Félix Malfait
d709467902
## Context Investigating a report where the AI chat showed only a `...` spinner while the network response clearly contained `No AI models are available`. Root cause: terminal stream failures reach the client on **two mismatched channels**. | Representation | Persisted (survives reload) | Rendered by client | |---|---|---| | AI-SDK `error` chunk (inside `stream-chunk`) | ✅ RPUSH'd to Redis | ❌ dropped by `readUIMessageStream` (no message part, no error state) | | typed `stream-error` event | ❌ never persisted | ✅ sets the error atom | Live, the `stream-error` event renders. But on reload, `chatStreamCatchupChunks` replays only the persisted **error chunk** — which the reducer discards — and the streaming indicator never clears. ## Change Collapse to a single typed error contract: - **Suppress the opaque `error` chunk** in the stream job; every failure is surfaced through the typed `stream-error` event. Errors are mapped via `mapErrorToStreamError` so an `AiException` keeps its `AiExceptionCode` (e.g. `API_KEY_NOT_CONFIGURED` → the existing "AI not configured" banner) instead of leaking a raw string. - **Persist the terminal error** next to the accumulated chunks and expose it as an explicit `error { code message }` field on `ChatStreamCatchupChunks`, so a client catching up after a reload recovers it — no dependency on the AI SDK's internal chunk shape. - **Reset per-thread stream state at job start**, so a failed turn's leftover chunks/error never replay on the next stream. - **Client replays the catchup error** as a terminal `stream-error` event, which clears the streaming indicator and renders the error (fixes the infinite spinner on a stream that ended in error). ## Notes - `ChatStreamError` is a new metadata GraphQL type; generated types (twenty-front metadata + client-sdk) were hand-updated to keep the tree consistent and will be reconciled by CI's `graphql:generate` check if anything differs. - Server unit test added for the error mapping. No schema/DB migration. ## Test plan - [ ] With no AI provider configured, send a chat message → error renders immediately (not a spinner). - [ ] Reload the thread → the error still renders (recovered from catchup), indicator not spinning. - [ ] Configure a provider and send again → normal streaming; no stale error from the previous failed turn. <!-- This is an auto-generated description by cubic. --> <a href="https://cubic.dev/pr/twentyhq/twenty/pull/22434?utm_source=github" target="_blank" rel="noopener noreferrer" data-no-image-dialog="true"><picture><source media="(prefers-color-scheme: dark)" srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source media="(prefers-color-scheme: light)" srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img alt="Review in cubic" src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a> <!-- End of auto-generated description by cubic. -->
The #1 Open-Source CRM
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
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Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the 
User Guide for product walkthroughs, or the Documentation for developer reference.
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Stack
TypeScript
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NestJS, with BullMQ, 
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React, with Jotai, Linaria and Lingui
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Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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