feat(cli): add clean analysis export with markdown/json output

tests/test_cli.py

@@ -1,3 +1,4 @@
+import json
 from pathlib import Path
 from types import SimpleNamespace
 from unittest.mock import AsyncMock, MagicMock
@@ -444,3 +445,105 @@ def test_interactive_history_without_store_shows_hint(monkeypatch) -> None:  # t
 
     assert result.exit_code == 0
     assert "Session memory is disabled" in result.stdout
+
+
+def test_run_analyze_writes_output_file(monkeypatch, tmp_path: Path) -> None:  # type: ignore[no-untyped-def]
+    _mock_session(monkeypatch)
+
+    async def fake_collect_from_plan(_session, _plan) -> CollectionReport:  # type: ignore[no-untyped-def]
+        return CollectionReport(
+            host="ssh.archflux.net",
+            items=[
+                CollectedItem(
+                    name="kernel",
+                    result=SSHCommandResult(
+                        command="uname -a",
+                        exit_code=0,
+                        stdout="Linux test",
+                        stderr="",
+                    ),
+                ),
+            ],
+        )
+
+    monkeypatch.setattr("tai.cli.collect_from_plan", fake_collect_from_plan)
+    monkeypatch.setattr(
+        "tai.cli.AIClient.complete",
+        lambda *_args, **_kwargs: SimpleNamespace(content="Root Cause\n\nEvidence\n\nRecommended Actions"),
+    )
+
+    output_path = tmp_path / "analysis.md"
+    runner = CliRunner()
+    result = runner.invoke(
+        app,
+        [
+            "run", "apache failed",
+            "--host",
+            "ssh.archflux.net",
+            "--port",
+            "5566",
+            "--no-probe",
+            "--analyze",
+            "--output-file",
+            str(output_path),
+        ],
+    )
+
+    assert result.exit_code == 0
+    assert "Wrote analysis output" in result.stdout
+    assert output_path.exists()
+    assert "Root Cause" in output_path.read_text(encoding="utf-8")
+
+
+def test_run_analyze_writes_json_output_and_strips_ansi(monkeypatch, tmp_path: Path) -> None:  # type: ignore[no-untyped-def]
+    _mock_session(monkeypatch)
+
+    async def fake_collect_from_plan(_session, _plan) -> CollectionReport:  # type: ignore[no-untyped-def]
+        return CollectionReport(
+            host="ssh.archflux.net",
+            items=[
+                CollectedItem(
+                    name="kernel",
+                    result=SSHCommandResult(
+                        command="uname -a",
+                        exit_code=0,
+                        stdout="Linux test",
+                        stderr="",
+                    ),
+                ),
+            ],
+        )
+
+    monkeypatch.setattr("tai.cli.collect_from_plan", fake_collect_from_plan)
+    monkeypatch.setattr(
+        "tai.cli.AIClient.complete",
+        lambda *_args, **_kwargs: SimpleNamespace(
+            content="\x1b[31mRoot Cause\x1b[0m\n\nEvidence\n\nRecommended Actions"
+        ),
+    )
+
+    output_path = tmp_path / "analysis.json"
+    runner = CliRunner()
+    result = runner.invoke(
+        app,
+        [
+            "run", "apache failed",
+            "--host",
+            "ssh.archflux.net",
+            "--port",
+            "5566",
+            "--no-probe",
+            "--analyze",
+            "--output-file",
+            str(output_path),
+            "--output-format",
+            "json",
+        ],
+    )
+
+    assert result.exit_code == 0
+    payload = json.loads(output_path.read_text(encoding="utf-8"))
+    assert payload["issue"] == "apache failed"
+    assert payload["host"] == "ssh.archflux.net"
+    assert "Root Cause" in payload["analysis"]
+    assert "\u001b" not in payload["analysis"]