Logtalk 3.102.0 released

[pmoura]

Logtalk 3.102.0 is now available for downloading at:

https://logtalk.org/

This is a major library-focused release featuring new natural-language processing, machine learning, numerical analysis, optimization, cryptography, networking, data interchange, identifier, and data structure libraries. It also significantly extends the MCP server and cryptography libraries, updates Unicode support, adds compiler and tool linter checks, and includes important HTTP reliability and portability fixes.

New libraries by category/area

Text processing / natural language processing

• lemmatization for extensible word lemmatization
• n_grams for generating and counting token and character n-grams
• stop_words for stop-word enumeration, membership testing, and filtering, with lists for six languages
• tokenization for extensible tokenization and sentence splitting
• text_normalization for Unicode-aware text cleaning and normalization
• text_vectorization for binary, count, term-frequency, and TF-IDF sparse vectorization
• language_detection for extensible text language detection

Networking / protocols / data interchange

• http_oauth for OAuth 2.0 Bearer request protection, protected-resource metadata, token introspection, and JWT verification
• http_sse for HTTP Server-Sent Events
• uri_template implementing RFC 6570 URI Templates
• mqtt implementing an MQTT 5.0 client
• smtp implementing a portable SMTP/ESMTP client
• bson implementing the BSON 1.1 binary interchange format
• gpx implementing the GPX 1.1 GPS data interchange format
• byte_order for signed and unsigned fixed-size integer conversions in big- and little-endian byte order

Cryptography / security

• paseto implementing Platform-Agnostic Security Tokens version 4
• block_ciphers providing portable AES-128, AES-192, and AES-256 implementations
• cmac implementing the NIST SP 800-38B Cipher-based Message Authentication Code

Mathematics / numerical methods / optimization

• integer_partitions for generating and querying integer partitions
• univariate_distributions for normal distribution sampling, density, log-density, cumulative distribution, and quantiles
• multivariate_distributions for multivariate normal and Student's t distributions, logistic-normal sampling, and Mahalanobis distances
• linear_programming for immutable construction and solving of small linear programs
• numerical_analysis for root finding, quadrature, interpolation, cubic splines, and non-stiff initial-value ODE solvers
• local_optimization for common box-constrained solvers
• constrained_optimization for common equality- and inequality-constrained solvers
• ant_colony, genetic_algorithm, differential_evolution, particle_swarm_optimization, and tabu_search metaheuristic optimization libraries

Machine learning / artificial intelligence

• association_rule_miner for deriving confidence- and lift-scored rules from frequent itemsets and sequential patterns
• mlp_classifier implementing a multi-layer perceptron classifier for continuous, categorical, and mixed tabular datasets
• one_class_svm_anomaly_detector implementing one-class SVM anomaly detection
• spectral_clusterer implementing normalized spectral clustering
• svr_regression implementing support vector regression with linear, polynomial, and radial basis function kernels
• tsne_projection and umap_projection for nonlinear dimension reduction
• trueskill_ranker implementing TrueSkill ranking for ordered multiplayer matches
• ripple_down_rules implementing SCRDR, MCRDR, and GRDR rule systems

Utilities / identifiers / data structures

• crontab for parsing and generating user and system crontab files
• lru_caches implementing immutable least-recently-used caches
• sqids for short, obfuscated, URL-safe encodings of non-negative integer lists
• typeid for type-safe, K-sortable, globally unique identifiers
• tries implementing prefix trees associating complete strings with values

Changed libraries by category/area

Cryptography / hashing

• crypto: added Ed25519 signatures, X25519 key agreement and authenticated ephemeral channels, XChaCha20-Poly1305 authenticated encryption, and bcrypt b2 support
• crypto: fixed PBKDF2 conformance with RFC 8018
• hashes: added generalized BLAKE2 functions accepting key and digest-size parameters
• hmac: documented BLAKE2 support and added HMAC-BLAKE2b and HMAC-BLAKE2s tests
• http_authenticate: updated for bcrypt b2 support

