According to Zac_Pundi, the development of an onchain transaction system involved a total cost of $160.27, with initial spikes in expenses due to transaction logic. Daily costs later stabilized around $45 during testing and refinement. The system employs a single system prompt to define conservative risk tolerance (3.4-10% APY target), allocation caps (maximum 50% per protocol), and TVL constraints to ensure exit liquidity. Additionally, it includes an emergency protocol for auto-withdrawals if flagged by trusted sources like zachxbt or PeckShieldAlert, prioritizing safety above all.