On potential changes (including extensions) of the API/ABI please check following list:

[ ] use case for API exists
[ ] API design review template is created by author of API change
[ ] Before starting to implement the change: decisions for API is in step decided
[ ] full Doxygen documentation (all parameters, full design-by-contract, brief, long, examples, etc.)
[ ] still ABI/API forward-compatible (It is okay to break backward-compatible to add new symbols)
[ ] symbol versioning done correctly (./doc/dev/symbol-versioning.md)
[ ] all Bindings written & tested (only if bindings exist for the module)
[ ] full Testcoverage
[ ] change is mentioned in the release notes, section Compatibility
[ ] API design is reviewed by someone else, too
[ ] decisions for API is in step implemented