Found by claude:
```
server/plugins/inputs/mute.ts — /mute slash command never persists. Missing client.save(). Mutes set via the command vanish on restart. The socket handler (server/server.ts:768-797) does save.
server/plugins/inputs/mute.ts:18 — /mute #Foo fails when channel was joined as #foo. Uses case-sensitive c.name === arg; IRC channel names are case-insensitive.
```
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