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Open source · Python

Best Python coding agents

The open-source coding agents written in Python, from the Agent Search Engine index — ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. Every project here is Python-first, self-hostable, and free to run; the trade-off is you host and maintain it yourself. Right now it's led by Skill_Seekers (15k stars), with openevolve and semble close behind. Rankings shift as projects gain stars and ship commits.

10 open-source records · all coding agents · more best-of lists · how we rank

Skill_SeekersSDK / libraryConvert documentation websites, GitHub repositories, and PDFs into Claude AI skills with automatic conflict detectionPython · 15k stars · MIT · Aug 2026openevolveAgentOpen-source implementation of AlphaEvolvePython · 7.2k stars · Apache-2.0 · Jul 2026sembleSDK / libraryFast and Accurate Code Search for Agents. Uses ~98% fewer tokens than grep+readPython · 5.9k stars · MIT · Aug 2026agents-cliAgentThe CLI and skills that turn any coding assistant into an expert at creating, evaluating, and deploying AI agents on Google Cloud.Python · 5.6k stars · Apache-2.0 · Aug 2026claude_codex_bridgeAgentVisible multi-agent CLI workspace for mixing Codex, Claude, Gemini, Kimi, Qwen, Cursor, Copilot, Pi, OpenCode, and other AI coding agentsPython · 3.4k stars · Aug 2026teaql-agent-kitSDK / libraryDeterministic execution for non-deterministic AI.Python · 2.8k stars · MIT · Aug 2026cocoindex-codeSDK / libraryA super light-weight embedded code search engine CLI (AST based) that just works - saves 70% token and improves speed for coding agent Star if you like it!Python · 2.7k stars · Apache-2.0 · Aug 2026CoreCoderAgentMinimal AI coding agent (~1,000 lines of Python) inspired by Claude Code. Works with any LLM. Think NanoGPT for coding agents. Formerly NanoCoder.Python · 1.7k stars · MIT · Aug 2026spec_driven_developAgentSpec-driven development workflow for AI coding agents: architecture-first planning, task decomposition, GitHub Issue/PR tracking, Deep Discuss, and adaptive control for Claude Code, Codex, Cursor,Python · 967 stars · MIT · Jul 2026openyakAgentOpen-source local-first AI agent for desktop work. No account, no telemetry: use local models with Ollama/Rapid-MLX or bring your own provider key.Python · 693 stars · Apache-2.0 · Aug 2026

Frequently asked

What are the best Python coding agents?
The Python projects listed below, ranked by maintained adoption — GitHub stars plus recent commit activity — so you see what's genuinely used and still maintained, not abandoned.
Are these Python coding agents open source and free?
Yes — every project on this page is open source and written primarily in Python. The software is free to run and self-host; you still pay for the infrastructure you run it on and any model or API usage it makes.
Why choose Python coding agents specifically?
Staying in your team's primary language — Python — makes self-hosting, extending, and debugging far easier, because you can read and modify the source directly instead of treating it as a black box.