diff --git a/src/channels/plugins/doctor-contract-api.ts b/src/channels/plugins/doctor-contract-api.ts
index 2bd848aac86..69657674b94 100644
--- a/src/channels/plugins/doctor-contract-api.ts
+++ b/src/channels/plugins/doctor-contract-api.ts
@@ -1,8 +1,17 @@
 import type { LegacyConfigRule } from "../../config/legacy.shared.js";
+import type { OpenClawConfig } from "../../config/types.js";
 import { loadBundledPluginPublicArtifactModuleSync } from "../../plugins/public-surface-loader.js";
 
+type BundledChannelDoctorCompatibilityMutation = {
+  config: OpenClawConfig;
+  changes: string[];
+};
+
 type BundledChannelDoctorContractApi = {
   legacyConfigRules?: readonly LegacyConfigRule[];
+  normalizeCompatibilityConfig?: (params: {
+    cfg: OpenClawConfig;
+  }) => BundledChannelDoctorCompatibilityMutation;
 };
 
 function loadBundledChannelPublicArtifact(
diff --git a/src/commands/doctor-config-flow.test.ts b/src/commands/doctor-config-flow.test.ts
index f143e30b9fe..20c8a07545e 100644
--- a/src/commands/doctor-config-flow.test.ts
+++ b/src/commands/doctor-config-flow.test.ts
@@ -60,7 +60,55 @@ vi.mock("../config/validation.js", () => ({
 }));
 
 vi.mock("../channels/plugins/bootstrap-registry.js", () => ({
-  getBootstrapChannelPlugin: vi.fn(() => undefined),
+  getBootstrapChannelPlugin: vi.fn((channelId: string) => {
+    if (channelId !== "discord") {
+      return undefined;
+    }
+    return {
+      doctor: {
+        normalizeCompatibilityConfig: ({
+          cfg,
+        }: {
+          cfg: { channels?: { discord?: Record<string, unknown> } };
+        }) => {
+          const discord = cfg.channels?.discord;
+          if (!discord) {
+            return { config: cfg, changes: [] };
+          }
+          if (
+            !("streamMode" in discord) &&
+            typeof discord.streaming !== "boolean" &&
+            typeof discord.streaming !== "string"
+          ) {
+            return { config: cfg, changes: [] };
+          }
+          const next = structuredClone(cfg);
+          const nextDiscord = next.channels?.discord;
+          if (!nextDiscord) {
+            return { config: cfg, changes: [] };
+          }
+          const nextStreaming =
+            nextDiscord.streaming && typeof nextDiscord.streaming === "object"
+              ? { ...(nextDiscord.streaming as Record<string, unknown>) }
+              : {};
+          if (!("mode" in nextStreaming)) {
+            nextStreaming.mode =
+              nextDiscord.streamMode === "block"
+                ? "partial"
+                : nextDiscord.streaming === false
+                  ? "off"
+                  : "partial";
+          }
+          delete nextDiscord.streamMode;
+          nextDiscord.streaming = nextStreaming;
+          return {
+            config: next,
+            changes: ["Discord allowlist ids normalized to strings."],
+          };
+        },
+      },
+    };
+  }),
 }));
 
 vi.mock("../plugins/doctor-contract-registry.js", () => {
@@ -535,6 +583,43 @@ vi.mock("./doctor-config-preflight.js", async () => {
     return process.env.OPENCLAW_CONFIG_PATH || path.join(stateDir, "openclaw.json");
   }
 
