Serena is an MCP server that gives coding agents IDE-like access to source code through symbols and relationships, including retrieval, editing, refactoring, and debugging. It is intended for AI agents working in codebases, especially when they need structured code-level operations.
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.
npx agentmods add instructions/oraios/serena/claude-mdgit clone --depth 1 https://github.com/oraios/serenaWrote 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.
[](https://agentmods.dev/instructions/oraios/serena/claude-md)<a href="https://agentmods.dev/instructions/oraios/serena/claude-md"><img src="https://agentmods.dev/badge/instructions/oraios/serena/claude-md.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00050 | $0.00050 |
| Opus 5 | $0.00025 | $0.00025 |
| Sonnet 5 | $0.00010 | $0.00010 |
| Haiku 4.5 | $0.00005 | $0.00005 |
Grade A, and why
serena CLAUDE.md 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 6d 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.
This is a copy
100% identical to serena AGENTS.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Relevant information about the project is in .serena/memories. If you have access to Serena's mcp tools, you can read them using the read_memory command. Otherwise you can just read them using normal file reading tools.
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.
- 6d ago First seen · 4 lines · 50 tokens per session scan A e575ccbb1433
serena CLAUDE.md is an instructions file published in the GitHub repository oraios/serena (28,828 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to serena AGENTS.md, differing in 0 lines, and is treated as a copy.
Other instructions, from other repositories
memorix CLAUDE.md
Claude Code instructions for AVIDS2/memorix, covering memorix - agent instructions for claude code, using memorix memory tools, when to search memory, when to store memory and when to resolve memory.
memorix GEMINI.md
Gemini CLI instructions for AVIDS2/memorix, covering memorix - cross-agent memory rules, session start - bind project, then load context, during session - capture important context, architecture & decisions and bug fixes & problem solving.
memstack CLAUDE.md
Claude Code instructions for cwinvestments/memstack, covering memstack™ skill loader, always call findskill before, always call listskills when, do not call findskill for and priority.
tree-sitter-analyzer CLAUDE.md
Claude Code instructions for aimasteracc/tree-sitter-analyzer, covering ruflo — claude code configuration, rules, test quality rules — locked (2026-06-28), t-1: no new test files for existing plugins (blocker) and t-2: no weak assertions — ratchet-enforced (blocker).
tree-sitter-analyzer AGENTS.md
AGENTS.md instructions for aimasteracc/tree-sitter-analyzer, covering agent instructions, codemap index, test runtime contract, ci test tier contract and agent dogfood feedback loop.
mimirs CLAUDE.md
Claude Code instructions for TheWinci/mimirs, a project described as: Local MCP server that gives AI coding agents persistent, searchable memory of your codebase.