git:20260721.fbbc1f5 to git:20260827.49e0612

5 added, 5 removed. Audit A to A.

---

name: using-cesiumjs-skills

- description: Use when starting any conversation involving CesiumJS development - provides orientation on available domain skills and how they activate

+ description: Use when a conversation begins with a CesiumJS development request - maps the 14 domain skills on offer and explains how passive activation selects between them

---

# CesiumJS Skills Orientation

- This plugin provides 14 domain skills covering CesiumJS v1.143 (~551 public symbols). Skills activate passively via description matching — no explicit invocation is required.

+ This plugin provides 14 domain skills covering CesiumJS v1.144 (~563 public symbols). Skills activate passively via description matching — no explicit invocation is required.

## Available Skills

| Skill | Use when... |

|---|---|

| `cesiumjs-viewer-setup` | Initializing a CesiumJS app, configuring widgets, setting Ion tokens, bootstrapping a globe |

- | `cesiumjs-camera` | Positioning the camera, flyTo animations, constraining navigation, entity tracking |

+ | `cesiumjs-camera` | Positioning the camera, flyTo animations, constraining navigation, custom camera controllers, entity tracking |

| `cesiumjs-entities` | Adding points/labels/models/polygons and segmented paths, loading GeoJSON/KML/CZML/GPX through DataSources |

| `cesiumjs-3d-tiles` | Loading tilesets, compressed/CAD glTF content, MVT, metadata, voxels, point clouds, and clipping |

| `cesiumjs-imagery` | Adding/swapping base map layers, configuring imagery providers, split-screen comparisons |

| `cesiumjs-terrain-environment` | Configuring terrain, querying heights, atmosphere/sky/fog/lighting/shadows, panoramas |

| `cesiumjs-primitives` | Performance-critical static geometry, custom shapes, batching, BufferPrimitive collections, GeoJsonPrimitive |

| `cesiumjs-materials-shaders` | Fabric materials, ImageBasedLighting, post-processing effects, bloom, tonemapping |

| `cesiumjs-custom-shader` | Writing GLSL shader bodies for Model/Cesium3DTileset/VoxelPrimitive; reading feature IDs or structural metadata inside a shader |

| `cesiumjs-time-properties` | Time-dynamic attributes, simulation clocks, interpolation, and interval/sampled path materials |

| `cesiumjs-spatial-math` | Coordinate conversions, ellipsoid geometry, model matrices, intersection tests, projections |

- | `cesiumjs-interaction` | User clicks on the globe, multi-modifier input actions, entity/feature selection, hover effects, drag interactions |

+ | `cesiumjs-interaction` | User clicks on the globe, multi-modifier input actions, entity/feature selection, edge-snap picking, hover effects, drag interactions |

| `cesiumjs-models-particles` | glTF/GLB loading, KHR meshopt compression, CAD display extensions, animations, and particles |

| `cesiumjs-core-utilities` | HTTP requests via Resource, Color, Event, error handling, helper functions |

## Cross-Domain Questions

- When a question spans multiple domains, consult `docs/DOMAINS.md` — the definitive ownership map assigning every public CesiumJS class, function, and enum to exactly one skill.

+ When a question spans multiple domains, consult `wiki/Domain-Mapping.md` — the definitive ownership map assigning every public CesiumJS class, function, and enum to exactly one skill.

## Runtime Verification

Chrome DevTools MCP is available for browser-based iteration: console error checking, network inspection, screenshots, and Lighthouse audits.