refactor: asset-sheet object selection lives on each gallery entry, not in SELECT

Every new showcase piece edited the same SELECT dict at the end of
scripts/asset_sheet.py (its most-changed code file), so concurrent piece
additions collided on one hunk and a separate gate existed only to catch a
forgotten row. Each entry in examples/ and showcase/gallery.json now carries
assetSelect {include, exclude?}; the 102 rows were migrated mechanically and
checked identical to SELECT before it was deleted. check_asset_sheet_select
now requires a compilable assetSelect on every showcase piece and reference
(falsified: a missing one and a bad regex both fail). Generated gallery pages
are unchanged.

Closes #530

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LpkeXRvikhJZSVGBFM91Dv
Signed-off-by: TM Hospitality Strategies <TMHospitalityStrategies@gmail.com>

Author: TMHSDigital

docs/new-example-prompt.md

@@ -159,11 +159,12 @@ proof that the image is good, and neither is the second.
 Asset-sheet gate (required when the subject is a game asset: a prop, kit piece or
 vehicle the example ships as a model): render the hero asset alone (neutral
 three-quarter view, plain studio light, no staging, labels or comparison props)
-beside the pinned asset-quality reference set, whose canonical membership is also in
-`CLAUDE.md` § Quality Gates for Example Runs, with
-`python scripts/asset_sheet.py --blender PATH NAME`. Add the entry's row to that
-script's `SELECT` table first (`tests/check_asset_sheet_select.py` enforces it for
-showcase pieces). Commit the composite under `docs/gallery/asset-sheets/`, link it in
+beside the pinned asset-quality reference set (`scripts/gallery_refs.py`, named in
+`CLAUDE.md` § Quality Gates for Example Runs), with
+`python scripts/asset_sheet.py --blender PATH NAME`. Give the gallery entry an
+`assetSelect` first: `{"include": "<regex>"}` (plus `"exclude"` if needed) on the
+object names that make up the hero asset (`tests/check_asset_sheet_select.py`
+enforces it for showcase pieces). Commit the composite under `docs/gallery/asset-sheets/`, link it in
 the PR body, and report a verdict. The asset ships only if it is not identifiable as
 the least-designed object in the lineup: a strong scene can carry a weak model, and
 this gate removes the scene. Its measurable floors (naming, material variation, edge

