ralph-bug-hunt

ralph-bug-hunt is a skill for Claude Code, Codex from johnnichev/selectools. It costs 56 tokens per session (1,869 once invoked), scanned A, original, Apache-2.0.

A testing assistant for the selectools codebase, including unit tests that check one piece of code and integration tests that check pieces working together.

In plain words
What is it for?
Use it to write mock-based tests, regression tests, provider tests, and integration tests with the project’s shared fake provider.
Why use it?
It follows the project’s existing test patterns, making new tests fit the codebase and helping prevent previously fixed bugs from returning.

Skill for Claude CodeCodex

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 skills/johnnichev/selectools/ralph-bug-hunt
Any agent
npx skills add johnnichev/selectools --skill ralph-bug-hunt
Clone the repo
git clone --depth 1 https://github.com/johnnichev/selectools

Made for: Claude Code, Codex.

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 ralph-bug-hunt

README.md
[![agentmods](https://agentmods.dev/badge/skills/johnnichev/selectools/ralph-bug-hunt.svg)](https://agentmods.dev/skills/johnnichev/selectools/ralph-bug-hunt)
Your own site
<a href="https://agentmods.dev/skills/johnnichev/selectools/ralph-bug-hunt"><img src="https://agentmods.dev/badge/skills/johnnichev/selectools/ralph-bug-hunt.svg" alt="Measured on agentmods" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,869 The whole file, excluding the scripts and references it only reads on demand.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00056 $0.01869
Opus 5 $0.00028 $0.00934
Sonnet 5 $0.00011 $0.00374
Haiku 4.5 $0.00006 $0.00187

Measured 4d ago against content hash 3dd53737bbf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ralph-bug-hunt 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/skills/ralph-bug-hunt/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ralph Bug Hunt

Autonomous bug hunt + auto-fix loop for module: $ARGUMENTS

If no module is given, default to "rag".

Loop Count

Parse the loops=N parameter from $ARGUMENTS if present. This controls how many hunt-fix-verify cycles to run before emitting the sentinel. Default: 1 (single pass).

  • loops=1 (default) — one pass: hunt, fix, verify, emit sentinel
  • loops=3 — three passes: after fixing, re-scan the same module for new bugs exposed by the fixes, fix those too, repeat until N passes or clean
  • loops=0 — audit only: hunt and report but do NOT fix anything

When loops > 1, each pass re-reads all source files from scratch (fixes from pass 1 may expose new issues in pass 2). If a pass finds zero bugs, emit RALPH_RESULT: CLEAN immediately without running remaining passes.

Orchestration Script

The scripts/ralph_bug_hunt.sh script runs this skill in a convergence loop. Configure via environment variables:

MAX_ITER=10 REQUIRED_CLEAN=3 bash scripts/ralph_bug_hunt.sh        # all modules
MAX_ITER=5 REQUIRED_CLEAN=2 bash scripts/ralph_bug_hunt.sh rag     # single module
REQUIRED_CLEAN=1 bash scripts/ralph_bug_hunt.sh agent providers    # quick pass

What makes this different from /bug-hunt

  1. Every finding is fixed immediately — no "ask user" step.
  2. The last line of output is always a machine-parseable sentinel so the orchestration script (scripts/ralph_bug_hunt.sh) can detect convergence.

Step 0 — Parse Arguments

Parse $ARGUMENTS to extract:

  • module: the first word (e.g. "rag", "agent")
  • loops: if loops=N appears, extract N (integer). Default: 1.

Example: rag loops=3 → module="rag", loops=3 Example: agent → module="agent", loops=1 Example: providers loops=0 → module="providers", loops=0 (audit only, no fixes)

If loops=0, skip Steps 3-4 entirely. Only run Steps 1-2 (scan + report) and Step 5 (sentinel).

If loops > 1, wrap Steps 2-4 in a loop. After each pass, if zero findings, break early.

Read the full file on GitHub · 192 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. 4d ago First seen · 192 lines · 56 tokens per session scan A 3dd53737bbf2

Subscribe to this mod's changes

ralph-bug-hunt is a skill published in the GitHub repository johnnichev/selectools (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 56 tokens to every session and 1,869 once invoked, about $0.0003 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.