What is foolery CLAUDE.md?

A set of agent instructions for the Foolery project, including rules for Codex settings, issue tracking, Git worktrees, and dependency setup. A worktree is a separate checkout that lets changes be isolated from other work.

It helps configure Codex, track work with Knots, create isolated worktrees, bootstrap dependencies, and integrate completed changes into the main branch when authorized.

It prevents agents from using the wrong tracker or workflow and keeps parallel development from interfering with the main checkout.

How acartine/foolery configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to acartine/foolery. 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/acartine/foolery/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/acartine/foolery

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/acartine/foolery/claude-md/github.svg)](https://agentmods.dev/instructions/acartine/foolery/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/acartine/foolery/claude-md"><img src="https://agentmods.dev/badge/instructions/acartine/foolery/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/acartine/foolery/claude-md"><img src="https://agentmods.dev/badge/instructions/acartine/foolery/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,131 This file is loaded in full into every session.

When invoked 2,131 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.

Model	Per session	Once invoked
Fable 5.1	$0.02131	$0.02131
Opus 5.5	$0.00852	$0.00852
Sonnet 5.5	$0.00426	$0.00426
Haiku 4.5	$0.00213	$0.00213

Measured 2mo ago against content hash 5aefa9f618a1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

foolery 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 2mo 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 · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

Codex Configuration

When using Codex CLI in this project:

approval_policy: never (autonomous mode for routine work)
model_reasoning_effort: xhigh (complex codebase, needs deep reasoning)

Override with: codex -c approval_policy=ask or codex -c model_reasoning_effort=medium as needed.

Repository Overrides

These repo-level rules are mandatory for all agents working in this project:

Use Knots (kno) as the only work-tracking system.
Do not use any alternate tracker in this repository.
Never move knots to terminal states unless the user explicitly instructs you.
Never use a PR workflow unless the user explicitly instructs you to use PRs.

Git Worktree Policy (Hard Override)

This repository supports parallel agent work using Git worktrees.

Do implementation work in a dedicated Git worktree.
Worktrees may use short-lived local branches for isolation.
Final integrated changes must be pushed to remote main (origin/main).
Do not require reviews or pull requests unless the user explicitly requests them.

Worktree Dependency Bootstrap

Each Git worktree is a separate checkout and does not share node_modules.

After creating or switching to a worktree, run: bun install --frozen-lockfile
Run dependency install before lint, typecheck, test, or build commands.
Prefer bun run <script> over bunx <tool> so plugins resolve from local project dependencies.
If node_modules is missing in the worktree, treat lint/typecheck results as invalid until install completes.

Code Style Constraints

File length: max 500 lines per source file
Function length: max 100 lines per function
Line length: max 100 columns per line

These are enforced by ESLint (max-lines, max-lines-per-function, max-len).

kno Workflows Are Authoritative

kno .loom workflows are the single source of truth; Foolery TS must never override, extend, or post-process them (no synthetic transitions, no parallel canonical graph). Correction actions that skip gates must be named as such and invoke kno idiomatically with force: true (see KnotsBackend.close()); details in docs/DEVELOPING.md.

Read the full file on GitHub · 151 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.

2mo ago First seen · 151 lines · 2,131 tokens per session scan A 5aefa9f618a1

Subscribe to this mod's changes

foolery CLAUDE.md is an instructions file published in the GitHub repository acartine/foolery (60 stars, last pushed 13d ago), licensed MIT. It adds 2,131 tokens to every session, about $0.0085 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 2026-08-30.

DevOps and cloud Git and workflow ai ai-agents beads claude codex gastown

foolery CLAUDE.md next to 6 instructions from other repositories
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foolery CLAUDE.mdacartine/foolery	Instructions file	60	13d ago	MIT	A	2,131	Claude Code
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foolery: Instructions file for Claude Code