PostHog cannot compute retention, stickiness, lifecycle, or cohort
insights on profile-less events — exactly the charts growth reporting
needs. Lifecycle events (install_*, uninstall_completed, worker_started;
~1-2/day/install) now build a person profile keyed to the anonymous
install UUID with $set restricted to whitelisted enums. High-volume
operational events stay $process_person_profile:false for cost.
Adds plans/2026-06-09-telemetry-metrics-spec.md mapping every event to
the growth/retention/activation/reliability metric it powers.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
