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, 0 insertions, 235 deletions

diff --git a/src/gpu/sequence_v2.cc b/src/gpu/sequence_v2.cc
deleted file mode 100644
index 3912849..0000000
--- a/src/gpu/sequence_v2.cc
+++ /dev/null
@@ -1,235 +0,0 @@
-// Sequence v2 implementation
-
-#include "gpu/sequence_v2.h"
-#include "gpu/effect_v2.h"
-#include "util/fatal_error.h"
-#include <algorithm>
-
-// NodeRegistry implementation
-
-NodeRegistry::NodeRegistry(WGPUDevice device, int default_width,
-                           int default_height)
-    : device_(device), default_width_(default_width),
-      default_height_(default_height) {
-  // Create source/sink nodes with actual textures
-  Node source_node = {};
-  source_node.type = NodeType::U8X4_NORM;
-  source_node.width = default_width;
-  source_node.height = default_height;
-  create_texture(source_node);
-  nodes_["source"] = source_node;
-
-  Node sink_node = {};
-  sink_node.type = NodeType::U8X4_NORM;
-  sink_node.width = default_width;
-  sink_node.height = default_height;
-  create_texture(sink_node);
-  nodes_["sink"] = sink_node;
-}
-
-NodeRegistry::~NodeRegistry() {
-  for (auto& [name, node] : nodes_) {
-    if (node.view) {
-      wgpuTextureViewRelease(node.view);
-    }
-    for (auto& mip_view : node.mip_views) {
-      wgpuTextureViewRelease(mip_view);
-    }
-    if (node.texture) {
-      wgpuTextureRelease(node.texture);
-    }
-  }
-}
-
-void NodeRegistry::declare_node(const std::string& name, NodeType type,
-                                 int width, int height) {
-  FATAL_CHECK(nodes_.find(name) == nodes_.end(),
-              "Node already declared: %s\n", name.c_str());
-
-  if (width <= 0)
-    width = default_width_;
-  if (height <= 0)
-    height = default_height_;
-
-  Node node;
-  node.type = type;
-  node.width = width;
-  node.height = height;
-  create_texture(node);
-
-  nodes_[name] = node;
-}
-
-void NodeRegistry::declare_aliased_node(const std::string& name,
-                                        const std::string& alias_of) {
-  FATAL_CHECK(nodes_.find(alias_of) != nodes_.end(),
-              "Alias target does not exist: %s\n", alias_of.c_str());
-  FATAL_CHECK(aliases_.find(name) == aliases_.end(), "Alias already exists: %s\n",
-              name.c_str());
-
-  aliases_[name] = alias_of;
-}
-
-WGPUTextureView NodeRegistry::get_view(const std::string& name) {
-  // Check aliases first
-  auto alias_it = aliases_.find(name);
-  if (alias_it != aliases_.end()) {
-    return get_view(alias_it->second);
-  }
-
-  auto it = nodes_.find(name);
-  FATAL_CHECK(it != nodes_.end(), "Node not found: %s\n", name.c_str());
-  return it->second.view;
-}
-
-std::vector<WGPUTextureView>
-NodeRegistry::get_output_views(const std::vector<std::string>& names) {
-  std::vector<WGPUTextureView> views;
-  views.reserve(names.size());
-  for (const auto& name : names) {
-    views.push_back(get_view(name));
-  }
-  return views;
-}
-
-void NodeRegistry::resize(int width, int height) {
-  default_width_ = width;
-  default_height_ = height;
-
-  for (auto& [name, node] : nodes_) {
-    // Release old texture
-    if (node.view) {
-      wgpuTextureViewRelease(node.view);
-    }
-    for (auto& mip_view : node.mip_views) {
-      wgpuTextureViewRelease(mip_view);
-    }
-    if (node.texture) {
-      wgpuTextureRelease(node.texture);
-    }
-
-    // Recreate with new dimensions
-    node.width = width;
-    node.height = height;
-    create_texture(node);
-  }
-}
-
-bool NodeRegistry::has_node(const std::string& name) const {
-  return nodes_.find(name) != nodes_.end() ||
-         aliases_.find(name) != aliases_.end();
-}
-
-void NodeRegistry::set_external_view(const std::string& name,
