diff --git a/internal/ffi/doc.go b/internal/ffi/doc.go
index de4ccfe..c62b885 100644
--- a/internal/ffi/doc.go
+++ b/internal/ffi/doc.go
@@ -1,7 +1,9 @@
-// Package ffi groups the cgo bridges over the logos-delivery C libraries.
+// Package ffi groups the cgo bridges over liblogosdelivery, the unified
+// logos-delivery C library.
 //
-// Each C library gets its own subpackage (libwaku now; liblogosdelivery in a
-// follow-up) so that a binary links exactly the libraries it imports — the
-// two .so files carry overlapping symbols and must never be linked together
-// (until logos-delivery#3851 consolidates them).
+// Each ABI gets its own subpackage — libwaku for the legacy waku_* Kernel API,
+// liblogosdelivery for the logosdelivery_* Messaging API. Since
+// logos-delivery#3949 merged the two libraries into one, both bridges link the
+// same liblogosdelivery and may coexist in a single binary; the split is kept
+// purely so callers import only the ABI they use.
 package ffi
diff --git a/internal/ffi/liblogosdelivery/liblogosdelivery.go b/internal/ffi/liblogosdelivery/liblogosdelivery.go
index 5f91d8a..d68e0de 100644
--- a/internal/ffi/liblogosdelivery/liblogosdelivery.go
+++ b/internal/ffi/liblogosdelivery/liblogosdelivery.go
@@ -4,9 +4,10 @@
 // handle->handler registry, and exposes Go-typed primitives so the public
 // messaging package stays pure Go.
 //
-// It links liblogosdelivery via a #cgo directive; it must never be linked into
-// the same binary as the libwaku bridge (overlapping symbols) until
-// logos-delivery#3851 consolidates the two libraries.
+// It links liblogosdelivery via a #cgo directive. Since logos-delivery#3949
+// unified the libraries, liblogosdelivery exposes both the logosdelivery_* and
+// the legacy waku_* ABIs, so this bridge and the libwaku bridge can safely
+// share a binary.
 package liblogosdelivery
 
 /*
diff --git a/internal/ffi/libwaku/libwaku.go b/internal/ffi/libwaku/libwaku.go
index 2f5279e..37c628e 100644
--- a/internal/ffi/libwaku/libwaku.go
+++ b/internal/ffi/libwaku/libwaku.go
@@ -1,12 +1,16 @@
-// Package libwaku is the cgo bridge over libwaku (the legacy Kernel API
-// library): the synchronous request/callback plumbing, the global event
-// callback, and the handle registry. It exposes Go-typed primitives so
-// pkg/kernel stays pure Go.
+// Package libwaku is the cgo bridge over the legacy Kernel API (the waku_*
+// ABI): the synchronous request/callback plumbing, the global event callback,
+// and the handle registry. It exposes Go-typed primitives so pkg/kernel stays
+// pure Go.
+//
+// Since logos-delivery#3949 the waku_* ABI ships inside the unified
+// liblogosdelivery library (libwaku is gone), so this bridge links
+// liblogosdelivery and includes its header.
 package libwaku
 
 /*
-#cgo LDFLAGS: -lwaku
-#include <libwaku.h>
+#cgo LDFLAGS: -llogosdelivery
+#include <liblogosdelivery.h>
 #include <stdlib.h>
 
 // wakuGoCallback (sync request/response) and wakuEventCallback (async events)
@@ -57,8 +61,9 @@ static void cGoWakuVersion(void* ctx, void* resp) {
 }
 static void cGoWakuSetEventCallback(void* ctx) {
 	// The ctx doubles as userData so the shared event callback can route the
-	// event to the right registered handler.
-	set_event_callback(ctx, (FFICallBack) wakuEventCallback, ctx);
+	// event to the right registered handler. Since logos-delivery#3949 both
+	// ABIs share the single logosdelivery_set_event_callback setter.
+	logosdelivery_set_event_callback(ctx, (FFICallBack) wakuEventCallback, ctx);
 }
 static void cGoWakuRelayPublish(void* ctx, const char* pubSubTopic, const char* jsonWakuMessage, int timeoutMs, void* resp) {
 	waku_relay_publish(ctx, (FFICallBack) wakuGoCallback, resp, pubSubTopic, jsonWakuMessage, timeoutMs);