diff --git a/CHANGELOG.md b/CHANGELOG.md
index af02c08d..44478806 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Send message results now surface server-advised retry time for plain rate-limit (HTTP 413) failures, not only for proof-required challenges. The `retryAfterSeconds` field in JSON-RPC `SendMessageResult` is populated whenever the server sends a `Retry-After` header. The canonical way to distinguish proof-required failures remains `token != null`. Text output includes "retry after N seconds" when known.
+
 ## [0.14.2] - 2026-04-04
 
 ### Added
diff --git a/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResult.java b/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResult.java
index 081a7873..82b83aa9 100644
--- a/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResult.java
+++ b/lib/src/main/java/org/asamk/signal/manager/api/SendMessageResult.java
@@ -15,6 +15,32 @@ public record SendMessageResult(
         Long rateLimitRetryAfterSeconds
 ) {
 
+    /**
+     * Source-compatible constructor for callers built against the pre-retry-after record shape.
+     * Delegates to the canonical constructor with a null retry-after, which is the correct value
+     * for any result not produced by {@link #from}.
+     */
+    public SendMessageResult(
+            RecipientAddress address,
+            boolean isSuccess,
+            boolean isNetworkFailure,
+            boolean isUnregisteredFailure,
+            boolean isIdentityFailure,
+            boolean isRateLimitFailure,
+            ProofRequiredException proofRequiredFailure,
+            boolean isInvalidPreKeyFailure
+    ) {
+        this(address,
+                isSuccess,
+                isNetworkFailure,
+                isUnregisteredFailure,
+                isIdentityFailure,
+                isRateLimitFailure,
+                proofRequiredFailure,
+                isInvalidPreKeyFailure,
+                null);
+    }
+
     public static SendMessageResult unregisteredFailure(RecipientAddress address) {
         return new SendMessageResult(address, false, false, true, false, false, null, false, null);
     }
diff --git a/lib/src/test/java/org/asamk/signal/manager/api/SendMessageResultTest.java b/lib/src/test/java/org/asamk/signal/manager/api/SendMessageResultTest.java
index fd5b2b93..b4a4bf4e 100644
--- a/lib/src/test/java/org/asamk/signal/manager/api/SendMessageResultTest.java
+++ b/lib/src/test/java/org/asamk/signal/manager/api/SendMessageResultTest.java
@@ -3,6 +3,7 @@ package org.asamk.signal.manager.api;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 class SendMessageResultTest {
 
@@ -21,4 +22,17 @@ class SendMessageResultTest {
         assertEquals(2L, SendMessageResult.millisToCeilingSeconds(1500L));
         assertEquals(60L, SendMessageResult.millisToCeilingSeconds(60_000L));
     }
+
+    /**
+     * Source-compat: callers built against the pre-retry-after record shape use the 8-arg
+     * constructor. It must continue to compile and produce a record with a null retry-after.
+     */
+    @Test
+    @SuppressWarnings("deprecation")
+    void legacyEightArgConstructorPreservesSourceCompat() {
+        var result = new SendMessageResult(new RecipientAddress(null, null, "+15551234567", null),
+                true, false, false, false, false, null, false);
+
+        assertNull(result.rateLimitRetryAfterSeconds());
+    }
 }