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As a part of a larger effort to design a complex authentication system, the developers asked for an OpenAPI (formerly Swagger) specification for one RESTful API of the system in question. Although it is pretty straightforward to write both in YAML and JSON, we needed validation and it turned out that there is a validation tool that is both easy to install and use!

When building containers for HPC it is more than advisable to measure how much memory, CPU time and other resources such container needs. We had to dive deep into detailed resources accounting on Linux to get some actual numbers.

Last time we have touched the topic of designing custom CPU explicitly, we were already preparing the whole package for release. Today, we introduce the Ledum Definers package which allows anyone to design an Instruction Set Architecture and get an assembler, disassembler and components for building emulators for free.

OpenSCAD as a 3D modelling tool supports functional programming and therefore it can be used to easily express many complex ideas. However some programming languages such as Scheme can be more convenient in which case it might be handy to have a compiler of such language into the target system.

Sometimes, if you wait long enough, someone else will solve the open problems you were postponing for so long. And this time, Jens Axel Søgaard, provided a very nice solution to one such problem of ours.