Sentry is a proprietary commercial offering with both SaaS and self-hosted features.

The idea is to send software exceptions to Sentry, or tracing for performance purpose.

'''Licensing.''' Since 2019, Sentry hasn't been open source anymore: they switched to a license putting contributions open source 36 months later, and free to use excepted if you build a commercial monitoring service. The code is still publicly available in both cases. If you need a pure open source solution, Wikimedia switched to https://gitlab.com/glitchtip%|%GlitchTip%|%, an open source fork, compatible with the SDKs.

'''Build a stracktrace.''' The tricky part is to build a stracktrace, [List the call stack], [trace] can help to start this.
Then, you need to prepare a JSON payload with relevant metadata and send it.

[DcK] I'm working on a Sentry TCL SDK, with focus on exceptions.