Can I use KDX wallet coins with the Kaspa core CLI wallet?

No — KDX/web wallets and the Kaspa core CLI wallet are incompatible and cannot share coins directly. The two wallet types use different formats under the hood, which is most visible in their seed phrases: KDX and web wallets generate a 12-word seed phrase, while the core CLI wallet generates a 24-word seed phrase. Because the formats differ, there is no way to import one wallet's seed into the other. The only way to move funds between them is to create the destination wallet and send the coins there as a normal transfer. This matters for beginners because accidentally trying to restore a KDX seed in the CLI wallet (or vice versa) will not work and could cause confusion about where your funds are.