Update test summary with HF Spaces build fix details

.hf-test-summary.md

@@ -1,28 +1,33 @@
 # Hugging Face Spaces Docker Build Test Summary
 
-## Test Results - FINAL
+## Test Results - FINAL ✅
 
 ### ✅ Docker Build - PASSED
 - Successfully built Docker image simulating HF Spaces environment
 - All dependencies installed correctly
-- Package installed with `-e .` in requirements.txt
+- Mosaic package auto-installs on first run
 
-### ✅ Module Installation - PASSED
+### ✅ Module Installation - PASSED  
 - `mosaic` module imports successfully
 - Package structure is correct
-- `pyproject.toml` configuration works
+- `pyproject.toml` and `setup.py` configuration works
 
 ### ✅ Runtime Dependencies - FIXED
 - **Issue Found**: Mussel `tensor.py` was deleted but still referenced
-- **Root Cause**: Commit 91c4977 deleted `mussel/datasets/tensor.py` but the file is still used by:
-  - `mussel/cli/run_paladin.py`
-  - `mussel/cli/run_aeon.py`
-  - `mussel/datasets/__init__.py`
+- **Root Cause**: Commit 91c4977 deleted `mussel/datasets/tensor.py` but the file is still used
 - **Fix Applied**: Restored `tensor.py` from previous commit (a1aece3)
 - **Status**: Fixed and pushed to Mussel ray-dev branch (commit 26e184b)
 
+### ✅ HF Spaces Build Process - FIXED
+- **Issue**: HF Spaces mounts requirements.txt before copying app code, causing `-e .` to fail
+- **Solution**: 
+  1. Removed `-e .` from requirements.txt
+  2. Added `setup.py` for package definition
+  3. Modified `app.py` to auto-install package on first import
+- **Result**: Build now succeeds, package installs automatically at runtime
+
 ### ✅ Full Integration Test - PASSED
-All imports work correctly after Mussel fix.
+All imports work correctly after all fixes applied.
 
 ## Docker Test Commands
 
@@ -36,6 +41,11 @@ Test module import:
 docker run --rm mosaic-hf-test python -c "import mosaic; print('Success!')"
 ```
 
+Test app startup:
+```bash
+docker run --rm mosaic-hf-test python app.py --help
+```
+
 Test full app imports:
 ```bash
 docker run --rm mosaic-hf-test python -c "
@@ -45,37 +55,72 @@ print('All imports successful!')
 "
 ```
 
-## Mussel Repository Fix
+## Solution Details
 
-**Repository**: `/gpfs/mskmind_ess/limr/repos/Mussel`
-**Branch**: `ray-dev`
-**Fix Commit**: 26e184b
-**Fix**: Restored `mussel/datasets/tensor.py` file
+### HF Spaces Build Issue Resolution
 
-The file contains:
-- `TileFeatureTensorDataset` class
-- `SiteType` enum (PRIMARY, METASTASIS)
+**Problem**: Hugging Face Spaces uses this build pattern:
+```dockerfile
+RUN --mount=target=/tmp/requirements.txt,source=requirements.txt \
+    pip install --no-cache-dir -r /tmp/requirements.txt
+```
 
-## Next Steps for HF Spaces Deployment
+This mounts requirements.txt to `/tmp` before the app code is copied, so `-e .` fails because `/home/user/app` doesn't exist yet.
+
+**Solution**: Auto-install approach
+1. Remove `-e .` from requirements.txt (only external dependencies)
+2. Add `setup.py` for setuptools compatibility
+3. Modify `app.py` to install package on first import:
+```python
+try:
+    import mosaic
+except ImportError:
+    subprocess.check_call([sys.executable, "-m", "pip", "install", "-e", "."])
+    import mosaic
+```
 
-1. ✅ Docker build process works correctly
-2. ✅ requirements.txt configured with `-e .`
-3. ✅ Mussel dependency issue fixed
-4. 🔧 Set HF_TOKEN and GH_TOKEN secrets in HF Spaces settings
-5. 🚀 App is ready to deploy!
+This allows HF Spaces to:
+1. Install all external dependencies from requirements.txt ✅
+2. Copy the app code ✅
+3. Auto-install the mosaic package when app.py runs ✅
 
 ## Files Modified
 
 ### Mosaic Repository
-- `requirements.txt` - Added `-e .` to install package
-- `app.py` - Fixed missing imports (os, subprocess)
+- `requirements.txt` - Removed `-e .`, keeping only external dependencies
+- `app.py` - Added auto-install logic for mosaic package
+- `setup.py` - Added simple setuptools configuration
 - `Dockerfile.hf` - Created for local testing (mirrors HF Spaces build)
+- `.hf-test-summary.md` - This documentation
 
 ### Mussel Repository (upstream fix)
 - `mussel/datasets/tensor.py` - Restored file (was incorrectly deleted)
 
+## Next Steps for HF Spaces Deployment
+
+1. ✅ Docker build process works correctly
+2. ✅ requirements.txt configured for HF Spaces
+3. ✅ Mussel dependency issue fixed
+4. ✅ Auto-install mechanism working
+5. 🔧 Set HF_TOKEN and GH_TOKEN secrets in HF Spaces settings
+6. 🚀 App is ready to deploy!
+
 ## Deployment Status
 
 b�� **READY FOR DEPLOYMENT**
 
-The app has been successfully tested in a Docker environment that mimics Hugging Face Spaces. All dependencies are resolved and imports work correctly.
+The app has been successfully tested in a Docker environment that mimics Hugging Face Spaces' build process. All dependencies are resolved, the build succeeds, and imports work correctly.
+
+### Required Secrets for HF Spaces
+
+Set these in your Space settings:
+- `HF_TOKEN` - Your Hugging Face access token with read access to PDM-Group
+- `GH_TOKEN` - GitHub token to install private Paladin package (optional, only if using private Paladin)
+
+### Testing the Deployment
+
+Once deployed, the app will:
+1. Install dependencies from requirements.txt
+2. Auto-install the mosaic package on first run
+3. Download models from HuggingFace (requires HF_TOKEN)
+4. Launch Gradio interface on port 7860