456: catalog update nox task descriptions

.github/workflows/slow-checks.yml

@@ -20,6 +20,7 @@ jobs:
     permissions:
       contents: read
     env:
+      # Required for integration tests that call the GitHub CLI.
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     strategy:
       fail-fast: false

doc/changes/unreleased.md

@@ -2,6 +2,12 @@
 
 ## Summary
 
+This release documents how to discover and use PTB's Nox sessions in the user
+guide and removes the unused Modules section from the developer guide.
+
+## Documentation
+
+* #456: Documented how to discover PTB nox sessions in the user guide and removed the unused developer-guide Modules section
 ## Bug
 
 * #909: Updated `cd.yml` workflow so that `cd-extension.yml` workflow depends on `build-and-publish`. This ensures that the custom release workflow only runs when the PyPi release was successful.

doc/developer_guide/developer_guide.rst

@@ -9,4 +9,3 @@
 
     ../design
     plugins
-    modules/modules

doc/user_guide/features/index.rst

@@ -37,3 +37,17 @@ Important Nox Commands
 
 * :code:`nox -l` shows a list of all available nox sessions
 * :code:`nox -s <session>` run the specified session(s)
+
+The command :code:`nox -l` is the most reliable way to see the full current
+session list for your project.
+
+Common examples are:
+
+* :code:`nox -s format:fix` to apply formatting changes
+* :code:`nox -s project:check` to run the main local quality gate
+* :code:`nox -s test:unit` to run unit tests
+* :code:`nox -s workflow:generate -- all` to regenerate PTB workflows
+
+Use the feature pages in this guide for task-specific details, for example
+formatting, GitHub workflows, dependency management, release preparation, and
+code-quality reporting.