[JamieW105]

Rotated ramps previously collided as world-aligned boxes, with no friction or live contact notifications. Add translational oriented-box collision and swept collision checks, Coulomb friction, and rotated ray/sphere casts. Friction persists as a backward-compatible part attribute and can be edited through scripts, the Inspector, or agent object updates.

Expose collision enter/stay/exit subscriptions and ground support queries across the scripting SDKs. Ground queries return the support normal, slope angle and whether it meets a caller-selected walking limit. Collision subscriptions use the existing owner-managed event dispatcher; bodies retain unit mass and have no angular dynamics. Overlap/explosion searches still use conservative AABBs. Update engine documentation and agent authoring guidance, and make empty Lua/Luau query results return nil.

Validation:

• 196 local engine play, scripting and world library tests passed, including seven available language adapters and friction, ramp, cast, contact-transition and scene-compatibility regressions.
• Strict Clippy for the editor and changed crates, plus the separate Luau host; editor compile check; Rust formatting.
• Full Linux and Windows workspace tests, rendering checks, application smoke checks, browser export, language adapter conformance and repository checks passed in CI.
• Windows installer built successfully and packaged Setup/toolchain tests passed. Fresh artifact: RusticGameEngine-Setup-0.1.0-x64-20261102-035158.exe, available in the windows-installer artifact on the validation run.