roblox-core

roblox-core is a skill for Claude Code, Codex from nonlooped/roblox-suite. It costs 59 tokens per session (2,322 once invoked), scanned A, original, MIT.

A foundation guide to Luau, the programming language used in Roblox, and to Roblox's built-in services and game structure. It explains where code runs, how Roblox's client and server communicate, and how data is represented and stored.

In plain words
What is it for?
Use it when writing Roblox scripts, accessing services, choosing script locations, handling tables and types, serializing data, or working with streaming and attributes.
Why use it?
It gives the basic rules needed to place code correctly and avoid mistakes caused by confusing client code, server code, objects, or data types.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when writing Roblox scripts, accessing services, choosing script locations, handling tables and types, serializing data, or working with streaming and attributes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nonlooped/roblox-suite/roblox-core
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add nonlooped/roblox-suite --skill roblox-core
Clone the repo
git clone --depth 1 https://github.com/nonlooped/roblox-suite

Made for: Claude Code, Codex.

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 roblox-core

README.md
[![agentmods](https://agentmods.dev/badge/skills/nonlooped/roblox-suite/roblox-core/github.svg)](https://agentmods.dev/skills/nonlooped/roblox-suite/roblox-core)
Your own site
<a href="https://agentmods.dev/skills/nonlooped/roblox-suite/roblox-core"><img src="https://agentmods.dev/badge/skills/nonlooped/roblox-suite/roblox-core/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 roblox-core

Your own site · 80×15
<a href="https://agentmods.dev/skills/nonlooped/roblox-suite/roblox-core"><img src="https://agentmods.dev/badge/skills/nonlooped/roblox-suite/roblox-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,322 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00059 $0.02322
Opus 5 $0.00030 $0.01161
Sonnet 5 $0.00012 $0.00464
Haiku 4.5 $0.00006 $0.00232

Measured 9d ago against content hash e856c70d4fd6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

roblox-core 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 9d 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.

roblox-core/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

roblox-core

Key sources: https://create.roblox.com/docs/en-us/scripting/services, https://create.roblox.com/docs/en-us/luau, https://create.roblox.com/docs/en-us/luau/tables, https://create.roblox.com/docs/en-us/luau/type-checking, https://create.roblox.com/docs/en-us/scripting/locations, https://create.roblox.com/docs/en-us/projects/data-model, https://create.roblox.com/docs/en-us/projects/client-server, https://create.roblox.com/docs/en-us/workspace/streaming, https://create.roblox.com/docs/en-us/scripting/multithreading, https://create.roblox.com/docs/en-us/scripting/attributes

Every other skill in this toolset assumes you understand the material here.

The Universal Roblox Scripting Pattern

  1. local Service = game:GetService("ServiceName") — do this once, name the variable after the service.
  2. local Module = require(ReplicatedStorage:WaitForChild("Module"))
  3. Local helper functions.
  4. Connect to events.

Services are the primary way you access engine functionality instead of a traditional standard library.

Modern Task Library

Use the modern task API; the legacy globals wait(), spawn(), and delay() are deprecated/soft-deprecated:

  • task.wait(n?) — yields for about n seconds (default one frame) and returns elapsed time.
  • task.spawn(f, ...) — schedules f to run asynchronously.
  • task.defer(f, ...) — defers f until after the current event cycle.
  • task.cancel(thread) — cancels a thread returned by task.spawn/task.defer.

For parallel code, task.desynchronize() and task.synchronize() move the current thread between the parallel and serial phases.

Important Services (categorized)

Container / hierarchy services (visible in Explorer, part of the DataModel):

  • Workspace (3D content)
  • Lighting (environment, atmosphere, post effects)
  • ReplicatedStorage / ReplicatedFirst (shared code & assets)
  • ServerScriptService (server-only logic)
  • StarterGui / StarterPlayer / StarterPack (templates cloned to players)
  • Players, Teams, SoundService, etc.

Read the full file on GitHub · 158 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 158 lines · 59 tokens per session scan A e856c70d4fd6

Subscribe to this mod's changes

roblox-core is a skill published in the GitHub repository nonlooped/roblox-suite (14 stars, last pushed 6d ago), licensed MIT. It adds 59 tokens to every session and 2,322 once invoked, about $0.0003 per session on Opus 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.

Related

Other skills, from other repositories

roblox-engineer

!cat skills/shared/game-visual-foundations.md 2>/dev/null || echo "=== Visual Foundations not loaded ===" !cat skills/shared/protocols/ux-protocol.md 2>/dev/null || true !cat skills/shared/protocols/game-test-protocol.md 2>/dev/null || true !cat skills/shared/protocols/quality-gate.md 2>/dev/null || true !cat…

buiphucminhtam/forgewright · 50 tokens

roblox-dev-skill

Core scripting and engine skill for Roblox game development. Covers full-lifecycle development: architecture, Luau scripting, debugging, security, performance, data persistence, networking, and the Roblox Studio environment. MUST use this skill whenever the user mentions: 'Roblox', 'Luau', 'Roblox Studio'…

MSayib/roblox-dev-skill · 145 tokens

roblox-best-practices

Framework-agnostic Roblox/Luau coding standards. Use when writing, reviewing, or refactoring any Luau code (Script, LocalScript, ModuleScript) in a Roblox project, or when the user asks to keep best practices in mind as standing guidance — enforces the VARIABLES/FUNCTIONS/INITIALIZATION layout, naming, performance…

andrian-syh/roblox-best-practices-skill · 184 tokens

professional-game-developer

Universal production game engineering skill — design, build, profile, test, and ship games across Unreal Engine 5, Unity 6 (DOTS), Godot 4.3+, Roblox (Luau), and Web/Custom engines with senior studio-grade architectural discipline. Encompasses all 42 specialized game studio job roles across 6 departments: Game Design…

chahat1709/professional-game-developer.skill · 103 tokens

roblox-studio

Build, inspect, repair, validate, and playtest Roblox Studio maps and Luau through the local bridge. Use for SceneSpecs, terrain, Studio edits, gameplay objects, visual checks, and Rojo output.

ShiroKSH/skills · 48 tokens

game-engineer

Meta-skill for game development that orchestrates specialized engine skills. Routes to the appropriate game engine skill (Unity, Unreal, Godot, Roblox, Phaser 3, Three.js) based on project requirements. Provides unified game development workflow.

buiphucminhtam/forgewright · 52 tokens