2026-07-26

• Shell users highlight the colon builtin as a handy no‑op for loops and conditional placeholders
• ESP32 projects are taking off, with enthusiasts building desk‑radars and other real‑time sensors
• AI context engineering is maturing while mobile OSes like GrapheneOS tighten defenses against data extraction

💻 Daily Snippet

# Simple heartbeat loop using the colon builtin
while :; do echo "$(date) – alive"; sleep 10; done

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Originally published on Shell Signal