diff --git a/stack_orchestrator/deploy/deployment_context.py b/stack_orchestrator/deploy/deployment_context.py
index 7f588774..ffe0f71f 100644
--- a/stack_orchestrator/deploy/deployment_context.py
+++ b/stack_orchestrator/deploy/deployment_context.py
@@ -44,11 +44,28 @@ class DeploymentContext:
     def get_compose_dir(self):
         return self.deployment_dir.joinpath(constants.compose_dir_name)
 
+    def get_compose_file(self, name: str):
+        return self.get_compose_dir() / f"docker-compose-{name}.yml"
+
+    def modify_yaml(self, file_path: Path, modifier_func):
+        """Load a YAML from the deployment, apply a modifier, and write back."""
+        if not file_path.absolute().is_relative_to(self.deployment_dir):
+            raise ValueError(f"File is not inside deployment directory: {file_path}")
+
+        yaml = get_yaml()
+        with open(file_path, "r") as f:
+            yaml_data = yaml.load(f)
+
+        modifier_func(yaml_data)
+
+        with open(file_path, "w") as f:
+            yaml.dump(yaml_data, f)
+
     def get_cluster_id(self):
         return self.id
 
-    def init(self, dir):
-        self.deployment_dir = dir
+    def init(self, dir: Path):
+        self.deployment_dir = dir.absolute()
         self.spec = Spec()
         self.spec.init_from_file(self.get_spec_file())
         self.stack = Stack(self.spec.obj["stack"])
diff --git a/stack_orchestrator/deploy/deployment_create.py b/stack_orchestrator/deploy/deployment_create.py
index 5988d2db..772fd02b 100644
--- a/stack_orchestrator/deploy/deployment_create.py
+++ b/stack_orchestrator/deploy/deployment_create.py
@@ -533,8 +533,11 @@ def _check_volume_definitions(spec):
 # TODO: Hack
 @click.option("--network-dir", help="Network configuration supplied in this directory")
 @click.option("--initial-peers", help="Initial set of persistent peers")
+@click.argument("extra_args", nargs=-1, type=click.UNPROCESSED)
 @click.pass_context
-def create(ctx, spec_file, deployment_dir, helm_chart, network_dir, initial_peers):
+def create(
+    ctx, spec_file, deployment_dir, helm_chart, network_dir, initial_peers, extra_args
+):
     deployment_command_context = ctx.obj
     return create_operation(
         deployment_command_context,
@@ -543,6 +546,7 @@ def create(ctx, spec_file, deployment_dir, helm_chart, network_dir, initial_peer
         helm_chart,
         network_dir,
         initial_peers,
+        extra_args,
     )
 
 
@@ -555,6 +559,7 @@ def create_operation(
     helm_chart,
     network_dir,
     initial_peers,
+    extra_args=(),
 ):
     parsed_spec = Spec(
         os.path.abspath(spec_file), get_parsed_deployment_spec(spec_file)
@@ -703,7 +708,7 @@ def create_operation(
     if deployer_config_generator is not None:
         deployer_config_generator.generate(deployment_dir_path)
     call_stack_deploy_create(
-        deployment_context, [network_dir, initial_peers, deployment_command_context]
+        deployment_context, [network_dir, initial_peers, *extra_args]
     )