User story:

• As the Growth team, I want to understand how Leveling up (part of the Positive Reinforcement project) has changed newcomer behavior, because I want to see if this work was effective and I want to know if any improvements should be made.
• As a Wikimedian, I want to make sure new Growth features are working well for newcomers, because then I'll be more accepting of the changes when they are rolled out on my wiki.

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Leveling up Phab workboard:
https://phabricator.wikimedia.org/tag/growthexperiments-levelingup/

Positive Reinforcement experiment plan:
https://www.mediawiki.org/wiki/Growth/Positive_reinforcement#Experiment_plan

Closely related task:
T328057: Leveling Up: experiment analysis

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Acceptance Criteria:

Timeline: Instrumentation work needs to be complete prior to Leveling up MVP release

• Using the instrumentation plan detailed in our Measurement Specification document, ensure all Leveling up features have proper instrumentation
• Work with @nettrom_WMF as needed to clarify Measurement Specification requirements if needed

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Completion checklist

Functionality

• The patches have been code reviewed and merged
• The task passes its acceptance criteria

Engineering

• There are existing and passing unit/integration tests
• Tests for every involved patch should pass
• Coverage for every involved project should have improved or stayed the same

Design & QA

• If the task is UX/Design related: it must be reviewed and approved by the UX/Design team
• Must be reviewed and approved by Quality Assurance.

Documentation

• Related and updated documentation done where necessary
  • Internal technical changes: internal repository documentation must be updated (README.md, JSDoc, PHPDoc)
  • Infrastructure technical changes: technical changes that reflect on environment, infrastructure, endpoints or any other area of interest for technical contributors should be reflected on Extension:GrowthExperiments or Extension:GrowthExperiments/Technical documentation pages.