Claudian is an Obsidian plugin that embeds AI coding agents as collaborators within your note vault.
The plugin solves the problem of integrating AI-assisted coding workflows into your existing note-taking environment. It works by connecting your Obsidian vault to coding agents like Claude Code, Codex, Grok, Opencode, and Pi, allowing these agents to read, write, edit, and search files directly within the vault as if it were their working directory. You interact through a chat sidebar, select text for inline editing with word-level diff preview, and use slash commands and @mentions to reference files and external tools. The plugin supports multi-step workflows including a Plan Mode where agents design solutions before implementation, custom instruction modes, and integration with MCP servers for connecting external tools.
Claudian suits developers who work in Obsidian and want to leverage AI coding agents without leaving their vault. It works best for projects where your notes and code live together, or where you want AI assistance integrated into your existing knowledge management system. The plugin requires at least one compatible coding agent harness installed locally or accessible through an API provider, and runs on desktop platforms only. If you already use Claude Code, Codex, or similar agents, this plugin brings that familiar interface into Obsidian rather than requiring you to switch between applications.
The project shows active development with regular feature additions including experimental collaboration mode for shared projects, support for multiple agent types, and ongoing expansion of integrations. The codebase is maintained in TypeScript and the plugin is distributed through Obsidian's community plugin system, indicating ongoing compatibility work with the Obsidian platform.
