Add self-scoping assessment export command

tests/test_cli.py

@@ -1,3 +1,5 @@
+import json
+
 import pytest
 
 from repo_registry.cli import main
@@ -98,3 +100,34 @@ def test_rebuild_cli_refuses_destructive_all_without_confirm_all(tmp_path):
         )
 
     assert exc.value.code == 2
+
+
+def test_export_assessment_cli_writes_completed_run_artifact(tmp_path):
+    service = make_service(tmp_path)
+    source = write_repo(tmp_path)
+    repository = service.register_repository(name="CLI Export", url=str(source))
+    summary = service.analyze_repository(repository.id, use_llm_assistance=False)
+    output_path = tmp_path / "assessment.json"
+
+    exit_code = main(
+        [
+            "export-assessment",
+            "--repo",
+            str(repository.id),
+            "--analysis-run",
+            str(summary.analysis_run.id),
+            "--output",
+            str(output_path),
+            "--database-path",
+            str(tmp_path / "registry.sqlite3"),
+            "--checkout-root",
+            str(tmp_path / "checkouts"),
+        ]
+    )
+
+    artifact = json.loads(output_path.read_text(encoding="utf-8"))
+    assert exit_code == 0
+    assert artifact["target_repository"]["repo_slug"] == "cli-export"
+    assert artifact["execution"]["analysis_run_id"] == summary.analysis_run.id
+    assert artifact["assessment"]["role"] == "challenger"
+    assert artifact["generated_tree"]["abilities"]