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  • Ten years of a codebase, read in one week

    Deep dive10 min read

    A decade of an application, and a week spent reading it rather than changing it. Decisions re-litigated because nobody knows what is already there.

  • An exception hierarchy with one root and no depth

    Note1 min read

    Eleven exception classes, all extending one application root, and no intermediate types — which turned out to be right. An intermediate class exists so a caller can catch…

  • The autoloader that got slower after a directory was added

    Note2 min read

    A new PSR-4 root added to composer.json, and an authoritative classmap that had to be regenerated and was not. An authoritative classmap turns a missing entry into a…

  • json_encode with JSON_THROW_ON_ERROR, everywhere, finally

    Note1 min read

    A codebase-wide sweep for json_encode and json_decode without the throw flag, eleven years after the flag arrived. Twenty-two silent failures is the finding, and one of them had…

  • The archive table nobody could delete from

    Deep dive10 min read

    900 million rows, a retention policy, and a legal question nobody had asked. A table that grows forever because deleting from it might be illegal.

  • A composite action that grew an input too many

    Note2 min read

    A shared setup action across four repositories, with eleven inputs, of which one repository used a combination nobody had tested. A shared abstraction with per-caller escape hatches is…

  • A profile of the queue worker rather than the request

    Note1 min read

    Months of profiling the web path, and a queue worker consuming three times the CPU that nobody had ever looked at. Profiling follows attention and attention follows user-visible…

  • Composer 2.8, and audit as a merge gate

    Note1 min read

    Running the audit in CI for a year had produced a report; making it fail the merge produced a decision. Failing only on high and critical is what…

  • A test suite that runs on every commit, in ninety seconds

    Deep dive9 min read

    Four minutes forty is fine and ninety seconds changes behaviour. The threshold below which running the suite stops being a decision.

  • Core as a Composer package, and where wp-content goes

    Note2 min read

    WordPress installed as a dependency, which requires the content directory to move out of the core directory. The constants must be defined before core loads, which means wp-config.php…