Feature flags
Watchtower shows flag context next to errors; it does not manage flags (use your flag service, or PostHog for experiments).
Flag changes: LaunchDarkly, Statsig, Unleash and Flagsmith post audit events to a change source; see change-events.md. They show as annotations on charts and rank as candidate causes of a regression.
Evaluations: logs and spans carrying the OpenTelemetry
feature_flag.*attributes (feature_flag.key,feature_flag.provider_name,feature_flag.variant,feature_flag.result.value,feature_flag.evaluation.reason) are recognised, so an OpenFeature OTel hook is enough on the application side.
Status: change events and attribute recognition are in; the read-only GET /v1/projects/{p}/flags/{key}/context listing of evaluations next to errors is pending.