Move shorter API guide sections before module options

api_guide.md

@@ -46,6 +46,36 @@ If you need access to module args, you can write it as bellow:
 }
 ```
 
+## Module arguments
+
+The following module arguments are available:
+
+- `src`: The flake's source directory
+- `lib`: nixpkgs lib attribute
+- `config`: configured option values
+- `options`: available options
+- `flakelight`: flakelight lib attribute
+- `inputs`: value of inputs option
+- `outputs`: resulting output (i.e. final flake attributes)
+- `autoloadArgs`: arguments passed to supported autoloaded files
+
+## Additional pkgs values
+
+Functions that take the package set as an argument, such as package definitions
+or `perSystem` values, have several additional values available in the package
+set.
+
+The `src`, `inputs`, `outputs`, and `flakelight` attributes are the same as the
+above module arguments.
+
+`inputs'` and `outputs'` are transformed versions of `inputs` and `outputs` with
+system preselected. I.e., `inputs.emacs-overlay.packages.x86_64-linux.default`
+can be accessed as `inputs'.emacs-overlay.packages.default`.
+
+`defaultMeta` is a derivation meta attribute set generated from options. Modules
+setting `packages.default` should use this to allow meta attributes to be
+configured.
+
 ## Module options
 
 This section covers the options available to modules.
@@ -726,32 +756,3 @@ check that is added if editorconfig configuration is detected.
 
 `flakelight.builtinFormatters` can be set to false to disable the default
 formatting configuration.
-
-## Module arguments
-
-The following module arguments are available:
-
-- `src`: The flake's source directory
-- `lib`: nixpkgs lib attribute
-- `config`: configured option values
-- `options`: available options
-- `flakelight`: flakelight lib attribute
-- `inputs`: value of inputs option
-- `outputs`: resulting output (i.e. final flake attributes)
-- `autoloadArgs`: arguments passed to supported autoloaded files
-
-## Additional pkgs values
-
-For functions that take package arguments, several additional values are
-available in the package set.
-
-The `src`, `inputs`, `outputs`, and `flakelight` attributes are the same as the
-above module arguments.
-
-`inputs'` and `outputs'` are transformed versions of `inputs` and `outputs` with
-system preselected. I.e., `inputs.emacs-overlay.packages.x86_64-linux.default`
-can be accessed as `inputs'.emacs-overlay.packages.default`.
-
-`defaultMeta` is a derivation meta attribute set generated from options. Modules
-setting `packages.default` should use this to allow meta attributes to be
-configured.