Introduce the `index` CLI subcommand, implementing a resumable, multi-stage pipeline to partition, dereplicate, and count kmers from input sequences. The command builds a layered de Bruijn graph index per partition, applies optional abundance filtering, and persists unitigs alongside an MPHF-based count matrix. Update `Cargo.toml` and `Cargo.lock` to include new dependencies (`epserde`, `ptr_hash`, `cacheline-ef`, `obicompactvec`, `obilayeredmap`) required for the index builder, and refresh the profiling data files.
Replace `ph` with `ptr_hash` and introduce `epserde` and `rayon` dependencies. Refactor MPHF construction to leverage parallel iteration, eliminating intermediate `Vec<u64>` allocations and reducing memory footprint. Add a `n_kmers` field to track and serialize total kmer counts, alongside three zero-allocation iterators for efficient chunk traversal. Include comprehensive unit tests for the new iterators and update CLAUDE.md to enforce explicit dependency validation policies.
Introduces `into_kmers()` and `into_canonical_kmers()` consuming methods to `PackedSeq` and `Superkmer`, enabling zero-allocation sliding-window k-mer extraction via bitwise operations. This complements existing borrow-based iterators by allowing direct ownership transfer. Also includes minor documentation updates, whitespace fixes, and new unit tests to verify canonical k-mer iteration counts and output sequences.
Removes the `codec` and `limits` modules, eliminating manual serialization logic and OS file descriptor limit queries. Introduces a shared `append_path_suffix` utility to standardize path manipulation across `meta.rs` and `unitig_index.rs`. Refactors the file pool to dynamically size based on available file descriptors and optimizes descriptor lifecycle to prevent leaks. Enhances `SKFileReader` with LRU eviction, consumption tracking, and seek-on-reopen support. Migrates related round-trip and EOF tests to the reader module and updates chunking logic in the unitig index.
Replaces the `write_one` loop with threshold-based draining and inlines metadata updates. Explicitly promotes accessed entries to MRU during flush and drain operations to prevent premature LRU eviction. Updates comments to clarify two-phase locking and MRU promotion semantics.
Extend `SKError` with `BadMagic`, `Truncated`, and `InvalidData` variants to replace `expect()` calls and unsafe slice indexing. Implement proper error chaining via `source()` and update `Display` formatting. Improve magic byte validation and serde error mapping for clearer debugging. Documents a broader roadmap for further crate hardening, including LRU eviction, concurrency, and benchmarking.
Introduce the `obilayeredmap` specification and persistent MPHF-based index architecture for incremental multi-dataset indexing. Implement chunked binary serialization with a fixed `u8` k-mer count limit (256) and overlapping super-kmer segments. Add memory-mapped I/O and a companion `.idx` index file for allocation-free, O(1) unitig access. Update MkDocs navigation, enhance the k-mer comparison script, and add comprehensive tests for serialization, partitioning, and file I/O pipelines.
Centralize k-mer and minimizer configuration using a thread-safe global module, and replace manual bit-packing with a memory-efficient `PackedSeq` type. Refactor core sequence and k-mer types to use compile-time length enforcement and centralized hashing. Introduce a new De Bruijn graph implementation with compact node encoding and traversal iterators. Update I/O, partitioning, and builder modules to align with the new architecture, and add the `xxhash-rust` dependency.
Replace raw SuperkMer routing with a new RoutableSuperKimer type that embeds canonical sequences and precomputed minimizers, enabling direct partition routing via hash. Update the build pipeline to yield RoutableSuperKmers throughout (builder, scatterer), refactor FASTA/unitig export commands to use the new type and compressed outputs (.fasta.gz, .unitigs.fasta.zst), revise SuperKmer header to store n_kmers instead of seql (avoiding 256-byte wrap), and update documentation to reflect minimizer-based theory, two evidence-encoding strategies for unitig-MPHF indexing (global offset vs. ID+rank), and the new obipipeline library architecture with parallel workers, biased scheduling, and error handling.
- Remove redundant validation logic in login handler
- Consolidate session token generation into a single utility function
- Update error handling to use consistent HTTP status codes
- Add new obiskio crate for high-performance SuperKmer serialization/deserialization
- Implement binary codec with 2-bit packed sequence encoding and raw header format (32 bits)
- Add transparent compression support via niffler: Zstd, Gzip/Bgzf/Lz4
- Implement SKFilePool with LRU-based fd management, max-concurrent-fd limiting (75% of ulimit)
- Add SKFileWriter with batched writes, configurable flush threshold (8 KiB default), and two-phase locking
- Add SKFileReader with sequential access, LRU recovery via reopen_and_seek()
+ New obikpartitionner crate: basic header/seq handling for binary super-kmer format
- Bump niffler from 2.7 to v3, add dependencies: allocator-api2, bitflags(>=1), errno/fastrand/rustix/tempfile/lru/hashbrown/bzip2/thiserror
- Update workspace members to include obikpartitionner andobiskio
Eric Coissac