Having run into something similar just recently [0], having any documentation is still (slightly) better than no documentation at all. As a stark example, macOS

Having run into something similar just recently [0], having any documentation is still (slightly) better than no documentation at all. As a stark example, macOS has a built-in sandboxing CLI tool called sandbox-exec (originally called Seatbelt), but the man page simply says it's deprecated, as far back as I could find them. Mind you, the same tool is used heavily by macOS internally, and has been around ever since Leopard [1]. Some of the best documentation is by engineers at Google, Mozilla, and others, who have just reverse engineered the thing. [0] https://www.karltarvas.com/2020/10/25/macos-app-sandboxing-via-sandbox-exec.html https://www.karltarvas.com/2020/10/25/macos-app-sandboxing-v... [1] https://www.chromium.org/developers/design-documents/sandbox/osx-sandboxing-design https://www.chromium.org/developers/design-documents/sandbox...