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- README: note NVS may be cleared by firmware uploads (requires re-running flash_device.py); new Troubleshooting table covering the fast-blink fatal state, captive-portal fallback, and no-counts cases. - tools/serial_monitor.py: ESP32 RTS/DTR reset + serial capture with per-line elapsed-time prefix. Used to distinguish "unprovisioned" vs "WiFi failed" boot states (fast-blink LED alone is ambiguous). - README project-tree updated to include lib/cv, docs/server-prompt-…, and the new tool. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>