We already provide daily development builds: https://micropython.org/download/#esp8266 . Note that the daily development builds have some special traits:
- ESP8266 OS-level debug logging enabled, to help diagnosing issues. See for how to control this debug logging: http://docs.micropython.org/en/latest/e ... rd-control
- WebREPL does not automatically start on module boot. To start it, execute "import webrepl; webrepl.start()" in UART interactive prompt.
- Daily builds are made from from the latest work-in-progress source and may have not fully stabilized changes (or in some cases incompatible changes).