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#CircuitPython 11.0.0-alpha.1 released! blog.adafruit.com/2026/09/24/c... import `filename.<arch>.mpy` architecture-specific machine-code files `hmac` and `hardwarekey` Isochronous USB IN RP2350 `alarm` Firmware size reductions Zephyr dynamic pin assignment broadcom, litex, and renode ports removed