feat(harness): tht ollama ensure CLI command (hard-fail preflight)

harness/tests/test_ollama_ensure.py

@@ -138,3 +138,44 @@ def test_initial_probe_exception_is_server_error():
         warm=lambda cfg: None,
     )
     assert r["ok"] is False and r["stage"] == "server"
+
+
+import json as _json
+
+from typer.testing import CliRunner
+
+from tht.cli.ollama_cmd import ollama_app
+from tht.cli import ollama_cmd
+
+
+def _patch(monkeypatch, result):
+    monkeypatch.setattr(ollama_cmd, "_load_config_or_exit", lambda _c: SimpleNamespace(embeddings=object()))
+    monkeypatch.setattr(ollama_cmd, "ensure_ollama", lambda cfg, **kw: result)
+
+
+def test_cli_ok_exit_zero_and_json_pristine(monkeypatch):
+    _patch(monkeypatch, {"ok": True, "server": "up", "model": "warmed", "model_name": "m"})
+    res = CliRunner().invoke(ollama_app, ["--json"])
+    assert res.exit_code == 0, res.output
+    assert _json.loads(res.output) == {"ok": True, "server": "up", "model": "warmed", "model_name": "m"}
+
+
+def test_cli_error_exit_one_and_json_on_stdout(monkeypatch):
+    _patch(monkeypatch, {"ok": False, "stage": "model", "error": "missing"})
+    res = CliRunner().invoke(ollama_app, ["--json"])
+    assert res.exit_code == 1
+    assert _json.loads(res.output) == {"ok": False, "stage": "model", "error": "missing"}
+
+
+def test_cli_error_human_mode_exit_one(monkeypatch):
+    _patch(monkeypatch, {"ok": False, "stage": "server", "error": "down"})
+    res = CliRunner().invoke(ollama_app, [])
+    assert res.exit_code == 1
+
+
+def test_cli_registered_on_root_app():
+    from tht.cli import app  # the root Typer app
+    runner = CliRunner()
+    res = runner.invoke(app, ["ollama", "--help"])
+    assert res.exit_code == 0
+    assert "ensure" in res.output