MiroThinker is a deep research agent framework designed for complex, multi-step tasks requiring external tool use. The system orchestrates LLM reasoning with a modular suite of MCP (Model Context Protocol) tools including web search, code execution, vision, audio, and reasoning capabilities. It features sophisticated context management through failure experience summarization and sliding window truncation to handle long conversations. The agent iteratively generates tool calls, executes them via MCP servers, and integrates results until producing a final answer. The repository includes benchmark evaluation scripts for GAIA, BrowseComp, HLE, and other research benchmarks, trace collection utilities for model improvement, and a Gradio demo for interactive use. Architecture centers on an orchestrator managing the agent loop, a pipeline for step execution, tool executors handling MCP server interactions, and LLM abstractions supporting Anthropic and OpenAI APIs with prompt caching.