+  function normalizeDiscordStreamingCompat(cfg: Record<string, unknown>): Record<string, unknown> {
+    const channels =
+      cfg.channels && typeof cfg.channels === "object" && !Array.isArray(cfg.channels)
+        ? (cfg.channels as Record<string, unknown>)
+        : null;
+    const discord =
+      channels?.discord && typeof channels.discord === "object" && !Array.isArray(channels.discord)
+        ? (channels.discord as Record<string, unknown>)
+        : null;
+    if (
+      !discord ||
+      (!("streamMode" in discord) &&
+        typeof discord.streaming !== "boolean" &&
+        typeof discord.streaming !== "string")
+    ) {
+      return cfg;
+    }
+    const next = structuredClone(cfg);
+    const nextDiscord = ((next.channels as Record<string, unknown> | undefined)?.discord ??
+      {}) as Record<string, unknown>;
+    const nextStreaming =
+      nextDiscord.streaming && typeof nextDiscord.streaming === "object"
+        ? { ...(nextDiscord.streaming as Record<string, unknown>) }
+        : {};
+    if (!("mode" in nextStreaming)) {
+      nextStreaming.mode =
+        nextDiscord.streamMode === "block"
+          ? "partial"
+          : nextDiscord.streaming === false
+            ? "off"
+            : "partial";
+    }
+    delete nextDiscord.streamMode;
+    nextDiscord.streaming = nextStreaming;
+    return next;
+  }
+
   return {
     runDoctorConfigPreflight: vi.fn(async () => {
       const injected = getDoctorConfigInputForTest();
@@ -596,7 +681,7 @@ vi.mock("./doctor-config-preflight.js", async () => {
         }),
       );
       const compat = applyRuntimeLegacyConfigMigrations(parsed);
-      const effectiveConfig = compat.next ?? parsed;
+      const effectiveConfig = normalizeDiscordStreamingCompat(compat.next ?? parsed);
       return {
         snapshot: {
           exists,
diff --git a/src/commands/doctor/shared/channel-legacy-config-migrate.test.ts b/src/commands/doctor/shared/channel-legacy-config-migrate.test.ts
index b8a68c1d58b..6786d7ceb0d 100644
--- a/src/commands/doctor/shared/channel-legacy-config-migrate.test.ts
+++ b/src/commands/doctor/shared/channel-legacy-config-migrate.test.ts
@@ -1,12 +1,23 @@
-import { beforeAll, describe, expect, it, vi } from "vitest";
+import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 const applyPluginDoctorCompatibilityMigrations = vi.hoisted(() => vi.fn());
+const loadBundledChannelDoctorContractApi = vi.hoisted(() => vi.fn());
+const getBootstrapChannelPlugin = vi.hoisted(() => vi.fn());
 
 vi.mock("../../../plugins/doctor-contract-registry.js", () => ({
   applyPluginDoctorCompatibilityMigrations: (...args: unknown[]) =>
     applyPluginDoctorCompatibilityMigrations(...args),
 }));
 
+vi.mock("../../../channels/plugins/doctor-contract-api.js", () => ({
+  loadBundledChannelDoctorContractApi: (...args: unknown[]) =>
+    loadBundledChannelDoctorContractApi(...args),
+}));
+
+vi.mock("../../../channels/plugins/bootstrap-registry.js", () => ({
+  getBootstrapChannelPlugin: (...args: unknown[]) => getBootstrapChannelPlugin(...args),
+}));
+
 let applyChannelDoctorCompatibilityMigrations: typeof import("./channel-legacy-config-migrate.js").applyChannelDoctorCompatibilityMigrations;
 
 beforeAll(async () => {
@@ -17,8 +28,59 @@ beforeAll(async () => {
     await import("./channel-legacy-config-migrate.js"));
 });
 
