MCPInstall

roblox-physics

by tabooharmonyEducation & Science

Use when building or fixing Roblox physics: vehicles, ragdolls, projectiles, elevators, constraints, forces, network ownership.

Installs
1.9K
Last 24h
+44
Trending rank
#3636
Security
Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/tabooharmony/roblox-brain --skill roblox-physics
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads roblox-physics automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Roblox Physics

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, PrismaticConstraint, CylindricalConstraint, BallSocketConstraint, UniversalConstraint, WeldConstraint/RigidConstraint Motion: AlignPosition, AlignOrientation, LinearVelocity, AngularVelocity, VectorForce, Torque Spring/Rope: SpringConstraint, RopeConstraint, RodConstraint

Attachment Pattern

Constraints connect via Attachment objects. Create one on each part, set Attachment0/Attachment1, and parent the constraint to part0. Actuator types include None, Motor, and Servo.

Vehicles

Vehicles: use motorized HingeConstraint wheels, SpringConstraint suspension, servo steering, and CustomPhysicalProperties for friction tuning.

Ragdoll

Track the joints and instances each ragdoll changes; recover only owned state, and coordinate overlapping effects before restoring movement. BallSocketConstraint recipe: full.md.

Authority and Network Ownership

Classic projects: automatic ownership can give an unanchored assembly to a nearby player. SetNetworkOwner(nil) keeps it server-owned; SetNetworkOwner(player) gives a player simulation ownership. Treat player-owned physics as untrusted and validate gameplay outcomes.

Server Authority: set Workspace.AuthorityMode = Server with its required settings. Core objects can remain server-owned while prediction keeps controls responsive, so the classic secure-but-laggy trade-off does not apply. SetNetworkOwner() is not a substitute.

Rule: choose the model first. Keep NPC and gameplay-critical objects authoritative; give client ownership to non-critical physics only when the resulting behavior is acceptable and tested.

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, Touched only for slow physics projectiles
  • Always set a lifetime on physics projectiles See references/full.md for recipes, API details, and checks.

FAQ

What does the roblox-physics skill do?

Use when building or fixing Roblox physics: vehicles, ragdolls, projectiles, elevators, constraints, forces, network ownership.

How do I install roblox-physics?

Run npx skills add https://github.com/tabooharmony/roblox-brain --skill roblox-physics in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/roblox-physics/ (personal) or .claude/skills/roblox-physics/ (project).

Which AI agents can use roblox-physics?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is roblox-physics safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains roblox-physics?

It is published by tabooharmony in tabooharmony/roblox-brain. It has 1,950 recorded installs.

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