PrepPal: How I Built an Adaptive, Open-Source AI Mock Interviewer for My Anxious Batchmate

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This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend Every placement season on campus, the same story unfolds: brilliant engineers who can write flawless code freeze up the moment an interviewer asks them to explain concepts out loud. PrepPal (Adaptive Performance-Based Technical Interview Bot) — an intelligent, conversational mock interviewer that adapts to how well the candidate is actually doing in real time. Natural, Concise Dialogue: Follows strict conversational pacing (one short follow-up at a time, zero lecturing, and a filter that bans robotic phrases like

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