1. Improvement WT-18316
    Assert that no transaction spans a step-up or an un-announced step-down
  2. Task WT-18283
    Add step-down observability metrics to Grafana
  3. Improvement WT-18270
    Close the layered cursor's leftover ingest cursor only on step-up
  4. Task WT-18259
    Investigate reads racing an async step-down against the stable table being marked read-only and outdated
  5. Bug WT-18253
    Cache stuck in disagg switch mode cache full: no
  6. Build Failure WT-18241
    test/format cache stuck panic over clean trigger (stepdown_async)
  7. Bug WT-18240
    Remove the assertion preventing schema ops concurrent with step-up
  8. Task WT-18234
    Async step-down: rely on transaction write-conflict detection, not the step-down mutex
  9. Task WT-18224
    test/format: advance timestamps before reconfiguring to leader to avoid cache-stuck on step-up
  10. Task WT-18220
    Add tests closing the identified async step-down coverage gaps on a validation branch
  11. Improvement WT-18209
    Extend layered cursor stress python test to cover async step down
  12. Task WT-18205
    Use atomic accesses for layered_table_manager.leader
  13. Bug WT-18179
    Layered cursor stable-mode assert races with disaggregated role step-down
  14. Build Failure WT-18125
    test/format (switch mode) task-timed-timedout or cache stuck
  15. Improvement WT-18120
    Prevent eviction walk starvation for a tree dominating cache usage
  16. Task WT-18116
    Enable synchronous (Elegant) Step-Down in WT test/python
  17. Build Failure WT-18107
    failed: format-stress-test-disagg-multi-delete-enabled-1 on amazon2023-disagg-stress [wiredtiger-disagg @ 7bf299ab]
  18. Build Failure WT-18103
    1. (read comment before linking BFGs) test/format (switch mode) task-timed-timedout
  19. Task WT-18100
    Include outdated dhandles in cache verbose dump accounting
  20. Bug WT-18098
    Unable to run wt tool to verify palite-backed database
  21. Task WT-18066
    [DOCS] Document Concurrency Model for Async Step-Down (Schema Operations & KEK Management)
  22. Task WT-18065
    [DOCS] Document Concurrency & Synchronisation Model for Async Step-Down
  23. Improvement WT-18058
    Replace ingest-table whole-table clear with incremental per-page drain
  24. Build Failure WT-18041
    failed: unit-test-zstd on ubuntu2004-release-arm64 [wiredtiger @ c29e0f15]
  25. Bug WT-17989
    test/format (mode=switch) [Elegant stepdown bugs] WT_ROLLBACK draining ingest table during step-up causes step-up failure
  26. Task WT-17961
    Discovery: Table Creation & Collection Scaling for Public Preview (DSC)
  27. Task WT-17955
    Add a metric to report the WT checkpoint pickup time at startup
  28. Task WT-17938
    Async Stepdown Test Coverage: test/model
  29. Bug WT-17935
    test/format (mode=switch) [Elegant stepdown bugs] split-gen assertion in __wt_evict fires for internal pages after elegant step-down
  30. Build Failure WT-17903
    format-stress-test-disagg-switch: cache stuck for too long, eviction thread panics
  31. Task WT-17897
    Async Stepdown Test Coverage: test/python
  32. Task WT-17896
    Async Stepdown Test Coverage: test/format
  33. Task WT-17895
    Core Async Stepdown Implementation
  34. Bug WT-17880
    Remove the assertion preventing schema ops concurrent with step-down
  35. Build Failure WT-17870
    test/format (disagg.mode=multi, deletes enables) hash mismatch b/w leader & follower
  36. Bug WT-17844
    test/format (mode=switch) [Elegant stepdown bugs] The stable btree should not contain inserts prior to draining
  37. Task WT-17821
    Spike: investigate and document the limitations of predictable replay
  38. Bug WT-17820
    test/format (mode=switch) [Elegant stepdown bugs] SIGSEGV in __split_internal_unlock during eviction from layered drain worker
  39. Bug WT-17819
    test/format (mode=switch) [Elegant stepdown bugs] No corresponding value exists on the stable table to delete
  40. Bug WT-17818
    test/format (mode=switch) [Elegant stepdown bugs] Follower evicts page with disagg_info (ref->page->disagg_info == NULL || leader)
  41. Bug WT-17817
    test/format (mode=switch) [Elegant stepdown bugs] Ingest drain finds stable btree in unexpected state (preserved prepared updates / inserts before drain)
  42. Bug WT-17816
    test/format (mode=switch) [Elegant stepdown bugs] Evicting dirty internal pages for disaggregated storage is not allowed
  43. Bug WT-17795
    test/format (mode=switch) [Elegant stepdown bugs] mirror mismatch
  44. Bug WT-17794
    test/format (mode=switch) [Elegant stepdown bugs] Attempting reconciliation on a read-only page
  45. Task WT-17792
    Develop dedicated workgen benchmark script for disaggregated startup sequence
  46. Task WT-17791
    Optimise direct ingest creation to mitigate core startup bottlenecks
  47. Task WT-17786
    Triage and Resolve Baseline Bugs on Elegant Step-Down Feature Branch
  48. Task WT-17785
    Enable synchronous (Elegant) Step-Down in WT test/format
  49. Task WT-17784
    Allow WT_CONN::set_timestamp to accept step_down_ts for planned step-down
  50. Bug WT-17783
    Missing prior (globally visible) updates in reconciliation chain during stepup truncate
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