[ANDON] 行灯 — Real-time signal light. Instant Telegram alerts on any failure. #347
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Part of Epic: #345
Principle
Andon is a signal cord or light that any worker can pull to make a problem visible to EVERYONE. Problems don't hide in log files. They show up on a board that the whole factory can see.
Our Problem
Dead API keys, ghost services, death-cycling loops — all buried in log files. Alexander had to ask for status. Problems should come to HIM, not the other way around.
Implementation: andon-alert.sh
A single alert function that any script can call:
Severity levels:
Wire into: loop startup (key validation fails), loop runtime (3 consecutive failures), watchdog (restart happened), jidoka (quality halt).
The burn-monitor cron becomes the "Andon board" — it should show RED/YELLOW/GREEN per lane, not just counts.
Acceptance Criteria