diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64a07d9ef..527c637f4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@
 - Health: add per-agent session summaries and account-level health details, and allow selective probes. (#1047) — thanks @gumadeiras.
 
 ### Fixes
+- Sub-agents: route announce delivery through the correct channel account IDs. (#1061, #1058) — thanks @adam91holt.
 - Messages: `/stop` now hard-aborts queued followups and sub-agent runs; suppress zero-count stop notes.
 - Sessions: reset `compactionCount` on `/new` and `/reset`, and preserve `sessions.json` file mode (0600).
 - Sessions: repair orphaned user turns before embedded prompts.
diff --git a/src/agents/clawdbot-tools.ts b/src/agents/clawdbot-tools.ts
index e9efa14a4..b179795bc 100644
--- a/src/agents/clawdbot-tools.ts
+++ b/src/agents/clawdbot-tools.ts
@@ -108,6 +108,7 @@ export function createClawdbotTools(options?: {
     createSessionsSpawnTool({
       agentSessionKey: options?.agentSessionKey,
       agentChannel: options?.agentChannel,
+      agentAccountId: options?.agentAccountId,
       sandboxed: options?.sandboxed,
     }),
     createSessionStatusTool({
diff --git a/src/agents/subagent-announce.ts b/src/agents/subagent-announce.ts
index 6db380460..12fc5328d 100644
--- a/src/agents/subagent-announce.ts
+++ b/src/agents/subagent-announce.ts
@@ -306,6 +306,9 @@ async function sendAnnounce(item: AnnounceQueueItem) {
     params: {
       sessionKey: item.sessionKey,
       message: item.prompt,
+      channel: item.originatingChannel,
+      accountId: item.originatingAccountId,
+      to: item.originatingTo,
       deliver: true,
       idempotencyKey: crypto.randomUUID(),
     },
@@ -348,6 +351,7 @@ async function maybeQueueSubagentAnnounce(params: {
   requesterSessionKey: string;
   triggerMessage: string;
   summaryLine?: string;
+  requesterAccountId?: string;
 }): Promise<"steered" | "queued" | "none"> {
   const { cfg, entry } = loadRequesterSessionEntry(params.requesterSessionKey);
   const canonicalKey = resolveRequesterStoreKey(cfg, params.requesterSessionKey);
@@ -382,7 +386,7 @@ async function maybeQueueSubagentAnnounce(params: {
         sessionKey: canonicalKey,
         originatingChannel: entry?.lastChannel,
         originatingTo: entry?.lastTo,
-        originatingAccountId: entry?.lastAccountId,
+        originatingAccountId: entry?.lastAccountId ?? params.requesterAccountId,
       },
       queueSettings,
     );
@@ -505,6 +509,7 @@ export async function runSubagentAnnounceFlow(params: {
   childRunId: string;
   requesterSessionKey: string;
   requesterChannel?: string;
+  requesterAccountId?: string;
   requesterDisplayKey: string;
   task: string;
   timeoutMs: number;
@@ -600,6 +605,7 @@ export async function runSubagentAnnounceFlow(params: {
       requesterSessionKey: params.requesterSessionKey,
       triggerMessage,
       summaryLine: taskLabel,
+      requesterAccountId: params.requesterAccountId,
     });
     if (queued === "steered") {
       didAnnounce = true;
@@ -617,6 +623,8 @@ export async function runSubagentAnnounceFlow(params: {
         sessionKey: params.requesterSessionKey,
         message: triggerMessage,
         deliver: true,
+        channel: params.requesterChannel,
+        accountId: params.requesterAccountId,
