Stdlib module `encoding/hex.vitl`

This page is a wiki-style reference for one concrete stdlib file. It explains what the file owns, where it fits in the family, and how to decide whether this is the right surface to depend on.

Visual portrait of encoding/hex.vitl — Wiki-style portrait for `encoding/hex.vitl`.

Family: encoding

Kind: public stdlib surface

Page style: this reference follows the same “encyclopedic card + portrait + usage contract” logic as the keyword pages, but for stdlib modules.

Overview

Field	Value
Path	`encoding/hex.vitl`
Family	`encoding`
Kind	public stdlib surface
Line count	23
Declared procedures	4
Declared forms/picks	0

`encoding/hex.vitl` is a public stdlib surface inside the `encoding` family. It should be read as one focused slice of the broader family responsibility: Text and byte encoding surfaces such as utf, base64, url, hex, html, legacy encodings, and unicode helpers.

Purpose

This file should be chosen because of responsibility, not because its name “sounds close enough”. Inside the encoding family, it carries one focused part of the contract and keeps that responsibility separate from neighboring concerns.

A JSON payload can be rendered first, then base64-encoded for transport.
A path or URL can be normalized before joining it with host-facing code.

Top-level API inventory

Surface	Items
Procedures	`encode_hex`, `decode_hex`, `encode_hex_upper`, `is_valid_hex`
Forms	none declared at top level
Picks	none declared at top level
Constants	none declared at top level

Imported surfaces

This file does not advertise a top-level `use` surface in its opening declarations. That often means it is either self-contained or an aggregation layer.

How to use this module

Start by reading the file as an ownership boundary. Ask three questions: what enters this module, what stable types or procedures it exports, and what adjacent module should stay outside of it.

Open the family page first to understand why this area of the stdlib exists.
Read the source excerpt below to see the namespace, imports, and first declared surfaces.
Check the neighbor list to avoid coupling this module with an adjacent responsibility by habit.

Source shape

space vitte/stdlib_checked/encoding_hex
proc encode_hex() -> int {
  give 0
}
proc decode_hex() -> int {
  give 0
}
proc encode_hex_upper() -> int {
  give 0
}

The excerpt is not meant to replace the file. It exists to make the module recognizable at first glance, the same way a Wikipedia infobox helps the reader orient before reading the whole article.

Integration boundaries

Within encoding, this file should remain focused. If a future helper changes the host boundary, scheduling boundary, or data-shape boundary, it probably belongs in a neighbor module instead of being added here by convenience.

Family responsibility: Text and byte encoding surfaces such as utf, base64, url, hex, html, legacy encodings, and unicode helpers.
Family architecture role: Use `encoding` when values cross a textual or byte-oriented boundary and representation matters.

Stdlib module encoding/hex.vitl