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>

6 files changed, 42 insertions, 41 deletions

diff --git a/cmake/DemoCodegen.cmake b/cmake/DemoCodegen.cmake
index e84e17b..1e0badf 100644
--- a/cmake/DemoCodegen.cmake
+++ b/cmake/DemoCodegen.cmake
@@ -119,16 +119,16 @@ endfunction()
 # Generation Targets
 # =============================================================================
 
-# Timeline compilation (v2)
+# Timeline compilation
 set(DEMO_SEQ_PATH ${WORKSPACE_TIMELINE})
 set(GENERATED_TIMELINE_CC ${CMAKE_CURRENT_SOURCE_DIR}/src/generated/timeline.cc)
 add_custom_command(
     OUTPUT ${GENERATED_TIMELINE_CC}
     COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_SOURCE_DIR}/src/generated
-    COMMAND ${SEQ_COMPILER_V2_CMD} ${DEMO_SEQ_PATH} --output ${GENERATED_TIMELINE_CC}
-    DEPENDS ${SEQ_COMPILER_V2_DEPENDS} ${DEMO_SEQ_PATH}
+    COMMAND ${SEQ_COMPILER_CMD} ${DEMO_SEQ_PATH} --output ${GENERATED_TIMELINE_CC}
+    DEPENDS ${SEQ_COMPILER_DEPENDS} ${DEMO_SEQ_PATH}
             src/gpu/demo_effects.h
-    COMMENT "Compiling v2 demo sequence from workspace ${DEMO_WORKSPACE}..."
+    COMMENT "Compiling demo sequence from workspace ${DEMO_WORKSPACE}..."
 )
 add_custom_target(generate_timeline ALL DEPENDS ${GENERATED_TIMELINE_CC})
 
diff --git a/cmake/DemoExecutables.cmake b/cmake/DemoExecutables.cmake
index 5131936..69e4a30 100644
--- a/cmake/DemoExecutables.cmake
+++ b/cmake/DemoExecutables.cmake
@@ -47,16 +47,16 @@ endif()
 # test_demo - Audio/Visual Sync Tool
 # =============================================================================
 
-# Timeline generation (v2)
+# Timeline generation
 set(TEST_DEMO_SEQ_PATH ${CMAKE_CURRENT_SOURCE_DIR}/tools/test_demo.seq)
 set(GENERATED_TEST_DEMO_TIMELINE_CC ${CMAKE_CURRENT_SOURCE_DIR}/src/generated/test_timeline.cc)
 add_custom_command(
     OUTPUT ${GENERATED_TEST_DEMO_TIMELINE_CC}
     COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_SOURCE_DIR}/src/generated
-    COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/tools/seq_compiler_v2.py
+    COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/tools/seq_compiler.py
             ${TEST_DEMO_SEQ_PATH} --output ${GENERATED_TEST_DEMO_TIMELINE_CC}
     DEPENDS ${TEST_DEMO_SEQ_PATH}
-    COMMENT "Compiling test_demo sequence (v2)..."
+    COMMENT "Compiling test_demo sequence..."
 )
 add_custom_target(generate_test_demo_timeline ALL DEPENDS ${GENERATED_TEST_DEMO_TIMELINE_CC})
 
@@ -75,7 +75,7 @@ add_custom_target(generate_test_demo_music ALL DEPENDS ${GENERATED_TEST_DEMO_MUS
 # Mark test_demo generated files as GENERATED
 set_source_files_properties(${GENERATED_TEST_DEMO_TIMELINE_CC} PROPERTIES GENERATED TRUE)
 set_source_files_properties(${GENERATED_TEST_DEMO_MUSIC_CC} PROPERTIES GENERATED TRUE)
-set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/src/generated/test_timeline_v2.h PROPERTIES GENERATED TRUE)
+set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/src/generated/test_timeline.h PROPERTIES GENERATED TRUE)
 
 # Build executable (uses main demo assets)
 if(NOT DEMO_STRIP_EXTERNAL_LIBS)
diff --git a/cmake/DemoSourceLists.cmake b/cmake/DemoSourceLists.cmake
index f142ce1..65f3518 100644
--- a/cmake/DemoSourceLists.cmake
+++ b/cmake/DemoSourceLists.cmake
@@ -28,15 +28,15 @@ set(UTIL_SOURCES src/util/asset_manager.cc src/util/file_watcher.cc)
 
 # Common effect sources (shared between headless and normal modes)
 set(COMMON_GPU_EFFECTS
-    src/gpu/sequence_v2.cc
-    src/gpu/effect_v2.cc
-    src/effects/passthrough_effect_v2.cc
-    src/effects/placeholder_effect_v2.cc
-    src/effects/gaussian_blur_effect_v2.cc
-    src/effects/heptagon_effect_v2.cc
-    src/effects/particles_effect_v2.cc
-    src/effects/rotating_cube_effect_v2.cc
-    src/effects/hybrid3_d_effect_v2.cc
+    src/gpu/sequence.cc
+    src/gpu/effect.cc
+    src/effects/passthrough_effect.cc
+    src/effects/placeholder_effect.cc
+    src/effects/gaussian_blur_effect.cc
+    src/effects/heptagon_effect.cc
+    src/effects/particles_effect.cc
+    src/effects/rotating_cube_effect.cc
+    src/effects/hybrid3_d_effect.cc
     # TODO: Port CNN effects to v2 (complex v1 dependencies)
     # cnn_v1/src/cnn_v1_effect.cc
     # cnn_v2/src/cnn_v2_effect.cc
diff --git a/cmake/DemoTests.cmake b/cmake/DemoTests.cmake
index a23202a..b24d9e2 100644
--- a/cmake/DemoTests.cmake
+++ b/cmake/DemoTests.cmake
@@ -97,10 +97,11 @@ target_link_libraries(test_assets PRIVATE util procedural ${DEMO_LIBS})
 demo_add_asset_deps(test_assets test)
 set_source_files_properties(src/tests/assets/test_assets.cc PROPERTIES COMPILE_DEFINITIONS "USE_TEST_ASSETS")
 
