https://github.com/microsoft/SkillOpt
SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.
https://github.com/microsoft/SkillOpt
agent-skills self-evolving-agents
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SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.
- Host: GitHub
- URL: https://github.com/microsoft/SkillOpt
- Owner: microsoft
- License: mit
- Created: 2026-05-08T06:41:01.000Z (about 1 month ago)
- Default Branch: main
- Last Pushed: 2026-06-15T17:12:43.000Z (4 days ago)
- Last Synced: 2026-06-15T19:15:12.198Z (4 days ago)
- Topics: agent-skills, self-evolving-agents
- Language: Python
- Homepage: https://aka.ms/skillopt
- Size: 21.6 MB
- Stars: 7,160
- Watchers: 36
- Forks: 683
- Open Issues: 16
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Security: SECURITY.md
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README
# SkillOpt: Executive Strategy for Self-Evolving Agent Skills
*Train agent skills like you train neural networks — with epochs, (mini-)batchsize, learning rates, and validation gates — but without touching model weights.*
[](https://microsoft.github.io/SkillOpt/) [](https://arxiv.org/abs/2605.23904) [](https://youtu.be/JUBMDTCiM0M) [](https://pypi.org/project/skillopt/) [](https://www.python.org/) [](LICENSE)
> 📖 **For installation, data preparation, training/eval commands, the full configuration reference, and framework internals, see the [Documentation & Reproduction Guide](https://microsoft.github.io/SkillOpt/docs/guideline.html)** (rendered on GitHub Pages).
---
## News 🔥🔥🔥
- **[2026-06-15]** 😴 **SkillOpt-Sleep (preview)** — a nightly offline self-evolution companion for local coding agents (Claude Code / Codex / Copilot): review past sessions, replay recurring tasks, and consolidate validated skills behind a held-out gate. See **[`docs/sleep/README.md`](docs/sleep/README.md)** for what it is, how to use it, and results.
- **[2026-06-03]** 🎉 **[gbrain](https://github.com/garrytan/gbrain), [gbrain-evals](https://github.com/garrytan/gbrain-evals/blob/main/docs/benchmarks/2026-06-03-skillopt.md), and [darwin-skill](https://github.com/alchaincyf/darwin-skill) have all integrated SkillOpt.**
- **[2026-06-02]** 🎉 **SkillOpt [v0.1.0](https://github.com/microsoft/SkillOpt/releases/tag/v0.1.0) is now available on [PyPI](https://pypi.org/project/skillopt/)!** Install with `pip install skillopt`. This initial release includes the full training loop (rollout → reflect → aggregate → select → update → evaluate), multi-backend support (OpenAI / Azure / Claude / Qwen / MiniMax), six built-in benchmarks, and WebUI dashboard.
---
## Overview
Modern agent skills are usually hand-crafted, generated one-shot by a strong
LLM, or evolved through loosely controlled self-revision — none of which
behaves like a deep-learning optimizer for the skill itself, and none of
which reliably improves over its starting point under feedback.
**SkillOpt treats the skill document as the trainable state of a frozen
agent**, and trains it with the discipline that makes weight-space
optimization reproducible. A separate optimizer model turns scored rollouts
into bounded add / delete / replace edits on a single skill document; a
candidate edit is accepted only when it strictly improves a held-out
validation score. A textual learning-rate budget, a rejected-edit buffer,
and an epoch-wise slow / meta update make skill training stable while
adding **zero inference-time model calls** at deployment.
The deployed artifact is a compact `best_skill.md` (typically 300–2,000
tokens) that runs against the unchanged target model. Across **six
benchmarks, seven target models, and three execution harnesses** (direct
chat, Codex CLI, Claude Code CLI), SkillOpt is best or tied-best on **all
52 evaluated (model, benchmark, harness) cells** and on GPT-5.5 lifts the
average no-skill accuracy by **+23.5 points in direct chat, +24.8 inside
the Codex agentic loop, and +19.1 inside Claude Code**. Optimized skill
artifacts transfer across model scales, between Codex and Claude Code
harnesses, and to nearby benchmarks without further optimization.
For the full method, ablations, and per-cell results see the [paper](https://arxiv.org/abs/2605.23904); for a visual walkthrough of the loop see the [project page](https://microsoft.github.io/SkillOpt/); for deeper API / backend / benchmark docs see [`docs/`](docs/).
## 🎬 Demo Video
https://github.com/user-attachments/assets/eb12d3bc-371c-467f-904d-91b61f339ed7
▶ Watch the full demo on YouTube
---
## Extensibility & WebUI
### Adding a new backend
A backend = a chat / exec target (e.g. `openai_chat`, `claude_chat`,
`qwen_chat`, `minimax_chat`, `codex_exec`, `claude_code_exec`). See
[`docs/guide/new-backend.md`](docs/guide/new-backend.md) for the full
contract; in short you add a `skillopt/model/_backend.py` module,
register it in `skillopt/model/common.py` + `backend_config.py`, and wire
it through the router in `skillopt/model/__init__.py`. `qwen_backend.py`
and `minimax_backend.py` are good templates.
### Adding a new benchmark
A benchmark = a `skillopt/envs//` package with a `dataloader.py`, a
`rollout.py`, and an `initial.md` seed skill. See
[`docs/guide/new-benchmark.md`](docs/guide/new-benchmark.md) for the full
contract; the simplest reference is `skillopt/envs/searchqa/`.
### WebUI
Launch the monitoring dashboard (optional):
```bash
pip install -e ".[webui]"
python -m skillopt_webui.app
```
| Flag | Default | Description |
|---|---|---|
| `--port` | 7860 | Server port |
| `--host` | `0.0.0.0` | Bind address |
| `--share` | off | Create a public Gradio share link |
---
## Citation
```bibtex
@misc{yang2026skilloptexecutivestrategyselfevolving,
title={SkillOpt: Executive Strategy for Self-Evolving Agent Skills},
author={Yifan Yang and Ziyang Gong and Weiquan Huang and Qihao Yang and Ziwei Zhou and Zisu Huang and Yan Li and Xuemei Gao and Qi Dai and Bei Liu and Kai Qiu and Yuqing Yang and Dongdong Chen and Xue Yang and Chong Luo},
year={2026},
eprint={2605.23904},
archivePrefix={arXiv},
primaryClass={cs.AI},
url={https://arxiv.org/abs/2605.23904}
}
```