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cayleyR 0.2.1

Breaking changes

• Removed arrow dependency — all functions now return plain data.frame instead of Arrow Tables
• data.table moved from Imports to Suggests — package works without it, uses data.table for speed when available

Improvements

• Significantly faster installation: removed heavy arrow dependency (~50+ MB)
• Lightweight by default: only Rcpp is required

cayleyR 0.2.0

New features

• GPU acceleration via ggmlR Vulkan backend (optional):
  • cayley_gpu_available(), cayley_gpu_init(), cayley_gpu_status(), cayley_gpu_free() — GPU infrastructure with lazy initialization
  • calculate_differences(..., use_gpu = TRUE) — Manhattan distance on GPU (sub -> abs -> sum_rows)
  • apply_operations_batch_gpu() — batch permutation operations via matrix multiplication on GPU
  • manhattan_distance_matrix_gpu() — pairwise N*M Manhattan distance matrix using 3D tensors
• Sparse BFS: sparse_bfs(), reconstruct_bfs_path() — sparse BFS with hybrid hub/random selection
• BFS pathfinding: find_path_bfs() — find path via BFS highways + iterative connector
• Path shortening: short_path_bfs() — greedy BFS hopping to shorten existing paths
• Bidirectional BFS pathfinding: bidirectional_bfs() for shortest path between permutation states
• Iterative path solver: find_path_iterative() for finding paths via cycle expansion
• Celestial coordinates: convert_LRX_to_celestial(), calculate_angular_distance_z(), calculate_midpoint_z(), find_closest_to_coords() — map operation counts to spherical coordinates
• Combination analysis: analyze_top_combinations() for full cycle analysis of top operation sequences
• State utilities: generate_state(), generate_unique_states_df(), select_unique(), check_duplicates(), save_bridge_states(), find_combination_in_states(), convert_digits()
• Path utilities: invert_path(), validate_and_simplify_path(), reconstruct_full_path()
• Distance metrics: manhattan_distance(), breakpoint_distance(), short_position()
• Simple operation variants: shift_left_simple(), shift_right_simple(), reverse_prefix_simple()

Improvements

• C++ implementations of all core operations via Rcpp with OpenMP
• GPU functions fall back to CPU automatically when ggmlR/Vulkan is unavailable

cayleyR 0.1.0

• Initial CRAN submission.
• Basic TopSpin operations: shift_left(), shift_right(), reverse_prefix()
• Cycle analysis functions: get_reachable_states(), get_reachable_states_light()
• Optimization tools: find_best_random_combinations()

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.