Update documentation to reflect architectural fixes in the NUMA partition runner and implementation changes in the merge and select modules. The partition runner now wraps task execution in `catch_unwind`, emitting panic events that count toward completion thresholds to prevent controller deadlocks, while re-raising the first payload on return. CLI documentation for select has been updated to mandate output directories, introduce default hard-linking with automatic fallback, and document presence aggregation optimizations. Known issues such as self-merge crashes and sparse-packed index gaps are now documented as failing fast due to these improvements.
Renames the CLI flag from --metric to --distance and introduces eight closed-form SNP distance models with optional Jin-Nei gamma correction. Integrates the ndarray crate for matrix operations and adds relaxed PHYLIP output formatting. Updates architecture and theory documentation to cover the new sparse matrix variants, algorithmic fixes, and distance metric implementations.
The command now supports reopening existing indexes instead of failing when the output file exists. Control flow branches between opening an existing index and constructing a new one, moving configuration setup exclusively to the creation path. Directory existence is enforced upfront with proper I/O error propagation. The --force flag retains its original semantics by removing the target directory before proceeding with a fresh build.
Introduces --iqtree-min-freq (default 0.001) to treat low-frequency nucleotide states as missing data during IQ-TREE alignment generation when --free-loss is active. This triggers a recoding pass that folds rare states into the missing symbol, followed by non-informative site removal and alphabet recomputation to maintain output consistency. The change also adds Sankoff model configuration files and updates related tests and documentation.
Replaces premature exponentiation-based row normalization with log-sum-exp arithmetic to prevent tiny probabilities from collapsing to exactly zero. This eliminates spurious infinite costs for valid but rare transitions while preserving correct IEEE 754 semantics for genuinely unobserved pairs. Adds explicit guards against NaN in degenerate rows and includes a regression test verifying finite costs for probabilities as low as 1e-200.
Generates a new CSV output that maps IQ-TREE's compact state symbols to canonical states alongside full-precision empirical frequencies. Updates documentation to clarify that state frequencies sum to 1.0 by design and documents conditional behavior under `--free-loss`. Includes unit tests verifying absent state exclusion, frequency summation, and CSV structure. Also restricts entropy annex resolution to non-monomorphic minorants to eliminate redundant per-genome checks.
Eric Coissac