What is iterm2-mcp CLAUDE.md?

Repository instructions for Claude Code contributors working on iterm2-mcp, an MCP server that controls iTerm2 through its Python API. They cover commands, coding style, type checking, and the server architecture.

Use them to run linting, formatting, type checks, the local server, and to understand terminal-session handling and command completion.

They explain the project’s conventions and verification commands so code changes fit the repository and can be checked consistently.

How lorencarvalho/iterm2-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lorencarvalho/iterm2-mcp. 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/lorencarvalho/iterm2-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/lorencarvalho/iterm2-mcp

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/lorencarvalho/iterm2-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/lorencarvalho/iterm2-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/lorencarvalho/iterm2-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/lorencarvalho/iterm2-mcp/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/lorencarvalho/iterm2-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/lorencarvalho/iterm2-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 305 This file is loaded in full into every session.

When invoked 305 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	$0.00305	$0.00305
Opus 5.5	$0.00122	$0.00122
Sonnet 5.5	$0.00061	$0.00061
Haiku 4.5	$0.00030	$0.00030

Measured 2mo ago against content hash 8d8e88da5061, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

iterm2-mcp 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 · 32 lines

What it actually says

CLAUDE.md

Project

MCP server exposing iTerm2 control via the iTerm2 Python API. Single-module server (src/iterm2_mcp/server.py) using FastMCP.

Commands

uv sync                    # Install dependencies
uv run ruff check          # Lint
uv run ruff format         # Format
uv run ty check            # Type check
uv run iterm2-mcp          # Run the server locally

Code style

Ruff for linting and formatting: line length 100, rules E, F, I, UP, B
ty for type checking, targeting Python 3.12
Type hints on all function signatures
Sphinx-style :param docstrings — document the "why", not the "what"
Comments above the code they describe, not at end of line
Imports: stdlib first, then third-party, then local

Architecture

All tools are async functions decorated with @mcp.tool() in server.py
A single iterm2.Connection is created lazily and shared via _connection_singleton()
_session(session_id) resolves a session by ID or falls back to the active session — most tools accept an optional session_id
run_command uses iterm2.PromptMonitor for real completion detection (requires shell integration)

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 · 32 lines · 305 tokens per session scan A 8d8e88da5061

Subscribe to this mod's changes

iterm2-mcp CLAUDE.md is an instructions file published in the GitHub repository lorencarvalho/iterm2-mcp (1 stars, last pushed 6mo ago), licensed MIT. It adds 305 tokens to every session, about $0.0012 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 2026-08-31.

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iterm2-mcp: Instructions file for Claude Code