Frontend Query & Mutation

Intent

• Keep API hooks in controllers/API/queries/{domain}/ as the organized source of truth.
• Use UseRequestProcessor for consistent retry, invalidation, and error handling.
• Use Axios api instance for all HTTP calls (never raw fetch for REST).
• Use performStreamingRequest() for streaming operations (build, chat).
• Keep cache invalidation in mutation onSettled callbacks.

Architecture Overview

Langflow uses Axios + TanStack React Query v5 for data fetching. There is no oRPC or contract layer. The architecture is: