docs: Add reference

README.md

@@ -8,9 +8,11 @@
 ![License](https://img.shields.io/crates/l/typos.svg)
 [![Crates Status](https://img.shields.io/crates/v/typos.svg)](https://crates.io/crates/typos)
 
+## [About](docs/about.md)
+
 ## [Install](docs/install.md)
 
-## [About](docs/about.md)
+## [Reference](docs/reference.md)
 
 ## [Contribute](CONTRIBUTING.md)
 

docs/reference.md

@@ -0,0 +1,29 @@
+# `typos` Reference
+
+## Configuration
+
+### Sources
+
+Configuration is read from the following (in precedence order)
+
+- Command line arguments
+- Either
+  - File specified via `--config PATH`
+  - Search parents of specified file / directory for `typos.toml`
+
+### Config Fields
+
+| Field                  | Argument          | Format | Description |
+|------------------------|-------------------|--------|-------------|
+| files.binary           | --binary          | bool   |   |
+| files.ignore-hidden    | --hidden          | bool   |   |
+| files.ignore-files     | --ignore          | bool   |   |
+| files.ignore-dot       | --ignore-dot      | bool   |   |
+| files.ignore-vcs       | --ignore-vcs      | bool   |   |
+| files.ignore-global    | --ignore-global   | bool   |   |
+| files.ignore-parent    | --ignore-parent   | bool   |   |
+| default.check-filename | \-                | bool   |   |
+| default.check-file     | \-                | bool   |   |
+| default.ignore-hex     | \-                | bool   |   |
+| default.identifier-include-digits   | \-   | bool   |   |
+| default.identifier-include-chars    | \-   | string |   |