diff --git a/docs/m19-m20-plan.md b/docs/m19-m20-plan.md
index 881839d..b98979b 100644
--- a/docs/m19-m20-plan.md
+++ b/docs/m19-m20-plan.md
@@ -105,7 +105,7 @@ branch is green; keep branches; push everything.
       read is under the big lock and the arithmetic is guarded, and pci-bus
       skips size-0 BARs. discovery.md updated; suite 55/55 (driver-restart
       hammered 6×).
-- [ ] **merge** `feat/pci-bus` → main, push.
+- [x] **merge** `feat/pci-bus` → main, push (merged 2026-07-13).
 - [ ] **M20.1** — acpi service, parse only (fills the existing placeholder at
       system/services/acpi/acpi.zig): kernel publishes `acpi-tables`
       (decision 5) — memory over the table blobs, the broad io_port grant, and