Document main-relative companion loading

docs/consumers/README.md

@@ -38,8 +38,8 @@ Start with one file, then choose the tasks your application needs:
 - Use `LoadLayered` when several inputs should supply lower-priority defaults
   beneath the main source. Each underlay group combines its inputs strictly.
   Each [`Input`](../../layered.go) owns its source, filesystem, destination, and
-  import choice. The overlay filesystem context is selected independently in
-  [`LayeredOptions`](../../layered.go).
+  import choice. Main-relative bindings and overlay context selection are
+  available in [`LayeredOptions`](../../layered.go).
 - Load-wide rules belong to [`Options`](../../lifecycle.go) or
   [`LayeredOptions`](../../layered.go): the application definition (including
   version policy), import defaults, and explicit overrides. These do not turn
@@ -53,6 +53,8 @@ file and layered cases. For import-focused adoption, see the
 [prompt catalog](../../examples/consumers/prompt_catalog.go); for explicit
 discovery composed with sequences, see the
 [sequence catalog](../../examples/consumers/sequence_catalog.go).
+For discovered main files with companion imports and an overlay, see the
+[main-relative example](../../examples/consumers/main_relative.go).
 
 ## Happy path