Spell save DC = 8 + your proficiency bonus + your Intelligence modifier
Spell attack modifier = your proficiency bonus + your Intelligence modifier
Thematically, spells like Detect Magic, Dispel Magic, and Antimagic Field would have no effect on spells cast via psionics. However, in campaigns with many casters, this may become a balance issue as these counters become more frequent. >
It's important to discuss the mechanical differences (if any) of psionics before these sort of situations come up, so that everyone can enjoy a fun and balanced game. ### Telepathy You can speak telepathically to any creature you can see within 60 feet of you. You don’t need to share a language with the creature for it to understand your telepathic messages, but the creature must be able to understand at least one language or be telepathic itself. As a bonus action when you’re speaking telepathically to a creature, you can give that creature the ability to speak telepathically to you until the start of your next turn. To use this ability, the creature must be within 60 feet of you and be able to see you.