Inject ambient context into Go calls

README.md

@@ -304,6 +304,21 @@ Use `coroutineContext()` only at Go interop boundaries that require a
 `context.Context`; it returns the ambient scope context without exposing it in
 the Gotlin function signature.
 
+For conventional Go APIs whose first parameter is `context.Context`, Gotlin
+normally injects that ambient context automatically when the argument is
+omitted:
+
+```kotlin
+fun command(): *exec.Cmd {
+    return exec.commandContext("date")
+}
+```
+
+The function becomes contextually effectful and lowers to
+`exec.CommandContext(gotlinScope.Context(), "date")`. Passing an explicit
+context remains supported and suppresses injection, which is important for HTTP
+request contexts and deliberately detached work.
+
 ```kotlin
 fun load(): Int {
     delay(10)