Borrowing it
Nothing to install: this file belongs to TabooHarmony/roblox-brain. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/TabooHarmony/roblox-brain/main/AGENTS.mdgit clone --depth 1 https://github.com/TabooHarmony/roblox-brainWrote 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.
[](https://agentmods.dev/instructions/tabooharmony/roblox-brain/agents-md)<a href="https://agentmods.dev/instructions/tabooharmony/roblox-brain/agents-md"><img src="https://agentmods.dev/badge/instructions/tabooharmony/roblox-brain/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.
<a href="https://agentmods.dev/instructions/tabooharmony/roblox-brain/agents-md"><img src="https://agentmods.dev/badge/instructions/tabooharmony/roblox-brain/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01680 | $0.01680 |
| Opus 5.5 | $0.00672 | $0.00672 |
| Sonnet 5.5 | $0.00336 | $0.00336 |
| Haiku 4.5 | $0.00168 | $0.00168 |
Grade A, and why
roblox-brain 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 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.
How it starts
The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md: Guide for AI Agents and Contributors
What This Repo Is
roblox-brain is a skills-only repository for AI coding agents working with Roblox Studio. 29 curated skills in four libraries (core, gameplay, design, tools), covering Luau, Roblox engine APIs, architecture, game design, security, monetization, localization, and workflow. Distributed via npx skills add TabooHarmony/roblox-brain; install a single library with npx skills add TabooHarmony/roblox-brain/skills/core (or another library path).
No plugin code. No build system. No npm package. Just SKILL.md files.
Architecture: Progressive Disclosure
Each skill follows progressive disclosure. Compatible hosts discover skill names and descriptions, then load the selected entry point and references as needed.
- Skill metadata: the host discovers names and descriptions from each
SKILL.md - SKILL.md (~600 tokens, max 3,000 chars): quick reference, enough for most tasks
- references/full.md (max 50,000 chars): detailed guidance and examples for full skills
Thin routing skills declare kind: router and may omit references/full.md when
their entire job is selecting the right domain skills.
The README is the human-facing catalogue. Skill hosts discover the individual SKILL.md files directly.
skills/gameplay/roblox-gui/
├── SKILL.md ← Quick Reference (under 3,000 chars)
└── references/
└── full.md ← Full Reference (under 50,000 chars)
Skill File Structure
Every SKILL.md must have:
---
name: roblox-<name>
description: >
One-line description, under 150 chars.
when_to_use: "Optional trigger phrases: the words users type when they need this skill (fix, change, review, audit, symptoms), under 300 chars."
last_reviewed: YYYY-MM-DD
sources:
- https://create.roblox.com/docs/... # or [original] for synthesis
---
# Skill Title
## When to Load
1-3 sentences on when an agent should load this skill. Include cross-refs to related skills in backticks.
## Quick Reference
Dense table or list format. The most useful info inline. Code examples in ```luau blocks.
> Full code examples and API tables: [references/full.md](references/full.md)
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.
- 8d ago Changed · +4 lines · +138 tokens per session 03f05dd3acfe
- 1mo ago Changed · +96 tokens per session 092eb7ab3620
- 1mo ago First seen · 137 lines · 1,446 tokens per session scan A eb0df61524f2
roblox-brain AGENTS.md is an instructions file published in the GitHub repository TabooHarmony/roblox-brain (124 stars, last pushed 9d ago), licensed MIT. It adds 1,680 tokens to every session, about $0.0067 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).