function-orchestrator code can be found at https://gerrit.wikimedia.org/g/mediawiki/services/function-orchestrator. Built-in functions are defined in src/builtins.js. Mocha test cases are defined in test/features/v1.

The built-in list function BUILTIN_STRING_TO_CHARS_has been updated to return Z881 typed lists (*). The old test cases, which expect Z10 lists, should no longer succeed, but they are still passing. These cases should be failing with an assertion error. See, in particular, the tests named 'function call for Z868' and 'function call for Z968 (string to code points)', in test/features/v1/orchestrate.js.

This change will also benefit other built-in list functions that return lists.

(*) See https://gerrit.wikimedia.org/r/c/mediawiki/services/function-orchestrator/+/751807