Otōto is an MCP server for coding agents — Claude Code, OpenCode, or anything else that speaks MCP — that acts as your agent's little brother. When your agent needs to understand a codebase, Otōto offloads the heavy reading to a small model running on your own infrastructure. It explores your files, finds the relevant logic, and returns concise answers backed by verified source citations, so a question about failure handling comes back with the relevant lines and file positions rather than a paraphrase. It installs on macOS Apple silicon and Linux.
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Run the installer on macOS Apple silicon or Linux and connect it over MCP.
Let your main agent delegate a question and get back a short answer with cited lines.
The exploration runs on a small model, so the reading does not spend your main model's tokens.
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