diff --git a/docs/plans/2026-05-20-centralized-audit-log.md b/docs/plans/2026-05-20-centralized-audit-log.md
index a6becf7..afa71bc 100644
--- a/docs/plans/2026-05-20-centralized-audit-log.md
+++ b/docs/plans/2026-05-20-centralized-audit-log.md
@@ -203,7 +203,7 @@ Under the Types section, add:
 **Step 4: Add to `Messages/`**
 
 - `AuditTelemetryEnvelope` — gRPC message wrapping a batch of `AuditEvent` rows for telemetry forwarding.
-- `CachedOperationTelemetry` — additively-evolved version of the existing SiteCalls telemetry message: now also carries `AuditEvent` content alongside the operational `SiteCalls` upsert fields. Note additive-only evolution rule (per existing project convention).
+- `CachedCallTelemetry` — the existing SiteCalls telemetry message, additively extended in place to also carry `AuditEvent` content alongside the operational `SiteCalls` upsert fields. Do NOT rename; per `Component-Commons.md` REQ-COM-5a, message renames are breaking changes. Extend the existing entry's description.
 
 **Step 5: Verify**