Document working directory (#2053)

README.md

@@ -755,6 +755,31 @@ $ just --list --list-heading ''
     build
 ```
 
+### Working Directory
+
+By default, recipes run with the working directory set to the directory that
+contains the `justfile`.
+
+The `[no-cd]` attribute can be used to make recipes run with the working
+directory set to directory in which `just` was invoked.
+
+```just
+@foo:
+  pwd
+
+[no-cd]
+@bar:
+  pwd
+```
+
+```sh
+$ cd subdir
+$ just foo
+/
+: just bar
+/subdir
+```
+
 ### Aliases
 
 Aliases allow recipes to be invoked on the command line with alternative names: