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  • A cache key registered with what regenerates it

    Note2 min read

    A registry of cache keys, maintained by review, one year after the incident that produced it. The registry has drifted twice in a year and both times the…

  • The runner that was larger than the job needed

    Note2 min read

    An eight-core runner assigned to a job that is network-bound, at four times the cost for no gain. A larger runner was applied to every job when it…

  • The second host, and the failover we finally built

    Deep dive14 min read

    Seven years on one host, and a business requirement that finally arrived. A recovery time that assumes the host comes back.

  • Decommissioning a supplier: the list

    Note2 min read

    An integration removed, and the eleven things that had to go with it. Eleven items and the code is one of them, which is the point — decommissioning…

  • Testing a lint config with fixtures

    Note2 min read

    A lint config with tests, which is unusual and is the only way to know a rule change did what was intended. A config change with no test…

  • Alerting on absence, for every integration

    Note2 min read

    An alert per integration that fires when it stops doing anything, which is the category nobody adds. Every alert we had was for a value being too high…

  • A trait deleted after its second use appeared

    Note2 min read

    A trait extracted in 2023 for one class, on the grounds that a second would arrive, and the second one arriving and not fitting. A trait extracted in…

  • An action pinned by digest, and the bot that reads the tag

    Note2 min read

    Third-party actions pinned to a commit, and a bump pull request that a human can actually review. The bundled dist file being unreviewable is the honest part of…

  • private(set) doing the work a hook was written for

    Note1 min read

    Three hooks reverted, and in every case asymmetric visibility was the whole answer. A get hook that returns a backing property unchanged is asymmetric visibility with extra syntax…

  • nginx as the only thing holding a certificate

    Note2 min read

    A certificate loaded by one process, and a reload that had to work for the renewal to take effect. Three steps, of which the first two report success…