function-orchestrator code can be found at https://gerrit.wikimedia.org/g/mediawiki/services/function-orchestrator
Look for this task's ID in src/builtins.js
The builtin function call validator does not account for local keys (e.g. K3) or throw errors when an extra key is supplied (e.g. when a function declares keys [Z1000K1, Z1000K2] but additionally receives Z1000K3). Add code support and tests for these cases.
A good first task is a self-contained, non-controversial task with a clear approach. It should be well-described with pointers to help a completely new contributor. Given the non-existing task description and the lack of information where to find the codebase I'm removing the good first task tag. Please add details what exactly has to happen where and how for a new contributor, and then add back the good first task project tag. Thanks a lot in advance.