diff --git a/README.md b/README.md
index 9e20c274c..5260e8388 100644
--- a/README.md
+++ b/README.md
@@ -208,11 +208,11 @@ gitnexus wiki --model <model>    # Wiki with custom LLM model (default: gpt-4o-m
 gitnexus wiki --base-url <url>   # Wiki with custom LLM API base URL
 
 # Repository groups (multi-repo / monorepo service tracking)
-gitnexus group create <name>     # Create a repository group
-gitnexus group add <name> <repo> # Add a repo to a group
-gitnexus group remove <name> <repo> # Remove a repo from a group
-gitnexus group list [name]       # List groups, or show one group's config
-gitnexus group sync <name>       # Extract contracts and match across repos/services
+gitnexus group create <name>                                   # Create a repository group
+gitnexus group add <group> <groupPath> <registryName>          # Add a repo to a group. <groupPath> is a hierarchy path (e.g. hr/hiring/backend); <registryName> is the repo's name from the registry (see `gitnexus list`)
+gitnexus group remove <group> <groupPath>                      # Remove a repo from a group by its hierarchy path
+gitnexus group list [name]                                     # List groups, or show one group's config
+gitnexus group sync <name>                                     # Extract contracts and match across repos/services
 gitnexus group contracts <name>  # Inspect extracted contracts and cross-links
 gitnexus group query <name> <q>  # Search execution flows across all repos in a group
 gitnexus group status <name>     # Check staleness of repos in a group
diff --git a/gitnexus/README.md b/gitnexus/README.md
index ed27bf728..26f861f7e 100644
--- a/gitnexus/README.md
+++ b/gitnexus/README.md
@@ -166,11 +166,11 @@ gitnexus wiki [path]             # Generate LLM-powered docs from knowledge grap
 gitnexus wiki --model <model>    # Wiki with custom LLM model (default: gpt-4o-mini)
 
 # Repository groups (multi-repo / monorepo service tracking)
-gitnexus group create <name>     # Create a repository group
-gitnexus group add <name> <repo> # Add a repo to a group
-gitnexus group remove <name> <repo> # Remove a repo from a group
-gitnexus group list [name]       # List groups, or show one group's config
-gitnexus group sync <name>       # Extract contracts and match across repos/services
+gitnexus group create <name>                                   # Create a repository group
+gitnexus group add <group> <groupPath> <registryName>          # Add a repo to a group. <groupPath> is a hierarchy path (e.g. hr/hiring/backend); <registryName> is the repo's name from the registry (see `gitnexus list`)
+gitnexus group remove <group> <groupPath>                      # Remove a repo from a group by its hierarchy path
+gitnexus group list [name]                                     # List groups, or show one group's config
+gitnexus group sync <name>                                     # Extract contracts and match across repos/services
 gitnexus group contracts <name>  # Inspect extracted contracts and cross-links
 gitnexus group query <name> <q>  # Search execution flows across all repos in a group
 gitnexus group status <name>     # Check staleness of repos in a group