diff --git a/design/followups.md b/design/followups.md
index 425fd6f..ddc923d 100644
--- a/design/followups.md
+++ b/design/followups.md
@@ -7,7 +7,7 @@ move to `## Resolved` with a date + commit hash.
 ## Open
 
 ### F18 — M5 plan of attack (ASB transport, parallel-safe sub-streams)
-**Severity:** P0 — milestone driver, blocks ASB consumers + V1 release
+**Status:** Resolved 2026-05-06 — all sub-followups F19–F26 closed, M5 functionally LIVE end-to-end (`asb-subscribe` returns the real tag value over the wire). Kept under Open as the milestone-tracker reference for the cumulative execution log; the structural-port followups it spawned (F2/F10/F11/F27 for NTLM/DCOM/RemUnknown/DH) all resolved separately. **Severity:** P0 — milestone driver, blocks ASB consumers + V1 release
 **Source:** `design/dependencies.md:73-89` + `design/60-roadmap.md:84-91` + `design/70-risks-and-open-questions.md:5-25` (R1 estimates ~3000 LoC for framing+encoders).
 
 **Scope.** Build the ASB data-plane end-to-end: