mirror of https://gitee.com/wanwujie/deer-flow synced 2026-04-02 22:02:13 +08:00

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Ryanba f737fbeae8 fix(frontend): block duplicate sends during uploads (#1165 )

* fix(frontend): block duplicate sends during uploads

Expose pre-submit upload work as a busy state so the chat input does not allow a second send while the first attachment is still uploading.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* docs(frontend): document upload and stream ownership

Record that thread hooks own upload-before-submit state while the chat page owns composer busy wiring, so future changes do not reintroduce duplicate socket or upload state handling.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix(frontend): separate upload busy state from streaming

Keep uploads from reusing the streaming stop state so duplicate submits are blocked without turning the composer into a stop button during file uploads.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

---------

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

2026-03-18 15:10:27 +08:00

5.7 KiB

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Agents Architecture

Overview

DeerFlow is built on a sophisticated agent-based architecture using the LangGraph SDK to enable intelligent, stateful AI interactions. This document outlines the agent system architecture, patterns, and best practices for working with agents in the frontend application.

Architecture Overview

Core Components

┌────────────────────────────────────────────────────────┐
│                    Frontend (Next.js)                  │
├────────────────────────────────────────────────────────┤
│  ┌──────────────┐    ┌──────────────┐    ┌──────────┐  │
│  │ UI Components│───▶│ Thread Hooks │───▶│ LangGraph│  │
│  │              │    │              │    │   SDK    │  │
│  └──────────────┘    └──────────────┘    └──────────┘  │
│         │                    │                  │      │
│         │                    ▼                  │      │
│         │            ┌──────────────┐           │      │
│         └───────────▶│ Thread State │◀──────────┘      │
│                      │  Management  │                  │
│                      └──────────────┘                  │
└────────────────────────────────────────────────────────┘
                              │
                              ▼
┌────────────────────────────────────────────────────────┐
│              LangGraph Backend (lead_agent)            │
│  ┌────────────┐  ┌──────────┐  ┌───────────────────┐   │
│  │Main Agent  │─▶│Sub-Agents│─▶│  Tools & Skills   │   │
│  └────────────┘  └──────────┘  └───────────────────┘   │
└────────────────────────────────────────────────────────┘

Project Structure

src/
├── app/                    # Next.js App Router pages
│   ├── api/                # API routes
│   ├── workspace/          # Main workspace pages
│   └── mock/               # Mock/demo pages
├── components/             # React components
│   ├── ui/                 # Reusable UI components
│   ├── workspace/          # Workspace-specific components
│   ├── landing/            # Landing page components
│   └── ai-elements/        # AI-related UI elements
├── core/                   # Core business logic
│   ├── api/                # API client & data fetching
│   ├── artifacts/          # Artifact management
│   ├── config/              # App configuration
│   ├── i18n/               # Internationalization
│   ├── mcp/                # MCP integration
│   ├── messages/           # Message handling
│   ├── models/             # Data models & types
│   ├── settings/           # User settings
│   ├── skills/             # Skills system
│   ├── threads/            # Thread management
│   ├── todos/              # Todo system
│   └── utils/              # Utility functions
├── hooks/                  # Custom React hooks
├── lib/                    # Shared libraries & utilities
├── server/                 # Server-side code (Not available yet)
│   └── better-auth/        # Authentication setup (Not available yet)
└── styles/                 # Global styles

Technology Stack

LangGraph SDK (@langchain/langgraph-sdk@1.5.3) - Agent orchestration and streaming
LangChain Core (@langchain/core@1.1.15) - Fundamental AI building blocks
TanStack Query (@tanstack/react-query@5.90.17) - Server state management
React Hooks - Thread lifecycle and state management
Shadcn UI - UI components
MagicUI - Magic UI components
React Bits - React bits components

Interaction Ownership

src/app/workspace/chats/[thread_id]/page.tsx owns composer busy-state wiring.
src/core/threads/hooks.ts owns pre-submit upload state and thread submission.
src/hooks/usePoseStream.ts is a passive store selector; global WebSocket lifecycle stays in App.tsx.

Resources

Contributing

When adding new agent features:

Follow the established project structure
Add comprehensive TypeScript types
Implement proper error handling
Write tests for new functionality
Update this documentation
Follow the code style guide (ESLint + Prettier)

License

This agent architecture is part of the DeerFlow project.

5.7 KiB Raw Blame History