Borrowing it
Nothing to install: this file belongs to RobinOppenstam/claude-ralph. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/RobinOppenstam/claude-ralph/main/CLAUDE.mdgit clone --depth 1 https://github.com/RobinOppenstam/claude-ralphWrote 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.
[](https://agentmods.dev/instructions/robinoppenstam/claude-ralph/claude-md)<a href="https://agentmods.dev/instructions/robinoppenstam/claude-ralph/claude-md"><img src="https://agentmods.dev/badge/instructions/robinoppenstam/claude-ralph/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.
<a href="https://agentmods.dev/instructions/robinoppenstam/claude-ralph/claude-md"><img src="https://agentmods.dev/badge/instructions/robinoppenstam/claude-ralph/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01340 | $0.01340 |
| Opus 5 | $0.00670 | $0.00670 |
| Sonnet 5 | $0.00268 | $0.00268 |
| Haiku 4.5 | $0.00134 | $0.00134 |
Grade A, and why
claude-ralph 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
claude-ralph
An autonomous AI agent loop that runs Claude Code repeatedly until all PRD items are complete.
Each iteration is a fresh Claude Code instance with clean context.
Memory persists via git history, progress.txt, and prd.json.
Quick Start
# 1. Install ralph in scripts directory
mkdir -p scripts && cd scripts
git clone https://github.com/RobinOppenstam/claude-ralph ralph
chmod +x ralph/*.sh
cd ..
# 2. (Optional) Install skills globally for interactive use
./scripts/ralph/install-skills.sh
# 3. Create your prd.json (copy from example and edit)
cp scripts/ralph/prd.json.example scripts/ralph/prd.json
# 4. Run ralph from project root
./scripts/ralph/ralph.sh [max_iterations]
File Structure
your-project/
├── scripts/
│ └── ralph/ # Ralph files (self-contained)
│ ├── ralph.sh # Main loop script
│ ├── ralph-once.sh # Single iteration script
│ ├── ralph-status.sh # Status checker
│ ├── prompt.md # Instructions for each iteration
│ ├── prd.json # User stories with passes status
│ ├── progress.txt # Append-only learnings log
│ ├── ralph.log # Execution log
│ ├── .last-branch # Current branch tracker
│ ├── archive/ # Previous runs
│ └── skills/ # Claude Code skills
│
└── [Project root] # Your project files
├── src/ # Source code (created by Ralph)
├── package.json # Dependencies (created by Ralph)
└── ... # Other project files
How It Works
- Loop starts - Ralph reads
prd.json - Pick story - Selects highest priority story where
passes: false - Implement - Claude Code implements the story
- Quality check - Runs typecheck, tests, lint
- Commit - If checks pass, commits changes
- Update PRD - Marks story as
passes: true - Log learnings - Appends to
progress.txt - Repeat - Until all stories pass or max iterations reached
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.
- 9d ago First seen · 168 lines · 1,340 tokens per session scan A 5194ee0e1cb8
claude-ralph CLAUDE.md is an instructions file published in the GitHub repository RobinOppenstam/claude-ralph (11 stars, last pushed 6mo ago), licensed MIT. It adds 1,340 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 2026-08-30.
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