diff --git a/pkg/agentic/commands_plan.go b/pkg/agentic/commands_plan.go
index 9adcb33..0be0ae8 100644
--- a/pkg/agentic/commands_plan.go
+++ b/pkg/agentic/commands_plan.go
@@ -9,6 +9,7 @@ import (
 func (s *PrepSubsystem) registerPlanCommands() {
 	c := s.Core()
 	c.Command("plan", core.Command{Description: "Manage implementation plans", Action: s.cmdPlan})
+	c.Command("agentic:plan", core.Command{Description: "Manage implementation plans", Action: s.cmdPlan})
 	c.Command("plan/create", core.Command{Description: "Create an implementation plan or create one from a template", Action: s.cmdPlanCreate})
 	c.Command("plan/from-issue", core.Command{Description: "Create an implementation plan from a tracked issue", Action: s.cmdPlanFromIssue})
 	c.Command("plan/list", core.Command{Description: "List implementation plans", Action: s.cmdPlanList})
diff --git a/pkg/agentic/commands_plan_test.go b/pkg/agentic/commands_plan_test.go
index d9d8a73..37fba67 100644
--- a/pkg/agentic/commands_plan_test.go
+++ b/pkg/agentic/commands_plan_test.go
@@ -125,3 +125,13 @@ func TestCommandsPlan_HandlePlanCheck_Good_CompletePlan(t *testing.T) {
 	assert.True(t, output.Complete)
 	assert.Equal(t, plan.Slug, output.Plan.Slug)
 }
+
+func TestCommandsPlan_RegisterPlanCommands_Good_SpecAliasRegistered(t *testing.T) {
+	c := core.New(core.WithOption("name", "test"))
+	s := &PrepSubsystem{ServiceRuntime: core.NewServiceRuntime(c, AgentOptions{})}
+
+	s.registerPlanCommands()
+
+	assert.Contains(t, c.Commands(), "agentic:plan")
+	assert.Contains(t, c.Commands(), "plan")
+}
diff --git a/pkg/agentic/prep_test.go b/pkg/agentic/prep_test.go
index 0025df2..002ae12 100644
--- a/pkg/agentic/prep_test.go
+++ b/pkg/agentic/prep_test.go
@@ -620,6 +620,7 @@ func TestPrep_OnStartup_Good_RegistersGenerateCommand(t *testing.T) {
 	require.True(t, s.OnStartup(context.Background()).OK)
 	assert.Contains(t, c.Commands(), "generate")
 	assert.Contains(t, c.Commands(), "complete")
+	assert.Contains(t, c.Commands(), "agentic:plan")
 	assert.Contains(t, c.Commands(), "prep-workspace")
 	assert.Contains(t, c.Commands(), "brain/ingest")
 	assert.Contains(t, c.Commands(), "brain/seed-memory")