Exclude GLB bone display meshes and keep generated payloads external

.gitignore

@@ -68,3 +68,40 @@ launchers/_shared/config.local.sh
 
 # Browser automation scratch
 /.playwright-mcp/
+
+# Fleet size floor: generated payloads stay outside checkouts.
+build/
+builds/
+out/
+output/
+outputs/
+exports/
+dist/
+tmp/
+temp/
+.venv/
+.venv-*/
+node_modules/
+.worktrees/
+worktrees/
+.claude/worktrees/
+runs/
+evidence/
+*.log
+*.zip
+*.7z
+*.rar
+*.iso
+*.chd
+*.bin
+*.mov
+*.wav
+*.psd
+!data/**
+
+# Local compatibility symlinks are files to Git (directory patterns do not match).
+/.playwright-mcp
+/.venv
+/.venvs
+/build
+/outputs

CHANGELOG.md

@@ -26,8 +26,8 @@
 - Robustness fixes for issues #5-#11 (#18): VD offsets are bounded in `vdtool`/`uo_vd_writer`, outfit-lab `vd.py` clips
   runs, `vdtool` prints usage on bad arguments, `jsonio` writes are atomic, `restore()` compares sha256, annotation
   errors are narrowed and warn, and the studio skips an unreadable job status.
-- Issue #12 (portability) is partly done in #18: the `region_fonts` font fallback and `find_blender` discovery. The
-  rest is still open (SM-12).
+- Issue #12 (portability) fixed (#18, #30): the `region_fonts` font fallback, one `find_blender` discovery shared by
+  the tools, and no hardcoded Windows paths (the hardcoded-path test matches backslash and slash).
 
 ### Local servers (security)
 - Content Studio, Fit Lab and the live pose editor bind to the loopback interface only and check `Host` and `Origin`

tests/integration/blender_import_asset_check.py

@@ -0,0 +1,36 @@
+"""A skinned GLB keeps its real mesh but excludes imported bone-display geometry."""
+import ast
+from pathlib import Path
+import tempfile
+
+import bpy
+from mathutils import Vector
+import numpy as np
+
+
+root = Path(__file__).resolve().parents[2]
+tree = ast.parse((root / 'tools/uo-content/blender_build.py').read_text(encoding='utf-8'))
+function = next(node for node in tree.body if isinstance(node, ast.FunctionDef) and node.name == 'import_asset')
+exec(compile(ast.Module(body=[function], type_ignores=[]), 'import_asset', 'exec'))
+
+with tempfile.TemporaryDirectory() as temp:
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    bpy.ops.object.armature_add()
+    rig = bpy.context.object
+    bpy.ops.mesh.primitive_cube_add(size=0.25, location=(0, 0, 2))
+    mesh = bpy.context.object
+    # A legitimate mesh may itself be named Icosphere; filtering by name is wrong.
+    mesh.name = 'Icosphere'
+    mesh.vertex_groups.new(name=rig.data.bones[0].name).add(list(range(8)), 1, 'REPLACE')
+    mesh.modifiers.new('Skin', 'ARMATURE').object = rig
+    mesh.parent = rig
+    path = Path(temp) / 'skinned.glb'
+    bpy.ops.export_scene.gltf(filepath=str(path), export_format='GLB')
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    objects = import_asset(path)
+    assert len(objects) == 1, [obj.name for obj in objects]
+    points = np.array([tuple(objects[0].matrix_world @ vertex.co) for vertex in objects[0].data.vertices])
+    np.testing.assert_allclose(points.min(axis=0), [-0.125, -0.125, 1.875], atol=1e-5)
+    np.testing.assert_allclose(points.max(axis=0), [0.125, 0.125, 2.125], atol=1e-5)
+    assert set(bpy.data.objects) == set(objects)
+print('Skinned GLB imports only supplied geometry; fit bounds preserved.')

tools/uo-content/blender_build.py

@@ -210,7 +210,11 @@ def import_asset(path):
         for o in dst.objects:
             if o: bpy.context.scene.collection.objects.link(o)
     imported=set(bpy.data.objects)-before
-    meshes=[o for o in imported if o.type=='MESH']
+    # glTF import creates mesh custom shapes for its skeleton display. They are
+    # helpers, not supplied geometry, and would corrupt both fit bounds and sprites.
+    bone_shapes={bone.custom_shape for o in imported if o.type=='ARMATURE'
+                 for bone in o.pose.bones if bone.custom_shape is not None}
+    meshes=[o for o in imported if o.type=='MESH' and o not in bone_shapes]
     if not meshes: raise ValueError('No mesh found in supplied asset.')
     dg=bpy.context.evaluated_depsgraph_get()
     # Flatten an imported asset's current shape before binding it to the canonical rig.

workspace/README.md

@@ -1,5 +1,11 @@
 # workspace/
 
+Task 553 moved the existing local payloads into the shared work area's `workspace/`
+directory. This checkout keeps local symbolic links for legacy paths used by the
+editor, pipeline launchers and authoring scripts. The data is stored outside the
+checkout; preserve the links when using those legacy paths. No authoring data was
+deleted. New jobs should use `SPRITEMOTION_WORK_ROOT` directly.
+
 Generated payloads now belong under `SPRITEMOTION_WORK_ROOT` (Windows default:
 `D:/_agentShared/work/spritemotion`); review screenshots, logs and clips belong in
 central evidence runs. New content-studio jobs and checkout-specific Python