Add --ontology-file support for custom domain YAMLs

README.md

@@ -303,6 +303,7 @@ Arguments:
 
 Options:
   --domain TEXT             Domain ID (e.g., healthcare, gaming)
+  --ontology-file PATH      Path to a custom domain ontology YAML file
   --framework TEXT          Agent framework (strands [default], pydanticai, claude-agent-sdk, openai-agents, langgraph, crewai, google-adk, anthropic-tools)
   --self-hosted             Use self-hosted Neo4j (bolt) instead of NAMS hosted memory
   --nams-api-key TEXT       NAMS API key [env: MEMORY_API_KEY] — obtain at https://memory.neo4jlabs.com

src/create_context_graph/cli.py

@@ -133,6 +133,11 @@ def _run_import_preview(
     type=str,
     help="Domain ID (e.g., financial-services, healthcare, software-engineering)",
 )
+@click.option(
+    "--ontology-file",
+    type=click.Path(exists=True, dir_okay=False, path_type=Path),
+    help="Path to a custom domain ontology YAML file",
+)
 @click.option(
     "--framework",
     type=click.Choice(SUPPORTED_FRAMEWORKS, case_sensitive=False),
@@ -199,6 +204,7 @@ def _run_import_preview(
 def main(
     project_name: str | None,
     domain: str | None,
+    ontology_file: Path | None,
     framework: str | None,
     demo_data: bool,
     ingest: bool,
@@ -315,9 +321,31 @@ def main(
         console.print()
         return
 
+    domain_source_count = sum(
+        bool(source) for source in (domain, ontology_file, custom_domain)
+    )
+    if domain_source_count > 1:
+        console.print(
+            "[red]Error:[/red] --domain, --ontology-file, and --custom-domain "
+            "are mutually exclusive."
+        )
+        raise SystemExit(1)
+
     # Handle custom domain generation (non-interactive)
     custom_domain_yaml = None
     custom_ontology = None
+    if ontology_file:
+        from create_context_graph.ontology import load_domain_from_path
+
+        try:
+            custom_domain_yaml = ontology_file.read_text()
+            custom_ontology = load_domain_from_path(ontology_file)
+        except Exception as e:  # noqa: BLE001 — surface YAML/schema errors to the user
+            console.print(f"[red]Error:[/red] Failed to load ontology file: {e}")
+            raise SystemExit(1)
+
+        domain = custom_ontology.domain.id
+
     if custom_domain:
         if not anthropic_api_key:
             console.print("[red]Error:[/red] --anthropic-api-key is required for custom domain generation.")
@@ -368,16 +396,16 @@ def main(
         raise SystemExit(1)
 
     # Auto-generate project name when all required flags are provided but no positional arg
-    if not project_name and (domain or custom_domain) and framework:
+    if not project_name and (domain or custom_domain or ontology_file) and framework:
         domain_part = domain or "custom"
         project_name = f"{domain_part}-{framework}-app"
 
     # Non-TTY detection: give a helpful error when wizard would be required but stdin isn't interactive
     import sys
     if not project_name and not sys.stdin.isatty():
         missing = []
-        if not domain and not custom_domain:
-            missing.append("--domain")
+        if not domain and not custom_domain and not ontology_file:
+            missing.append("--domain, --ontology-file, or --custom-domain")
         if not framework:
             missing.append("--framework")
         console.print(f"[red]Error:[/red] Non-interactive mode requires: {', '.join(missing or ['--domain and --framework'])}")
@@ -388,7 +416,7 @@ def main(
     # If all required args are provided (and a backend is determinable), skip wizard.
     # In non-interactive mode with default NAMS backend, --nams-api-key (or
     # MEMORY_API_KEY env) must be set unless --self-hosted is specified.
-    if project_name and (domain or custom_domain) and (framework or DEFAULT_FRAMEWORK):
+    if project_name and (domain or custom_domain or ontology_file) and (framework or DEFAULT_FRAMEWORK):
         # Skip the credential gate during --dry-run so users can preview a
         # scaffold without first signing up for a NAMS API key.
         if not dry_run and memory_backend_resolved == "nams" and not nams_api_key:

src/create_context_graph/ontology.py

@@ -241,6 +241,27 @@ def load_domain(domain_id: str) -> DomainOntology:
     domains_dir = _get_domains_path()
     domain_path = domains_dir / f"{domain_id}.yaml"
 