         idempotencyKey: crypto.randomUUID(),
       },
       expectFinal: true,
diff --git a/src/agents/subagent-registry.ts b/src/agents/subagent-registry.ts
index 3dd821bef..6d36bdff7 100644
--- a/src/agents/subagent-registry.ts
+++ b/src/agents/subagent-registry.ts
@@ -13,6 +13,7 @@ export type SubagentRunRecord = {
   childSessionKey: string;
   requesterSessionKey: string;
   requesterChannel?: string;
+  requesterAccountId?: string;
   requesterDisplayKey: string;
   task: string;
   cleanup: "delete" | "keep";
@@ -59,6 +60,7 @@ function resumeSubagentRun(runId: string) {
       childRunId: entry.runId,
       requesterSessionKey: entry.requesterSessionKey,
       requesterChannel: entry.requesterChannel,
+      requesterAccountId: entry.requesterAccountId,
       requesterDisplayKey: entry.requesterDisplayKey,
       task: entry.task,
       timeoutMs: 30_000,
@@ -199,6 +201,7 @@ function ensureListener() {
       childRunId: entry.runId,
       requesterSessionKey: entry.requesterSessionKey,
       requesterChannel: entry.requesterChannel,
+      requesterAccountId: entry.requesterAccountId,
       requesterDisplayKey: entry.requesterDisplayKey,
       task: entry.task,
       timeoutMs: 30_000,
@@ -248,6 +251,7 @@ export function registerSubagentRun(params: {
   childSessionKey: string;
   requesterSessionKey: string;
   requesterChannel?: string;
+  requesterAccountId?: string;
   requesterDisplayKey: string;
   task: string;
   cleanup: "delete" | "keep";
@@ -264,6 +268,7 @@ export function registerSubagentRun(params: {
     childSessionKey: params.childSessionKey,
     requesterSessionKey: params.requesterSessionKey,
     requesterChannel: params.requesterChannel,
+    requesterAccountId: params.requesterAccountId,
     requesterDisplayKey: params.requesterDisplayKey,
     task: params.task,
     cleanup: params.cleanup,
@@ -318,6 +323,7 @@ async function waitForSubagentCompletion(runId: string, waitTimeoutMs: number) {
       childRunId: entry.runId,
       requesterSessionKey: entry.requesterSessionKey,
       requesterChannel: entry.requesterChannel,
+      requesterAccountId: entry.requesterAccountId,
       requesterDisplayKey: entry.requesterDisplayKey,
       task: entry.task,
       timeoutMs: 30_000,
diff --git a/src/agents/tools/sessions-spawn-tool.ts b/src/agents/tools/sessions-spawn-tool.ts
index 6ae8b8dc3..3c17a8252 100644
--- a/src/agents/tools/sessions-spawn-tool.ts
+++ b/src/agents/tools/sessions-spawn-tool.ts
@@ -48,6 +48,7 @@ function normalizeModelSelection(value: unknown): string | undefined {
 export function createSessionsSpawnTool(opts?: {
   agentSessionKey?: string;
   agentChannel?: GatewayMessageChannel;
+  agentAccountId?: string;
   sandboxed?: boolean;
 }): AnyAgentTool {
   return {
@@ -206,6 +207,7 @@ export function createSessionsSpawnTool(opts?: {
         childSessionKey,
         requesterSessionKey: requesterInternalKey,
         requesterChannel: opts?.agentChannel,
+        requesterAccountId: opts?.agentAccountId,
         requesterDisplayKey,
         task,
         cleanup,
diff --git a/src/commands/agent/delivery.ts b/src/commands/agent/delivery.ts
index 4c24a5b61..580e3222d 100644
--- a/src/commands/agent/delivery.ts
+++ b/src/commands/agent/delivery.ts
@@ -48,13 +48,19 @@ export async function deliverAgentCommandResult(params: {
 
