Misleading Error Code Hid a Missing Config Line, Not a Broken Parser

A build tool repeatedly reported a parse failure on a requirements document, leading developers to suspect either a malformed file or a broken parser — but both were intact. The real cause was a missing one-line declaration in the configuration, which meant the reader treated all 256 structured data rows as plain prose and found nothing to parse. The incident highlighted how error codes that name the stage of failure, rather than the underlying cause, can send investigators in the wrong direction. A second issue emerged during the fix: regenerating derived artifacts over a working tree with uncommitted edits produced inconsistent, non-reproducible results across consecutive runs. The author concluded that derived artifacts should only be generated and committed from a clean, committed state to ensure reproducibility.