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falsegreen-skill: Instructions file for Claude Code

CLAUDE.md

falsegreen-skill CLAUDE.md is an instructions file for Claude Code from vinicq/falsegreen-skill. It costs 583 tokens per session, scanned A, original, MIT.

Repository instructions for falsegreen-skill, a tool and protocol for finding false-positive tests—tests that pass even when the code is wrong. They describe the project's public files, supported hosts, and maintenance boundaries.

In plain words
What is it for?
Use them when maintaining, testing, or packaging falsegreen-skill for Claude Code, Codex, Gemini, Cursor, the command-line tool, or direct API use.
Why use it?
They give coding agents the project context needed to change the right public files without confusing the skill layer with its separate Python scanner.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

This is vinicq/falsegreen-skill's own configuration. It tells Claude Code how to work on falsegreen-skill 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 falsegreen-skill configures →

not rated 2repo 9d ago A scan 583 tokens original MIT
View source ↗ vinicq/falsegreen-skill vinicq.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to vinicq/falsegreen-skill. 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/vinicq/falsegreen-skill/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/vinicq/falsegreen-skill

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/vinicq/falsegreen-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/vinicq/falsegreen-skill/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/vinicq/falsegreen-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/vinicq/falsegreen-skill/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 583 This file is loaded in full into every session.
When invoked 583 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 $0.00583 $0.00583
Opus 5.5 $0.00233 $0.00233
Sonnet 5.5 $0.00117 $0.00117
Haiku 4.5 $0.00058 $0.00058

Measured 1mo ago against content hash 309546ed593e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

falsegreen-skill 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 1mo 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 · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md - falsegreen-skill

Project context for Claude Code and other agents opening this repository.

What This Project Is

falsegreen-skill is a public LLM skill for finding false-positive tests: tests that stay green even when the implementation is wrong.

It is not Claude-specific. The same protocol is packaged for Claude Code, Codex, Gemini, Cursor, plain LLM prompts, API usage, and the npm CLI.

The companion falsegreen project is the deterministic Python scanner. This repository is the semantic, multi-host skill layer.

Public Repo Boundary

This repo should contain only public product assets:

  • SKILL.md - canonical J1-J6 protocol and structural catalog rules.
  • reference.md - per-language pattern catalog and look-alike exemptions.
  • schema/ - canonical machine-readable output contracts.
  • skills/ - plugin skill entry points.
  • .claude-plugin/, .codex-plugin/, .antigravity-plugin/, .agents/, .gemini/ - host packaging metadata (.antigravity-plugin/ = Antigravity CLI plugin for agy plugin install; .agents/skills/ = Antigravity CLI workspace skill; .gemini/ = legacy Gemini CLI copy).
  • contexts/ - host-specific usage guides.
  • bin/ and scripts/ - CLI and packaging/validation scripts.
  • examples/ - public examples only.

Do not add private datasets, adjudication notes, unpublished paper drafts, internal agent outputs, or benchmark artifacts here.

Maintenance Rules

  • Keep SKILL.md, llm.md, GEMINI.md, and host contexts consistent when the protocol changes.
  • Treat schema/finding.json and schema/report.json as the source of truth for JSON output.
  • Supported languages in public docs: Python, TypeScript, JavaScript, and Robot Framework (the catalog covers all four, mirroring the static scanners). Gherkin and Tavern are covered as secondary semantic passes in reference.md.
  • The skill is a superset of the three static scanners: every structural code in falsegreen / falsegreen-js / robotframework-falsegreen must appear in reference.md, plus the AI-only semantic codes (S-series).
  • Prefer thin host entry points that reference the canonical protocol instead of duplicating the full catalog.
  • Run npm run validate before release.
  • Run npm run build:targets when preparing standalone Claude/Gemini skill packages.

Read the full file on GitHub · 63 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. 1mo ago First seen · 63 lines · 583 tokens per session scan A 309546ed593e

Subscribe to this mod's changes

falsegreen-skill CLAUDE.md is an instructions file published in the GitHub repository vinicq/falsegreen-skill (2 stars, last pushed 9d ago), licensed MIT. It adds 583 tokens to every session, about $0.0023 per session on Opus 5.5. 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.

Claude CodeDebuggingLLMTestingaiclaudecode-qualitymcp
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