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Successfully identified and fixed the zarr-3 compatibility issues in cyto-dl. Here's what I found and fixed:

What Was the Issue?
The project was using older version constraints that didn't explicitly require zarr-3 and the latest ome-zarr version. While the code itself was compatible, the dependency versions needed to be updated to ensure zarr-3 is used.

Changes Made
Updated Dependencies (pyproject.toml:36-37)

Added explicit zarr>=3.0.0 requirement
Updated ome-zarr>=0.12.0 (from >=0.6) for full zarr-3 support
Comprehensive Testing Created three test suites to verify compatibility:

test_zarr3_compat.py - Tests basic zarr-3 and ome-zarr functionality
test_bioio_zarr3.py - Tests bioio-ome-zarr with both zarr v2 and v3
test_ome_zarr_reader.py - Tests the OmeZarrReader class
Documentation

Created ZARR3_COMPATIBILITY.md with full compatibility details
Testing Results
All tests passed successfully ✅:

zarr v3 API works correctly (now default format)
zarr v2 format still supported for backward compatibility
ome-zarr Reader works with zarr-3
bioio-ome-zarr works with zarr-3
Dataloader code works with zarr-3 format
Good News
The existing dataloader code in cyto_dl/image/io/ome_zarr_reader.py and bioio_loader.py didn't require any changes! They were already using the correct API patterns that work with zarr-3.

claude and others added 10 commits November 22, 2025 00:09
This commit updates the cyto-dl dependency configuration to support the latest
PyTorch and CUDA ecosystem:

Major changes:
- Updated PyTorch from ~=2.0.0 to >=2.9.1
- Updated CUDA libraries from CUDA 11 to CUDA 12 (cu11 -> cu12)
- Updated Python requirement from >=3.9,<3.12 to >=3.10,<3.13
  (required by PyTorch 2.9.1)
- Removed pinned dependency constraints (~= and ==) in favor of minimum
  versions (>=) for better flexibility
- Regenerated uv.lock with pre-release support for Lightning compatibility
- Synced all requirements/*.txt files with updated lock file

Key dependency updates:
- torch: 2.0.1 -> 2.9.1
- torchvision: 0.15.2 -> 0.24.1
- triton: 2.0.0 -> 3.5.1
- All nvidia-* packages updated to CUDA 12.8 versions

This enables support for next-generation GPU capabilities and software
optimizations.
This commit removes SHA256 hashes from all requirements/*.txt files
for easier maintenance and readability. All files were regenerated
using 'uv export --no-hashes'.
This commit updates the cyto-dl dependency configuration for the latest
PyTorch ecosystem with the following major changes:

## Dependency Configuration Changes:
- Updated PyTorch from ~=2.0.0 to >=2.9.1
- Updated Python requirement from >=3.9,<3.12 to >=3.10,<3.13
  (required by PyTorch 2.9.1)
- Removed all pinned dependency constraints (~= and ==) in favor of
  minimum versions (>=) for better flexibility
- Added PyTorch cu130 index for future CUDA 13.0 support via
  extra-index-url configuration

## Lock File Updates:
- Regenerated uv.lock with pre-release support for Lightning compatibility
- All requirements/*.txt files synced without hashes for easier maintenance
- Currently resolved to CUDA 12.8 packages (cu13 packages not yet available
  on PyTorch index, but configuration is ready)

## Key Package Updates:
- torch: 2.0.1 → 2.9.1
- torchvision: 0.15.2 → 0.24.1
- triton: 2.0.0 → 3.5.1
- All nvidia-* CUDA packages updated to version 12.8

Note: CUDA 13.0 index configured at https://download.pytorch.org/whl/cu130
but packages currently resolve to CUDA 12.8 from PyPI. Once CUDA 13.0
wheels become available on the PyTorch index, simply re-running `uv lock`
will pick them up automatically.
Added configuration for PyTorch CUDA 13.0 index:
- Set index-url to https://download.pytorch.org/whl/cu130 as primary
- Set PyPI as extra-index-url fallback
- Enabled index-strategy = "unsafe-best-match" to search all indexes

Currently resolves to CUDA 12.8 packages as cu130 wheels appear
unavailable on the index at this time. Configuration is ready to
pick up CUDA 13.0 packages once they become available on the
PyTorch index.
Major Changes:
- Updated all bioio packages to latest versions:
  * bioio: 1.5.2 -> 3.0.0
  * bioio-base: 1.0.7 -> 3.0.0
  * bioio-czi: 2.1.0 -> 2.4.1
  * bioio-ome-tiff: 1.1.0 -> 1.4.0
  * bioio-ome-zarr: 1.2.0 -> 3.1.0
  * bioio-tifffile: 1.1.0 -> 1.3.0

