The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Siyuan
An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间，让人与智能体在此协作
Install
$
git clone https://github.com/siyuan-note/siyuanInstall command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →From thought to insight, with agents
English | 中文 | 日本語 | Türkçe
Table of Contents
- 💡 Introduction
- 🔮 Features
- 🏗️ Architecture and Ecosystem
- 🗺️ Roadmap
- 🚀 Download Setup
- ⌨️ Command-line Interface
- 🏘️ Community
- 🛠️ Development Guide
- ❓ FAQ
- How does SiYuan store data?
- Does it support data synchronization through a third-party sync disk?
- Is SiYuan open source?
- How to upgrade to a new version?
- What if some blocks (such as paragraph blocks in list items) cannot find the block icon?
- What should I do if the data repo key is lost?
- Do I need to pay for it?
- 🙏 Acknowledgement
💡 Introduction
SiYuan is a privacy-first personal knowledge management system, supporting fine-grained block-level reference and Markdown WYSIWYG.
To learn more, read the online user guide or join the SiYuan English Discussion Forum.
🔮 Features
Most features are free, even for commercial use.
- Content block
- Block-level reference and two-way links
- Custom attributes
- SQL query embed
- Protocol
siyuan://
- Editor
- Block-style
- Markdown WYSIWYG
- List outline
- Block zoom-in
- Million-word large document editing
- Mathematical formulas, charts, flowcharts, Gantt charts, timing charts, staves, etc.
- Web clipping
- PDF Annotation link
- Export
- Block ref and embed
- Standard Markdown with assets
- PDF, Word and HTML
- Copy to WeChat MP, Zhihu and Yuque
- Database
- Table view
- Flashcard spaced repetition
- AI writing and Q/A chat via OpenAI API
- Tesseract OCR
- Multi-tab, drag and drop to split screen
- Template snippet
- JavaScript/CSS snippet
- Android/iOS/HarmonyOS App
- Docker deployment
- API
- Community marketplace
Some features are only available to paid members, for more details please refer to Pricing.
🏗️ Architecture and Ecosystem
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