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blackfish: Instructions file for Claude Code

CLAUDE.md

blackfish CLAUDE.md is an instructions file for Claude Code from princeton-ddss/blackfish. It costs 937 tokens per session, scanned A, original, MIT.

A project instruction file for Blackfish, an open-source AI platform that runs machine-learning models on high-performance computing clusters. It documents the repository’s Python backend, React web interface, tests, and commands.

In plain words
What is it for?
It is for guiding changes, testing, formatting, and builds in a Python backend and React frontend monorepo.
Why use it?
It gives the coding agent project-specific context so it can work in the correct folders and use the expected development commands.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is princeton-ddss/blackfish's own configuration. It tells Claude Code how to work on blackfish 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 blackfish configures →

not rated 24repo +1 10d ago A scan 937 tokens original MIT
View source ↗ princeton-ddss/blackfish princeton-ddss.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to princeton-ddss/blackfish. 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/princeton-ddss/blackfish/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/princeton-ddss/blackfish

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 blackfish CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/princeton-ddss/blackfish/claude-md.svg)](https://agentmods.dev/instructions/princeton-ddss/blackfish/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/princeton-ddss/blackfish/claude-md"><img src="https://agentmods.dev/badge/instructions/princeton-ddss/blackfish/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 937 This file is loaded in full into every session.
When invoked 937 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 $0.00937 $0.00937
Opus 5 $0.00468 $0.00468
Sonnet 5 $0.00187 $0.00187
Haiku 4.5 $0.00094 $0.00094

Measured 6d ago against content hash 77e2d6c58a41, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

blackfish 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.

CLAUDE.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blackfish Monorepo

Open-source AI-as-a-Service (MLaaS) platform for running ML models on HPC clusters.

Repository Structure

blackfish/
├── lib/          # Python backend (blackfish-ai package)
├── web/          # Next.js frontend (blackfish-ui)
└── .github/      # CI/CD workflows (path-dependent)

Quick Reference

Python Backend (lib/)

cd lib
uv sync                           # Install dependencies
uv run pytest                     # Run tests
uv run pre-commit run --all-files # Lint & format
uv run blackfish --help           # CLI commands

React Frontend (web/)

cd web
npm install        # Install dependencies
npm run dev        # Dev server (localhost:3000)
npm test           # Run vitest tests
npm run build:lib  # Build and copy to Python package

Architecture Overview

  • Backend: Litestar async web framework, SQLAlchemy ORM, Alembic migrations
  • Frontend: Vite + React 18, React Router, Tailwind CSS, SWR
  • Services: Text Generation, Speech Recognition (extensible base classes)
  • CLI: Rich-click powered, profile/service/job management

Commits

Follow the Conventional Commits specification.

Scopes: lib, web, ci, docs (optional — omit for cross-cutting changes)

Key Conventions

  • Python 3.12+, strict MyPy type checking enabled
  • All Python code formatted with Ruff
  • Frontend uses ESLint, components in web/src/components/
  • Service-specific routes in web/src/routes/{service-name}/
  • Database migrations in lib/src/blackfish/server/db/migrations/

Testing

  • Python: uv run pytest (pytest + coverage)
  • Frontend: npm test (vitest + React Testing Library)
  • CI runs path-dependent workflows (lib.yml, web.yml)

Pull Requests

Always use /pr to create pull requests. This command:

  • Validates branch state
  • Runs lint and tests for affected packages
  • Updates coverage badge (Python changes)
  • Creates PR with proper format

See CONTRIBUTING.md for the full PR checklist.

Read the full file on GitHub · 111 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.

  1. 6d ago First seen · 111 lines · 937 tokens per session scan A 77e2d6c58a41

Subscribe to this mod's changes

blackfish CLAUDE.md is an instructions file published in the GitHub repository princeton-ddss/blackfish (24 stars, last pushed 10d ago), licensed MIT. It adds 937 tokens to every session, about $0.0047 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 2026-09-01.

FrontendProject managementReact
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