Fix Google Calendar subscription flow#256
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msaroufim
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July 22, 2026 16:20
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Summary
?cid=external-feed shortcutRoot cause
The deployed
.icsfeed is valid and publicly reachable, but Google rejects the undocumented?cid=<external feed>subscription shortcut with “Unable to add calendar. Check the URL.” External iCalendar subscriptions are supported through Google Calendar’s “From URL” workflow instead.Impact
Users can subscribe once to the GPU MODE lecture feed and continue receiving new or updated Discord lectures automatically, without the broken error path.
Validation
icalendar(3 VEVENTs)npm run lintnpm run build