What is mTarsier CLAUDE.md?

A set of project instructions for mTarsier, including coding rules for its Rust, React, Tailwind CSS, and Tauri code. Tauri is a framework for building desktop apps with web interfaces and Rust.

It guides changes such as handling Rust errors, using the project's color tokens, registering Tauri commands, keeping components short, and naming branches correctly.

It gives a coding agent the project-specific rules needed to avoid inconsistent code and missed setup steps.

How mcp360/mTarsier configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to mcp360/mTarsier. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/mcp360/mTarsier/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/mcp360/mTarsier

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/mcp360/mtarsier/claude-md/github.svg)](https://agentmods.dev/instructions/mcp360/mtarsier/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/mcp360/mtarsier/claude-md"><img src="https://agentmods.dev/badge/instructions/mcp360/mtarsier/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/mcp360/mtarsier/claude-md"><img src="https://agentmods.dev/badge/instructions/mcp360/mtarsier/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 178 This file is loaded in full into every session.

When invoked 178 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00178	$0.00178
Opus 5.5	$0.00071	$0.00071
Sonnet 5.5	$0.00036	$0.00036
Haiku 4.5	$0.00018	$0.00018

Measured 2mo ago against content hash 4c3867b5b26c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mTarsier 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 2mo 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.

CLAUDE.md · 13 lines

What it actually says

mTarsier — Claude Code Instructions

See AGENTS.md for full project guide, architecture, conventions, and key file paths.

Quick Rules

Do not use unwrap() in Rust — use ? or map_err
Do not hardcode hex colors — use Tailwind CSS variable tokens
Do not add a new Tauri command without registering it in both commands/mod.rs and lib.rs
Keep React components under 150 lines
src-tauri/binaries/ is gitignored — never commit compiled binaries
Branch names must follow <type>/<description> — see AGENTS.md for the full prefix list (feature/, fix/, perf/, refactor/, chore/, docs/, test/, release/)

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.

2mo ago First seen · 13 lines · 178 tokens per session scan A 4c3867b5b26c

Subscribe to this mod's changes

mTarsier CLAUDE.md is an instructions file published in the GitHub repository mcp360/mTarsier (50 stars, last pushed 6mo ago), licensed MIT. It adds 178 tokens to every session, about $0.0007 per session on Opus 5.5. 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 2026-08-30.

mcp mcp-apps mcp-manager mcp-toolbox mcp-tools model-context-protocol

mTarsier CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mTarsier CLAUDE.mdmcp360/mTarsier	Instructions file	50	6mo ago	MIT	A	178	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

mTarsier: Instructions file for Claude Code