refactor: use ProjectConfig model for init command YAML output

hokusai/cli.py

@@ -9,10 +9,11 @@ from typing import Annotated, override
 
 import click
 import typer
+import yaml
 from typer.core import TyperGroup
 
 from hokusai.builder import BuildEvent, BuildResult, run_build
-from hokusai.config import ProjectConfig, load_config
+from hokusai.config import GenerateTargetConfig, ProjectConfig, load_config
 from hokusai.graph import build_graph, get_build_order
 from hokusai.providers.registry import get_all_models
 from hokusai.state import state_filename
@@ -255,16 +256,25 @@ def init() -> None:
         )
         raise typer.Exit(code=1)
 
-    content = f"""\
-# {name} - hokusai project
-targets:
-  great_wave.png:
-    prompt: >-
-      A recreation of Hokusai's "The Great Wave off Kanagawa", but instead of
-      boats and people, paint brushes, canvases, and framed paintings are
-      swimming and tumbling in the towering wave.
-"""
-    _ = dest.write_text(content)
+    config = ProjectConfig(
+        targets={
+            "great_wave.png": GenerateTargetConfig(
+                prompt=(
+                    'A recreation of Hokusai\'s "The Great Wave off Kanagawa",'
+                    " but instead of boats and people, paint brushes, canvases,"
+                    " and framed paintings are swimming and tumbling in the"
+                    " towering wave."
+                ),
+            ),
+        },
+    )
+    header = f"# {name} - hokusai project\n"
+    body = yaml.dump(
+        config.model_dump(exclude_defaults=True),
+        default_flow_style=False,
+        sort_keys=False,
+    )
+    _ = dest.write_text(header + body)
     click.echo(click.style("  created ", fg="green") + click.style(filename, bold=True))