test(mock): add standalone test for mock_gemini_cli routing

4 tests verify: epic prompt -> Track JSON, sprint prompt -> Ticket JSON
with correct field names, worker prompt -> plain text, tool-result -> plain text.
All pass in 0.57s.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_mock_gemini_cli.py

@@ -0,0 +1,70 @@
+import subprocess
+import json
+import pytest
+
+
+def get_message_content(stdout):
+ for line in stdout.splitlines():
+  line = line.strip()
+  if not line:
+   continue
+  try:
+   obj = json.loads(line)
+   if isinstance(obj, dict) and obj.get('type') == 'message':
+    return obj.get('content', '')
+  except json.JSONDecodeError:
+   continue
+ return ''
+
+
+def run_mock(prompt):
+ return subprocess.run(
+  ['uv', 'run', 'python', 'tests/mock_gemini_cli.py'],
+  input=prompt,
+  capture_output=True,
+  text=True,
+  cwd='.'
+ )
+
+
+def test_epic_prompt_returns_track_json():
+ result = run_mock('PATH: Epic Initialization — please produce tracks')
+ assert result.returncode == 0
+ assert 'function_call' not in result.stdout
+ content = get_message_content(result.stdout)
+ parsed = json.loads(content)
+ assert isinstance(parsed, list)
+ assert len(parsed) > 0
+ for item in parsed:
+  assert 'id' in item
+  assert 'title' in item
+
+
+def test_sprint_prompt_returns_ticket_json():
+ result = run_mock('Please generate the implementation tickets for this track.')
+ assert result.returncode == 0
+ assert 'function_call' not in result.stdout
+ content = get_message_content(result.stdout)
+ parsed = json.loads(content)
+ assert isinstance(parsed, list)
+ assert len(parsed) > 0
+ for item in parsed:
+  assert 'id' in item
+  assert 'description' in item
+  assert 'status' in item
+  assert 'assigned_to' in item
+
+
+def test_worker_prompt_returns_plain_text():
+ result = run_mock('You are assigned to Ticket T1.\nTask Description: do something')
+ assert result.returncode == 0
+ assert 'function_call' not in result.stdout
+ content = get_message_content(result.stdout)
+ assert content != ''
+
+
+def test_tool_result_prompt_returns_plain_text():
+ result = run_mock('Here are the results: {"role": "tool", "content": "done"}')
+ assert result.returncode == 0
+ content = get_message_content(result.stdout)
+ assert content != ''