[docs] Update documentation for features from 2026-03-13

docs/src/content/docs/reference/cross-repository.md

@@ -19,9 +19,21 @@ All require authentication beyond the default `GITHUB_TOKEN`, which is scoped to
 
 ## Cross-repository Checkout (`checkout:`)
 
-The `checkout:` frontmatter field controls how `actions/checkout` is invoked in the agent job. Configure custom checkout settings or check out multiple repositories.
+The `checkout:` frontmatter field controls how `actions/checkout` is invoked in the agent job. Configure custom checkout settings, check out multiple repositories, or disable checkout entirely.
 
-If only a the current repository, you can use `checkout:` to override default checkout settings (e.g., fetch depth, sparse checkout) without needing to define a custom job:
+### Disabling Checkout (`checkout: false`)
+
+Set `checkout: false` to suppress the default `actions/checkout` step entirely. Use this for workflows that access repositories through MCP servers or other mechanisms that do not require a local clone:
+
+```yaml wrap
+checkout: false
+```
+
+This is equivalent to omitting the checkout step from the agent job. Custom dev-mode steps (such as "Checkout actions folder") are unaffected.
+
+### Custom Checkout Settings
+
+If only using the current repository, you can use `checkout:` to override default checkout settings (e.g., fetch depth, sparse checkout) without needing to define a custom job:
 
 ```yaml wrap
 checkout:

docs/src/content/docs/reference/frontmatter-full.md

@@ -4915,9 +4915,14 @@ runtimes:
 # (optional)
 # This field supports multiple formats (oneOf):
 
-# Option 1: Single checkout configuration for the default workspace
+# Option 1: Disable checkout entirely (no actions/checkout step is injected).
+# Useful for workflows that access repositories via MCP servers or other
+# mechanisms that do not require a local clone.
+# checkout: false
 
-# Option 2: Multiple checkout configurations
+# Option 2: Single checkout configuration for the default workspace
+
+# Option 3: Multiple checkout configurations
 checkout: []
   # Array items: undefined
 

docs/src/content/docs/reference/frontmatter.md

@@ -610,7 +610,13 @@ if: github.event_name == 'push'
 
 Configure how `actions/checkout` is invoked in the agent job. Override default checkout settings or check out multiple repositories for cross-repository workflows.
 
-See [Cross-Repository Operations](/gh-aw/reference/cross-repository/) for complete documentation on checkout configuration options (including `fetch:`), merging behavior, and cross-repo examples.
+Set `checkout: false` to disable the default repository checkout entirely — useful for workflows that access repositories through MCP servers or other mechanisms that do not require a local clone:
+
+```yaml wrap
+checkout: false
+```
+
+See [Cross-Repository Operations](/gh-aw/reference/cross-repository/) for complete documentation on checkout configuration options (including `fetch:`, `checkout: false`), merging behavior, and cross-repo examples.
 
 ## Custom Steps (`steps:`)