diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c1a298b51b..21906d1a3bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@ Docs: https://docs.openclaw.ai
 - Plugin command/runtime hardening: validate and normalize plugin command name/description at registration boundaries, and guard Telegram native menu normalization paths so malformed plugin command specs cannot crash startup (`trim` on undefined). (#31997) Fixes #31944. Thanks @liuxiaopai-ai.
 - Telegram: guard duplicate-token checks and gateway startup token normalization when account tokens are missing, preventing `token.trim()` crashes during status/start flows. (#31973) Thanks @ningding97.
 - Discord/lifecycle startup status: push an immediate `connected` status snapshot when the gateway is already connected before lifecycle debug listeners attach, with abort-guarding to avoid contradictory status flips during pre-aborted startup. (#32336) Thanks @mitchmcalister.
+- Feishu/LINE group system prompts: forward per-group `systemPrompt` config into inbound context `GroupSystemPrompt` for Feishu and LINE group/room events so configured group-specific behavior actually applies at dispatch time. (#31713) Thanks @whiskyboy.
 - Mentions/Slack formatting hardening: add null-safe guards for runtime text normalization paths so malformed/undefined text payloads do not crash mention stripping or mrkdwn conversion. (#31865) Thanks @stone-jin.
 - Feishu/Plugin sdk compatibility: add safe webhook default fallbacks when loading Feishu monitor state so mixed-version installs no longer crash if older `openclaw/plugin-sdk` builds omit webhook default constants. (#31606)
 - Feishu/group broadcast dispatch: add configurable multi-agent group broadcast dispatch with observer-session isolation, cross-account dedupe safeguards, and non-mention history buffering rules that avoid duplicate replay in broadcast/topic workflows. (#29575) Thanks @ohmyskyhigh.
diff --git a/extensions/feishu/src/bot.ts b/extensions/feishu/src/bot.ts
index 1b4f2211b16..f9cd3670c2b 100644
--- a/extensions/feishu/src/bot.ts
+++ b/extensions/feishu/src/bot.ts
@@ -1288,6 +1288,7 @@ export async function handleFeishuMessage(params: {
         CommandAuthorized: commandAuthorized,
         OriginatingChannel: "feishu" as const,
         OriginatingTo: feishuTo,
+        GroupSystemPrompt: isGroup ? groupConfig?.systemPrompt?.trim() || undefined : undefined,
         ...mediaPayload,
       });
 
diff --git a/src/line/bot-message-context.ts b/src/line/bot-message-context.ts
index 65c055a6d4b..46d2e48b833 100644
--- a/src/line/bot-message-context.ts
+++ b/src/line/bot-message-context.ts
@@ -10,7 +10,7 @@ import { recordChannelActivity } from "../infra/channel-activity.js";
 import { resolveAgentRoute } from "../routing/resolve-route.js";
 import { resolvePinnedMainDmOwnerFromAllowlist } from "../security/dm-policy-shared.js";
 import { normalizeAllowFrom } from "./bot-access.js";
-import type { ResolvedLineAccount } from "./types.js";
+import type { ResolvedLineAccount, LineGroupConfig } from "./types.js";
 
 interface MediaRef {
   path: string;
@@ -206,6 +206,20 @@ function resolveLineAddresses(params: {
   return { fromAddress, toAddress, originatingTo };
 }
 
+function resolveLineGroupSystemPrompt(
+  groups: Record<string, LineGroupConfig | undefined> | undefined,
+  source: LineSourceInfoWithPeerId,
+): string | undefined {
+  if (!groups) {
+    return undefined;
+  }
+  const entry =
+    (source.groupId ? (groups[source.groupId] ?? groups[`group:${source.groupId}`]) : undefined) ??
+    (source.roomId ? (groups[source.roomId] ?? groups[`room:${source.roomId}`]) : undefined) ??
+    groups["*"];
+  return entry?.systemPrompt?.trim() || undefined;
+}
+
 async function finalizeLineInboundContext(params: {
   cfg: OpenClawConfig;
   account: ResolvedLineAccount;
@@ -288,6 +302,9 @@ async function finalizeLineInboundContext(params: {
     ...params.locationContext,
     OriginatingChannel: "line" as const,
     OriginatingTo: originatingTo,
+    GroupSystemPrompt: params.source.isGroup
+      ? resolveLineGroupSystemPrompt(params.account.config.groups, params.source)
+      : undefined,
   });
 
   const pinnedMainDmOwner = !params.source.isGroup