fix(sdk,webapp): stop chat losing a message sent right after an action#4234
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ericallam merged 1 commit intoJul 11, 2026
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🦋 Changeset detectedLatest commit: 96e5ad3 The changes in this PR will be included in the next version bump. This PR includes changesets to release 28 packages
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WalkthroughRealtime append methods now return the appended sequence number, and both append routes include it in successful responses. The chat SDK propagates this value through message and action sends, passes it to stream subscriptions, and skips earlier 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
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## Summary 2 new features, 11 improvements, 5 bug fixes. ## Breaking changes - Trigger.dev v3 is no longer supported. For self-hosted deployments, 4.5.0 is the last version we officially support for running v3; stay on 4.5.0 or upgrade to v4. v3 triggers, batch triggers, reschedules, and deploys now return a clear upgrade message instead of running. ([#4236](#4236)) ## Improvements - You can now mark environment variables synced via the `syncEnvVars` build extension as secrets. Return `{ name, value, isSecret: true }` from your callback and those variables are stored redacted in the dashboard, just like manually created secret env vars. ([#4203](#4203)) - Remove the legacy `--mcp` and `--mcp-port` options from the `dev` command. Run the dedicated `trigger mcp` command to start the Trigger.dev MCP server. ([#4246](#4246)) - Removed the unused `ResourceMonitor` export from `@trigger.dev/core/v3/serverOnly`. It was a server-side logging helper with no remaining consumers. ([#4244](#4244)) - Removed the unused `@trigger.dev/core/v3/zodNamespace` export and the legacy v3 socket message schemas. These were only used by the now-retired v3 engine and have no v4 consumers. ([#4236](#4236)) ## Bug fixes - Fix a `chat.agent` message-loss race where sending a message right after an action (such as an undo) could drop the follow-up's response from the UI until a refresh. ([#4234](#4234)) ## Server changes These changes affect the self-hosted Docker image and Trigger.dev Cloud: - Added `EVENT_REPOSITORY_POSTGRES_WRITES_DISABLED` to skip all PostgreSQL task-event writes for deployments that store task events in ClickHouse. Leave it off unless `EVENT_REPOSITORY_DEFAULT_STORE` is `clickhouse_v2`, otherwise task events are lost. ([#4242](#4242)) - Promo credits: a /promo signup landing page, redeeming a promo code when a new org selects a plan, and showing remaining credits on the usage page. ([#4138](#4138)) - Speed up retrieving a background worker by version. The endpoint no longer runs a slow lookup that scanned the full task table for large deployments; it now reuses data it already loads, so the response is the same but returns much faster. ([#4245](#4245)) - Clearer login error when an email address is blocked by the WHITELISTED_EMAILS setting: the message now explains the address isn't allowed on this instance instead of the ambiguous "This email is unauthorized". ([#4220](#4220)) - Make the native build server the default in project build settings. It's now opt-out, stored as a new `disableNativeBuildServer` key. Also clarifies in the UI that build settings apply to GitHub-triggered and native build server deployments. ([#3980](#3980)) - Optionally process high-volume telemetry ingestion in parallel for higher throughput under heavy load by setting `OTEL_TRANSFORM_WORKER_POOL_ENABLED=1`. Off by default. ([#4232](#4232)) - Add a `REALTIME_BACKEND_DEFAULT` env var to choose the default realtime backend (`electric`, `native`, or `shadow`) for environments whose org has no per-org override. Defaults to `electric`, so existing behavior is unchanged. ([#4231](#4231)) - Clarified on the Regions page that a region only affects where your runs execute, not where your data is stored. This shows as a tooltip on the Location column and in the confirmation dialog when you change your default region. ([#4226](#4226)) - Improved the reliability of how run data is read and written. ([#4237](#4237)) - Fixed stale login errors: an error from a previous login attempt (for