What is rockfish-mcp CLAUDE.md?

A set of Claude Code instructions for developing the Rockfish MCP server. It documents setup, locked Python dependencies, environment variables, and how to run the server.

Use it when installing or developing the server, configuring Rockfish and optional Manta access, or starting it locally.

It gives developers the required Python version, virtual-environment steps, package source, and API settings needed to work on the project.

rockfish-mcp CLAUDE.md — Instructions file for coding agents by Rockfish-Data: A set of Claude Code instructions for developing the…

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 instructions/rockfish-data/rockfish-mcp/claude-md

Clone the repo

git clone --depth 1 https://github.com/Rockfish-Data/rockfish-mcp

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/rockfish-data/rockfish-mcp/claude-md.svg)](https://agentmods.dev/instructions/rockfish-data/rockfish-mcp/claude-md)

Your own site

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

Per session 1,337 This file is loaded in full into every session.

When invoked 1,337 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

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	$0.01337	$0.01337
Opus 5	$0.00668	$0.00668
Sonnet 5	$0.00267	$0.00267
Haiku 4.5	$0.00134	$0.00134

Measured 4d ago against content hash 6c8dd24f6bae, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

rockfish-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 4d 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 · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Development Commands

Installation and Setup

IMPORTANT: Always use a virtual environment. Python 3.11 is recommended (SDK requires 3.12 or below).

python3.11 -m venv .venv
source .venv/bin/activate  # On macOS/Linux

# Install in development mode with dev dependencies (includes black and isort)
pip install -e ".[dev]" --find-links https://packages.rockfish.ai

# OR install from requirements.txt (exact locked versions)
pip install -r requirements.txt

Important: The Rockfish SDK is hosted at https://packages.rockfish.ai. The requirements.txt uses --find-links https://packages.rockfish.ai to resolve it.

Environment Setup

Required in a .env file at the project root:

ROCKFISH_API_KEY: API key (required)
ROCKFISH_API_URL: Defaults to https://api.rockfish.ai
ROCKFISH_ORGANIZATION_ID: Falls back to the account default if unset
ROCKFISH_PROJECT_ID: Falls back to the account default if unset
MANTA_API_URL: Enables Manta tools when set (e.g. https://manta.rockfish.ai)

cp .env.example .env

Running the Server

python -m rockfish_mcp.server
# or
rockfish-mcp

Code Formatting

isort src/rockfish_mcp/ && black src/rockfish_mcp/

# Check only
isort --check-only src/rockfish_mcp/ && black --check src/rockfish_mcp/

Running Tests

The test suite has two tiers:

Unit tests — no credentials required, run locally:

pytest tests/test_manta_client.py tests/test_manta_tools.py

Integration tests — require a .env file with real credentials:

# Run all tests against the default .env
pytest tests/

# Target a specific environment file
pytest tests/ --env=.env.staging.local

# Run a specific test
pytest tests/test_list_resources.py::TestListResources::test_list_databases

Test files:

tests/test_manta_client.py: Unit tests for Manta auth headers and endpoint routing (no API needed)
tests/test_manta_tools.py: Unit tests for tool registration, server-side routing, and SQL query backward compatibility (no API needed)
tests/test_list_resources.py: Integration tests for all list_* tools
tests/conftest.py: Session-scoped fixtures; initializes global server clients from env vars; provides --env CLI option

Read the full file on GitHub · 127 lines

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.

4d ago First seen · 127 lines · 1,337 tokens per session scan A 6c8dd24f6bae

Subscribe to this mod's changes

rockfish-mcp CLAUDE.md is an instructions file published in the GitHub repository Rockfish-Data/rockfish-mcp (0 stars, last pushed 4mo ago), licensed MIT. It adds 1,337 tokens to every session, about $0.0067 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 2026-08-31.

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AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,182 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

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rockfish-mcp CLAUDE.md