SPDX license update

examples/RTMultiShadow/closesthit.wgsl

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 // RTMultiShadow closest-hit (runs in SHADE). The multi-light counterpart
 // of RTStress: EVERY light emits its own shadow ray from this single
 // invocation, so several rays for the same pixel resolve in the next SHADE

examples/RTMultiShadow/main.cpp

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 // RTMultiShadow — multi-light shadowing through the wavefront RT pipeline
 // (issue #30). Five pillars on a checkered ground, lit by four colored
 // point lights; the closest-hit emits one shadow ray PER LIGHT from the

examples/RTMultiShadow/miss.wgsl

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 // RTMultiShadow miss (runs in SHADE). Shadow miss → that light is visible
 // from the surface, so add its pending contribution; up to LIGHT_COUNT of
 // these resolve for the same pixel in one pass (atomic rtAccumulate, #30).

examples/RTMultiShadow/project.cpp

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 import std;
 import Crafter.Build;
 namespace fs = std::filesystem;

examples/RTMultiShadow/raygen.wgsl

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 // RTMultiShadow raygen (runs in GENERATE). Host-driven pinhole camera at
 // @group(3) (groups 0..2 are reserved by the wavefront pipeline:
 // 0 = WfParams, 1 = data heaps, 2 = indirect args).

examples/RTMultiShadow/resolve.wgsl

@@ -1,3 +1,6 @@
+//SPDX-License-Identifier: MIT
+//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
+
 // RTMultiShadow RESOLVE-stage tonemap: Reinhard + gamma 2.2 over the
 // linear accumulator. Registered as a WebGPURTStage::Resolve shader.
 fn resolve_main(coord: vec2<u32>, hdr: vec4<f32>) -> vec4<f32> {