serena

serena is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from rjmurillo/ai-agents. Its token cost is not measured, scanned A, original, MIT.

A local project server that gives an AI coding assistant tools for understanding and working with a codebase. It is configured to run against the current repository.

In plain words
What is it for?
It helps initialize a project, retrieve stored knowledge, and support code exploration and repository tasks.
Why use it?
It provides project-aware access to the repository so the assistant can inspect and update code with its surrounding context.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Written for no agent in particular: it speaks MCP, so any client can run it. Also seen: listed in a Claude config.

One of 3 entries in .mcp.json — they are configured in one file and arrive together.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/rjmurillo/ai-agents/serena
Clone the repo
git clone --depth 1 https://github.com/rjmurillo/ai-agents

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for serena

README.md
[![agentmods](https://agentmods.dev/badge/mcp/rjmurillo/ai-agents/serena.svg)](https://agentmods.dev/mcp/rjmurillo/ai-agents/serena)
Your own site
<a href="https://agentmods.dev/mcp/rjmurillo/ai-agents/serena"><img src="https://agentmods.dev/badge/mcp/rjmurillo/ai-agents/serena.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

serena scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.mcp.json · 18 lines

What it actually says

{
  "serena": {
    "type": "stdio",
    "command": "uvx",
    "args": [
      "--from",
      "git+https://github.com/oraios/serena",
      "serena",
      "start-mcp-server",
      "--project",
      "${workspaceFolder:-.}",
      "--context",
      "claude-code",
      "--port",
      "24282"
    ]
  }
}
Same file

What else .mcp.json configures

This page is one entry in a file that holds 3. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 18 lines scan A df60941495e8

Subscribe to this mod's changes

serena is an MCP server published in the GitHub repository rjmurillo/ai-agents (45 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.