AI, networking, and vision — built in. Every release moves the stack forward.

v2026.6.0

• New System.AI library (-lib ai / @ai) — classic AI in the standard library: graph search (Dijkstra, AStar, BreadthFirst, DepthFirst), adversarial game search (Minimax with alpha-beta, MonteCarloTreeSearch), metaheuristics (GeneticAlgorithm, SimulatedAnnealing, HillClimbing), and tabular reinforcement learning (QLearning, Sarsa, MarkovDecisionProcess); all stochastic algorithms are seedable
• System.ML overhaul — 13 new estimators (regularized regression, SVM, perceptron, PCA, Gaussian naive Bayes, AdaBoost, DBSCAN, Gaussian mixture, KD-tree, gradient-boosted trees); real recursive DecisionTree and voting RandomForest; NeuralNetwork bias vectors; seedable System.ML.Random; a uniform Fit/Predict/Score/Store/Load API. Breaking: RandomForest->Train is now Fit; stored NeuralNetwork models must be regenerated
• record types — generate constructor and accessors from field declarations; record : readonly : omits setters and rejects field assignment outside constructors; supports generics and inheritance
• JIT & compiler fixes — frame-dependent traps stay interpreted past the auto-JIT threshold (AMD64 + ARM64); ARM64 stale-self reload after callbacks; float equality on array elements no longer mis-compiled; bool array literal-pool corruption fixed
• Library improvements — library aliases (@std/@ml/@ai/@game) documented; Data.XML rejects truncated documents, fixes ' decoding, and adds EncodeText/SetEncodedContent/GetDecodedContent/GetDecodedValue

v2026.5.4

• Debugger test reliability — Windows CI debugger tests fixed; .obe/.obl format detection now correctly handles the edge case where a new-format size-header LSB collides with the 0x78 zlib CMF byte
• LSP shell script permissions — all tools/lsp/ shell scripts now carry the execute bit in git, fixing Permission denied in the LSP release CI job
• Release workflow hardening — git checkout -f master prevents dirty-tree abort when committing api.zip from a tag-based build

v2026.5.3

• JIT select dispatch — dense integer select (6+ cases) emits a native O(1) jump table; small sets use a linear scan; sparse/string falls back to BST — best strategy chosen automatically on AMD64 and ARM64
• API documentation overhaul — bundle overview panels, 500+ inline code examples, global search index, two-column TOC, method badges, and anchor links across all 32 library pages
• ODBC improvements — live SQLite integration test; transaction support (Commit/Rollback/SetAutoCommit) verified; GetColumns metadata
• Bug fixes — HttpRequestHandler Nil safety on dropped connections; String->Split(Char) trailing token fix; bench_spectralnorm_native JIT stack-balance fix
• Performance — bench_spectralnorm_native: incremental FP denominator eliminates per-element I2F conversions from the inner loop

v2026.5.2

• HTTP/2 client — Http2Client with persistent TLS connections, GET/POST/PUT/DELETE/PATCH, and Quick* one-liners via nghttp2 + ALPN
• HTTP/3 / QUIC client — Http3Client over UDP with connection reuse and the same Quick* API (ngtcp2 + nghttp3 + GnuTLS)
• HTTP/1.1 improvements — PATCH method, redirect handling fixes for POST/PUT, retry parity across HttpClient/HttpsClient
• OpenAI Moderation & Batch — Moderation->Check() per-category flags/scores; Batch->Create()/Get() for async 50%-cost batch requests
• Gemini Files, Cache, Grounding, BatchEmbed — upload/list/get/delete files; server-side prompt caching; Search Grounding; batch embeddings in one round-trip
• WebSocket hardening — 8 bug fixes + bulk ReadBuffer I/O replacing per-byte reads
• MCP server fixes — hang on shutdown and crash-on-stop resolved
• Socket reliability — SO_REUSEADDR on TCPSocketServer::Bind(); IPSocket::Open() falls through to next address on failure
• ARM64 Windows — OpenCV and ONNX now fully supported on ARM64 Windows
• Improved release process — self-contained Windows builds; CI verifies all binaries and API docs on all platforms before publishing

v2026.4.3

• DAP debugger hover — hovering an object shows ClassName { field=val, ... } with one-level instance field expansion
• DAP instance/class variable scopes — Variables pane shows separate Locals, Instance, and Class scopes
• DAP stepping + crash fixes — fixed step-into crash, step-over/out scoping, stdout corruption, disconnect access violation
• Editor setup refresh — updated VS Code, Sublime Text, and gvim DAP+LSP setup for Windows, Linux, and macOS
• LSP crash fixes — null guards for textDocument/codeAction with inferred locals, hover position fix
• Configurable JIT threshold — auto-JIT invocation count can now be tuned
• Fixed JIT S2F callback param count causing segfault on String:ToFloat
• Hardened HTTPS client against null ReadLine on connection failures

v2026.4.2

• JIT local variable register cache (AMD64 + ARM64) — ~3x speedup across all benchmarks
• DTLS support — secure UDP via DTLSSocket and DTLSSocketServer
• AI libraries — Gemini 2.5, Ollama options/tools, OpenAI embeddings, ML fixes
• Hardened JSON/XML parsers, LTO, ARM64 native CPU tuning

v2026.4.1

• Debug Adapter Protocol (DAP) for VS Code with conditional breakpoints and ANSI colors
• 3.3x binarytrees speedup — young-gen bump allocator, direct JIT-to-JIT calling
• GC thread safety with memory barriers to fix intermittent threading segfaults
• macOS .pkg installer — signed and notarized with PATH auto-configuration
• Networking, ODBC, OpenCV, Phi-3 Vision improvements

v2026.2.1

• Added try/otherwise error handling framework
• 4.38x nbody speedup, CSE, dead code elimination
• 14 debugger and 16 runtime regression tests in CI

v2025.7.0

• Added Hash->Dict(), Map->Dict(), and Vector->Zip() to collections
• Updated style (docs, logos); bug fixes

v2025.6.3

• Support for user-provided HTTPS PEM files
• Multi-statement pre/update support in for loops

v2025.6.2

• New API documentation system
• OpenAI Responses API; improved JSON schema support