Borrowing it
Nothing to install: this file belongs to Johna2an/critical-thinking. 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/Johna2an/critical-thinking/main/CLAUDE.mdgit clone --depth 1 https://github.com/Johna2an/critical-thinkingWrote 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/johna2an/critical-thinking/claude-md)<a href="https://agentmods.dev/instructions/johna2an/critical-thinking/claude-md"><img src="https://agentmods.dev/badge/instructions/johna2an/critical-thinking/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/johna2an/critical-thinking/claude-md"><img src="https://agentmods.dev/badge/instructions/johna2an/critical-thinking/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 | $0.00301 | $0.00301 |
| Opus 5.5 | $0.00120 | $0.00120 |
| Sonnet 5.5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
critical-thinking 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.
What it actually says
CLAUDE.md
critical-thinking is an open-source Agent Skill for Claude Code and Claude-based agents that makes Claude reason with explicit probabilities, base rates, and falsifiers: in blind evaluations it ranked first in 18 of 18 judge passes against baseline Claude and GPT-5.5.
Read AGENTS.md for the repo map, install command, eval pipeline, and working conventions. The points below are the ones violated most easily:
- The installable skill is
skill/only.versions/v1/is a frozen snapshot for reproducible A/B evals; never edit it. - Claims about the skill ride on evals. Behavioral changes to
skill/need a before/after run of the relevant round inevals/(seeCONTRIBUTING.mdfor the loop andevals/README.mdfor the protocol). - Never commit book text or paste long excerpts anywhere in the repo. Reference files are original prose restating each book's methods; short attributed phrases are the ceiling.
- Docs prose is plain and declarative: no em dashes, no "not X, but Y" constructions, every number names its measure. Verbatim judge quotes are exempt.
_verdicts.jsonis derived data. Recompute fromjudges/*.json+rotation_map.jsonvia the deterministic aggregators inevals/harness/rather than editing it.
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.
- 1mo ago First seen · 12 lines · 301 tokens per session scan A b79bfec269a0
critical-thinking CLAUDE.md is an instructions file published in the GitHub repository Johna2an/critical-thinking (7 stars, last pushed 4mo ago), licensed MIT. It adds 301 tokens to every session, about $0.0012 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.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.