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Pocket Flow is a 100-line minimalist LLM framework
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Lightweight: Just 100 lines. Zero bloat, zero dependencies, zero vendor lock-in.
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Expressive: Everything you love—(Multi-)Agents, Workflow, RAG, and more.
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Agentic Coding: Let AI Agents (e.g., Cursor AI) build Agents—10x productivity boost!
Get started with Pocket Flow:
- To install,
pip install pocketflowor just copy the source code (only 100 lines). - To learn more, check out the documentation. To learn the motivation, read the story.
- Have questions? Check out this AI Assistant, or create an issue!
- 🎉 Join our Discord to connect with other developers building with Pocket Flow!
- 🎉 Pocket Flow is initially Python, but we now have Typescript, Java, C++ and Go versions!
Current LLM frameworks are bloated... You only need 100 lines for LLM Framework!
| Abstraction | App-Specific Wrappers | Vendor-Specific Wrappers | Lines | Size | |
|---|---|---|---|---|---|
| LangChain | Agent, Chain | Many (e.g., QA, Summarization) |
Many (e.g., OpenAI, Pinecone, etc.) |
405K | +166MB |
| CrewAI | Agent, Chain | Many (e.g., FileReadTool, SerperDevTool) |
Many (e.g., OpenAI, Anthropic, Pinecone, etc.) |
18K | +173MB |
| SmolAgent | Agent | Some (e.g., CodeAgent, VisitWebTool) |
Some (e.g., DuckDuckGo, Hugging Face, etc.) |
8K | +198MB |
| LangGraph | Agent, Graph | Some (e.g., Semantic Search) |
Some (e.g., PostgresStore, SqliteSaver, etc.) |
37K | +51MB |
| AutoGen | Agent | Some (e.g., Tool Agent, Chat Agent) |
Many [Optional] (e.g., OpenAI, Pinecone, etc.) |
7K (core-only) |
+26MB (core-only) |
| PocketFlow | Graph | None | None | 100 | +56KB |
The 100 lines capture the core abstraction of LLM frameworks: Graph!
From there, it's easy to implement popular design patterns like (Multi-)Agents, Workflow, RAG, etc.
✨ Below are basic tutorials:
| Name | Difficulty | Description |
|---|---|---|
| Chat | ☆☆☆ Dummy |
A basic chat bot with conversation history |
| Structured Output | ☆☆☆ Dummy |
Extracting structured data from resumes by prompting |
| Workflow | ☆☆☆ Dummy |
A writing workflow that outlines, writes content, and applies styling |
| Agent | ☆☆☆ Dummy |
A research agent that can search the web and answer questions |
| RAG | ☆☆☆ Dummy |
A simple Retrieval-augmented Generation process |
| Batch | ☆☆☆ Dummy |
A batch processor that translates markdown content into multiple languages |
| Streaming | ☆☆☆ Dummy |
A real-time LLM streaming demo with user interrupt capability |
| Chat Guardrail | ☆☆☆ Dummy |
A travel advisor chatbot that only processes travel-related queries |
| Map-Reduce | ★☆☆ Beginner |
A resume qualification processor using map-reduce pattern for batch evaluation |
| Multi-Agent | ★☆☆ Beginner |
A Taboo word game for asynchronous communication between two agents |
| Supervisor | ★☆☆ Beginner |
Research agent is getting unreliable... Let's build a supervision process |
| Parallel | ★☆☆ Beginner |
A parallel execution demo that shows 3x speedup |
| Parallel Flow | ★☆☆ Beginner |
A parallel image processing demo showing 8x speedup with multiple filters |
| Majority Vote | ★☆☆ Beginner |
Improve reasoning accuracy by aggregating multiple solution attempts |
| Thinking | ★☆☆ Beginner |
Solve complex reasoning problems through Chain-of-Thought |
| Memory | ★☆☆ Beginner |
A chat bot with short-term and long-term memory |
| MCP | ★☆☆ Beginner |
Agent using Model Context Protocol for numerical operations |
| Web HITL | ★☆☆ Beginner |
A minimal web service for a human review loop with SSE updates |
👀 Want to see other tutorials for dummies? Create an issue!
🚀 Through Agentic Coding—the fastest LLM App development paradigm-where humans design and agents code!
✨ Below are examples of more complex LLM Apps:
| App Name | Difficulty | Topics | Human Design | Agent Code |
|---|---|---|---|---|
| Build Cursor with Cursor We'll reach the singularity soon ... |
★★★ Advanced |
Agent | Design Doc | Flow Code |
| Codebase Knowledge Builder Life's too short to stare at others' code in confusion |
★★☆ Medium |
Workflow | Design Doc | Flow Code |
| Ask AI Paul Graham Ask AI Paul Graham, in case you don't get in |
★★☆ Medium |
RAG Map Reduce TTS |
Design Doc | Flow Code |
| Youtube Summarizer Explain YouTube Videos to you like you're 5 |
★☆☆ Beginner |
Map Reduce | Design Doc | Flow Code |
| Cold Opener Generator Instant icebreakers that turn cold leads hot |
★☆☆ Beginner |
Map Reduce Web Search |
Design Doc | Flow Code |
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Want to learn Agentic Coding?
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Check out my YouTube for video tutorial on how some apps above are made!
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Want to build your own LLM App? Read this post! Start with this template!
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