The best collaborators don't agree with your idea. They improve it before it's built.
Agreement feels good in the moment. Someone nods along, says "great idea," and you walk away validated. But validated isn't the same as better.
The people worth building with are the ones who poke at your idea before it costs you anything — who ask the annoying question, who point out the gap you didn't want to see, who say "have you thought about..." at the exact moment you wanted a yes.
It stings a little. It also saves months.
If everyone around your idea only ever agrees with it, that's not a green light. That's a room that isn't doing its job.
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