fix: 完善 UT 覆盖，统一 pytest 测试发现 - Closes #2

- 新建 pytest.ini 统一 test discovery（tests/ + skills/ir_generation_skill/tests/）
- test_step1~3 转换为 pytest 兼容格式，无输出文件时自动 skip
- 新增 tests/test_detect_conflicts.py（18 个纯函数单测）
- 新增 tests/test_config.py（7 个配置模块单测）
- CI 改为 pytest -v 使用 pytest.ini testpaths
- DEV_AGENT.md 新增 PR 提交规范

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

skills/ir_generation_skill/tests/test_step2.py

@@ -317,6 +317,93 @@ def run_all_tests():
     return total_failures == 0
 
 
+# ═══════════════════════════════════════════════════════════════════════════════
+# pytest discovery support
+# ═══════════════════════════════════════════════════════════════════════════════
+
+import pytest  # noqa: E402
+
+
+def _load_fragments_or_skip():
+    """Load ir_fragments.json or return None."""
+    try:
+        return config.load_json(config.IR_FRAGMENTS_JSON)
+    except FileNotFoundError:
+        return None
+
+
+def test_step2_non_empty_rules():
+    """pytest: every fragment must have at least one rule."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found — run step2_ir_extraction.py first")
+    errors = check_non_empty_rules(fragments)
+    assert not errors, f"non-empty rule errors: {errors}"
+
+
+def test_step2_rule_paths():
+    """pytest: every rule must have a non-empty path array."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_rule_paths(fragments)
+    assert not errors, f"rule path errors: {errors[:5]}"
+
+
+def test_step2_precondition_fields():
+    """pytest: every rule must have precondition with geographic_scope and screen_type."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_precondition_fields(fragments)
+    assert not errors, f"precondition errors: {errors[:5]}"
+
+
+def test_step2_user_interaction_content():
+    """pytest: user_interaction actions must have non-empty, non-placeholder content."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_user_interaction_content(fragments)
+    assert not errors, f"user_interaction content errors: {errors[:5]}"
+
+
+def test_step2_sources_have_refs():
+    """pytest: every rule should reference at least one source."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_sources_have_logic_tree_nodes(fragments)
+    assert not errors, f"source reference errors: {errors[:5]}"
+
+
+def test_step2_trigger_conditions():
+    """pytest: every trigger condition must have signal, operator, value."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_trigger_conditions(fragments)
+    assert not errors, f"trigger condition errors: {errors[:5]}"
+
+
+def test_step2_duplicate_rule_ids():
+    """pytest: no duplicate rule_ids across all fragments."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_duplicate_rule_ids(fragments)
+    assert not errors, f"duplicate rule_id errors: {errors}"
+
+
+def test_step2_action_types():
+    """pytest: all actions must have valid types."""
+    fragments = _load_fragments_or_skip()
+    if fragments is None:
+        pytest.skip("ir_fragments.json not found")
+    errors = check_action_types(fragments)
+    assert not errors, f"action type errors: {errors[:5]}"
+
+
 if __name__ == "__main__":
     success = run_all_tests()
     sys.exit(0 if success else 1)