diff --git a/extensions/discord/src/channel.ts b/extensions/discord/src/channel.ts
index f8fc9576e6..4db082e32e 100644
--- a/extensions/discord/src/channel.ts
+++ b/extensions/discord/src/channel.ts
@@ -16,6 +16,7 @@ import {
   migrateBaseNameToDefaultAccount,
   normalizeAccountId,
   normalizeDiscordMessagingTarget,
+  normalizeDiscordOutboundTarget,
   PAIRING_APPROVED_MESSAGE,
   resolveDiscordAccount,
   resolveDefaultDiscordAccountId,
@@ -291,6 +292,7 @@ export const discordPlugin: ChannelPlugin<ResolvedDiscordAccount> = {
     chunker: null,
     textChunkLimit: 2000,
     pollMaxOptions: 10,
+    resolveTarget: ({ to }) => normalizeDiscordOutboundTarget(to),
     sendText: async ({ to, text, accountId, deps, replyToId, silent }) => {
       const send = deps?.sendDiscord ?? getDiscordRuntime().channel.discord.sendMessageDiscord;
       const result = await send(to, text, {
diff --git a/src/channels/plugins/normalize/discord.ts b/src/channels/plugins/normalize/discord.ts
index 43c3f67dda..1885582500 100644
--- a/src/channels/plugins/normalize/discord.ts
+++ b/src/channels/plugins/normalize/discord.ts
@@ -6,6 +6,29 @@ export function normalizeDiscordMessagingTarget(raw: string): string | undefined
   return target?.normalized;
 }
 
+/**
+ * Normalize a Discord outbound target for delivery. Bare numeric IDs are
+ * prefixed with "channel:" to avoid the ambiguous-target error in
+ * parseDiscordTarget. All other formats pass through unchanged.
+ */
+export function normalizeDiscordOutboundTarget(
+  to?: string,
+): { ok: true; to: string } | { ok: false; error: Error } {
+  const trimmed = to?.trim();
+  if (!trimmed) {
+    return {
+      ok: false,
+      error: new Error(
+        'Discord recipient is required. Use "channel:<id>" for channels or "user:<id>" for DMs.',
+      ),
+    };
+  }
+  if (/^\d+$/.test(trimmed)) {
+    return { ok: true, to: `channel:${trimmed}` };
+  }
+  return { ok: true, to: trimmed };
+}
+
 export function looksLikeDiscordTargetId(raw: string): boolean {
   const trimmed = raw.trim();
   if (!trimmed) {
diff --git a/src/channels/plugins/outbound/discord.test.ts b/src/channels/plugins/outbound/discord.test.ts
new file mode 100644
index 0000000000..dc80bd18ed
--- /dev/null
+++ b/src/channels/plugins/outbound/discord.test.ts
@@ -0,0 +1,35 @@
+import { describe, expect, it } from "vitest";
+import { normalizeDiscordOutboundTarget } from "../normalize/discord.js";
+
+describe("normalizeDiscordOutboundTarget", () => {
+  it("normalizes bare numeric IDs to channel: prefix", () => {
+    expect(normalizeDiscordOutboundTarget("1470130713209602050")).toEqual({
+      ok: true,
+      to: "channel:1470130713209602050",
+    });
+  });
+
+  it("passes through channel: prefixed targets", () => {
+    expect(normalizeDiscordOutboundTarget("channel:123")).toEqual({ ok: true, to: "channel:123" });
+  });
+
+  it("passes through user: prefixed targets", () => {
+    expect(normalizeDiscordOutboundTarget("user:123")).toEqual({ ok: true, to: "user:123" });
+  });
+
+  it("passes through channel name strings", () => {
+    expect(normalizeDiscordOutboundTarget("general")).toEqual({ ok: true, to: "general" });
+  });
+
+  it("returns error for empty target", () => {
+    expect(normalizeDiscordOutboundTarget("").ok).toBe(false);
+  });
+
+  it("returns error for undefined target", () => {
+    expect(normalizeDiscordOutboundTarget(undefined).ok).toBe(false);
+  });
+
+  it("trims whitespace", () => {
+    expect(normalizeDiscordOutboundTarget("  123  ")).toEqual({ ok: true, to: "channel:123" });
+  });
+});
diff --git a/src/channels/plugins/outbound/discord.ts b/src/channels/plugins/outbound/discord.ts
index 37affea5e0..82fbdd757b 100644
--- a/src/channels/plugins/outbound/discord.ts
+++ b/src/channels/plugins/outbound/discord.ts
@@ -1,11 +1,13 @@
 import type { ChannelOutboundAdapter } from "../types.js";
 import { sendMessageDiscord, sendPollDiscord } from "../../../discord/send.js";
+import { normalizeDiscordOutboundTarget } from "../normalize/discord.js";
 
 export const discordOutbound: ChannelOutboundAdapter = {
   deliveryMode: "direct",
   chunker: null,
   textChunkLimit: 2000,
   pollMaxOptions: 10,
+  resolveTarget: ({ to }) => normalizeDiscordOutboundTarget(to),
   sendText: async ({ to, text, accountId, deps, replyToId, silent }) => {
     const send = deps?.sendDiscord ?? sendMessageDiscord;
     const result = await send(to, text, {
diff --git a/src/plugin-sdk/index.ts b/src/plugin-sdk/index.ts
index e415f44189..bd0a06036f 100644
--- a/src/plugin-sdk/index.ts
+++ b/src/plugin-sdk/index.ts
@@ -328,6 +328,7 @@ export { discordOnboardingAdapter } from "../channels/plugins/onboarding/discord
 export {
   looksLikeDiscordTargetId,
   normalizeDiscordMessagingTarget,
+  normalizeDiscordOutboundTarget,
 } from "../channels/plugins/normalize/discord.js";
 export { collectDiscordStatusIssues } from "../channels/plugins/status-issues/discord.js";