Open Agent Sdk Rust

Open Agent SDK (Rust)

A lightweight, open-source Rust SDK for building AI agents. Run the full agent loop in-process — no CLI or subprocess required. Deploy anywhere: cloud, serverless, Docker, CI/CD.

Also available in [TypeScript](https://github.com/codeany-ai/open-agent-sdk-typescript) and [Go](https://github.com/codeany-ai/open-agent-sdk-go).

Features

• Multi-Provider — Supports both Anthropic Messages API and OpenAI Chat Completions API, with auto-detection by model name
• Agent Loop — Streaming agentic loop with tool execution, multi-turn conversations, and cost tracking
• 25+ Built-in Tools — Bash, Read, Write, Edit, Glob, Grep, WebFetch, WebSearch, Agent (subagents), AskUser, Tasks, Teams, Plans, Worktrees, Todos, Cron, LSP, Config, MCP Resources, ToolSearch
• Session Persistence — Save, load, fork, and resume conversations across sessions
• MCP Support — Connect to MCP servers via stdio, HTTP, and SSE transports
• Permission System — Configurable tool approval with allow/deny rules and filesystem path validation
• Hook System — 20+ hook events: PreToolUse, PostToolUse, SessionStart/End, SubagentStart/Stop, TaskCreated/Completed, FileChanged, PreCompact/PostCompact, and more
• Extended Thinking — Support for extended thinking with budget tokens
• Cost Tracking — Per-model token usage and pricing for Anthropic, OpenAI, and DeepSeek models
• Custom Tools — Implement the Tool trait to add your own tools
• Auto-Compaction — Multi-tier context compression (micro-compact, LLM summarization, image stripping)
• Sandbox Config — Network and filesystem restrictions for tool execution
• File State Cache — LRU cache for file state tracking and staleness detection

Quick Start

[dependencies]
open-agent-sdk = "0.1.0"
tokio = { version = "1", features = ["full"] }

use open_agent_sdk::{Agent, AgentOptions, SDKMessage};
use open_agent_sdk::types;

#[tokio::main]
async fn main() {
    let m