Roblox Physics
Constraints, VehicleSeat, ragdoll, projectiles, Attachment patterns, network ownership.
Install
$ agentstack add skill-tabooharmony-roblox-brain-roblox-physics ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-tabooharmony-roblox-brain-roblox-physics) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
When to Load
Use this skill when building physics-driven gameplay: vehicles, ragdolls, projectiles, mechanical contraptions, elevators, swinging platforms, or anything using constraints and forces.
Quick Reference
Constraint Types
Mechanical: HingeConstraint (doors/wheels), PrismaticConstraint (elevators/pistons), CylindricalConstraint (telescoping), BallSocketConstraint (ragdoll/chains), UniversalConstraint (steering), WeldConstraint/RigidConstraint (rigid attach) Motion: AlignPosition, AlignOrientation, LinearVelocity, AngularVelocity, VectorForce, Torque Spring/Rope: SpringConstraint (suspension/trampolines), RopeConstraint (grapple, slack), RodConstraint (rigid link)
Attachment Pattern
All constraints connect via Attachment objects, not Parts directly. Create Attachment on each part, set constraint.Attachment0/Attachment1, parent constraint to part0. Actuator types: None, Motor (constant velocity), Servo (target position/angle).
Vehicles
Wheel = HingeConstraint (ActuatorType.Motor) + SpringConstraint for suspension. Steer = Hinge with ActuatorType.Servo. Rear wheels get throttle AngularVelocity, front wheels get servo TargetAngle. Use CustomPhysicalProperties on wheels for friction tuning.
Ragdoll
Replace Motor6Ds with BallSocketConstraint: create Attachments from motor.C0/C1, set LimitsEnabled=true, UpperAngle=45. Keep Root Motor6D for HRP. Set humanoid state to Physics. Re-enable motors to recover.
Network Ownership
Default: nearest player owns unanchored physics (exploitable!). part:SetNetworkOwner(nil) = server-owned (secure, laggy). part:SetNetworkOwner(player) = player-owned (responsive). Rule: NPCs/world objects → server. Vehicles → driver player. Always set explicitly on important physics objects.
Common Gotchas
- Constraints do nothing on Anchored parts
- Both Attachment0 AND Attachment1 required (missing one = silent fail)
- Over-constraining = jitter. Tune mass with
CustomPhysicalProperties - Use Raycast for hitscan,
Touchedonly for slow physics projectiles - Always set lifetime on physics projectiles (forgotten ones kill perf)
Need more detail? Load references/full.md for the complete reference with code examples, API tables, and edge cases.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: TabooHarmony
- Source: TabooHarmony/roblox-brain
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.