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tidaldb/.sdlc/features/m9-community-profile-sync/qa-results.md

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QA Results: Community Profile Sync (m9-community-profile-sync)

Test Execution Summary

Suite Command Result Count
Unit + lib tests cargo test --lib PASS 1299 passed, 0 failed
Integration: m9_community_sync cargo test --test m9_community_sync PASS 10 passed, 0 failed
Clippy lint gate cargo clippy --lib -- -D warnings PASS 0 warnings
Format check cargo fmt --check PASS clean

Overall: PASS

Integration Test Results (m9_community_sync)

Execution time: 4.63s

Test Result
join_and_query_membership ok
join_idempotent ok
invalid_community_name_empty ok
invalid_community_name_too_long ok
signal_routes_to_community_aggregate ok
nonmember_signal_not_forwarded ok
forwarding_does_not_block_primary_write ok
multiple_communities_independent ok
community_aggregate_windowed_count ok
membership_persists_across_restart ok

All 10 integration tests passed. Tests cover the full feature surface:

  • Membership join + query API
  • Idempotent join
  • Input validation (empty name, name > 64 chars)
  • Signal forwarding to CohortSignalLedger
  • Gate: non-member signals are not forwarded
  • Primary write path unblocked (best-effort semantics)
  • Multiple independent communities per user
  • Windowed counts on community aggregates
  • Membership durability across process restart

Regression Check

The 1299 lib unit tests cover all prior milestones (m1–m8) and the new m9 components. Zero regressions introduced by this feature.

Acceptance Criteria Verification

Criterion Status
join_community(user_id, community) persists via Tag::CommunityMembership PASS (membership_persists_across_restart)
In-memory CommunityMembershipIndex rebuilt on startup PASS (membership_persists_across_restart)
signal_with_context forwards to CohortSignalLedger for members PASS (signal_routes_to_community_aggregate)
Non-members are not forwarded PASS (nonmember_signal_not_forwarded)
Forwarding is best-effort, primary write not blocked PASS (forwarding_does_not_block_primary_write)
Community aggregates support windowed counts PASS (community_aggregate_windowed_count)
Community name validated (non-empty, max 64 chars) PASS (invalid_community_name_empty, invalid_community_name_too_long)
Multiple communities per user are independent PASS (multiple_communities_independent)

All 8 acceptance criteria verified: PASS

Open Issues

  • Medium (non-blocking): No cap on CommunityMembershipIndex entries per user. In adversarial conditions a user could join O(N) communities causing memory growth. Tracked as future work.

Verdict: PASS