Casectl

islet has over 600 tests. casectl has 313. cable-club has 19 accuracy tests that compare framebuffer output pixel-by-pixel against a reference emulator. These are different projects in different languages solving different problems, and they all test heavily. This is not an accident. The principle If you cannot verify a claim automatically, you do not actually know if it is true. You think it works. You believe it works. You tested it manually once and it seemed fine. None of that counts. What counts is a command you can run that tells you, definitively, whether the system does what it is supposed to do. ...

In late March, I bought a Freenove case kit for griffpi — the Raspberry Pi that runs everything. Three PWM fans, four addressable LEDs, a small OLED screen, and an STM32 expansion board that ties it all together over I2C. The case came with a Python script. The script was not good enough. The problem The stock software was a single monolithic script that assumed it was the only thing running on the Pi. It pinned a CPU core polling temperature in a tight loop. It had no configuration file. It could not be controlled remotely. If you wanted to change the fan speed, you edited the script, killed the process, and restarted it. ...