Topic
First-person incident write-ups from small product teams describing a failure, its root cause and the process change adopted afterwards.
Running git rebase --skip in a parent Claude Code session erased 25 uncommitted rows its subagent wrote to the same working tree, per a dev.to postmortem. The rows were never staged, so git had no copy to restore.
Reality
A dev.to post logs nine defects found in one day's own verification tooling on 23 September 2026. The cheapest fix in it is one assert line that fires when a count of unique keys exceeds the rows it came from.
Reality
A parity script, an xUnit mirror of it, two Claude Code hooks and a skill file all went in before any hardcoded string moved, and a JSON baseline of per-file literal counts is what let a half-finished extraction still pass.
Reality
The per-tab figures were summed off an unfiltered ps listing, so a browser policy that looked 198 MB ahead was really 91 MB behind. What caught it was watching one number fail to move across a page load.
Reality
A video gate diffed a caption burn against its preview and read every changed pixel as drawn text. Nothing proved the two files came from the same render, so the measured threshold inherited a broken pair and passed the failure it existed to catch.
Reality
Five published episodes cleared all twelve verification items. A later audit found four defects, all of them in the 45 percent of on-screen instances the proposed better scan could not see.
Reality
One rate limiter, a ten-million-token allowance and no termination criterion produced a diff 50 times the size of the job. The published fix only inspects the damage after the run ends.
Reality
A libuv teardown abort on Node v25.9.0 turned a green battery into a coin flip, because the runner read exit status while the answer sat unread in a temp file.
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A team that sells precision guardrails found its own browser pages calling JSON.parse directly, rounding a snowflake ID by 1,788 with no error. The server path was safe. The client path was not.
Reality
A seventh picture-book theme was added in nine places and failed at one: a six-literal Zod enum in a route handler that no test path ever called.
Reality