Claudian
A third-party open-source plugin for Obsidian that connects AI agents to a local knowledge base. It supports multiple agent runtimes, including Codex and Claude Code, and can retrieve, read, and write notes.
Timeline (last 90 days)
Obsidian itself is free, and the Claudian plugin is open source and free.
The Claudian plugin only supports desktop Obsidian; on mobile you can manually query the knowledge base, but you cannot use the AI capabilities.
Claudian does not talk to the model directly; instead it drives an Agent, which decides when to retrieve, which notes to read, and whether files need to be written or modified.
Codex, Claude Code, DeepSeek Harness, and Grok Build are all Agent runtimes that can be invoked by the Claudian plugin.
Obsidian's Restricted Mode disables the permission for third-party plugins to run by default, and you need to turn off Restricted Mode to install and enable Claudian from the community marketplace.
In the hands-on test, the AI calculated from the materials of a 12-person book club a total cost of 300 yuan, 25 yuan per person, and 60 yuan remaining in the budget.
In the second round of update testing, after the number of people was changed from 12 to 16 and the start time was postponed by half an hour, the AI modified two files and kept a change history, and a new session queried a total cost of 320 yuan, 20 yuan per person, and a start time of 2:30 PM.
All Facts (7)
Obsidian itself is free, and the Claudian plugin is open source and free.
50%UnverifiedThe Claudian plugin only supports desktop Obsidian; on mobile you can manually query the knowledge base, but you cannot use the AI capabilities.
50%UnverifiedClaudian does not talk to the model directly; instead it drives an Agent, which decides when to retrieve, which notes to read, and whether files need to be written or modified.
50%UnverifiedCodex, Claude Code, DeepSeek Harness, and Grok Build are all Agent runtimes that can be invoked by the Claudian plugin.
50%UnverifiedObsidian's Restricted Mode disables the permission for third-party plugins to run by default, and you need to turn off Restricted Mode to install and enable Claudian from the community marketplace.
50%UnverifiedIn the hands-on test, the AI calculated from the materials of a 12-person book club a total cost of 300 yuan, 25 yuan per person, and 60 yuan remaining in the budget.
50%UnverifiedIn the second round of update testing, after the number of people was changed from 12 to 16 and the start time was postponed by half an hour, the AI modified two files and kept a change history, and a new session queried a total cost of 320 yuan, 20 yuan per person, and a start time of 2:30 PM.
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