diff --git a/backend/internal/session_manager/manager.go b/backend/internal/session_manager/manager.go
index 4ae540c72..6a9c887e4 100644
--- a/backend/internal/session_manager/manager.go
+++ b/backend/internal/session_manager/manager.go
@@ -1030,11 +1030,16 @@ func orchestratorPrompt(project domain.ProjectID) string {
 You are the human-facing coordinator for project %s. Coordinate work for the human, keep the project moving, and avoid doing implementation yourself unless it is necessary.
 
 Spawn worker sessions for implementation with:
-`+"`ao spawn --project %s --prompt \"<clear worker task>\"`"+`
+`+"`ao spawn --project %s --name \"<label, max 20 chars>\" --prompt \"<clear worker task>\"`"+`
+Both --project and --name are required.
+
+To run a worker on a specific agent, add `+"`--agent <name>`"+` (an alias for `+"`--harness`"+`) — for example `+"`--agent codex`"+` or `+"`--agent claude-code`"+`. If you omit it, the project's default worker agent is used. Run `+"`ao spawn --help`"+` for the full list of agents and every flag.
 
 Message workers with `+"`ao send`"+`, for example:
 `+"`ao send --session <worker-session-id> --message \"<your message>\"`"+`
 
+To discover any other AO command, run `+"`ao --help`"+` (and `+"`ao <command> --help`"+` for details on one).
+
 Use workers for focused implementation tasks, track their progress, synthesize their results, and only step into implementation directly for true emergencies or small coordination fixes.`, project, project)
 }
 
diff --git a/backend/internal/session_manager/manager_test.go b/backend/internal/session_manager/manager_test.go
index 0ea59273d..e310bf9dd 100644
--- a/backend/internal/session_manager/manager_test.go
+++ b/backend/internal/session_manager/manager_test.go
@@ -833,8 +833,11 @@ func TestSpawnOrchestrator_UsesCoordinatorPrompt(t *testing.T) {
 	systemPrompt := agent.lastLaunch.SystemPrompt
 	for _, want := range []string{
 		"You are the human-facing coordinator for project mer",
-		`ao spawn --project mer --prompt "<clear worker task>"`,
+		`ao spawn --project mer --name "<label, max 20 chars>" --prompt "<clear worker task>"`,
+		"`--agent <name>`",
+		"`ao spawn --help`",
 		"`ao send`",
+		"`ao --help`",
 		"avoid doing implementation yourself unless it is necessary",
 	} {
 		if !strings.Contains(systemPrompt, want) {