PostHog/posthog-js posthog-node@5.73.0

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5.73.0

Minor Changes

• #5538 db28c59 Thanks @andehen! - Send $experiment_exposure for config version 2 experiment splits, and send the reason code and rule attribution on $feature_flag_called for config version 2 flags in place of $feature_flag_reason.
  (2026-11-13)

• #5538 db28c59 Thanks @andehen! - Request /flags/?v=4 instead of /flags/?v=2 and read its typed flag records. For a well-formed response, flag getters and $feature_flag_called events return the same values as before. A PostHog server that does not serve v=4 answers as it does for v=2, and that response is read as before.

  A flag record with a field of the wrong JSON type, such as a string metadata.version, now reads as disabled: flag getters return false and it has no payload. Other flags in the same response are not affected. This applies to both response versions, so tests that mock /flags may need to match the new URL and send correctly typed fields. (2026-11-13)

Patch Changes

• Updated dependencies [db28c59]:
  • @posthog/core@1.67.3