+    if not domain_path.exists():
+        custom_dir = _get_custom_domains_path()
+        custom_path = custom_dir / f"{domain_id}.yaml"
+        if custom_path.exists():
+            domain_path = custom_path
+        elif custom_dir.exists():
+            for path in sorted(custom_dir.glob("*.yaml")):
+                if path.stem.startswith("_"):
+                    continue
+                try:
+                    with open(path) as f:
+                        data = yaml.safe_load(f)
+                except Exception:
+                    continue
+                if (
+                    isinstance(data, dict)
+                    and data.get("domain", {}).get("id") == domain_id
+                ):
+                    domain_path = path
+                    break
+
     if not domain_path.exists():
         raise FileNotFoundError(f"Domain ontology not found: {domain_id}")
 

tests/test_cli.py

@@ -15,6 +15,7 @@
 """Integration tests for the CLI module."""
 
 import json
+from pathlib import Path
 
 import pytest
 
@@ -76,6 +77,54 @@ def test_scaffold_with_demo_data(self, runner, tmp_path):
         data = json.loads(fixture.read_text())
         assert len(data["entities"]) > 0
 
+    def test_scaffold_with_ontology_file(self, runner, tmp_path):
+        ontology_file = Path("src/create_context_graph/domains/healthcare.yaml")
+        out = tmp_path / "ontology-app"
+
+        result = runner.invoke(main, [
+            "ontology-app",
+            "--ontology-file", str(ontology_file),
+            "--framework", "pydanticai",
+            "--output-dir", str(out),
+        ])
+
+        assert result.exit_code == 0, result.output
+        assert (out / "backend" / "app" / "main.py").exists()
+        assert (out / "frontend" / "package.json").exists()
+        assert (
+            (out / "data" / "ontology.yaml").read_text()
+            == ontology_file.read_text()
+        )
+
+    def test_ontology_file_auto_generates_project_name(self, runner, tmp_path):
+        ontology_file = Path("src/create_context_graph/domains/healthcare.yaml")
+        out = tmp_path / "dry-run-app"
+
+        result = runner.invoke(main, [
+            "--ontology-file", str(ontology_file),
+            "--framework", "pydanticai",
+            "--output-dir", str(out),
+            "--dry-run",
+        ])
+
+        assert result.exit_code == 0, result.output
+        assert "healthcare-pydanticai-app" in result.output
+
+    def test_ontology_file_is_mutually_exclusive_with_domain(self, runner, tmp_path):
+        ontology_file = Path("src/create_context_graph/domains/healthcare.yaml")
+        out = tmp_path / "my-app"
+
+        result = runner.invoke(main, [
+            "my-app",
+            "--domain", "healthcare",
+            "--ontology-file", str(ontology_file),
+            "--framework", "pydanticai",
+            "--output-dir", str(out),
+        ])
+
+        assert result.exit_code == 1
+        assert "mutually exclusive" in result.output
+
     def test_invalid_domain(self, runner, tmp_path):
         out = tmp_path / "my-app"
         result = runner.invoke(main, [

tests/test_custom_domain.py

@@ -32,6 +32,7 @@
 from create_context_graph.ontology import (
     DomainOntology,
     list_available_domains,
+    load_domain,
     load_domain_from_yaml_string,
 )
 
@@ -479,3 +480,18 @@ def test_list_includes_saved_custom(self, tmp_path):
             domains = list_available_domains()
             ids = [d["id"] for d in domains]
             assert "test-domain" in ids
+
+    def test_load_domain_finds_saved_custom_by_domain_id(self, tmp_path):
+        """Saved custom domains can be loaded by the ID declared in YAML."""
+        custom_dir = tmp_path / "custom-domains"
+        custom_dir.mkdir()
+        (custom_dir / "my-custom.yaml").write_text(VALID_DOMAIN_YAML)
+
+        with patch(
+            "create_context_graph.ontology._get_custom_domains_path",
+            return_value=custom_dir,
+        ):
+            ontology = load_domain("test-domain")
+
+        assert ontology.domain.id == "test-domain"
+        assert ontology.domain.name == "Test Domain"