Serena
Coding toolkit that gives agents IDE-like semantic retrieval and symbol-level editing via language servers.
How to use it
Add it as an MCP server in your client (e.g. claude mcp add in Claude Code, ~/.codex/config.toml for Codex, or .cursor/mcp.json in Cursor). Follow the install command and auth steps in the project’s README; they change often, so we link instead of copying them.
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Reference server from the MCP maintainers that gives an agent read/write access to directories you explicitly allow, with configurable roots.