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 nonlooped/roblox-suite --skill roblox-physicsgit clone --depth 1 https://github.com/nonlooped/roblox-suiteWrote 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/nonlooped/roblox-suite/roblox-physics)<a href="https://agentmods.dev/skills/nonlooped/roblox-suite/roblox-physics"><img src="https://agentmods.dev/badge/skills/nonlooped/roblox-suite/roblox-physics/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/nonlooped/roblox-suite/roblox-physics"><img src="https://agentmods.dev/badge/skills/nonlooped/roblox-suite/roblox-physics.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 | $0.00093 | $0.01949 |
| Opus 5 | $0.00046 | $0.00975 |
| Sonnet 5 | $0.00019 | $0.00390 |
| Haiku 4.5 | $0.00009 | $0.00195 |
Grade A, and why
roblox-physics 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 — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
roblox-physics
Official sources (always check these for the latest):
- https://create.roblox.com/docs/physics
- https://create.roblox.com/docs/physics/assemblies
- https://create.roblox.com/docs/physics/mechanical-constraints
- https://create.roblox.com/docs/physics/mover-constraints
- https://create.roblox.com/docs/physics/network-ownership
- https://create.roblox.com/docs/physics/sleep-system
- https://create.roblox.com/docs/physics/adaptive-timestepping
- https://create.roblox.com/docs/physics/units
- https://create.roblox.com/docs/workspace/collisions
This skill covers the modern constraint-based physics system, not deprecated BodyMover objects. It focuses on building correct, stable, multiplayer-safe mechanisms.
When to use this skill
Activate when:
- Building vehicles, doors, elevators, cranes, swings, suspension, or platforms.
- Moving objects with forces instead of setting
CFrameevery frame. - Tuning stability for complex mechanisms or multiplayer physics.
- Choosing between mechanical and mover constraints.
- Debugging why assemblies sleep, jitter, or behave unexpectedly.
Cross-reference:
- roblox-networking/SKILL.md for network ownership security and server-authoritative validation.
- roblox-core/SKILL.md for services and script locations.
- roblox-testing/SKILL.md for profiling physics with MicroProfiler.
Core concepts
Assemblies
An assembly is one or more parts connected by rigid welds or movable joints, simulated as a single rigid body.
Key BasePart properties (same for any part in the assembly):
AssemblyLinearVelocity/AssemblyAngularVelocity— prefer constraints orApplyImpulseover direct assignment for realistic motion.AssemblyCenterOfMass— force here produces pure linear acceleration.AssemblyMass— sum of all part masses; infinite if any part is anchored.AssemblyRootPart— automatically chosen root for replication and network ownership.
What ships with it
9 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.
- references/collisions-and-filtering.md 1.6 KB
- references/mechanical-constraints.md 3.9 KB
- references/mover-constraints.md 3.8 KB
- references/network-ownership.md 2.5 KB
- references/units-and-physical-properties.md 1.6 KB
- scripts/DoorHinge.lua 2.1 KB
- scripts/PlatformMover.lua 4.3 KB
- scripts/Suspension.lua 1.3 KB
- scripts/VehicleController.lua 6.0 KB
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 First seen · 168 lines · 93 tokens per session scan A 42e881191e9f
roblox-physics is a skill published in the GitHub repository nonlooped/roblox-suite (14 stars, last pushed 6d ago), licensed MIT. It adds 93 tokens to every session and 1,949 once invoked, about $0.0005 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.
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