What is habiclient CLAUDE.md?

Project-specific instructions for building Habiclient, a Commodore 64 client for Habitat, a 1986 online multiplayer game. They describe the project, Docker-based builds, required tools, and commands for building its game and disk files.

Use them when working on Habiclient, including building the game, launcher, tools, behavior files, or disk images through Docker or supported local environments.

They give the coding agent the project background and the correct build procedures for an unusual retro-computing codebase.

How ssalevan/habiclient configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ssalevan/habiclient. 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/ssalevan/habiclient/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ssalevan/habiclient

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/ssalevan/habiclient/claude-md/github.svg)](https://agentmods.dev/instructions/ssalevan/habiclient/claude-md)

Your own site

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

Per session 1,579 This file is loaded in full into every session.

When invoked 1,579 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	$0.01579	$0.01579
Opus 5.5	$0.00632	$0.00632
Sonnet 5.5	$0.00316	$0.00316
Haiku 4.5	$0.00158	$0.00158

Measured 2mo ago against content hash d10799a4add6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

habiclient 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 · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Commodore 64 client for Lucasfilm's Habitat (1986) — the world's first MMO. The game engine is written in 6502 assembly using Lucasfilm's custom Macross assembler. A C-based launcher (compiled with cc65) handles login, modem setup, and game loading.

Build Commands

Full Build (Docker — primary method)

./dockerbuild

Runs inside Rocky Linux 9 x86_64 container (QEMU on ARM Mac). Outputs Dist/Habitat-A.d64 and Dist/Habitat-B.d64.

Interactive Docker Shell

./dockershell

Inside Docker (or native Linux x86_64)

export CC65_HOME=/usr/share/cc65
make clean && make        # Full build (both disks)
make diska                # Game disk only (tools → main → launcher → disk)
make diskb                # Data disk only (behaviors, images, sounds, muddle, charset)
make tools                # Build tools only (macross, slinky, muddle, etc.)
make main                 # Assemble game engine only
make -C Launcher          # Build launcher only (requires main)
make behaviors            # Assemble all 224 behavior .bin files

Individual Tool Builds

make -C Tools/macross macross
make -C Tools/slinky
make -C Tools/muddle all

Build Pipeline

Disk A (Game)

Tools: Build macross, slinky, muddle, a65toprg, mcmgtrim, mtobin, filldisk, habdiska
Main: Each .m source → macross → .obj → slinky links all .obj → all.out → a65toprg → all.prg → mcmgtrim → mcmg.prg → exomizer → mcmg.exo
Launcher: launcher.c → cc65 → cl65 → launcher.prg; then 64tass glues BASIC stub + compressed game + raster handler + launcher + title screens → habitat.prg
Disk image: cc1541 writes habitat.prg + serial drivers to Habitat-A.d64

Disk B (Data)

Behaviors, images, sounds, muddle/jmuddle output, and charset assembled in parallel, then filldisk packs them into Habitat-B.d64.

Read the full file on GitHub · 114 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 · 114 lines · 1,579 tokens per session scan A d10799a4add6

Subscribe to this mod's changes

habiclient CLAUDE.md is an instructions file published in the GitHub repository ssalevan/habiclient (12 stars, last pushed 3mo ago), licensed MIT. It adds 1,579 tokens to every session, about $0.0063 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.

Game development

habiclient CLAUDE.md next to 6 instructions from other repositories
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habiclient: Instructions file for Claude Code