Docs.rs

Native async Rust client for a FeltDB server: records, atomic and idempotent transactions, compare-and-set, bounded queries, read-basis fences, events, and the canonical application API

Text: measurement, OpenType shaping (HarfRust), font families, weights and fallback, bidi, line breaking, vertical-rl CJK columns, paragraph layout, glyph atlases, SDF/MSDF rasterization, glyphs encoded for coverage from their curves and the TextPort

Device and OS service Ports (display, haptics, geolocation, notifications, share, links, file picker, camera, speech, AR, XR, legacy app data import and more) with null, scripted and host-fed implementations, plus opt-in local persisted Rust panic capture with breadcrumbs and explicit acknowledgement

Visual effects: CPU particle simulation (emitters with constant, curve or random start values, rate, bursts and cycles, stepped or sampled at a time; modules, collisions and events), effect documents and Unity particle-system import, GPU particle dispatch plans, trails, ribbons, beams, and screen shake

Localization: source-text messages (MessageFormat 2), catalogs and the run-time locale, per-locale string tables and a message catalog with CLDR plurals and typed arguments, and the script direction of a tag; with locale-tags, BCP-47 parsing; with the cldr feature, ICU4X locale data (plurals, numbers, currency, dates, collation)

Canonical keel.toml parser with typed, independently validated sections

Icon model, SVG path grammar, and the bundled Lucide and Phosphor icon sets

AudioPort and the real-time AudioEngine: lock-free mixer, bus graph, effects, HRTF, streaming, granular voices, time-stretch and sfxr sound effects; WAV, Ogg Vorbis and Opus decoding, Ogg Opus encoding; device output through cpal and, in the browser, scheduled Web Audio buffers

2D vector graphics: paths, strokes, gradients, clips, view boxes, hit-testing, tessellation, CPU raster and SVG import

Asset server with typed handles, async imports, a content-addressed cache, hot reload, download packs and generated cells on a web worker; texture pipeline for PNG, JPEG and KTX2 with Basis Universal transcoding and encoding; glTF 2.0 importer

Input mapping from host events to the title's own action enum: ActionSystem<A> with contexts, players, deadzones and tap/hold triggers, the per-step InputState, Actions<A>, rebinding, keyboard shortcuts with platform glyphs, virtual sticks, drag look, IME buffer, and gilrs or SDL2 gamepads

Game AI: blackboard, behavior trees, utility AI, hierarchical FSM, budgeted ECS scheduling, decision traces, GOAP, HTN, Monte Carlo tree search, perception, spatial queries, smart objects, influence maps and optional motion-matching training experiments

Runs models: the inference Port (InferPort) with on-device null, scripted, host-fed, cascade, dense MLP and tract ONNX backends and per-call limits, typed decision models on candle or ONNX Runtime, calibration, and a text generation Port (GeneratePort) with a cost ledger and spend policy, and an on-device speech-to-text Port (TranscribePort); the remote OpenAI-compatible client is the opt-in generate-http feature and SenseVoice speech-to-text the opt-in transcribe-sensevoice feature

Procedural macros for Keel UI: #[component], #[derive(StableKey)] and the view templates behind col!, row!, stack! and children!, and the generated-content recipes image!, sfx!, music!, video! and character!

Table and sparse-set ECS in safe Rust: generational entities, Fragments, typed queries with per-chunk change detection and slice iteration, Relations, Resources, budgeted cooperative Jobs, events, observers, command buffers, a dependency-graph system scheduler that runs compatible systems in parallel, and serde snapshots with per-seat observed-state projections