Govern task context and advance execution pointer

docs/status/M16-GAP-00070.md

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+# M16-GAP-00070 Status
+
+status: done
+task: GREASE_PENCIL_VERTEX_WEIGHT_ANGLE modifier LOCAL_EXACT slice
+updated: 2026-08-20 America/New_York
+
+scope: Grease Pencil VERTEX_WEIGHT_ANGLE modifier stack exposure for `object:GreasePencilObject`.
+
+evidence:
+
+- Desktop fixture exposes `Gp Vertex Weight Angle`; save/reopen is exact.
+- Corrected the reader's Blender 5.2 type-name mapping and rebuilt WASM; WASM/Main exposes `GREASE_PENCIL_VERTEX_WEIGHT_ANGLE` on the object scene node.
+- Malformed Blend input is rejected without mutating Main.
+- Generator, npm comparator, and direct comparator exited 0.
+
+knownRisk: Vertex-weight angle deformation evaluation remains blocked; this slice covers metadata and object-stack transport only.
+
+nextTask: `M16-GAP-00071`