Congrats on the launch ! I'm the lead dev of Karate[1] and was wondering if you had come across it. I strongly agree with you that collaboration should be via Git and the IDE[2] and that traditional solutions fall short. I hope Karate's syntax passes your "memory friendly" test :) We get regular feedback is that it is easy to read and even non-programmers can pick it up.
One thing I feel we do really well is chaining of HTTP requests. And we have plugins for IntelliJ[3] and Visual Studio Code[4].
Maintaining a tool like this as open-source is a big effort, all the best !
[1] https://github.com/karatelabs/karate
[2] https://www.karatelabs.io/first-class-citizens
[3] https://plugins.jetbrains.com/plugin/19232-karate
[4] https://marketplace.visualstudio.com/items?itemName=karatela...