examples/gallery.json

@@ -1,5 +1,5 @@
 {
-  "_comment": "FORWARD-COMPATIBLE SOURCE OF TRUTH for the examples gallery. The local page at docs/gallery/index.html is GENERATED from this file by scripts/build_gallery.py -- do not hand-edit the HTML. When the fleet template (Developer-Tools-Directory: site-template/build_site.py + template.html.j2) gains examples support (see ROADMAP: 'Fleet Pages examples support'), it reads this same file and the local page is retired. That migration is a lift-and-shift, not a rewrite: keep this schema stable. Per-entry schema: {name, dir, teaches, witnessesFix, hero, preview, tags?}; hero/preview/dir are repo-root-relative; tags is an optional additive list driving the gallery filter chips. build_gallery.py also emits a detail page per example at docs/gallery/<name>/.",
+  "_comment": "FORWARD-COMPATIBLE SOURCE OF TRUTH for the examples gallery. The local page at docs/gallery/index.html is GENERATED from this file by scripts/build_gallery.py -- do not hand-edit the HTML. When the fleet template (Developer-Tools-Directory: site-template/build_site.py + template.html.j2) gains examples support (see ROADMAP: 'Fleet Pages examples support'), it reads this same file and the local page is retired. That migration is a lift-and-shift, not a rewrite: keep this schema stable. Per-entry schema: {name, dir, teaches, witnessesFix, hero, preview, tags?, assetSelect?}; hero/preview/dir are repo-root-relative; tags is an optional additive list driving the gallery filter chips; assetSelect ({include, exclude?} regexes on object names) tells scripts/asset_sheet.py which objects are the hero asset. build_gallery.py also emits a detail page per example at docs/gallery/<name>/.",
   "title": "Examples and Showcase",
   "description": "Runnable Blender Python examples, each run headless on Blender 5.2 LTS and 4.5 LTS in CI, so every render reflects code that actually runs — shown beside budget-conformance showcase props.",
   "repoBaseUrl": "https://github.com/TMHSDigital/Blender-Developer-Tools/tree/main",
@@ -54,7 +54,10 @@
       "tags": [
         "depsgraph",
         "export"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Gamepad\\."
+      }
     },
     {
       "name": "wave-displace",
@@ -120,7 +123,10 @@
       "tags": [
         "operators",
         "context"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Lantern$"
+      }
     },
     {
       "name": "gn-instance-grid",
@@ -133,7 +139,10 @@
       "tags": [
         "geometry-nodes",
         "instancing"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Macropad\\."
+      }
     },
     {
       "name": "gn-modifier-inputs",
@@ -146,7 +155,10 @@
       "tags": [
         "geometry-nodes",
         "modifiers"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^SpiralStair\\.H3$"
+      }
     },
     {
       "name": "shape-key-blend",
@@ -159,7 +171,10 @@
       "tags": [
         "mesh",
         "shape-keys"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Vase$"
+      }
     },
     {
       "name": "curve-bevel-arc",
@@ -172,7 +187,10 @@
       "tags": [
         "curves",
         "bevel"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^(Magnet|Clip\\w+|PoleBearings)$"
+      }
     },
     {
       "name": "compositor-glare",
@@ -336,7 +354,10 @@
       "tags": [
         "export",
         "uv"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Crate\\.Authored$"
+      }
     },
     {
       "name": "export-preset-axis",
@@ -348,7 +369,10 @@
       "preview": "examples/export-preset-axis/preview.webp",
       "tags": [
         "export"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^RadioMast\\.Unity$"
+      }
     },
     {
       "name": "lod-decimate-chain",
@@ -361,7 +385,10 @@
       "tags": [
         "depsgraph",
         "mesh"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Rocket$"
+      }
     },
     {
       "name": "vertex-weight-limit",
@@ -374,7 +401,10 @@
       "tags": [
         "armature",
         "mesh"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^MechArm$"
+      }
     },
     {
       "name": "triangulate-tangents",
@@ -387,7 +417,10 @@
       "tags": [
         "mesh",
         "uv"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Buckler(\\.Rivets)?$"
+      }
     },
     {
       "name": "gltf-skin-roundtrip",
@@ -400,7 +433,10 @@
       "tags": [
         "export",
         "armature"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^ScorpionAuthored$"
+      }
     },
     {
       "name": "vse-gamma-cross",
@@ -441,7 +477,10 @@
         "bmesh",
         "mesh"
       ],
-      "featured_rank": 5
+      "featured_rank": 5,
+      "assetSelect": {
+        "include": "^(Body|Nut|PumperCap|Lug\\d|SideCap\\d)$"
+      }
     },
     {
       "name": "custom-normals-shade",
@@ -454,7 +493,10 @@
       "tags": [
         "mesh",
         "attributes"
-      ]
+      ],
+      "assetSelect": {
+        "include": "_byangle$"
+      }
     },
     {
       "name": "sky-texture-sun-elevation",
@@ -496,7 +538,10 @@
         "bmesh",
         "mesh",
         "game-pipeline"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Valve\\."
+      }
     },
     {
       "name": "prop-origin-transform",
@@ -510,7 +555,10 @@
         "transforms",
         "parenting",
         "game-pipeline"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^(Pedestal|Conduit)\\.Keep$"
+      }
     },
     {
       "name": "soccer-ball-goldberg",
@@ -538,7 +586,10 @@
         "modifiers",
         "depsgraph"
       ],
-      "featured_rank": 1
+      "featured_rank": 1,
+      "assetSelect": {
+        "include": "^(CarBody|Wheel(Front|Rear)|Headlamp|Taillamp|Grille|DoorMirror|DoorHandle(Front|Rear))$"
+      }
     },
     {
       "name": "attribute-domain-shear",
@@ -566,7 +617,10 @@
         "bmesh",
         "mesh",
         "game-pipeline"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^CaseSafe\\."
+      }
     },
     {
       "name": "modular-kit-snap",
@@ -582,7 +636,11 @@
         "game-pipeline",
         "instancing"
       ],
-      "featured_rank": 8
+      "featured_rank": 8,
+      "assetSelect": {
+        "include": "^Kit\\.CorridorSeg\\.",
+        "exclude": "\\.0\\d\\d$"
+      }
     },
     {
       "name": "lightmap-uv-channel",
@@ -596,7 +654,10 @@
         "uv",
         "game-pipeline",
         "rendering"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Cart\\."
+      }
     },
     {
       "name": "socket-attach-points",
@@ -611,7 +672,10 @@
         "transforms",
         "game-pipeline",
         "instancing"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Drone\\.Survey\\."
+      }
     },
     {
       "name": "vertex-color-ao",
@@ -626,7 +690,10 @@
         "attributes",
         "game-pipeline",
         "rendering"
-      ]
+      ],
+      "assetSelect": {
+        "include": "^Well\\.Stone\\."
+      }
     },
     {
       "name": "cross-version-property-delete",