-                                      WGPUTextureView view) {
-  // Register external view (texture not owned by registry)
-  Node node = {};
-  node.view = view;
-  node.texture = nullptr; // Not owned
-  nodes_[name] = node;
-}
-
-void NodeRegistry::create_texture(Node& node) {
-  WGPUTextureFormat format;
-  WGPUTextureUsage usage;
-
-  switch (node.type) {
-  case NodeType::U8X4_NORM:
-    format = WGPUTextureFormat_RGBA8Unorm;
-    usage = WGPUTextureUsage_RenderAttachment | WGPUTextureUsage_TextureBinding;
-    break;
-  case NodeType::F32X4:
-    format = WGPUTextureFormat_RGBA32Float;
-    usage = WGPUTextureUsage_RenderAttachment | WGPUTextureUsage_TextureBinding;
-    break;
-  case NodeType::F16X8:
-    format = WGPUTextureFormat_RGBA16Float; // WebGPU doesn't have 8-channel, use RGBA16
-    usage = WGPUTextureUsage_RenderAttachment | WGPUTextureUsage_TextureBinding;
-    break;
-  case NodeType::DEPTH24:
-    format = WGPUTextureFormat_Depth24Plus;
-    usage = WGPUTextureUsage_RenderAttachment;
-    break;
-  case NodeType::COMPUTE_F32:
-    format = WGPUTextureFormat_RGBA32Float;
-    usage = WGPUTextureUsage_StorageBinding | WGPUTextureUsage_TextureBinding;
-    break;
-  }
-
-  WGPUTextureDescriptor desc = {};
-  desc.usage = usage;
-  desc.dimension = WGPUTextureDimension_2D;
-  desc.size = {static_cast<unsigned int>(node.width),
-               static_cast<unsigned int>(node.height), 1};
-  desc.format = format;
-  desc.mipLevelCount = 1;
-  desc.sampleCount = 1;
-
-  node.texture = wgpuDeviceCreateTexture(device_, &desc);
-  FATAL_CHECK(node.texture != nullptr, "Failed to create texture\n");
-
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = format;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.baseMipLevel = 0;
-  view_desc.mipLevelCount = 1;
-  view_desc.baseArrayLayer = 0;
-  view_desc.arrayLayerCount = 1;
-  view_desc.aspect = (node.type == NodeType::DEPTH24)
-                         ? WGPUTextureAspect_DepthOnly
-                         : WGPUTextureAspect_All;
-
-  node.view = wgpuTextureCreateView(node.texture, &view_desc);
-  FATAL_CHECK(node.view != nullptr, "Failed to create texture view\n");
-}
-
-// SequenceV2 implementation
-
-SequenceV2::SequenceV2(const GpuContext& ctx, int width, int height)
-    : ctx_(ctx), width_(width), height_(height),
-      nodes_(ctx.device, width, height) {
-  uniforms_buffer_.init(ctx.device);
-}
-
-void SequenceV2::preprocess(float seq_time, float beat_time, float beat_phase,
-                            float audio_intensity) {
-  params_.resolution = {static_cast<float>(width_), static_cast<float>(height_)};
-  params_.aspect_ratio =
-      static_cast<float>(width_) / static_cast<float>(height_);
-  params_.time = seq_time;
-  params_.beat_time = beat_time;
-  params_.beat_phase = beat_phase;
-  params_.audio_intensity = audio_intensity;
-  params_._pad = 0.0f;
-
-  uniforms_buffer_.update(ctx_.queue, params_);
-}
-
-void SequenceV2::postprocess(WGPUCommandEncoder encoder) {
-  (void)encoder;
-  // Default: No-op (last effect writes to sink directly)
-}
-
-void SequenceV2::render_effects(WGPUCommandEncoder encoder) {
-  // Execute DAG in topological order (pre-sorted by compiler)
-  for (const auto& dag_node : effect_dag_) {
-    dag_node.effect->render(encoder, params_, nodes_);
-  }
-}
-
-void SequenceV2::resize(int width, int height) {
-  width_ = width;
-  height_ = height;
-  nodes_.resize(width, height);
-
-  // Notify effects
-  for (auto& dag_node : effect_dag_) {
-    dag_node.effect->resize(width, height);
-  }
-}
-
-void SequenceV2::init_effect_nodes() {
-  for (auto& dag_node : effect_dag_) {
-    dag_node.effect->declare_nodes(nodes_);
-  }
-}