Skip to content
Catalyst Catalyst Catalyst

Catalyst Dev — Change Log
All versions All versions forward

Version 12.26.0

Jul 08, 2026

Linear Read Observability & Actuation Liveness

Every Linear read now emits a catalyst.linear.read event with source and result attributes, so your OTEL collector can derive read totals and a staleness histogram — and alert on replica bypasses before the 429 breaker trips. The delegate’s board-scan events now record whether a proposed move was actually dispatched, and a new checkActuationLiveness invariant flags sustained propose-but-never-dispatch conditions automatically. A negative cache on terminal-probe and census reads stops replica-miss tickets from firing live Linear reads every tick, which was the primary driver of breaker flaps.

PRs

  • dev: CTL-1403 — emit reads-by-source (catalyst.linear.read{source,result}) on every Linear read (#2582) (d23e8b1)
  • dev: CTL-1435 (WS-C C1+C2) — self-observing actuation-liveness (act-outcome on board-scan + checkActuationLiveness invariant) (#2576) (06bb61f)
  • dev: CTL-1436 (WS-A A4) — negative-cache fetchTicketState replica-MISS live reads (stop the issues-read breaker flap) (#2579) (7f99ddc)
  • dev: CTL-1437 (A4 follow-up) — widen probeBackoff to the every-tick terminal-Done sweep (#2581) (52d58cc)