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.
npx skills add TabooHarmony/roblox-brain --skill roblox-luau-typesgit 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/skills/tabooharmony/roblox-brain/roblox-luau-types)<a href="https://agentmods.dev/skills/tabooharmony/roblox-brain/roblox-luau-types"><img src="https://agentmods.dev/badge/skills/tabooharmony/roblox-brain/roblox-luau-types/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/skills/tabooharmony/roblox-brain/roblox-luau-types"><img src="https://agentmods.dev/badge/skills/tabooharmony/roblox-brain/roblox-luau-types.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00038 | $0.00757 |
| Opus 5.5 | $0.00015 | $0.00303 |
| Sonnet 5.5 | $0.00008 | $0.00151 |
| Haiku 4.5 | $0.00004 | $0.00076 |
Grade A, and why
roblox-luau-types 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 12d 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 — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Luau Type System
When to Load
Load for Luau annotations, inference, narrowing, strictness, exports, and solver features. Syntax: roblox-luau-core; lifecycle/scheduling: roblox-luau-patterns.
Quick Reference
Strictness: --!strict for maintained code, --!nonstrict while transitioning, --!nocheck only for legacy or generated code. Directives and project settings select the mode; never assume one global default.
New solver gate: keyof, rawkeyof, setmetatable<T, M>, type functions, and read members need the new type solver. On by default for nocheck/nonstrict projects; strict projects need Workspace.UseNewLuauTypeSolver = Enabled (Scripting). Errors here usually mean wrong solver, not wrong syntax.
Inference philosophy: Infer first; annotate boundaries (params, returns, exports). Don't annotate every local.
Sealed vs unsealed tables: An unannotated local table stays open to new fields until annotated, returned from a function, or its scope exits; annotation seals it. Build tables fully before annotating; passing a table to a typed function does not seal it.
Unions: local id: string | number is a union; prefer tagged unions (type State<T> = {kind:"loading"} | {kind:"ready", value:T}) and discriminate on kind to narrow.
Narrowing: typeof, IsA, assertions, and tagged discriminants refine types; examples in full.md.
Missing keys: use { [K]: V? } when lookups may miss; narrow before use.
Closed vocabularies: prefer literal unions; never checks can flag missing branches. Keep requires statically resolvable. Practitioner guidance: full.md.
Generics: Use when input→output type matters: function first<T>(list: {T}): T?, or type Result<T> = {success: boolean, value: T?}. Never replace with any.
Type exports: export type Foo = {...} at module boundaries; consumers use Types.Foo.
Object typing: typeof(setmetatable({} :: CounterData, Counter)) types precise self; the new solver adds setmetatable<T, M> directly.
What ships with it
1 file 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.
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.
- 12d ago Changed · +1 lines · -2 tokens per session 547e852a7773
- 13d ago Changed · +5 lines 1b0b893d6b1e
- 24d ago Changed · +1 lines 5e1110ed6e2c
- 1mo ago Changed · -20 lines · +5 tokens per session 11d0ad37d4b1
- 1mo ago First seen · 63 lines · 35 tokens per session scan A 41e00c4fd188
roblox-luau-types is a skill published in the GitHub repository TabooHarmony/roblox-brain (131 stars, last pushed 12d ago), licensed MIT. It adds 38 tokens to every session and 757 once invoked, about $0.0002 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.
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