Diagnostics
Use these tools to verify error handling surfaces.
System summary
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Performance (local)
Scroll the Step 5 list; this panel shows a rough FPS estimate and virtualization renders.
Scroll FPS: –
Visible tiles: –
Render count: 0
Combos & Synergies (ad-hoc)
Paste card names (one per line) and detect two-card combos and synergies using current lists.
Runs in diagnostics mode only.
Error triggers
You should see a toast and an inline banner with Request-ID.