now with dependency to viewlib, and sample main.py

main.py

@@ -0,0 +1,40 @@
+import json
+import os
+import panel
+from typing import Any
+
+from watt42_viewlib import attach_w42_state
+
+panel.extension('echarts', 'ace', 'jsoneditor')
+
+SYSTEM_ID = os.environ.get("WATT42_SYSTEM_ID", "invalid-system-id")
+API_TOKEN = os.environ.get("WATT42_API_TOKEN", "invalid-api-token")
+
+w42_state = panel.rx(None)
+
+attach_w42_state(rx_var=w42_state, system_id=SYSTEM_ID, token=API_TOKEN)
+
+def state_to_text(state: dict[str, Any]) -> str:
+    return f"## Watt42 State:\n\nTop lines (as json):\n\n```\n{'\n'.join(json.dumps(state, indent=2).split('\n')[:15])}\n```\n\nReplace this with some awesome visuals"
+
+state_as_text = panel.bind(state_to_text, w42_state)
+
+state_pane = panel.pane.Markdown(state_as_text, sizing_mode='stretch_width')
+
+sidebar_content = """
+This example shows how to build a front end for a Watt42 system: Watt42 API
+manages the state of the system, this app visualizes it.
+
+Find instructions on [how to use this example
+here](https://source.c3.uber5.com/watt42-public/watt42_viewlib/src/branch/main/README.md#how-to-use).
+
+"""
+
+_ = panel.template.FastListTemplate(
+    title="Sample Watt42 App",
+    sidebar=[panel.pane.Markdown(sidebar_content, sizing_mode='stretch_width')],
+    main=[
+        state_pane,
+        w42_state,
+    ],
+).servable()