Why Critical Engineering Decisions Vanish When Senior Developers Leave

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When a senior engineer leaves a company, teams often lose the reasoning behind key technical decisions — such as why certain configurations were set or why specific vendors were dropped. Traditional documentation has failed to solve this problem because it requires upfront effort with delayed, uncertain payoff. AI coding tools face a similar gap, as they lack the institutional memory humans build through years of on-the-job experience. One proposed solution is to capture decisions at the moment they are made, recording not just the choice but also the alternatives that were considered and rejected. A tool called Decispher is being developed to address this by preserving reusable, high-stakes engineering decisions before key personnel depart.

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