272 lines
8.4 KiB
Markdown
272 lines
8.4 KiB
Markdown
# Initiative: YAZE v0.4.0 - SDL3 Modernization & Emulator Accuracy
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**Created**: 2025-11-23
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**Owner**: Multi-agent coordination
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**Status**: ACTIVE
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**Target Release**: Q1 2026
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---
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## Executive Summary
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YAZE v0.4.0 represents a major release focusing on two pillars:
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1. **Emulator Accuracy** - Implementing cycle-accurate PPU rendering and AI integration
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2. **SDL3 Modernization** - Migrating from SDL2 to SDL3 with backend abstractions
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This initiative coordinates 7 specialized agents across 5 parallel workstreams.
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---
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## Background
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### Current State (v0.3.8-hotfix1)
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- AI agent infrastructure complete (z3ed CLI)
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- Card-based UI system functional
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- Emulator debugging framework established
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- CI/CD pipeline stabilized with nightly testing
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- Known issues: Tile16 palette, overworld sprite movement, emulator audio
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### Uncommitted Work Ready for Integration
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- PPU JIT catch-up system (`ppu.cc` - 29 lines added)
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- Dungeon room sprite encoding/saving (`room.cc` - 82 lines added)
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- Dungeon editor system improvements (133 lines added)
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- Test suite configuration updates
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---
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## Milestones
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### Milestone 1: Emulator Accuracy (Weeks 1-6)
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#### 1.1 PPU JIT Catch-up Completion
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**Agent**: `snes-emulator-expert`
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**Status**: IN_PROGRESS (uncommitted work exists)
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**Files**: `src/app/emu/video/ppu.cc`, `src/app/emu/video/ppu.h`
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**Tasks**:
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- [x] Add `last_rendered_x_` tracking
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- [x] Implement `StartLine()` method
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- [x] Implement `CatchUp(h_pos)` method
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- [ ] Integrate `CatchUp()` calls into `Snes::WriteBBus`
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- [ ] Add unit tests for mid-scanline register writes
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- [ ] Verify with raster-effect test ROMs
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**Success Criteria**: Games with H-IRQ effects (Tales of Phantasia, Star Ocean) render correctly
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#### 1.2 Semantic Inspection API
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**Agent**: `ai-infra-architect`
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**Status**: PLANNED
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**Files**: New `src/app/emu/debug/semantic_introspection.h/cc`
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**Tasks**:
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- [ ] Create `SemanticIntrospectionEngine` class
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- [ ] Connect to `Memory` and `SymbolProvider`
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- [ ] Implement `GetPlayerState()` using ALTTP RAM offsets
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- [ ] Implement `GetSpriteState()` for sprite tracking
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- [ ] Add JSON export for AI consumption
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- [ ] Create debug overlay rendering for vision models
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**Success Criteria**: AI agents can query game state semantically via JSON API
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#### 1.3 State Injection API
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**Agent**: `snes-emulator-expert`
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**Status**: PLANNED
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**Files**: `src/app/emu/emulator.h/cc`, new `src/app/emu/state_patch.h`
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**Tasks**:
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- [ ] Define `GameStatePatch` structure
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- [ ] Implement `Emulator::InjectState(patch)`
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- [ ] Add fast-boot capability (skip intro sequences)
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- [ ] Create ALTTP-specific presets (Dungeon Test, Overworld Test)
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- [ ] Integrate with z3ed CLI for "test sprite" workflow
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**Success Criteria**: Editors can teleport emulator to any game state programmatically
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#### 1.4 Audio System Fix
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**Agent**: `snes-emulator-expert`
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**Status**: PLANNED
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**Files**: `src/app/emu/audio/`, `src/app/emu/apu/`
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**Tasks**:
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- [ ] Diagnose SDL2 audio device initialization
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- [ ] Fix SPC700 → SDL2 format conversion
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- [ ] Verify APU handshake timing
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- [ ] Add audio debugging tools to UI
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- [ ] Test with music playback in ALTTP
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**Success Criteria**: Audio plays correctly during emulation
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---
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### Milestone 2: SDL3 Migration (Weeks 3-8)
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#### 2.1 Directory Restructure
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**Agent**: `backend-infra-engineer`
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**Status**: PLANNED
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**Scope**: Move `src/lib/` + `third_party/` → `external/`
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**Tasks**:
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- [ ] Create `external/` directory structure
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- [ ] Move SDL2 (to be replaced), imgui, etc.