MCP

• mcp_server: added support for the 2025-11-25 and 2026-07-28 specifications
• mcp_server: added completions, resource templates, OAuth, MCP Apps, optional output schemas, and schema overrides
• mcp_server: improved reporting of tool-call failures and separated data-layer specifications from transports
• mcp_server: removed support for the deprecated 2025-03-26 specification

HTTP / networking

• http_process_transport: added full socat support and configurable connection helper executables
• http_process_transport and sockets: fixed connection teardown ordering to preserve buffered output
• HTTP transports: fixed per-connection error handling so listeners continue serving subsequent connections
• HTTP server and file-serving libraries: fixed partial-request disconnects and symbolic-link document roots
• http_process_transport: fixed an ncat shutdown race and OpenSSL command handling; OpenSSL 3.0.0 or later is now required
• http_router: now implements http_handler_protocol as a marker protocol
• http_parameters and http_router: now use standard domain errors for parameter validation

Mathematics / ranking / text

• linear_algebra: defined consistent empty-vector and zero-width matrix semantics
• ranking_protocols: added ordered multiplayer datasets with ranked teams and weighted player participation
• thurstone_mosteller_ranker and trueskill_ranker: now reuse shared distribution and normal-quantile functionality
• string_distance: added Caverphone and NYSIIS encodings and improved Metaphone and Double Metaphone
• list: improved the performance of nth0/3 and nth1/3
• random: fixed several API declarations, formulas, validations, and edge cases

Unicode / types / portability

• unicode_data: updated to Unicode 17.0.0 with reproducible generation, shared ranges, optional compatibility views, and preserved Unihan variant solutions
• types and arbitrary: added the open_probability type
• amqp, character_sets, hashes, ieee_754, and protobuf: updated to use the new byte_order library
• sockets and jwt: improved portability across supported backends

New and updated tools

Diagnostics / linting

• ports_profiler: added diagnostics for unexpected non-determinism in predicates declared with deterministic modes
• lgtunit: added a linter warning for invalid ^^assertion/1-2 goals
• lgtunit: now expands test assertions to avoid false dead-code warnings
• dead_code_scanner: now detects unused built-in predicates referenced through uses/2 and use_module/2 directives
• tutor: updated with explanations for the new compiler linter warnings

HTTP server automation

• Added logtalk_http_server.sh and logtalk_http_server.ps1 for starting servers using the Logtalk HTTP libraries with ECLiPSe, SICStus Prolog, SWI-Prolog, Trealla Prolog, and XVM

Compiler, runtime, and backend updates

• Added logtalk_linter_hook/7 support for linting super calls and messages to self
• Added warnings for cuts followed by goals that throw errors and for once/1 goals used as an if-then-else or soft-cut condition
• Fixed the arithmetic_expressions flag
• Fixed the ordering of initialization/1 directive goals found in included files
• Fixed false missing-predicate reports from logtalk_make(check) for complementing categories
• Updated Trealla Prolog tabling and linter support; Trealla Prolog 3.9.64 or later is now required
• Updated SWI-Prolog proprietary predicate metadata used by the linter

Documentation, examples, and other updates

• Added a Handbook section on third-party library dependencies and improved manual installation instructions
• Added examples for HTTP Server-Sent Events, MCP servers, and MCP Apps
• Updated the birds_mcp example for the 2026-07-28 MCP specification
• Improved multi-threaded examples to avoid possible random-number generation races
• Added negative-duration support to the iso8601 contribution
• Updated the portable Docker image and VSCode code-navigation support

Thanks to Andrew Davison for the Trealla Prolog patch, performance and networking reports, and multi-threading analysis, and to Lindsey Spratt for the rest library performance fix.

For details and a complete list of changes, please consult the release notes at:

https://github.com/LogtalkDotOrg/logtalk3/blob/master/RELEASE_NOTES.md