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-performancegit 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-performance)<a href="https://agentmods.dev/skills/tabooharmony/roblox-brain/roblox-performance"><img src="https://agentmods.dev/badge/skills/tabooharmony/roblox-brain/roblox-performance/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-performance"><img src="https://agentmods.dev/badge/skills/tabooharmony/roblox-brain/roblox-performance.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 | $0.00028 | $0.00756 |
| Opus 5.5 | $0.00011 | $0.00302 |
| Sonnet 5.5 | $0.00006 | $0.00151 |
| Haiku 4.5 | $0.00003 | $0.00076 |
Grade A, and why
roblox-performance 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.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Roblox Performance
When to Load
Use for profiling and performance budgets. Pooling and lifecycle patterns: roblox-luau-patterns.
Quick Reference
Profiling Tools
- MicroProfiler (Ctrl+F6): Frame breakdown of scripts, physics, rendering.
- Developer Console (F9): Memory, network, rendering, and server stats.
- Script Profiler (Ctrl+Alt+F5): Per-script CPU and heap.
- Labels:
debug.profilebegin/debug.profileendmark regions;debug.setmemorycategorylabels memory. Gate instrumentation behind a flag.
Performance Targets
| Metric | Starting target | Investigate at |
|---|---|---|
| Server heartbeat | < 16ms | > 33ms |
| Client FPS (desktop) | 60 | < 30 |
| Client FPS (mobile) | 45 | < 30 |
| Memory | device-specific | sustained growth |
Optimize measured hot paths, not folklore. Throttle from measurements; re-profile after shipping.
Parallel Luau
- Use Actors only after profiling identifies isolatable CPU work.
- Workers compute; synchronize before restricted DataModel writes.
- Do not rely on shared module state across Actors.
SendMessagecopies data; SharedTable supports shared state and atomic updates.
Hot-loop cost model
- Luau optimizes global imports; avoid folklore function hoisting/unrolling. Environment impurity can disable optimizations. Profile allocations as well as CPU; GC cost may occur later.
Object Pooling
Pre-clone and reuse. Canonical pool code (token-lease ownership): roblox-luau-patterns.
StreamingEnabled Essentials
- On by default. Container-scoped: only Workspace descendants stream.
ModelStreamingBehavior = Improvedstreams non-BasePart descendants with their parent Model; Legacy streams only BaseParts. - Streamed-out = parented to nil, not destroyed. Luau refs persist if it streams back.
- Config (Studio): target defaults 1024, min 64; set
StreamingIntegrityMode; tune from data. - Gotcha:
FindFirstChild("DistantPart")returns nil if streamed out. Use WaitForChild with timeout.
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.
- 9d ago Changed · +1 lines · +4 tokens per session 13eff30c4c85
- 22d ago Changed · +7 lines cff727f7692b
- 1mo ago Changed · -5 lines f307d904cbe9
- 1mo ago Changed · -3 lines 12f61c48f0c3
- 1mo ago First seen · 62 lines · 24 tokens per session scan A c35bf6ab4a33
roblox-performance is a skill published in the GitHub repository TabooHarmony/roblox-brain (125 stars, last pushed 10d ago), licensed MIT. It adds 28 tokens to every session and 756 once invoked, about $0.0001 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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