(antigravity): queue follow-up turns sequentially instead of cancelling active prompt - #11628
feat(antigravity): queue follow-up turns sequentially instead of cancelling active prompt#11628willblanchard wants to merge 2 commits into
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…elling active prompt
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ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — The production adapter changes the established Antigravity send behavior: concurrent follow-ups now queue and execute as separate turns instead of cancelling active work. This user-visible runtime change affects all Antigravity sessions and is not an off-by-default option or mechanical refactor. You can add or adjust custom eligibility rules. Learn more. |
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| return yield* context.turnQueue | ||
| .withPermit( |
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When multiple sendTurn calls overlap, this semaphore orders them only after buildAntigravityPrompt and model resolution have completed. An earlier follow-up containing a large attachment can still be reading from disk when a later text-only follow-up reaches this line, allowing the later message to acquire the permit and execute first. Acquire the queue position before asynchronous prompt preparation so agent input preserves user submission order.
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| const requestedModel = input.modelSelection?.model ?? context.session.model; | ||
| const configOptions = yield* context.runtime.getConfigOptions; | ||
| const model = resolveAntigravityModel({ | ||
| configOptions, | ||
| model: requestedModel, | ||
| defaultModel: yield* options.defaultModel ?? Effect.succeed(undefined), |
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When a queued turn explicitly changes the model and another queued turn omits modelSelection, the latter snapshots context.session.model here before the preceding turn applies its selection. For example, with model A active, queuing a turn for B and then a turn without a selection causes the last turn to switch back to A instead of inheriting B. Defer the session-model fallback and resolution until this turn holds turnQueue.
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🚧 Files skipped from review as they are similar to previous changes (2)
Included review availability: Your plan provides up to 10 included reviews per hour; 5 remain after this review. 📝 WalkthroughWalkthroughAntigravity sessions now serialize turns through a session queue. Each turn receives a new turn ID and emits lifecycle events. Tests now verify queued follow-ups, model inheritance, failed sends, and idle settlement after steer scenarios. ChangesAntigravity turn queue
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Client
participant sendTurn
participant turnQueue
participant NativePrompt
participant TurnEvents
Client->>sendTurn: submit first turn
sendTurn->>turnQueue: acquire permit
turnQueue->>NativePrompt: start prompt
Client->>sendTurn: submit follow-up turn
sendTurn->>turnQueue: wait for permit
NativePrompt->>TurnEvents: emit turn.completed
turnQueue->>NativePrompt: start follow-up with effective model
NativePrompt->>TurnEvents: emit turn.completed
Merge Risk: ⚪ Minimal · up to Queued follow-up turns retain FIFO execution and recover after failures or cancellation, with no identified issue requiring changes before merge. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@apps/server/src/provider/Layers/AntigravityAdapter.test.ts`:
- Around line 617-618: Update the second follow-up fiber creation in the test to
call Effect.forkChild with { startImmediately: true }, ensuring sendTurn reaches
context.turnQueue before the queue-blocking assertions. Keep the existing
hasActivePrompt and calls.slice(marker) assertions unchanged.
In `@apps/server/src/provider/Layers/AntigravityAdapter.ts`:
- Around line 1031-1049: Move effective model resolution using requestedModel
and context.session.model to after context.turnQueue acquires its permit, so
queued turns observe preceding session model changes. Retain safe pre-queue
validation only for explicitly supplied model input, and validate the resolved
model after acquisition before continuing the turn flow.
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apps/server/src/provider/Layers/AntigravityAdapter.test.tsapps/server/src/provider/Layers/AntigravityAdapter.ts
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| Effect.tapError((cause) => | ||
| Effect.suspend(() => | ||
| intent | ||
| ? context.promptLock.withPermit( | ||
| finishTurn(intent, { state: "failed", errorMessage: cause.message }), |
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When an active prompt fails while a follow-up is waiting, turnQueue.withPermit(...) releases its permit before this downstream error handler runs. The follow-up can then start and increment context.generation; when this handler eventually calls finishTurn, its generation guard rejects the original intent, so the failed turn never emits turn.completed and remains permanently active in the projected thread. This is especially reachable for sign-in errors because the preceding onAuthRequired effect may yield before settlement; keep the failure and interruption cleanup inside the queue permit so the next turn cannot start first.
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Summary
Matches the user experience of Codex and Claude Code where follow-up messages are queued behind an in-flight turn rather than aggressively aborting and cancelling the active prompt.
Problem & User Impact
Currently, submitting a message in the composer while an Antigravity turn is active aggressively cancels the active prompt:
Solution
turnQueue: Semaphore.Semaphore(1)toSessionContextinAntigravityAdapterto serialize turns sequentially FIFO.turn.startedandturn.completedlifecycle events.interruptTurn) continues to interrupt and cancel immediately viapromptLock.Summary by CodeRabbit