example a rejected email address) no longer keeps reappearing on the login page and no longer makes later, successful attempts look like they failed. ([#4220](#4220)) - The Errors page now shows better details for each error. Errors that don't carry a message — such as errors thrown without a message, or values thrown that aren't `Error` objects — get a meaningful title instead of all reading "Unknown error", and are grouped by their name (or value) rather than collapsed into a single group. The error type now shows the actual error name, and stack traces now appear where previously they were missing. ([#4225](#4225)) - Return a clear client error when SSO form submissions use an unsupported content type ([#4238](#4238)) - Query page: extracting fields from a run's output with JSON functions (such as JSONExtractString or JSONExtractInt) no longer fails with an "illegal type: JSON" error. ([#4221](#4221)) <details> <summary>Raw changeset output</summary> # Releases ## @trigger.dev/build@4.5.4 ### Patch Changes - You can now mark environment variables synced via the `syncEnvVars` build extension as secrets. Return `{ name, value, isSecret: true }` from your callback and those variables are stored redacted in the dashboard, just like manually created secret env vars. ([#4203](#4203)) - Updated dependencies: - `@trigger.dev/core@4.5.4` ## trigger.dev@4.5.4 ### Patch Changes - Remove the legacy `--mcp` and `--mcp-port` options from the `dev` command. Run the dedicated `trigger mcp` command to start the Trigger.dev MCP server. ([#4246](#4246)) - Updated dependencies: - `@trigger.dev/core@4.5.4` - `@trigger.dev/build@4.5.4` - `@trigger.dev/schema-to-json@4.5.4` ## @trigger.dev/core@4.5.4 ### Patch Changes - Removed the unused `ResourceMonitor` export from `@trigger.dev/core/v3/serverOnly`. It was a server-side logging helper with no remaining consumers. ([#4244](#4244)) - Removed the unused `@trigger.dev/core/v3/zodNamespace` export and the legacy v3 socket message schemas. These were only used by the now-retired v3 engine and have no v4 consumers. ([#4236](#4236)) ## @trigger.dev/python@4.5.4 ### Patch Changes - Updated dependencies: - `@trigger.dev/sdk@4.5.4` - `@trigger.dev/core@4.5.4` - `@trigger.dev/build@4.5.4` ## @trigger.dev/react-hooks@4.5.4 ### Patch Changes - Updated dependencies: - `@trigger.dev/core@4.5.4` ## @trigger.dev/redis-worker@4.5.4 ### Patch Changes - Updated dependencies: - `@trigger.dev/core@4.5.4` ## @trigger.dev/rsc@4.5.4 ### Patch Changes - Updated dependencies: - `@trigger.dev/core@4.5.4` ## @trigger.dev/schema-to-json@4.5.4 ### Patch Changes - Updated dependencies: - `@trigger.dev/core@4.5.4` ## @trigger.dev/sdk@4.5.4 ### Patch Changes - Fix a `chat.agent` message-loss race where sending a message right after an action (such as an undo) could drop the follow-up's response from the UI until a refresh. ([#4234](#4234)) - Updated dependencies: - `@trigger.dev/core@4.5.4` </details> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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Summary
Sending a chat message immediately after an action (for example an undo) could make the message's response vanish from the UI. The transport opened a response stream that closed on the earlier turn's completion instead of waiting for the send's own turn. The agent still produced and persisted the answer, so it reappeared on refresh. Same "disappearing message" class as #4176, different cause.
Fix
A send's response stream had no way to tell whether a
turn-completebelonged to its turn.POST /realtime/v1/sessions/:id/in/appendnow returns the appended record's sequence number, and the transport skips any turn-complete whosesession-in-event-id(the agent's committed.incursor) is below that seq, closing only on its own turn. Older webapps omit the seq, in which case the transport falls back to the previous behavior, so the SDK and server can ship independently.Because the fix spans the SDK and the server, both a webapp deploy and an SDK release are needed for the full effect.
Verified end to end with the ai-chat reference app: undo-then-immediate-send loses the follow-up's answer before the fix and streams it inline after, with a revert-the-guard run reproducing the loss on the same script. Unit tests cover the skip and the no-seq fallback.