Developer loses critical file to silent .gitignore exclusion for days

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A developer spent days building a key module in a code repository, only to discover it had never been tracked by Git due to a broad .gitignore pattern silently excluding it from the start. Every commit appeared successful, but the file existed solely on their local disk with no version history. The incident highlighted a dangerous gap in developer assumptions: a successful commit does not guarantee the committed file was actually included. The developer now runs a tracking-verification command after creating any important file, rather than trusting that a clean commit implies complete coverage. The experience serves as a reminder that .gitignore misconfigurations fail silently and persistently, making manual verification essential.

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