   const targetMode: ChannelOutboundTargetMode =
     opts.deliveryTargetMode ?? (opts.to ? "explicit" : "implicit");
+  const resolvedAccountId =
+    typeof opts.accountId === "string" && opts.accountId.trim()
+      ? opts.accountId.trim()
+      : targetMode === "implicit"
+        ? sessionEntry?.lastAccountId
+        : undefined;
   const resolvedTarget =
     deliver && isDeliveryChannelKnown && deliveryChannel
       ? resolveOutboundTarget({
           channel: deliveryChannel,
           to: opts.to,
           cfg,
-          accountId: targetMode === "implicit" ? sessionEntry?.lastAccountId : undefined,
+          accountId: resolvedAccountId,
           mode: targetMode,
         })
       : null;
@@ -112,6 +118,7 @@ export async function deliverAgentCommandResult(params: {
         cfg,
         channel: deliveryChannel,
         to: deliveryTarget,
+        accountId: resolvedAccountId,
         payloads: deliveryPayloads,
         bestEffort: bestEffortDeliver,
         onError: (err) => logDeliveryError(err),
diff --git a/src/commands/agent/types.ts b/src/commands/agent/types.ts
index 3451f11a9..ff0637669 100644
--- a/src/commands/agent/types.ts
+++ b/src/commands/agent/types.ts
@@ -23,6 +23,8 @@ export type AgentCommandOpts = {
   /** Message channel context (webchat|voicewake|whatsapp|...). */
   messageChannel?: string;
   channel?: string; // delivery channel (whatsapp|telegram|...)
+  /** Account ID for multi-account channel routing (e.g., WhatsApp account). */
+  accountId?: string;
   deliveryTargetMode?: ChannelOutboundTargetMode;
   bestEffortDeliver?: boolean;
   abortSignal?: AbortSignal;
diff --git a/src/gateway/protocol/schema/agent.ts b/src/gateway/protocol/schema/agent.ts
index cf0b8be7f..0d594b3a9 100644
--- a/src/gateway/protocol/schema/agent.ts
+++ b/src/gateway/protocol/schema/agent.ts
@@ -52,6 +52,7 @@ export const AgentParamsSchema = Type.Object(
     deliver: Type.Optional(Type.Boolean()),
     attachments: Type.Optional(Type.Array(Type.Unknown())),
     channel: Type.Optional(Type.String()),
+    accountId: Type.Optional(Type.String()),
     timeout: Type.Optional(Type.Integer({ minimum: 0 })),
     lane: Type.Optional(Type.String()),
     extraSystemPrompt: Type.Optional(Type.String()),
diff --git a/src/gateway/server-methods/agent.ts b/src/gateway/server-methods/agent.ts
index 3f15ad320..63452a584 100644
--- a/src/gateway/server-methods/agent.ts
+++ b/src/gateway/server-methods/agent.ts
@@ -60,6 +60,7 @@ export const agentHandlers: GatewayRequestHandlers = {
         content?: unknown;
       }>;
       channel?: string;
+      accountId?: string;
       lane?: string;
       extraSystemPrompt?: string;
       idempotencyKey: string;
@@ -199,6 +200,10 @@ export const agentHandlers: GatewayRequestHandlers = {
 
     const lastChannel = sessionEntry?.lastChannel;
     const lastTo = typeof sessionEntry?.lastTo === "string" ? sessionEntry.lastTo.trim() : "";
+    const resolvedAccountId =
+      typeof request.accountId === "string" && request.accountId.trim()
+        ? request.accountId.trim()
+        : sessionEntry?.lastAccountId;
 
     const wantsDelivery = request.deliver === true;
 
@@ -235,7 +240,7 @@ export const agentHandlers: GatewayRequestHandlers = {
       const fallback = resolveOutboundTarget({
         channel: resolvedChannel,
         cfg,
-        accountId: sessionEntry?.lastAccountId ?? undefined,
+        accountId: resolvedAccountId,
         mode: "implicit",
       });
       if (fallback.ok) {
@@ -269,6 +274,7 @@ export const agentHandlers: GatewayRequestHandlers = {
         deliver,
         deliveryTargetMode,
         channel: resolvedChannel,
+        accountId: resolvedAccountId,
         timeout: request.timeout?.toString(),
         bestEffortDeliver,
         messageChannel: resolvedChannel,