## What changed This refactor fixes AI chat error surfacing by aligning both the backend and frontend with the existing GraphQL error architecture instead of adding AI-local error translation. On the backend: - add a dedicated GraphQL billing exception path - register billing GraphQL handling globally for GraphQL requests - reuse the existing AI GraphQL interceptor path for agent/chat exceptions - keep billing status classification shared between REST and GraphQL - remove the earlier attempt to preserve `CustomException` metadata in the global GraphQL fallback On the frontend: - keep the original Apollo GraphQL error object in AI chat state - reuse shared Apollo/GraphQL helpers for user-facing messages and error-type checks - delete AI-specific error extraction helpers that duplicated generic GraphQL parsing - replace a few direct `extensions.subCode` call sites with a shared predicate ## Why it changed The original bug was that `BillingException` and AI exceptions thrown from chat were not being translated into GraphQL errors with the expected `extensions.subCode` and `extensions.userFriendlyMessage`, so the AI chat UI had nothing structured to inspect. An intermediate fix worked mechanically but pushed `CustomException` handling into the global GraphQL fallback, which blurred the intended layering. This PR moves the behavior back to explicit GraphQL edges. ## Root cause `AgentChatResolver` could throw `BillingException` and `AgentException`, but: - billing had a REST exception filter and no shared GraphQL equivalent - AI chat was not consistently using the same GraphQL exception translation path as the sibling AI resolver - the frontend chat UI had drifted into AI-specific error parsing instead of consuming the same structured Apollo errors as the rest of the app ## Impact - `BILLING_CREDITS_EXHAUSTED` is now preserved through GraphQL and can render the existing credits-exhausted UI in chat - `API_KEY_NOT_CONFIGURED` is preserved through the AI GraphQL path - AI chat now follows the same general GraphQL error consumption pattern as the rest of the frontend - billing GraphQL handling is less dependent on individual resolver authors remembering to add a filter ## Validation - `yarn jest --config packages/twenty-server/jest.config.mjs packages/twenty-server/src/engine/core-modules/billing/utils/__tests__/billing-graphql-api-exception-handler.util.spec.ts packages/twenty-server/src/engine/metadata-modules/ai/ai-agent/utils/__tests__/agent-graphql-api-exception-handler.util.spec.ts` - `yarn jest --config packages/twenty-front/jest.config.mjs packages/twenty-front/src/utils/__tests__/is-graphql-error-of-type.util.test.ts` - `npx oxlint --type-aware ...` on touched backend/frontend files - `npx prettier --check ...` on touched backend/frontend files ## Follow-up ideas - consolidate frontend GraphQL error helpers further so more existing direct `extensions.subCode` checks move to shared utilities - consider whether common GraphQL exception filter registration should live in a more explicit GraphQL-specific module instead of `CoreEngineModule` - add an end-to-end test for a real `sendChatMessage` GraphQL failure path in AI chat --------- 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!




