chore: cap torch-geometric below 2.8#902
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torch-geometric 2.8.0 rewrote knn_graph to hard-require pyg-lib>=0.6.0, dropping the torch-cluster fallback. The PyG wheel index only ships pyg-lib>=0.6.0 for torch 2.8.0, so torch 2.5/2.6/2.7 installs resolve to an older pyg-lib and fail at import with: ImportError: 'knn_graph' requires 'pyg-lib>=0.6.0' Cap all torch extras at torch-geometric<2.8 until pyg-lib>=0.6.0 wheels exist for the pinned torch versions. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Caps
torch-geometric<2.8in all three torch extras (torch-25,torch-26,torch-27) insetup.py.torch-geometric 2.8.0 (released 2026-06-05) rewrote
knn_graphto hard-requirepyg-lib>=0.6.0and removed thetorch-clusterfallback. The PyG wheel index only shipspyg-lib>=0.6.0for torch 2.8.0, so installs on our pinned torch versions (2.5/2.6/2.7) resolve to an olderpyg-liband fail at import:Because
torch-geometricwas unpinned, CI went red with no code change on our side — purely an upstream release picked up by dependency resolution.Fix
Pin
torch-geometric<2.8untilpyg-lib>=0.6.0wheels exist for the pinned torch versions.Closes #901
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