From 2bb503ae40309343ac5283284a30875affa44adb Mon Sep 17 00:00:00 2001 From: "j.foucher" Date: Thu, 19 Feb 2026 13:15:24 +0100 Subject: [PATCH] Add session log for 2026-02-19 Full record of everything done in today's session: plugin creation, compile fixes, documentation (Markdown + PowerPoint), git history, technical decisions made, and next steps. Co-Authored-By: Claude Sonnet 4.6 --- .claude/session_log_2026-02-19.md | 128 ++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 .claude/session_log_2026-02-19.md diff --git a/.claude/session_log_2026-02-19.md b/.claude/session_log_2026-02-19.md new file mode 100644 index 0000000..8079f0d --- /dev/null +++ b/.claude/session_log_2026-02-19.md @@ -0,0 +1,128 @@ +# Session Log — 2026-02-19 + +**Project**: PS_AI_Agent (Unreal Engine 5.5) +**Machine**: Desktop PC (j_foucher) +**Working directory**: `E:\ASTERION\GIT\PS_AI_Agent` + +--- + +## Conversation Summary + +### 1. Initial Request +User asked to create a plugin to use the ElevenLabs Conversational AI Agent in UE5.5. +Reference: existing Convai plugin (gRPC-based, more complex). Goal: simpler version using ElevenLabs. +Plugin name requested: `PS_AI_Agent_ElevenLabs`. + +### 2. Codebase Exploration +Explored the Convai plugin source at `ConvAI/Convai/` to understand: +- Module/settings structure +- AudioCapture patterns +- HTTP proxy pattern +- gRPC streaming architecture (to know what to replace with WebSocket) +- Convai already had `EVoiceType::ElevenLabsVoices` — confirming the direction + +### 3. Plugin Created +All source files written from scratch under: +`Unreal/PS_AI_Agent/Plugins/PS_AI_Agent_ElevenLabs/` + +Files created: +- `PS_AI_Agent_ElevenLabs.uplugin` +- `PS_AI_Agent_ElevenLabs.Build.cs` +- `Public/PS_AI_Agent_ElevenLabs.h` — Module + `UElevenLabsSettings` +- `Public/ElevenLabsDefinitions.h` — Enums, structs, protocol constants +- `Public/ElevenLabsWebSocketProxy.h` + `.cpp` — WS session manager +- `Public/ElevenLabsConversationalAgentComponent.h` + `.cpp` — Main NPC component +- `Public/ElevenLabsMicrophoneCaptureComponent.h` + `.cpp` — Mic capture +- `PS_AI_Agent.uproject` — Plugin registered + +Commit: `f0055e8` + +### 4. Memory Files Created +To allow context recovery on any machine (including laptop): +- `.claude/MEMORY.md` — project structure + patterns (auto-loaded by Claude Code) +- `.claude/elevenlabs_plugin.md` — plugin file map + API protocol details +- `.claude/project_context.md` — original ask, intent, short/long-term goals +- Local copy also at `C:\Users\j_foucher\.claude\projects\...\memory\` + +Commit: `f0055e8` (with plugin), updated in `4d6ae10` + +### 5. .gitignore Updated +Added to existing ignores: +- `Unreal/PS_AI_Agent/Plugins/*/Binaries/` +- `Unreal/PS_AI_Agent/Plugins/*/Intermediate/` +- `Unreal/PS_AI_Agent/*.sln` / `*.suo` +- `.claude/settings.local.json` +- `generate_pptx.py` + +Commit: `4d6ae10`, `b114ab0` + +### 6. Compile — First Attempt (Errors Found) +Ran `Build.bat PS_AI_AgentEditor Win64 Development`. Errors: +- `WebSockets` listed in `.uplugin` — it's a module not a plugin → removed +- `OpenDefaultCaptureStream` doesn't exist in UE 5.5 → use `OpenAudioCaptureStream` +- `FOnAudioCaptureFunction` callback uses `const void*` not `const float*` → fixed cast +- `TArray::RemoveAt(0, N, false)` deprecated → use `EAllowShrinking::No` +- `AudioCapture` is a plugin and must be in `.uplugin` Plugins array → added + +Commit: `bb1a857` + +### 7. Compile — Success +Clean build, no warnings, no errors. +Output: `Plugins/PS_AI_Agent_ElevenLabs/Binaries/Win64/UnrealEditor-PS_AI_Agent_ElevenLabs.dll` + +Memory updated with confirmed UE 5.5 API patterns. Commit: `3b98edc` + +### 8. Documentation — Markdown +Full reference doc written to `.claude/PS_AI_Agent_ElevenLabs_Documentation.md`: +- Installation, Project Settings, Quick Start (BP + C++), Components Reference, + Data Types, Turn Modes, Security/Signed URL, Audio Pipeline, Common Patterns, Troubleshooting. + +Commit: `c833ccd` + +### 9. Documentation — PowerPoint +20-slide dark-themed PowerPoint generated via Python (python-pptx 1.0.2): +- File: `PS_AI_Agent_ElevenLabs_Documentation.pptx` in repo root +- Covers all sections with visual layout, code blocks, flow diagrams, colour-coded elements +- Generator script `generate_pptx.py` excluded from git via .gitignore + +Commit: `1b72026` + +--- + +## Git History (this session) + +| Hash | Message | +|------|---------| +| `f0055e8` | Add PS_AI_Agent_ElevenLabs plugin (initial implementation) | +| `4d6ae10` | Update .gitignore: exclude plugin build artifacts and local Claude settings | +| `b114ab0` | Broaden .gitignore: use glob for all plugin Binaries/Intermediate | +| `bb1a857` | Fix compile errors in PS_AI_Agent_ElevenLabs plugin | +| `3b98edc` | Update memory: document confirmed UE 5.5 API patterns and plugin compile status | +| `c833ccd` | Add plugin documentation for PS_AI_Agent_ElevenLabs | +| `1b72026` | Add PowerPoint documentation and update .gitignore | + +--- + +## Key Technical Decisions Made This Session + +| Decision | Reason | +|----------|--------| +| WebSocket instead of gRPC | ElevenLabs Conversational AI uses WS/JSON; no ThirdParty libs needed | +| `AudioCapture` in `.uplugin` Plugins array | It's an engine plugin, not a module — UBT requires it declared | +| `WebSockets` in Build.cs only | It's a module (no `.uplugin` file), declaring it in `.uplugin` causes build error | +| `FOnAudioCaptureFunction` uses `const void*` | UE 5.3+ API change — must cast to `float*` inside callback | +| `EAllowShrinking::No` | Bool overload of `RemoveAt` deprecated in UE 5.5 | +| `USoundWaveProcedural` for playback | Allows pushing raw PCM bytes at runtime without file I/O | +| Silence threshold = 30 ticks | ~0.5s at 60fps heuristic to detect agent finished speaking | + +--- + +## Next Steps (not done yet) + +- [ ] Open in UE 5.5 Editor and test with a real ElevenLabs agent +- [ ] Verify mic audio actually reaches ElevenLabs (enable Verbose Logging) +- [ ] Test `USoundWaveProcedural` underflow behaviour in practice +- [ ] Add lip-sync support (future) +- [ ] Add session memory / conversation history (future, matching Convai) +- [ ] Add environment/action context support (future) +- [ ] Consider Signed URL Mode backend implementation