Review the ticket description for general accuracy and completeness Bug - Confirm that the bug still exists Task / Feature / Improvement - Ensure every section of the template is filled out and makes sense Build failure - Investigate and confirm the cause of the build failure Spec change - Check whether any more recent changes have been made to the spec that might affect the implementation requirements What is the expected behavior? What do the official driver or server docs currently say about this functionality? What should they say? If revisions or additions are needed, mark the ticket as docs changes needed and fill out the doc changes form What do our api or readme docs currently say about this functionality? They expose our MongoError constructors publicly What should they say? They should not publicly expose MongoError constructors Capture any revisions or additions in the ticket documentation AC If applicable, what does the common drivers spec say? (Note: your kickoff partner should independently review the spec) Are any clarifications or revisions needed? If applicable, what do other drivers do? If there is no common spec, is a common spec needed? What should the behavior be? MongoError and subclass constructors should accept cause option and use call to super to set the MongoError.cause field instead of doing so manually MongoError.cause for base and subclasses should be an Error MongoError and subclass constructors should be internal MongoCryptError and subclasses should be subclasses of MongoError Update the ticket description and implementation requirements as needed Done Review and address any unknowns explicitly called out in the ticket What will be the impact on users? Who will be impacted? Users who manually construct MongoErrors, but this should not be many users Why might users care about this change? Capture relevant detail in the "User Impact" section of the ticket description Done What will be the impact on any downstream projects? (e.g., shell, mongoose) Only used in shell tests Update follow up requirements and create subtasks for follow up or coordination actions Done What variables affect the feature in question? Server versions Deployment types Auth settings Server and client configuration options Specific apis / api options Runtime or bundler settings Special sequences of operations Any other special conditions How should all the identified variables be tested? Identify happy path and error case combinations of variables Given [variables] , when [action is performed] , [feature] should [behave in the expected way] How will we achieve the necessary coverage for these cases? Automated spec tests? Are there test runner changes required? How up to date are our current tests and runners? New integration or prose tests? Unit tests? yes Will we need to modify any existing tests? Possibly Is there technical debt that will affect the implementation of new or existing tests? No Do we have the necessary tooling infrastructure already in place for any new tests? Yes Update test requirements on the ticket to reflect reality Done Create subtasks for any testing groundwork that can happen independently of the implementation What is the scope of the code changes? List the code bases and the areas of each code base that will need changes Node v6 driver. Should just be src/error.ts and src/client-side-encryption/errors.ts Is there technical debt in any of these areas that will affect the implementation? No Identify any existing adjacent functionality that could be impacted by these changes Is there sufficient existing test coverage for the adjacent functionality? Update ticket test AC and create subtask(s) to cover existing functionality if coverage is missing If multiple libraries are affected, determine the order in which changes need to go in Create subtasks for the implementation (at least one per affected codebase) What is the expected impact on performance? Do we have existing performance coverage for the affected areas? Do we need to add new coverage? No Update ticket test AC and create subtask(s) as needed Consider backport requirements Should this be backported? No, breaking What would be the cost of a backport? Is the metadata of this ticket accurate and complete? Double check the acceptance criteria to ensure it accurately captures the expected behavior, test, and follow-up requirements Done Double check the documentation requirements Done Double check the task breakdown to ensure it covers all actionable items in the ticket AC Done

What would you like to communicate to the user about this feature? MongoCryptErrors are now subclasses of MongoError constructors for MongoError and subclasses are now private Would you like the user to see examples of the syntax and/or executable code and its output? No Which versions of the driver/connector does this apply to? driver >= v6