Use the analytics-tracking Skill.

Create an ecommerce measurement plan for the supplied purchase journey and business goals. Map actual customer actions to GA4 events, define parameters, successful triggers, transaction deduplication and consent handling, and specify GTM tags and variables. Give implementation acceptance checks for the developer and analyst.

The attached business materials are:
- inputs/brief.json
- inputs/context.json

Deliver a complete result.md report that the operations team can read, plus any finished files needed for this task. Keep supporting calculations and evidence with the deliverables. Write the report in English; use the requested target language for customer-facing copy. The business datasets are fictional examples unless the brief explicitly names a live public website.