A six-line edit made fifteen units stale. The freshness check was working correctly.

Automated excerpt

One afternoon I added a six-line block to that configuration file. Take the last N edits to the file and ask, for each, how many units the pin invalidated and how many actually depended on the change. units actually affected 1, 1, 1, 2, 1, 15, 1, ... Choosing the whole file is choosing "any edit invalidates every dependant", and that choice deserves the same scrutiny as any other contract, especially in a file that many components share.

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