What is Open-Party-Lab AGENTS.md?

A project guide for Open-Party-Lab, a multiplayer game system with a server, shared screen, phone controller, and shared communication types. It explains which part owns game rules and where important code lives.

Use it when changing server gameplay, host or controller registries, shared protocols, game manifests, or optional external games.

It prevents changes from putting game logic in the wrong app or relying on optional game code that may not be available locally.

How Hartwich/Open-Party-Lab configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Hartwich/Open-Party-Lab. 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/Hartwich/Open-Party-Lab/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Hartwich/Open-Party-Lab

Made for: Codex, OpenCode.

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/hartwich/open-party-lab/agents-md/github.svg)](https://agentmods.dev/instructions/hartwich/open-party-lab/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/hartwich/open-party-lab/agents-md"><img src="https://agentmods.dev/badge/instructions/hartwich/open-party-lab/agents-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/hartwich/open-party-lab/agents-md"><img src="https://agentmods.dev/badge/instructions/hartwich/open-party-lab/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 899 This file is loaded in full into every session.

When invoked 899 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	$0.00899	$0.00899
Opus 5.5	$0.00360	$0.00360
Sonnet 5.5	$0.00180	$0.00180
Haiku 4.5	$0.00090	$0.00090

Measured 2mo ago against content hash 0630ab23d6d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Open-Party-Lab AGENTS.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.

AGENTS.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI Agent Guide

This file is for AI coding agents and humans using them.

Mental Model

The server is authoritative. Gameplay rules, timers, scoring, and round transitions belong in apps/server.
The host renders the shared screen. It should not become the source of truth.
The controller sends player intent and shows phone UI. It should not trust itself for game outcomes.
Protocol types in packages/protocol are the shared room and socket contract between all three apps.
Game manifests drive availability, display names, player counts, and layout selection.
Optional external game repos live under local-games/ during local development and are ignored by this repo.
Missing optional game repos are normal. Do not add static imports to packages that might not exist locally.
New external game repos use the short game name as repo and folder name, for example tap-race, not an open-party-game- prefix.

Important Entry Points

Server game registry: apps/server/src/game-engine/gameRegistry.ts
Host game registry: apps/host/src/games/registry.ts
Controller game registry: apps/controller/src/controller-ui/games/registry.tsx
Optional game list: config/known-games.json
Local game generator: scripts/local-games.mjs
Virtual controller helper for AI browser checks: scripts/virtual-controllers.mjs
Host DEV automation bridge for browser checks: apps/host/src/app/appBootstrap.ts
Catalog: packages/game-core/src/catalog/gameCatalog.ts
Shared protocol exports: packages/protocol/src/index.ts
Room lifecycle: apps/server/src/rooms/roomLifecycle.ts
Host router: apps/host/src/app/router.ts

Public Source Boundaries

Do not reintroduce these without maintainer approval:

private or hidden game prototypes excluded from this public cut
removed experimental prototypes
legacy experiment folders
Temp/, artifacts/, build output, logs, generated browser profiles, or generated external game registries

Contribution Rules

Read the full file on GitHub · 74 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 · 74 lines · 899 tokens per session scan A 0630ab23d6d7

Subscribe to this mod's changes

Open-Party-Lab AGENTS.md is an instructions file published in the GitHub repository Hartwich/Open-Party-Lab (11 stars, last pushed 8d ago), licensed Apache-2.0. It adds 899 tokens to every session, about $0.0036 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 2026-08-31.

Game development ai-agents ai-friendly browser-game local-multiplayer local-multiplayer-games minigames

Open-Party-Lab AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Open-Party-Lab AGENTS.mdHartwich/Open-Party-Lab	Instructions file	11	8d ago	Apache-2.0	A	899	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

Open-Party-Lab: Instructions file for Codex