What is System7 CLAUDE.md?

Repository instructions for System 7, including how to build and run its kernel in QEMU, add languages, debug with GDB, and find project documentation.

Use them to compile System 7, start it in the emulator, enable French, German, or Japanese, debug it, or understand its source and resource directories.

They give developers the commands and project layout needed to work on the operating-system codebase.

How Kelsidavis/System7 configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Kelsidavis/System7. 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/Kelsidavis/System7/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Kelsidavis/System7

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/kelsidavis/system7/claude-md/github.svg)](https://agentmods.dev/instructions/kelsidavis/system7/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/kelsidavis/system7/claude-md"><img src="https://agentmods.dev/badge/instructions/kelsidavis/system7/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/kelsidavis/system7/claude-md"><img src="https://agentmods.dev/badge/instructions/kelsidavis/system7/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 645 This file is loaded in full into every session.

When invoked 645 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	$0.00645	$0.00645
Opus 5.5	$0.00258	$0.00258
Sonnet 5.5	$0.00129	$0.00129
Haiku 4.5	$0.00064	$0.00064

Measured 1mo ago against content hash efdca71f1646, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

System7 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 · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Guide

This file collects repository-specific guidance for AI coding assistants. The README and docs/ are the source of truth for project status and user-facing documentation; keep this guide focused on development workflow.

Start here

README.md: project overview, supported workflows, and current status.
docs/INDEX.md: documentation map.
docs/KNOWN_ISSUES.md: confirmed bugs and limitations.
docs/CONTRIBUTING.md: contribution conventions.

The code is organized by subsystem under src/ and include/; hardware-specific implementations live under src/Platform/. Check the active PLATFORM and Makefile source lists before assuming a file is built.

Build and test

The default platform is x86. Useful commands:

make                         # Build the default x86 kernel
make run                     # Boot the x86 ISO in QEMU
make debug                   # Boot under QEMU and wait for a debugger
make check                   # Build plus local x86 quality checks
make analyze                 # x86 build with GCC's static analyzer
make analyze-arm             # ARM32 analyzer build
make analyze-arm64           # ARM64 analyzer build
make PLATFORM=arm64          # Build the ARM64 kernel
make PLATFORM=ppc            # Build the experimental PowerPC target
make clean                   # Remove generated build artifacts

make check covers the strict build, x86 ELF layout, allocator policy, standard-library differential tests, and required exports. CI additionally builds supported configurations and platforms and boots the x86 ISO with BIOS and UEFI firmware. Run the narrowest relevant checks while iterating, then run make check for changes that affect shared code. Do not claim that a build proves runtime behavior on hardware that was not tested.

INTEGRATION_TESTS=1 includes tests that execute during boot. To build, run QEMU, and parse their serial results, use python3 tests/run_integration_tests.py.

Read the full file on GitHub · 71 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.

1mo ago Changed · -178 lines · -1,232 tokens per session scan B → A efdca71f1646
1mo ago Changed · -3 lines · -57 tokens per session 2e05e987b896
2mo ago First seen · 252 lines · 1,934 tokens per session scan B d91fd0df8255

Subscribe to this mod's changes

System7 CLAUDE.md is an instructions file published in the GitHub repository Kelsidavis/System7 (374 stars, last pushed 1mo ago), licensed MIT. It adds 645 tokens to every session, about $0.0026 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.

System7 CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
System7 CLAUDE.mdKelsidavis/System7	Instructions file	374	1mo ago	MIT	A	645	Claude Code
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next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	275k	2d ago	MIT	A	4,313	Codex, OpenCode

System7: Instructions file for Claude Code