Félix Malfait
fd7387928c
## Summary - **Queue messages while streaming**: Messages sent during active AI streaming are queued server-side and auto-flushed when the current stream completes. Frontend renders queued messages optimistically in a dedicated queue UI. - **Drop `@ai-sdk/react` + `resumable-stream`**: Replace the dual HTTP SSE + AI SDK client architecture with a single GraphQL SSE subscription per thread. All events (token chunks, message persistence, queue updates, errors) flow through Redis PubSub → GraphQL subscription. - **Server-driven architecture**: The server decides whether to queue or stream (via `POST /:threadId/message`). The frontend mirrors this decision for optimistic rendering but defers to the server response. - **Reuse AI SDK accumulation logic**: `readUIMessageStream` from the `ai` package handles chunk-to-message accumulation on the frontend, avoiding a custom 780-line accumulator. ## Key files **Backend:** - `agent-chat-event-publisher.service.ts` — publishes events to Redis PubSub - `agent-chat-subscription.resolver.ts` — GraphQL subscription resolver - `stream-agent-chat.job.ts` — publishes chunks via PubSub instead of resumable-stream - `agent-chat.controller.ts` — unified `POST /:threadId/message` endpoint **Frontend:** - `useAgentChatSubscription.ts` — subscribes to `onAgentChatEvent`, bridges to `readUIMessageStream` - `useAgentChat.ts` — send/stop/optimistic rendering (no more AI SDK) - `AgentChatStreamSubscriptionEffect.tsx` — replaces `AgentChatAiSdkStreamEffect.tsx` ## Test plan - [ ] Send message on new thread → optimistic render, streaming response appears - [ ] Send message while streaming → queued instantly (no flash in main thread) - [ ] Queued message auto-flushes after current stream completes - [ ] Remove queued message via queue UI - [ ] Stop streaming mid-response - [ ] Leave chat idle for several minutes → streaming still works after (SSE client recycling) - [ ] Token refresh during session → requests succeed (authenticated fetch) - [ ] Switch threads while streaming → clean subscription handoff Made with [Cursor](https://cursor.com) --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
The #1 Open-Source CRM
🌐 Website · 📚 Documentation · 
Roadmap · 
Discord · 
Figma
Installation
See: 🚀 Self-hosting 🖥️ Local Setup
Why Twenty
We built Twenty for three reasons:
CRMs are too expensive, and users are trapped. Companies use locked-in customer data to hike prices. It shouldn't be that way.
A fresh start is required to build a better experience. We can learn from past mistakes and craft a cohesive experience inspired by new UX patterns from tools like Notion, Airtable or Linear.
We believe in open-source and community. Hundreds of developers are already building Twenty together. Once we have plugin capabilities, a whole ecosystem will grow around it.
What You Can Do With Twenty
Please feel free to flag any specific needs you have by creating an issue.
Below are a few features we have implemented to date:
- Personalize layouts with filters, sort, group by, kanban and table views
- Customize your objects and fields
- Create and manage permissions with custom roles
- Automate workflow with triggers and actions
- Emails, calendar events, files, and more
Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
Stack
- TypeScript
- Nx
- NestJS, with BullMQ, PostgreSQL, Redis
- React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for UI testing (Chromatic), code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
Join the Community
- Star the repo
- Subscribe to releases (watch -> custom -> releases)
- Follow us on Twitter or LinkedIn
- Join our Discord
- Improve translations on Crowdin
- Contributions are, of course, most welcome!