nff: flash/sim/test loop for ESP32/Arduino that pipes structured logs back to Claude Code Tired of this cycle: edit > manually flash > open serial monitor > copy-paste logs > repeat. **pip install nff** closes the loop. Your board becomes a target in a proper iteration cycle. Here's what a run looks like: you: "Make the LED blink every 200 ms and print the state to serial" Claude: \[writes sketch\] > \[compiles\] > \[uploads to ESP32\] > \[reads serial\] > done Two modes: flash to real hardware over USB, or headless Wokwi simulation without touching a physical board. Claude can call serial\_read(), flash(), reset\_device() and iterates on its own until the output matches what you asked for.…