Chimera

Build, compose, and deploy coding agents from modular primitives.
Compose any coding agent architecture in Python.

What is Chimera?

An open-source Python framework for building coding agents. Pick your provider, pick your tools, pick your loop. Chimera wires them together. Recreate SWE-Agent, Aider, Cline, or Codex in a few lines, or design something entirely new.

import chimera

# One-liner: synthesize code from a spec
result = chimera.synthesize(
    spec="Implement a fibonacci function",
    tests="python -m pytest tests/",
)

# Or build a custom agent (canonical, fully-assembled stack)
from chimera.assembly.coding_agent import CodingAgent

agent = CodingAgent.from_preset("swebench")
async for event in agent.run("Fix the authentication bug"):
    print(event)

Key Features

8-Layer Stack

CLI, Workflows, Synthesis, Eval, Agent, Provider, Infrastructure, Environment. Each layer usable independently.

Any Agent Architecture

Presets for SWE-Agent, Aider, Cline, and Codex. Mix and match loops, tools, and strategies.

20+ Tools

Read, write, edit, bash, search, git, browser, web search, semantic search, and more.

6 Providers

Anthropic, OpenAI, Google, Ollama, Modal, and any OpenAI-compatible endpoint.

Quick Links

Getting Started Install Chimera and run your first agent in 5 minutes.

Build a Coding Agent Compose tools, loops, and strategies into a custom agent.

Architecture Understand the 8-layer stack and how modules compose.

API Reference Complete API reference for all modules.