diff --git a/data/scripts/o b/data/scripts/o
index d8f2f33..86be117 100755
--- a/data/scripts/o
+++ b/data/scripts/o
@@ -266,15 +266,28 @@ cmd_new() {
         printf 'name=%s\ncwd=%s\n' "$agent_name" "$agent_cwd" | ollie-9p write "${PREFIX}/agent/new"
         echo "created agent: $CTX_SESSION/$agent_name"
     else
-        # Create session at root
+        # Create session and agent: o new sname/aname [cwd]
         if [[ $# -lt 1 ]]; then
-            echo "usage: o new <session> [cwd]" >&2
+            echo "usage: o new <session>/<agent> [cwd]" >&2
             exit 1
         fi
-        local session_name="$1"
-        local session_cwd="${2:-$PWD}"
-        printf 'name=%s\ncwd=%s\n' "$session_name" "$session_cwd" | ollie-9p write "session/new"
-        echo "created session: $session_name"
+        local spec="$1"
+        local cwd="${2:-$PWD}"
+
+        if [[ "$spec" != */* ]]; then
+            echo "usage: o new <session>/<agent> [cwd]" >&2
+            echo "error: must specify session/agent (e.g., work/code)" >&2
+            exit 1
+        fi
+
+        local session_name="${spec%%/*}"
+        local agent_name="${spec#*/}"
+
+        # Create session
+        printf 'name=%s\ncwd=%s\n' "$session_name" "$cwd" | ollie-9p write "session/new"
+        # Create agent in that session
+        printf 'name=%s\ncwd=%s\n' "$agent_name" "$cwd" | ollie-9p write "session/$session_name/agent/new"
+        echo "created: $session_name/$agent_name"
     fi
 }