zx84: Instructions file for Claude Code

CLAUDE.md

zx84 CLAUDE.md is an instructions file for Claude Code from damieng-zx/zx84. It costs 12 tokens per session, scanned A, a copy of kaneo CLAUDE.md, MIT.

Project instructions for working with the zx84 repository, a browser-based Sinclair ZX Spectrum emulator with an MCP server. They point Claude Code to additional project guidance in AGENTS.md.

In plain words
What is it for?
Orienting Claude Code when working on the emulator and its MCP server.
Why use it?
They give the coding agent basic context about the repository and where to find its detailed instructions.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions AGENTS.md.

This is damieng-zx/zx84's own configuration. It tells Claude Code how to work on zx84 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 zx84 configures →

Reuse

Borrowing it

Nothing to install: this file belongs to damieng-zx/zx84. 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/damieng-zx/zx84/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/damieng-zx/zx84

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.

agentmods badge for zx84 CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/damieng-zx/zx84/claude-md/github.svg)](https://agentmods.dev/instructions/damieng-zx/zx84/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/damieng-zx/zx84/claude-md"><img src="https://agentmods.dev/badge/instructions/damieng-zx/zx84/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.

agentmods 80×15 button for zx84 CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/damieng-zx/zx84/claude-md"><img src="https://agentmods.dev/badge/instructions/damieng-zx/zx84/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 12 This file is loaded in full into every session.
When invoked 12 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 88% copy Near-identical to another mod 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 $0.00012 $0.00012
Opus 5 $0.00006 $0.00006
Sonnet 5 $0.00002 $0.00002
Haiku 4.5 $0.00001 $0.00001

Measured 8d ago against content hash a3eca683f480, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

zx84 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 8d 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.

Origin

This is a copy

88% identical to kaneo CLAUDE.md — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 2 lines

What it actually says

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. 8d ago First seen · 2 lines · 12 tokens per session scan A a3eca683f480

Subscribe to this mod's changes

zx84 CLAUDE.md is an instructions file published in the GitHub repository damieng-zx/zx84 (3 stars, last pushed yesterday), licensed MIT. It adds 12 tokens to every session, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to kaneo CLAUDE.md, differing in 6 lines, and is treated as a copy.

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