Overview

std is the PekoScript standard library. It is a normal package, but it is installed once at the global Peko root when the toolchain is set up, so projects never list it as a dependency and its version tracks the installed compiler.

Modules are reached through the std:: prefix once imported:

import std::fs;

let text: string? = fs::read_file(path)

Several modules are already imported for you. That list is on the next page and is worth reading before anything else, because it decides whether a name is spelled Array, json::parse, or needs an import first.

What is here

Module	Purpose
core	The object model, the value types, and the traits behind the operators.
collections	Arrays, maps, ordered maps, string building, pairs.
io	Console and file-descriptor input and output.
fs	Files, directories, handles, buffered reads and writes.
json	A JSON value tree, a parser, and the JSON serializer.
xml	An element tree with attributes, children, and rendering.
crypto	Hashing, AEAD, signatures, password hashing, encoding.
sockets	TCP, HTTP and HTTPS, WebSocket clients and servers.
threads	Threads, mutexes, channels, futures, cancellation.
process	Spawning child processes and streaming their output.
random	Fast non-cryptographic random numbers.
lexer	A small general tokenizer.
runtime	Allocation and the garbage collector boundary.
bundle	Compile-time project metadata.

Two habits worth forming early

Most calls that can fail return an optional rather than a sentinel, so the empty case is impossible to ignore:

let content: string? = fs::read_file(path)
if !content.is_value() {
    return None
}

But not all of them. A handful return a sentinel value instead, and those are the ones that cause bugs, because nothing forces you to check. The Optionals and sentinels page lists every one.