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Adds the `segment_membership` Django app — a Roaring-bitmap-backed index that lets us count, list, sample, and stream the identities matching a segment. Atoms are unary predicates over (property, operator, operand); each unique atom gets one bitmap of `Identity.id` values, and segment membership composes via Boolean ops on those bitmaps. Async maintenance runs via flagsmith-task-processor. Includes smoke tests covering the operator vocabulary end-to-end with a differential check against `is_context_in_segment`. Maintenance fires only when `settings.SEGMENT_MEMBERSHIP_ENABLED = True`, so this is dark-no-op in self-hosted and SaaS until enabled. beep boop
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This was referenced May 4, 2026
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docs/if required so people know about the feature.Changes
Contributes to #5663.
PoC for segment membership inspection. Adds the
segment_membershipDjango app: a Roaring-bitmap-backed index that lets us count, list, sample, and stream the identities matching a segment.Atoms are unary predicates over
(property, operator, operand); each unique atom owns one bitmap ofIdentity.idvalues, and segment membership composes via Boolean ops on those bitmaps. Async maintenance runs throughflagsmith-task-processor.Maintenance fires only when
settings.SEGMENT_MEMBERSHIP_ENABLED = True, so this is a dark no-op in self-hosted and SaaS until the flag is flipped. User-facing docs and the API surface will follow in separate PRs.How did you test this code?
pytest tests/unit/segment_membership— smoke tests cover the operator vocabulary end-to-end with a differential check againstis_context_in_segment.mypy segment_membership tests/unit/segment_membershipclean in strict mode.manage.py stress_test_segment_membership.