mcp-server-whisper: Instructions file for Claude Code

CLAUDE.md

mcp-server-whisper CLAUDE.md is an instructions file for Claude Code from arcaputo3/mcp-server-whisper. It costs 432 tokens per session, scanned A, original, MIT.

Development instructions for Tengu, an MCP server that lets AI assistants use professional penetration-testing tools. MCP is a standard way for an AI client to call external tools through a server.

In plain words
What is it for?
Use them when developing, testing, linting, or changing Tengu’s tools, request handling, or security checks.
Why use it?
They define the project’s commands, coding conventions, validation rules, and required path for checking and sanitising requests.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is arcaputo3/mcp-server-whisper's own configuration. It tells Claude Code how to work on mcp-server-whisper itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-server-whisper configures →

Reuse

Borrowing it

Nothing to install: this file belongs to arcaputo3/mcp-server-whisper. 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/arcaputo3/mcp-server-whisper/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/arcaputo3/mcp-server-whisper

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.

agentmods badge for mcp-server-whisper CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/arcaputo3/mcp-server-whisper/claude-md.svg)](https://agentmods.dev/instructions/arcaputo3/mcp-server-whisper/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/arcaputo3/mcp-server-whisper/claude-md"><img src="https://agentmods.dev/badge/instructions/arcaputo3/mcp-server-whisper/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 432 This file is loaded in full into every session.
When invoked 432 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00432 $0.00432
Opus 5 $0.00216 $0.00216
Sonnet 5 $0.00086 $0.00086
Haiku 4.5 $0.00043 $0.00043

Measured 8d ago against content hash a7900c897c1b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mcp-server-whisper 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 8d 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 · 44 lines

What it actually says

MCP Server Whisper - Development Guidelines

Commands

  • Run tests: uv run pytest
  • Run single test: uv run pytest tests/path_to_test.py::test_function_name -v
  • Run with coverage: uv run pytest --cov=src
  • Type checking: uv run mypy src
  • Linting: uv run ruff check src
  • Format code: uv run ruff format src
  • Run MCP server: mcp dev src/mcp_server_whisper/server.py
  • Install MCP server: mcp install src/mcp_server_whisper/server.py
  • Setup pre-commit: pre-commit install
  • Run pre-commit: pre-commit run --all-files

Code Style

  • Line length: 120 characters
  • Use type hints for all functions and variables
  • Import order: standard library → typing → third-party → local
  • Use async/await for I/O operations
  • Use Pydantic models for data validation
  • Function/variable naming: snake_case
  • Class naming: PascalCase
  • Constants: UPPER_SNAKE_CASE
  • Follow Google docstring style for documentation

Error Handling

  • Use specific exceptions with descriptive messages
  • Propagate exceptions with raise ... from e
  • Handle errors at appropriate abstraction levels
  • Log errors with context information

MCP Implementation

  • Tools are defined with @mcp.tool() decorator
  • Resources are defined with @mcp.resource() decorator
  • Use batch processing with lists of inputs for parallel operations
  • Process multiple files concurrently using asyncio.gather()
  • Return structured data (typically Dict[str, Any]) for consistent handling

Audio Processing

  • Supports multiple formats: mp3, wav, mp4, mpeg, mpga, m4a, webm
  • GPT-4o direct access supports: mp3, wav
  • Files over 25MB are automatically compressed
  • Parallel processing for batch transcription jobs
  • Transcription options: basic Whisper, GPT-4o with prompt, enhanced transcription
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. 8d ago First seen · 44 lines · 432 tokens per session scan A a7900c897c1b

Subscribe to this mod's changes

mcp-server-whisper CLAUDE.md is an instructions file published in the GitHub repository arcaputo3/mcp-server-whisper (60 stars, last pushed 4mo ago), licensed MIT. It adds 432 tokens to every session, about $0.0022 per session on Opus 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.

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