language::actors — # Actorslanguage::concurrency — # Structured concurrencylanguage::machines — # State machineslanguage::resources — # Resourceslanguage::supervision — # Supervisionstd::arena — Generational-index slotmap (`Arena<T>`).std::bench — Benchmark harness for measuring function performance.std::builtins — Built-in functions available in every Hew program.std::deque — Double-ended queue (deque).std::failure — Failure-philosophy stdlib types for lifecycle hooks.std::fmt — Number formatting and string padding utilities.std::fs — File system operations.std::io — Standard I/O operations.std::iter — Iterator combinators for `Vec<T>` and any `Iterator` implementation.std::link_monitor — Actor monitor and link handle helpers.std::math — Mathematical operations.std::mem — Low-level memory primitives (compiler-internal floor).std::metrics — Developer-defined application metrics.std::net — TCP networking.std::observe — Runtime observability reads.std::option — Option methods.std::os — Operating system interfaces.std::path — File path and glob utilities.std::pipeline — Temporary S1 admission-proof shim for a concrete two-stage i64 pipeline.std::prelude — Compiler-embedded prelude authority manifest.std::process — Process execution.std::random — Seedable pseudo-random number generation.std::result — Result methods.std::semaphore — Counting semaphore for concurrency control.std::sort — Sorting utilities for vectors.std::stream — Stream<T> and Sink<T> — the one pipe family.std::string — string conversion and manipulation utilities.std::testing — Controls for deterministic Hew tests and runs.std::vec — Vec utility functions.std::concurrency::lifecycle — Generic lifecycle state machine for resource-owning services.std::crypto::crypto — Cryptographic hashing and utilities.std::crypto::encrypt — Symmetric encryption and decryption.std::crypto::jwt — JSON Web Token encoding and validation.std::crypto::password — Password hashing and verification (Argon2id).std::crypto::sign — Ed25519 asymmetric signing and verification.std::encoding::base64 — Base64 encoding and decoding — pure Hew implementation.std::encoding::binary — Fixed-width integer encoding and decoding in little-endian and big-endianstd::encoding::cbor — CBOR (RFC 8949) encoding of any data value.std::encoding::compress — Compression and decompression (gzip, deflate, zlib).std::encoding::csv — CSV parsing — pure Hew implementation.std::encoding::hex — Hexadecimal encoding and decoding.std::encoding::json — JSON values with automatic cleanup and independent copies.std::encoding::markdown — Markdown to HTML conversion.std::encoding::msgpack — MessagePack serialization.std::encoding::protobuf — Protocol Buffers message construction.std::encoding::toml — TOML parsing and generation.std::encoding::utf8 — Validating and lossy UTF-8 decoding with explicit byte-position errors.std::encoding::wire — Shared types of the data codecs, and the `#[wire]` schema layer.std::encoding::xml — XML parsing and manipulation.std::encoding::yaml — YAML values with automatic cleanup and independent copies.std::io::scanner — Line-by-line and word-by-word scanner (bufio.Scanner-style).std::machines::toggle — Minimal cross-module Moore machine fixture.std::misc::log — Structured, leveled logging for Hew programs (slog-style).std::misc::uuid — UUID generation and validation.std::net::dns — DNS hostname resolution.std::net::http — HTTP server for handling web requests.std::net::http::http_async_client — HTTP/1.1 codec over ordinary `std.net` calls.std::net::http::http_async_server — HTTP/1.1 codec over ordinary `std.net` calls.std::net::http::http_client — HTTP client compatibility module for outbound requests.std::net::ipnet — IP address and CIDR utilities.std::net::mime — MIME type detection.std::net::quic — QUIC transport for internode messaging.std::net::smtp — SMTP client for sending email.std::net::tls — TLS client connections.std::net::url — URL parsing.std::net::websocket — WebSocket client and server for bidirectional communication.std::text::regex — Regular expression matching.std::text::semver — Semantic versioning — pure Hew implementation.std::text::template — Go-style text/template rendering.std::text::unicode — Unicode character classification and UTF-8 string helpers.std::time::cron — Cron expression parsing and scheduling.std::time::datetime — Date and time operations.