$ sbx env plan --env-arg greeting=servus ./fixtures/env
── LOAD ENVIRONMENT
   reading environment file…
     $CAPTURE/fixtures/env/sbxenv.yaml
   ✓ environment loaded
── ENVIRONMENT PLAN
   m101-env

   kits:
+    - source: $CAPTURE/fixtures/kits/hello-mixin

   workspace:  (present, not recorded as applied, needs your approval)
     path: $CAPTURE/fixtures/env

   env:
+    GREETING: servus

+  sandbox:
+    name: m101-env
+    agent: shell

   ports:
+    - sandbox: 8080
+      protocol: tcp4
+      host: 18083

   lifecycle:
     initialize:
+      - command: echo init
+        workdir: $CAPTURE/fixtures/env
+        envFiles:
+          - $CAPTURE/fixtures/env/sbxenv.yaml

   Plan: + 5 to add, ~ 0 to change, - 0 to destroy.

   this plan runs commands on this machine, outside the sandbox, with your own privileges
   ✓ not approved yet; applying asks once
[exit 0]