- Updated Python requirement: >=3.10,<3.13 -> >=3.11,<3.13
  (Required by bioio-ome-zarr 3.1.0 and compatible with PyTorch 2.9.1)

- Configured PyTorch CUDA 13.0 index:
  * Added pytorch-cu130 index at https://download.pytorch.org/whl/cu130
  * Set as default index with explicit priority
  * Added installation instructions in README for CUDA 13.0

- Updated README.md:
  * Changed Python version in installation from 3.10 to 3.11
  * Added explicit PyTorch CUDA 13.0 installation step using uv

- Regenerated all requirements files with updated dependencies

Note: Lock file currently resolves to PyPI's CUDA 12 packages due to
cross-platform resolution. Users should install PyTorch with CUDA 13.0
using: uv pip install torch torchvision --index-url https://download.pytorch.org/whl/cu130

Dependencies updated: 33 packages (bioio ecosystem, AWS SDK, zarr, and more)
After investigation, uv's universal lock file cannot use CUDA 13.0-specific
PyTorch packages because:
- uv.lock must resolve for ALL platforms (Linux, macOS, Windows)
- CUDA 13.0 wheels only exist for Linux x86_64
- Cross-platform resolution requires using PyPI's CUDA 12 packages

Solution: Keep lock file with CUDA 12 packages for cross-platform compatibility.
Linux users install CUDA 13.0 manually as documented in README:
  uv pip install torch torchvision --index-url https://download.pytorch.org/whl/cu130

This approach provides:
- Universal lock file for all platforms
- Clear installation path for CUDA 13.0 on Linux
- No breaking changes for macOS/Windows users
The uv.lock file was preventing users from installing PyTorch with CUDA 13.0
because it locked dependencies to CUDA 12 packages.

Why remove the lock file:
- PyTorch CUDA 13.0 is available for both Windows and Linux
- Users can install with: uv pip install torch torchvision --index-url https://download.pytorch.org/whl/cu130
- Lock file created cross-platform compatibility issues
- Requirements files provide sufficient dependency management

Changes:
- Deleted uv.lock
- Added uv.lock to .gitignore
- Updated README to clarify CUDA 13.0 works on Windows and Linux
- Dependencies are now managed through requirements/*.txt files

Users install PyTorch separately with the CUDA version they need, then install
remaining dependencies from requirements files. This provides flexibility for
different CUDA versions and platforms.
Major improvements to documentation:

Installation Section:
- Added step-by-step installation guide with prerequisites
- Included multiple PyTorch installation options:
  * CUDA 13.0 (Windows/Linux) - recommended
  * CUDA 12.4 (Windows/Linux)
  * CPU-only (all platforms)
  * macOS Apple Silicon
- Added verification commands to check installation
- Included troubleshooting section for common issues
- Documented installation with different extras (base, all, equiv, spharm, test)

Workflow Examples Section (10 comprehensive examples):
1. Training a segmentation model via CLI
2. Running inference with a trained model
3. Complete workflow using Python API (train + predict)
4. Training on custom in-memory numpy arrays
5. Label-free prediction workflow
6. Self-supervised pre-training with MAE
7. Working with point cloud data
8. Hyperparameter tuning with Hydra multirun
9. Resuming training from checkpoint
10. Custom data loading configuration

Each example includes:
- Clear use case description
- Complete code snippets
- Expected outputs
- Command-line and Python API variations

This provides users with practical, copy-paste-ready examples for common
workflows and makes the library much more accessible to new users.
…feuV2Doa5R2Kuvm

Claude/main merge 01 e df f sbhfeu v2 doa5 r2 kuvm
This commit ensures full compatibility with zarr-3 format for all dataloader code.

Changes:
- Added explicit zarr>=3.0.0 dependency to ensure zarr-3 is used
- Updated ome-zarr>=0.12.0 for zarr-3 compatibility
- Added comprehensive test suites to verify zarr-3 functionality
- Added ZARR3_COMPATIBILITY.md documenting compatibility status

The existing codebase is fully compatible with zarr-3 as it uses the
correct API patterns through ome-zarr and bioio libraries. No code
changes were required to the dataloader implementation.

Testing confirmed:
- zarr v3 format works correctly (now default)
- zarr v2 format still supported for backward compatibility
- ome-zarr Reader works with zarr-3
- bioio-ome-zarr works with zarr-3
- OmeZarrReader class works with both formats

Fixes issues with zarr-3 breaking changes by explicitly requiring
compatible versions of all zarr-related dependencies.
@derekthirstrup derekthirstrup changed the title Claude/fix zarr3 compatibility 013 mp ndc cqaq e bnf b dqhecqh fix zarr3 compatibility Nov 23, 2025
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2 participants