docs: Update project context and session notes

Summarizes recent implementations including Asset Management, audio/visual fixes, and style improvements.

1 files changed, 17 insertions, 2 deletions

diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
index 28f86f8..acc0b43 100644
--- a/PROJECT_CONTEXT.md
+++ b/PROJECT_CONTEXT.md
@@ -36,30 +36,45 @@ Incoming tasks in no particular order:
 - [x] 8. add a #define STRIP_ALL to remove all unnecessary code for the final build
      (for instance, command-line args parsing, or unnecessary options, constant
       parameters to function calls, etc.)
-- [ ] 9. work on the compact in-line and off-line asset system (@ASSET_SYSTEM.md)
-- 9. work on the compact in-line and off-line asset system (@ASSET_SYSTEM.md)
+- [x] 9. work on the compact in-line and off-line asset system (@ASSET_SYSTEM.md)
 
 ## Session Decisions and Current State
 
+### Asset Management System:
+- **Architecture**: Implemented a C++ tool (`asset_packer`) that bundles external files into the binary.
+- **Descriptors**: Assets are defined in `assets/final/assets.txt` with optional compression settings.
+- **Runtime Access**: Provides a type-safe `AssetId` enum and `GetAsset` function for retrieving raw byte data at runtime.
+- **Integration**: Fully integrated into the CMake build process with automatic header/source generation.
+- **Lazy Decompression**: Scaffolding implemented for future on-demand decompression support.
+
 ### Audio Engine (Synth):
 - **Architecture**: Real-time additive synthesis from spectrograms using Inverse Discrete Cosine Transform (IDCT).
 - **Dynamic Updates**: Implemented a double-buffering (flip-flop) mechanism for thread-safe, real-time updates of spectrogram data. The main thread writes to a back buffer, which is then atomically swapped to become the active front buffer for the audio thread, avoiding real-time allocations and locks.
+- **Peak Detection**: Real-time output peak detection with exponential decay for smooth visual synchronization.
 - **Sample Generation**: Samples are generated in the frequency domain (spectrograms) and converted to time-domain audio using IDCT with a Hamming window.
 - **Audio Input Support (`spectool`)**: Supports WAV and MP3 input for analysis (leveraging `miniaudio`'s built-in decoders). AAC is explicitly *not* supported due to complexity and dependency constraints.
 
 ### Tools Developed:
 - `spectool`: A command-line tool for analyzing WAV/MP3 files into `.spec` spectrogram format and for playing back `.spec` files through the synth engine.
 - `specview`: A command-line tool for visualizing `.spec` spectrogram files in ASCII art.
+- `asset_packer`: A build-time tool for embedding assets into the binary.
 
 ### WebGPU Integration:
 - **Strategy**: Uses system-installed `wgpu-native` (e.g., via Homebrew) for the implementation.
 - **Surface Creation**: Uses `glfw3webgpu` helper library to abstract platform-specific surface creation from GLFW windows, keeping the codebase clean and cross-platform.
 - **Headers**: Uses standard `<webgpu.h>` provided by the system install.
+- **Visuals**: Pulsating heptagon synchronized with audio peaks, with automatic aspect ratio correction.
 
 ### Coding Style:
 - **Standard**: Adopted a consistent coding style enforced by `.clang-format`.
 - **Rules**: 2-space indentation, no tabs, 80-column line limit.
+- **Headers**: Mandatory 3-line descriptive header at the top of every `.h` and `.cc` file.
 - **File Extension**: All C++ source files renamed from `.cpp` to `.cc`.
 
+### Platform & Input:
+- **Windowing**: Uses GLFW for cross-platform window management.
+- **Input**: Supports 'Esc' and 'Q' for quitting, and 'F' for toggling fullscreen.
+
 ### Development Workflow:
 - **Commit Policy**: Explicit rule to always run the full test suite before preparing any commit, documented in `CONTRIBUTING.md`.
+- **Testing**: Comprehensive test suite including `AssetManagerTest`, `SynthEngineTest`, `HammingWindowTest`, and `SpectoolEndToEndTest`.