Obsidian Plugin Adds DuckDB SQL for Agent-Readable Data Notebooks

A new open-source plugin brings DuckDB SQL into Obsidian via WASM, allowing users to write queries in markdown blocks, run them locally or against cloud MotherDuck databases, and freeze results as plain markdown tables. Because the output is just markdown, AI agents can read cached data directly from notes without expensive LLM tool calls or MCP round-trips. The plugin also exposes an API through Obsidian's new official CLI, enabling agents like Claude Code or Codex to refresh stale tables on demand or on a schedule. The result turns an Obsidian vault into a self-contained, agent-readable knowledge base that works offline, diffs cleanly in git, and runs on mobile.