tidaldb/.sdlc/features/m9-leave-revocation/qa-plan.md

QA Plan: Leave & Stop-Forward (m9-leave-revocation)

Test Suite: tidal/tests/m9_leave_revocation.rs

8 integration tests covering:

• TC-01: leave_stops_cohort_fanout — baseline count > 0, leave, post-leave count unchanged
• TC-02: join_resumes_cohort_fanout — leave then rejoin, count increases after rejoin
• TC-03: leave_is_idempotent — two leave calls return Ok, second left_at_ns >= first
• TC-04: status_query_lifecycle — fresh=Active/None → leave=Left/Some → rejoin=Active/Some
• TC-05: left_at_ns_preserved_on_rejoin — left_at_ns unchanged after rejoin
• TC-06: durability_across_reopen — leave, close, reopen, status still Left with same left_at_ns
• TC-07: unknown_user_defaults_to_active — unknown user returns Active/None
• TC-08: leave_stops_community_forwarding — community:: key count unchanged after leave

Regression Suites

• cargo test --lib: all 1299 passing
• cargo test --test m6_cohort: all 9 passing

Clippy + Format

• cargo fmt --check: exit 0
• cargo clippy -- -D warnings: exit 0