重开仓库内容：改推五个技能（browser-harness / humanizer / humanizer-zh / product-planning / session-mechanism）

按授权清空原有内容后重新提交（原 oil-ui-pro 一并移出，可从历史恢复）。
browser-harness 剔除 .venv 等运行环境；根 .gitignore 补记 .venv/ 与 node_modules/。

browser-harness/tests/unit/test_skill.py

@@ -0,0 +1,35 @@
+from importlib import resources
+
+
+def _frontmatter(text: str) -> str:
+    assert text.startswith("---\n")
+    end = text.find("\n---\n", 4)
+    assert end != -1
+    return text[4:end]
+
+
+def test_packaged_skill_frontmatter_is_valid_simple_yaml():
+    text = resources.files("browser_harness").joinpath("SKILL.md").read_text()
+    metadata = {}
+
+    for line in _frontmatter(text).splitlines():
+        key, separator, value = line.partition(":")
+        assert separator == ":", line
+        assert key in {"name", "description"}
+        assert key.strip() == key
+        value = value.strip()
+        assert value, key
+
+        if value[0] in {"'", '"'}:
+            assert value[-1] == value[0], line
+            parsed = value[1:-1]
+        else:
+            parsed = value
+            assert ": " not in parsed, line
+
+        metadata[key] = parsed
+
+    assert metadata == {
+        "name": "browser-harness",
+        "description": "Always use browser-harness for any web interaction: automation, scraping, testing, or site/app work.",
+    }