refactor: remove v2 versioning artifacts, establish Sequence as canonical system

Complete v1→v2 migration cleanup: rename 29 files (sequence_v2→sequence, effect_v2→effect, 14 effect files, 8 shaders, compiler, docs), update all class names and references across 54 files. Archive v1 timeline. System now uses standard naming with all versioning removed. 30/34 tests passing.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/effects/rotating_cube_effect.h b/src/effects/rotating_cube_effect.h
new file mode 100644
index 0000000..1c0155a
--- /dev/null
+++ b/src/effects/rotating_cube_effect.h
@@ -0,0 +1,49 @@
+// This file is part of the 64k demo project.
+// It declares RotatingCubeEffect (simplified v2 port).
+
+#pragma once
+
+#include "gpu/effect.h"
+#include "gpu/gpu.h"
+#include "gpu/uniform_helper.h"
+#include "util/mini_math.h"
+
+class RotatingCubeEffect : public Effect {
+ public:
+  RotatingCubeEffect(const GpuContext& ctx,
+                       const std::vector<std::string>& inputs,
+                       const std::vector<std::string>& outputs);
+  ~RotatingCubeEffect() override;
+
+  void declare_nodes(NodeRegistry& registry) override;
+  void render(WGPUCommandEncoder encoder,
+              const UniformsSequenceParams& params,
+              NodeRegistry& nodes) override;
+
+ private:
+  struct Uniforms {
+    mat4 view_proj;
+    mat4 inv_view_proj;
+    vec4 camera_pos_time;
+    vec4 params;
+    vec2 resolution;
+    float aspect_ratio;
+    float _pad;
+  };
+  static_assert(sizeof(Uniforms) == 176, "Uniforms size mismatch");
+
+  struct ObjectData {
+    mat4 model;
+    mat4 inv_model;
+    vec4 color;
+    vec4 params;
+  };
+  static_assert(sizeof(ObjectData) == 160, "ObjectData size mismatch");
+
+  WGPURenderPipeline pipeline_ = nullptr;
+  WGPUBindGroup bind_group_ = nullptr;
+  GpuBuffer uniform_buffer_;
+  GpuBuffer object_buffer_;
+  float rotation_ = 0.0f;
+  std::string depth_node_;
+};