feat(wiki): ingest nexus-spatial-discovery — 8-agent product discovery exercise

Ingest raw/Agent/agency-agents/examples/nexus-spatial-discovery.md
Source: 8 The Agency agents parallel discovery exercise for Nexus Spatial
Products: AI spatial command center (SpatialAIOps category)
Key findings: 2D-first/WebXR strategy, debugging as killer use case

Entities created: Nexus-Spatial, CrewAI
Concepts created: SpatialAIOps, Command-Theater-Interface,
  Debugging-Visualization, Semantic-Zoom, Growth-Loop

wiki/concepts/Command-Theater-Interface.md

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+---
+title: "Command Theater Interface"
+type: concept
+tags: [spatial-computing, xr, interface-design, ux]
+last_updated: 2026-03-05
+---
+
+## Definition
+
+命令剧院（Command Theater）——以用户为中心的空间界面布局范式，以弧形剧场形式围绕用户组织内容。源自 [[nexus-spatial-discovery]] 中 [[XR-Interface-Architect]] 的设计。
+
+## Architecture
+
+```
+                        OVERVIEW CANOPY
+                     (pipeline topology)
+                    ~~~~~~~~~~~~~~~~~~~~~~~~
+                   /                        \
+                  /     FOCUS ARC (120 deg)   \
+                 /    primary node graph work   \
+                /________________________________\
+               |                                  |
+    LEFT       |        USER POSITION             |       RIGHT
+    UTILITY    |        (origin 0,0,0)            |       UTILITY
+    RAIL       |                                  |       RAIL
+               |__________________________________|
+                \                                /
+                 \      SHELF (below sightline) /
+                  \   agent status, quick tools/
+                   \_________________________ /
+```
+
+## Four Zones
+
+| Zone | Position | Content |
+|------|----------|---------|
+| Focus Arc | 120°, 1.2-2.0m | Primary node graph workspace |
+| Overview Canopy | above, 2.5-4.0m | Miniature pipeline topology + health heatmap |
+| Utility Rails | left/right flanks | Agent library, monitoring, logs |
+| Shelf | below sightline, 0.8-1.0m | Run/stop, undo/redo, quick tools |
+
+## Three-Layer Depth System
+
+| Layer | Depth | Content | Opacity |
+|-------|-------|---------|---------|
+| Foreground | 0.8-1.2m | Active panels, inspectors, modals | 100% |
+| Midground | 1.2-2.5m | Node graph, connections, workspace | 100% |
+| Background | 2.5-5.0m | Overview map, ambient status | 40-70% |
+
+## Design Rationale
+
+- 用户处于中心，信息按重要性和使用频率分层
+- z-axis（深度）对应执行顺序：input nodes 最远，output nodes 最近
+- 减少晕动症：所有交互发生在 0.8-2.5m 范围
+- 与 [[Semantic-Zoom]] 配合实现渐进式空间复杂度
+
+## Related Concepts
+
+- [[Semantic-Zoom]]：与 Command Theater 配合的导航范式
+- [[SpatialAIOps]]：Command Theater 的应用场景
+- [[Nexus-Spatial]]：Command Theater 的产品实现