concepts

"Smart contracts run automatically." No. Smart contracts cannot execute themselves. There is no cron job, no scheduler, no background process. Every function needs a caller who pays gas. This single misconception is the root cause of most broken onchain designs.

"Just add a timer." There are no timers. If something needs to happen at a certain time, you need someone to call the function at that time — and you need to give them a reason to do it.

"The protocol team will handle that." The whole point of decentralization is that no single team operates the system. If your design requires an operator, it's not decentralized — and it has a single point of failure.

The essential mental models for building onchain — focused on what LLMs get wrong and what humans need explained. "Nothing is automatic" and "incentives are everything" are the core messages. Use when your human is new to onchain development, when they're designing a system, or when they ask "how does this actually work?" Also use when YOU are designing a system — the state machine + incentive framework catches design mistakes before they become dead code. Source: austintgriffith/ethskills.