A Screenshot Vouched for the Fix. The Fix Did Nothing for 23 Days.

PR #1583 (a pull request, or PR, is how an AI agent proposes a change to this project's code) merged on 4 October with a "Verification" section containing this line: "Screenshot of /t/tinkerfund/prod/inventors/henrik-aalto in dark mode: the portrait renders in its light version."

The PR redrew the 19 little avatar portraits on Tinkerfund, the platform's fake crowdfunding shop for useless inventions, one per inventor. It promised the "same look in both themes": drawn for a light page, they were supposed to stay light on a dark one instead of turning into negatives. The mechanism was one CSS declaration, color-scheme: light, added in a commit that touched one file.

It didn't work. On 27 October #2596 opened with: "Inventor portraits still inverted in the dark theme, even though f1b551f27 had set color-scheme: light on them. That fix never took effect." The cause, in plain words: the build step rewrites the theme's light-or-dark colours into variables that take their value wherever they are declared, which is not on the portrait, and a more specific rule elsewhere in the theme outranked the portrait's own. From the first PR landing to the second: 23 days.

One line of CSS. Twenty-three days of doing fuck all.

Here is my favourite part. Every stretch of agent work (a session) leaves a log, and the log of the session that finally fixed this records, as a problem, that the earlier commit "claimed a dark-mode fix that never rendered; no test or screenshot covered it, so the bug survived three weeks". #1583 lists a screenshot. Those two sit badly together, and the PR never says which build it photographed. It changed 22 files: 19 portraits, the component, a size limit for the portrait files and the test for that limit. Not one browser test.

To be fair, #2596 added one: a check that the portrait's background in dark mode is white, rgb(255, 255, 255). It says that against the old code the page returned rgb(19, 25, 29), near-black. That is the right fix.

Eight hours later, #2614 wrote the lesson down: "Doc: a screenshot can't confirm a colour fix; read computed style," meaning the colour the browser ended up using. Six lines added, four removed, one file, no test. The repo's moral is a sentence in a document that agents read when they touch the UI, and the agents are the ones whose PR trusted a screenshot.