# Typos: Spell Checker

`typos` is an extremely fast source code and documentation spell checker written in Rust by the crate-ci team.

## What It Does

`typos` is a low-overhead spell checker that evaluates multi-language repositories. Designed with code-aware tokenization, it respects camelCase, snake\_case, and kebab-case identifiers while referencing a curated technical dictionary to eliminate false positives.

It scans source files, docstrings, markdown guides, configuration manifests, and commit messages across the entire tree, applying automated in-place fixes via `typos -w`.

## Why It's in Zenith

Spelling errors in public API identifiers, command-line arguments, or documentation erode user trust. Zenith integrates `typos` to maintain professional polish across all repository assets.

Because `typos` scans the entire repository in under 50 milliseconds, it runs on every pre-commit check and CI workflow without noticeable overhead or the false-positive noise common in legacy spell checkers.

## Configuration in Zenith

Configured in `typos.toml` at the project root:

```toml
# ==============================================================================
# Typos Configuration (typos.toml)
#
# Tool: Typos (https://github.com/crate-ci/typos)
# Purpose: Source code and documentation spell checker written in Rust.
# Why it's in Zenith: Blazingly fast spell checker that catches spelling errors
# in code, docstrings, markdown, and configs before they reach production.
# ==============================================================================

[default]
    extend-ignore-re = [
        "(?Rm)^.*(#|//)\\s*(spellchecker:disable-line|codespell:ignore)\\s*$",
    ]

    [default.extend-words]
        CPY    = "CPY"
        Ines   = "Ines"
        ment   = "ment"
        utiliz = "utiliz"

[files]
    extend-exclude = ["*.ambr", "*.min.js", "*.svg", "build", "dist", "site"]
```

## Key Invocations

```bash
uv run typos                 # Scan repository for spelling errors
uv run typos -w              # Automatically fix detected typos in place
uv run poe typos             # Wired quality check task in Poe
uv run poe typos-fix         # Wired auto-fixing task in Poe
```

## Upstream Documentation

- [typos GitHub Repository](<https://github.com/crate-ci/typos>)