add decorator for cli context

CONTRIBUTING.md

@@ -9,8 +9,8 @@ Prerequisites:
 ```shell
 # Arch Linux
 pacman -S uv just
-# optinal
-pacman -S just-lsp yamlfmt shellcheck
+# optional
+pacman -S just-lsp yamlfmt shellcheck typos
 ```
 
 The development environment and testing requires multiple specific Python versions; they can be installed with (inside the pulled git project directory):
@@ -31,13 +31,13 @@ just test
 
 ## Formatting
 
-Formatting of YAML files requires [yamlfmt](https://github.com/google/yamlfmt) to be installed seperately.
+Formatting of YAML files requires [yamlfmt](https://github.com/google/yamlfmt) to be installed separately.
 
 A script is available to run the format check.
 
 ```shell
 just format-check
-just schema-scheck
+just schema-check
 ```
 
 ## Linting
@@ -45,6 +45,7 @@ just schema-scheck
 Linting requires [shellcheck](https://github.com/koalaman/shellcheck) to be installed separately.
 Validating `pyproject.toml` against the checked-in uv schema also requires
 [jq](https://jqlang.org/).
+Spell checking requires [typos](https://github.com/crate-ci/typos) to be installed separately.
 
 A script is available to run the lint check.
 
@@ -55,9 +56,8 @@ just type-check
 
 ## Documentation
 
-A script is available to run the documentaion generation.
+A script is available to run the documentation generation.
 
 ```shell
 just docs
-just man
 ```