-add_demo_test(test_sequence SequenceSystemTest assets src/tests/assets/test_sequence.cc ${GEN_DEMO_CC} ${GENERATED_TIMELINE_CC} ${PLATFORM_SOURCES})
-target_link_libraries(test_sequence PRIVATE 3d gpu util procedural ${DEMO_LIBS})
-demo_add_asset_deps(test_sequence all)
-add_dependencies(test_sequence generate_timeline)
+# Disabled: Old v1 sequence system test
+# add_demo_test(test_sequence SequenceSystemTest assets src/tests/assets/test_sequence.cc ${GEN_DEMO_CC} ${GENERATED_TIMELINE_CC} ${PLATFORM_SOURCES})
+# target_link_libraries(test_sequence PRIVATE 3d gpu util procedural ${DEMO_LIBS})
+# demo_add_asset_deps(test_sequence all)
+# add_dependencies(test_sequence generate_timeline)
 
 add_demo_test(test_procedural ProceduralGenTest util src/tests/util/test_procedural.cc)
 target_link_libraries(test_procedural PRIVATE procedural ${DEMO_LIBS})
@@ -230,23 +231,23 @@ add_demo_test(test_gpu_composite GpuCompositeTest gpu
 target_link_libraries(test_gpu_composite PRIVATE 3d gpu audio procedural util ${DEMO_LIBS})
 demo_add_asset_deps(test_gpu_composite shaders)
 
-# Sequence v2 Test (Foundation)
-add_demo_test(test_sequence_v2 SequenceV2Test gpu
-    src/tests/gpu/test_sequence_v2.cc
+# Sequence Test (Foundation)
+add_demo_test(test_sequence SequenceTest gpu
+    src/tests/gpu/test_sequence.cc
     src/tests/common/webgpu_test_fixture.cc
     ${PLATFORM_SOURCES}
     ${GEN_DEMO_CC})
-target_link_libraries(test_sequence_v2 PRIVATE 3d gpu audio procedural util ${DEMO_LIBS})
-demo_add_asset_deps(test_sequence_v2 shaders)
+target_link_libraries(test_sequence PRIVATE 3d gpu audio procedural util ${DEMO_LIBS})
+demo_add_asset_deps(test_sequence shaders)
 
-# Sequence v2 End-to-End Test
-add_demo_test(test_sequence_v2_e2e SequenceV2E2ETest gpu
-    src/tests/gpu/test_sequence_v2_e2e.cc
+# Sequence End-to-End Test
+add_demo_test(test_sequence_e2e SequenceE2ETest gpu
+    src/tests/gpu/test_sequence_e2e.cc
     src/tests/common/webgpu_test_fixture.cc
     ${PLATFORM_SOURCES}
     ${GEN_DEMO_CC})
-target_link_libraries(test_sequence_v2_e2e PRIVATE 3d gpu audio procedural util ${DEMO_LIBS})
-demo_add_asset_deps(test_sequence_v2_e2e shaders)
+target_link_libraries(test_sequence_e2e PRIVATE 3d gpu audio procedural util ${DEMO_LIBS})
+demo_add_asset_deps(test_sequence_e2e shaders)
 
 # Subsystem test targets
 add_custom_target(run_audio_tests
diff --git a/cmake/DemoTools.cmake b/cmake/DemoTools.cmake
index f3a9470..43c4716 100644
--- a/cmake/DemoTools.cmake
+++ b/cmake/DemoTools.cmake
@@ -24,9 +24,9 @@ else()
 endif()
 
 # Sequence compiler tool (v2 - Python)
-set(SEQ_COMPILER_V2_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/tools/seq_compiler_v2.py)
-set(SEQ_COMPILER_V2_CMD ${CMAKE_COMMAND} -E env python3 ${SEQ_COMPILER_V2_SCRIPT})
-set(SEQ_COMPILER_V2_DEPENDS ${SEQ_COMPILER_V2_SCRIPT})
+set(SEQ_COMPILER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/tools/seq_compiler.py)
+set(SEQ_COMPILER_CMD ${CMAKE_COMMAND} -E env python3 ${SEQ_COMPILER_SCRIPT})
+set(SEQ_COMPILER_DEPENDS ${SEQ_COMPILER_SCRIPT})
 
 # Tracker compiler tool
 if(DEFINED TRACKER_COMPILER_PATH)
diff --git a/cmake/Validation.cmake b/cmake/Validation.cmake
index ee150f4..b4a3784 100644
--- a/cmake/Validation.cmake
+++ b/cmake/Validation.cmake
@@ -14,13 +14,13 @@ file(GLOB WGSL_FILES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE
 set(VALIDATION_CPP_FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/src/gpu/post_process_helper.h
     ${CMAKE_CURRENT_SOURCE_DIR}/src/gpu/demo_effects.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/heptagon_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/gaussian_blur_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/passthrough_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/placeholder_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/particles_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/rotating_cube_effect_v2.cc
-    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/hybrid3_d_effect_v2.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/heptagon_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/gaussian_blur_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/passthrough_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/placeholder_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/particles_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/rotating_cube_effect.cc
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/effects/hybrid3_d_effect.cc
 )
 
 # Add custom command to run the validator