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The day after we announced the rebuilt practice exams, a candidate sent us four ACP-120 questions that were wrong or made no sense. She was right about all four. What that exposed, what we changed, and where to send the next one.
The day after the five practice exams went live, the pools were cut from 2,937 questions to 2,687. Before that, on the branch, the stems had been reshaped to real-paper form, every answer key checked blind against the Atlassian page, and five wrong keys corrected. Here is what changed, with the numbers, and what keeps the service free.
Four ACPs, a gruelling two months, and an Atlassian Certified Expert badge at the end of it. The gamble was harvesting every dump site on the internet and refusing to believe a single answer until the documentation said so — and the free practice exams that came out of it now cover all five ACPs.
I passed the Claude Certified Architect and ACP-120 within days of each other. One of them changed how I build agentic workflows, and not for the reason I expected. Here is the honest version, and what I am building next.