feat: add versioned execution profiles

tests/test_cli.py

@@ -0,0 +1,21 @@
+import json
+from pathlib import Path
+
+from glas_harness.cli import main
+from glas_harness.contract import ExecutionRequest
+
+
+def test_profiles_command_lists_committed_constellations(capsys) -> None:
+    assert main(["profiles", "--json"]) == 0
+
+    rows = json.loads(capsys.readouterr().out)
+    assert {row["rein_id"] for row in rows} == {"rein-aharness", "rein-openweights"}
+
+
+def test_execution_request_example_matches_contract() -> None:
+    fixture = Path(__file__).resolve().parents[1] / "examples" / "execution-request.json"
+
+    request = ExecutionRequest.model_validate_json(fixture.read_text())
+
+    assert request.harness_profile_ref == "harness.agent-dev-local@1.0.0"
+    assert request.assignment_ref == "role-assignment:agent-7:42"