Third-person follow camera and platformer jump movement

The recipe

1. Create the avatar entity (project_create_entity) with TransformComponent, a RenderableComponent { "type":"RenderableComponent", "visible":true, "shape":"capsule", "renderSpace":"world" }, and a ColliderComponent (capsule, collision: "solid").
2. Attach CharacterMovementComponent { "type":"CharacterMovementComponent", "enableKcc": true, "maxSpeed": 7, "gravity": 22, "jumpSpeed": 9, "groundY": 0 }. gravity and jumpSpeed are the vertical motor; groundY is the resting floor height.
3. Create a SECOND entity for the camera with its own TransformComponent and a CameraComponent. Set followEntityId to the avatar's entity id and tune followOffset { "x":0, "y":6, "z":10 } (behind and above) and followSmoothing (0..1; higher lags more). Optionally set lookAtEntityId to the avatar so the camera keeps it centered.
4. Bind a jump input: add a boolean action (for example player.jump) to the avatar's InputProfileComponent with policy.effectSystem: "movement" and a keyboard Space binding, following the default profile shape.
5. For platform hazards or moving platforms, give those entities a ColliderComponent (collision: "solid") and, for movers, a NetworkProfileComponent { "type":"NetworkProfileComponent", "interpolation":"smooth" } so remote clients see fluid motion.

Pitfalls

• followSmoothing is clamped 0..1. Values near 1 make the camera feel like it is on a rubber band; 0.1 to 0.2 reads tight. Default is 0.15.
• CharacterMovementComponent has replication policy None: it is authored config consumed identically by client predictor and server authority. Do not expect it to appear in replicated snapshots.
• Do not author VelocityComponent to launch a jump; it is a hidden internal runtime lane. Configure jumpSpeed on movement, or from a script call ctx.physics.command with { type: "launch" }.
• The follow camera must be a different entity from the avatar, or followOffset has nothing to offset from.

Verify

• project_get_graph_snapshot to confirm the camera entity's followEntityId resolves to the avatar id.
• simulation_run to prove the avatar jumps and lands at groundY.
• qa_capture_renderer_viewport to confirm the avatar is framed by the follow camera.