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CLAUDE.md@extensionA

CLAUDE.md@extension from juliusbrussee/caveman is a CLAUDE.md file: the standing instructions Claude Code reads in that repo.

Install it, pinned

mdr add juliusbrussee/caveman/extension/CLAUDE.md@git:20261003.2ec7194

Pins git:20261003.2ec7194 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 14 of 14 checks passed
Kind: CLAUDE.md file
Repository: juliusbrussee/caveman
Path: extension/CLAUDE.md
Versions recorded: 5
Latest version: git:20261003.2ec7194, committed Oct 3, 2026
First version recorded: Aug 11, 2026
Size: 3,210 bytes
Repository stars: 113,780
License: Apache-2.0

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# extension — "Caveman Mode" browser extension (MV3, no bundler)

The consumer top-of-funnel: a toggle that, on ChatGPT / Claude / Gemini, prepends the **caveman
skill directive** to each message you send and re-fires the send, so the AI replies in a compact,
high-density style intended to preserve technical substance. It only ever adds text to your *outgoing*
message; it never reads replies, never touches network requests. Savings are `inferred`. (This is
the directive-injector product; an earlier revision shipped a local WASM compress button — EXT
removed it after Chrome Web Store review couldn't reproduce "compress prompt locally".)

## Layout
- `manifest.json` — MV3. `storage` permission only. Content scripts load `src/directive.js` **then** `src/caveman.js` (order matters). Only the fonts are web-accessible — no WASM, no special CSP.
- `src/directive.js` — the **pure** caveman directive text: `buildPrimer`/`buildReminder`/`isPrefixed`/`normMode`. No chrome/DOM/network. Loaded first (exposes `self.CavemanDirective`) and required directly by the test suite.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add juliusbrussee/caveman/extension/CLAUDE.md@sha256:3cf722f1adee3759

The line at the top of this page pins the label git:20261003.2ec7194, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_rczs2t56l2umhidf.svg)](https://markdownregistry.com/a/art_rczs2t56l2umhidf)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Aug 11, 2026 and Oct 3, 2026, about one every 13 days.

version	committed	commit	size	audit
git:20261003.2ec7194 latest	2026-10-03	2ec7194	3,210 B	A	view · diff
git:20261002.613fcfd	2026-10-02	613fcfd	3,211 B	A	view · diff
git:20260908.d5e9772	2026-09-08	d5e9772	3,205 B	A	view · diff
git:20260812.d4ef06b	2026-08-12	d4ef06b	3,096 B	A	view · diff
git:20260811.82864c8	2026-08-11	82864c8	3,143 B	A	view

Audit of the latest version

A 14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Size between 200 bytes and 200 KB (3210 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

juliusbrussee/caveman · 113,780 stars · license Apache-2.0 · pushed 2026-10-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rczs2t56l2umhidf
GET https://markdownregistry.com/api/v1/resolve?ref=juliusbrussee/caveman/extension/CLAUDE.md
GET https://markdownregistry.com/api/v1/blob/3cf722f1adee37598f4c4f65aeca9952076de9fba490cf6d22e354d773ca89bb

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: what a CLAUDE.md file is · keeping AGENTS.md and CLAUDE.md in sync · which agent file does what.