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- [ ] Update CMakeLists.txt references
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- [ ] Update submodule paths
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- [ ] Validate builds on all platforms
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#### 2.2 SDL3 Core Integration
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**Agent**: `imgui-frontend-engineer`
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**Status**: PLANNED
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**Files**: `src/app/platform/`, `CMakeLists.txt`
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**Tasks**:
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- [ ] Add SDL3 as dependency
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- [ ] Create `GraphicsBackend` abstraction interface
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- [ ] Implement SDL3 backend for window/rendering
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- [ ] Update ImGui to SDL3 backend
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- [ ] Port window creation and event handling
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#### 2.3 SDL3 Audio Backend
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**Agent**: `snes-emulator-expert`
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**Status**: PLANNED (after audio fix)
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**Files**: `src/app/emu/audio/sdl3_audio_backend.h/cc`
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**Tasks**:
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- [ ] Implement `IAudioBackend` for SDL3
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- [ ] Migrate audio initialization code
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- [ ] Verify audio quality matches SDL2
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#### 2.4 SDL3 Input Backend
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**Agent**: `imgui-frontend-engineer`
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**Status**: PLANNED
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**Files**: `src/app/emu/ui/input_handler.cc`
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**Tasks**:
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- [ ] Implement SDL3 input backend
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- [ ] Add gamepad support improvements
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- [ ] Verify continuous key polling works
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---
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### Milestone 3: Editor Fixes (Weeks 2-4)
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#### 3.1 Tile16 Palette System Fix
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**Agent**: `zelda3-hacking-expert`
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**Status**: PLANNED
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**Files**: `src/app/editor/graphics/tile16_editor.cc`
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**Tasks**:
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- [ ] Fix Tile8 source canvas palette application
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- [ ] Fix palette button 0-7 switching logic
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- [ ] Ensure color alignment across canvases
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- [ ] Add unit tests for palette operations
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**Success Criteria**: Tile editing workflow fully functional
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#### 3.2 Overworld Sprite Movement
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**Agent**: `zelda3-hacking-expert`
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**Status**: PLANNED
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**Files**: `src/app/editor/overworld/overworld_editor.cc`
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**Tasks**:
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- [ ] Debug canvas interaction system
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- [ ] Fix drag operation handling for sprites
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- [ ] Test sprite placement workflow
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**Success Criteria**: Sprites respond to drag operations
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#### 3.3 Dungeon Sprite Save Integration
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**Agent**: `zelda3-hacking-expert`
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**Status**: IN_PROGRESS (uncommitted)
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**Files**: `src/zelda3/dungeon/room.cc/h`
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**Tasks**:
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- [x] Implement `EncodeSprites()` method
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- [x] Implement `SaveSprites()` method
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- [ ] Integrate with dungeon editor UI
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- [ ] Add unit tests
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- [ ] Commit and verify CI
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---
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## Agent Assignments
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| Agent | Primary Responsibilities | Workstream |
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|-------|-------------------------|------------|
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| `snes-emulator-expert` | PPU catch-up, audio fix, state injection, SDL3 audio | Stream 1 |
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| `imgui-frontend-engineer` | SDL3 core, SDL3 input, UI updates | Stream 2 |
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| `zelda3-hacking-expert` | Tile16 fix, sprite movement, dungeon save | Stream 3 |
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| `ai-infra-architect` | Semantic API, multimodal context | Stream 4 |
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| `backend-infra-engineer` | Directory restructure, CI updates | Stream 2 |
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| `test-infrastructure-expert` | Test suite for new features | Support |
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| `docs-janitor` | Documentation updates | Support |
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---
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## Parallel Workstreams
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```
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Week 1-2:
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├── Stream 1: snes-emulator-expert → Complete PPU catch-up
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├── Stream 3: zelda3-hacking-expert → Tile16 palette fix
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└── Stream 4: ai-infra-architect → Semantic API design
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Week 3-4:
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├── Stream 1: snes-emulator-expert → Audio system fix
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├── Stream 2: backend-infra-engineer → Directory restructure
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├── Stream 3: zelda3-hacking-expert → Sprite movement fix
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└── Stream 4: ai-infra-architect → Semantic API implementation
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Week 5-6:
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├── Stream 1: snes-emulator-expert → State injection API
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├── Stream 2: imgui-frontend-engineer → SDL3 core integration
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└── Stream 3: zelda3-hacking-expert → Dungeon sprite integration
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Week 7-8:
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├── Stream 1: snes-emulator-expert → SDL3 audio backend
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├── Stream 2: imgui-frontend-engineer → SDL3 input backend
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└── All: Integration testing and stabilization
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```
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---
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## Success Criteria
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### v0.4.0 Release Readiness
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- [ ] PPU catch-up renders raster effects correctly
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- [ ] Semantic API provides structured game state
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- [ ] State injection enables "test sprite" workflow
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- [ ] Audio system functional
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- [ ] SDL3 builds pass on Windows, macOS, Linux
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- [ ] No performance regression vs v0.3.x
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- [ ] All known editor bugs fixed
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- [ ] Documentation updated for new APIs
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---
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## Risk Mitigation
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| Risk | Probability | Impact | Mitigation |
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|------|-------------|--------|------------|
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| SDL3 breaking changes | Medium | High | Maintain SDL2 fallback branch |
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| Audio system complexity | High | Medium | Prioritize diagnosis before migration |
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| Cross-platform issues | Medium | Medium | CI validation on all platforms |
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| Agent coordination conflicts | Low | Medium | Strict coordination board protocol |
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---
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## Communication
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- **Daily**: Coordination board updates
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- **Weekly**: Progress sync via initiative status
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- **Blockers**: Post `BLOCKER` tag on coordination board immediately
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- **Handoffs**: Use `REQUEST →` format for task transitions
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---
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## References
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- [Emulator Accuracy Report](emulator_accuracy_report.md)
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- [Roadmap](../roadmaps/roadmap.md)
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- [Feature Parity Analysis](../roadmaps/feature-parity-analysis.md)
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- [Code Review Next Steps](../roadmaps/code-review-critical-next-steps.md)
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- [Coordination Board](coordination-board.md)
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