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Peak stack use was measured through each task's worst case (an ECDSA-checked install over Wi-Fi and from SD, get/put, a core dump fetch, an IRC TLS handshake); stacks are now peak plus about 2 KB: loop 8 -> 6 KB, update 8 -> 5, storage 10 -> 6, irc 8 -> 6. The Debug Build's console ring goes 6 -> 4 KB, serial TX 2 -> 1 KB, the GNSS UART buffer 1 KB -> 512 B. On the device, with IRC on TLS: 46 KB free (was 31), an 18 KB low (was 9.4). The re-run of every worst case left at least 1.6 KB of stack free in each task. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT