fix: driver_namespace id_type and SDF-grid meshing in skills

[TMHSDigital]

Summary

Two in-Blender findings from executing the content on 4.5.10 LTS and 5.1.1, both reproduced and both fixes verified on both builds.

F1 — driver_namespace example raised TypeError (fix)

skills/drivers-and-app-handlers/SKILL.md: the worked example did var.targets[0].id = bpy.context.scene without first setting id_type='SCENE'. A SINGLE_PROP target id pointer defaults to OBJECT, so the assignment raised TypeError: DriverTarget.id expected a Object type, not Scene on both versions.

• Repro (both): RAISES: TypeError: ... DriverTarget.id expected a Object type, not Scene
• Fix: add var.targets[0].id_type = 'SCENE' before the id = line (matching the already-correct snippet driver-with-custom-function.py L28); also clarified the SINGLE_PROP prose.
• Post-fix (both): driver attaches and location.z evaluates to [0.0, 2.425, 4.9985] across frames 1/50/100.

F2 — SDF-remesh example produced 0 vertices (diagnosed, then fixed)

skills/geometry-nodes-python/SKILL.md: build_remesh_via_sdf wired MeshToSDFGrid → VolumeToMesh.

• Diagnosis (not a parameter bug): MeshToSDFGrid.outputs["SDF Grid"] is a grid/float socket (type=VALUE, NodeSocketFloat); VolumeToMesh.inputs["Volume"] is NodeSocketGeometry. The link is is_valid=False — incompatible socket types — so VolumeToMesh gets no data and emits 0 verts at every Voxel Size / Band Width / Threshold combination on both builds. Control: MeshToVolume → VolumeToMesh is is_valid=True and meshes fine (8216/7778 verts), confirming VolumeToMesh is for volume geometry, not bare grids.
• Correct node: GeometryNodeGridToMesh ("Grid to Mesh") — IN=['Grid','Threshold','Adaptivity'] OUT=['Mesh'], Grid input type-compatible with the SDF grid output.
• Fix: switch to GridToMesh, wire SDF Grid → Grid, default threshold=0.0 (SDF zero-level); updated heading + node-reference table.
• Post-fix (both): cube remesh yields 10088 verts (5.1.1) / 9602 (4.5.10), zrange (-1.0, 1.0) (the cube spans ±1).

Constraints

Counts unchanged (12/6/2/17). No edits to CHANGELOG / CLAUDE **Version:** / ROADMAP **Current:**. standards-version stays 1.10.0. CLAUDE.md untouched (no context-mode block). Both commits signed (-s). Per known release.yml behavior this fix: will cut a patch.

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