+beforeEach(() => {
+  applyPluginDoctorCompatibilityMigrations.mockReset();
+  loadBundledChannelDoctorContractApi.mockReset();
+  getBootstrapChannelPlugin.mockReset();
+});
+
 describe("bundled channel legacy config migrations", () => {
+  it("prefers bundled channel doctor contract normalizers before plugin registry fallback", () => {
+    loadBundledChannelDoctorContractApi.mockImplementation((channelId: string) =>
+      channelId === "slack"
+        ? {
+            normalizeCompatibilityConfig: ({
+              cfg,
+            }: {
+              cfg: { channels?: { slack?: Record<string, unknown> } };
+            }) => ({
+              config: {
+                ...cfg,
+                channels: {
+                  ...cfg.channels,
+                  slack: {
+                    ...cfg.channels?.slack,
+                    normalizedByBundledContract: true,
+                  },
+                },
+              },
+              changes: ["Normalized channels.slack via bundled doctor contract."],
+            }),
+          }
+        : undefined,
+    );
+    getBootstrapChannelPlugin.mockReturnValue(undefined);
+
+    const result = applyChannelDoctorCompatibilityMigrations({
+      channels: {
+        slack: {
+          streaming: true,
+        },
+      },
+    });
+
+    expect(applyPluginDoctorCompatibilityMigrations).not.toHaveBeenCalled();
+    expect(loadBundledChannelDoctorContractApi).toHaveBeenCalledWith("slack");
+    expect(result.next.channels?.slack).toMatchObject({
+      streaming: true,
+      normalizedByBundledContract: true,
+    });
+    expect(result.changes).toEqual(["Normalized channels.slack via bundled doctor contract."]);
+  });
+
   it("normalizes legacy private-network aliases exposed through bundled contract surfaces", () => {
+    loadBundledChannelDoctorContractApi.mockReturnValue(undefined);
+    getBootstrapChannelPlugin.mockReturnValue(undefined);
     applyPluginDoctorCompatibilityMigrations.mockReturnValueOnce({
       config: {
         channels: {
diff --git a/src/commands/doctor/shared/channel-legacy-config-migrate.ts b/src/commands/doctor/shared/channel-legacy-config-migrate.ts
index 0d72745bc01..1baa3886b3e 100644
--- a/src/commands/doctor/shared/channel-legacy-config-migrate.ts
+++ b/src/commands/doctor/shared/channel-legacy-config-migrate.ts
@@ -1,7 +1,18 @@
+import { getBootstrapChannelPlugin } from "../../../channels/plugins/bootstrap-registry.js";
+import { loadBundledChannelDoctorContractApi } from "../../../channels/plugins/doctor-contract-api.js";
 import type { OpenClawConfig } from "../../../config/types.js";
 import { applyPluginDoctorCompatibilityMigrations } from "../../../plugins/doctor-contract-registry.js";
 import { isRecord } from "./legacy-config-record-shared.js";
 
+type ChannelDoctorCompatibilityMutation = {
+  config: OpenClawConfig;
+  changes: string[];
+};
+
+type ChannelDoctorCompatibilityNormalizer = (params: {
+  cfg: OpenClawConfig;
+}) => ChannelDoctorCompatibilityMutation;
+
 function collectRelevantDoctorChannelIds(raw: unknown): string[] {
   const channels = isRecord(raw) && isRecord(raw.channels) ? raw.channels : null;
   if (!channels) {
@@ -12,15 +23,49 @@ function collectRelevantDoctorChannelIds(raw: unknown): string[] {
     .toSorted();
 }
 
+function resolveBundledChannelCompatibilityNormalizer(
+  channelId: string,
+): ChannelDoctorCompatibilityNormalizer | undefined {
+  const contractNormalizer =
+    loadBundledChannelDoctorContractApi(channelId)?.normalizeCompatibilityConfig;
+  if (typeof contractNormalizer === "function") {
+    return contractNormalizer;
+  }
+  return getBootstrapChannelPlugin(channelId)?.doctor?.normalizeCompatibilityConfig;
+}
+
 export function applyChannelDoctorCompatibilityMigrations(cfg: Record<string, unknown>): {
   next: Record<string, unknown>;
   changes: string[];
 } {
-  const compat = applyPluginDoctorCompatibilityMigrations(cfg as OpenClawConfig, {
-    pluginIds: collectRelevantDoctorChannelIds(cfg),
-  });
+  let nextCfg = cfg as OpenClawConfig;
+  const changes: string[] = [];
+  const unresolvedChannelIds: string[] = [];
+
+  for (const channelId of collectRelevantDoctorChannelIds(cfg)) {
+    const normalizeCompatibilityConfig = resolveBundledChannelCompatibilityNormalizer(channelId);
+    if (!normalizeCompatibilityConfig) {
+      unresolvedChannelIds.push(channelId);
+      continue;
+    }
+    const mutation = normalizeCompatibilityConfig({ cfg: nextCfg });
+    if (!mutation || mutation.changes.length === 0) {
+      continue;
+    }
+    nextCfg = mutation.config;
+    changes.push(...mutation.changes);
+  }
+
+  if (unresolvedChannelIds.length > 0) {
+    const compat = applyPluginDoctorCompatibilityMigrations(nextCfg, {
+      pluginIds: unresolvedChannelIds,
+    });
+    nextCfg = compat.config;
+    changes.push(...compat.changes);
+  }
+
   return {
-    next: compat.config as OpenClawConfig & Record<string, unknown>,
-    changes: compat.changes,
+    next: nextCfg as OpenClawConfig & Record<string, unknown>,
+    changes,
   };
 }