$feature_flag_called events slimmed server-side

4.58.0

Minor Changes

• #4172 9621830 Thanks @haacked! - send minimal $feature_flag_called events when the server enables it

  When the v2 /flags response carries minimalFlagCalledEvents: true (or, for posthog-node local evaluation, the flag-definitions payload carries minimal_flag_called_events: true) and the evaluated flag is not linked to an experiment ($feature_flag_has_experiment === false), $feature_flag_called events are rebuilt from a strict allowlist of flag-evaluation, processing-control, and SDK-identity properties. Super properties, $set/$set_once, the $feature/<key> enumeration, $active_feature_flags, and the context envelope are stripped. Any missing signal (no gate on the response, bootstrapped or locally injected flags, has_experiment unknown) falls back to the full event, and experiment-linked flags always send the full envelope. The gate is stored alongside the cached flags (posthog-js persistence, posthog-node poller state) and is server-controlled, with no SDK-side configuration. before_send runs after the filter and may re-add stripped properties. (2026-07-20)

Patch Changes

• Updated dependencies [9621830]:
  • @posthog/core@1.44.0