diff --git a/docs/.generated/plugin-sdk-api-baseline.sha256 b/docs/.generated/plugin-sdk-api-baseline.sha256
index 8b63c485e385..3b8a28b41f85 100644
--- a/docs/.generated/plugin-sdk-api-baseline.sha256
+++ b/docs/.generated/plugin-sdk-api-baseline.sha256
@@ -1,2 +1,2 @@
-4d48d01820bdf49966c3a6bdc69da909779d81db7214ed5b54651a8cd544a24c  plugin-sdk-api-baseline.json
-72bad044a66391e838dcbdab5ef6897a40a7026d53c86d7130a55d53d37b15f2  plugin-sdk-api-baseline.jsonl
+8f362012108b8b2db08e836883fac095f88e70a4c1ef66a713980e1361ec48b6  plugin-sdk-api-baseline.json
+ddbb02207930b419658209039696e8008d76c8f839d7ecde95e1c8ba91c19c7a  plugin-sdk-api-baseline.jsonl
diff --git a/extensions/discord/src/doctor-contract.ts b/extensions/discord/src/doctor-contract.ts
index fbe71e650e43..7c4c7e2ecc67 100644
--- a/extensions/discord/src/doctor-contract.ts
+++ b/extensions/discord/src/doctor-contract.ts
@@ -8,20 +8,46 @@ import {
   isSupportedRealtimeVoiceActivationName,
   normalizeRealtimeVoiceActivationNamePrefix,
 } from "openclaw/plugin-sdk/realtime-voice";
-import {
-  asObjectRecord,
-  hasLegacyAccountStreamingAliases,
-  hasLegacyStreamingAliases,
-  normalizeLegacyChannelAliases,
-  resolveLegacyAliasStreamingMode,
-} from "openclaw/plugin-sdk/runtime-doctor";
+import { asObjectRecord, defineChannelAliasMigration } from "openclaw/plugin-sdk/runtime-doctor";
 
 const LEGACY_TTS_PROVIDER_KEYS = ["openai", "elevenlabs", "microsoft", "edge"] as const;
 type AgentBindingConfig = NonNullable<OpenClawConfig["bindings"]>[number];
 
-function hasLegacyDiscordStreamingAliases(value: unknown): boolean {
-  return hasLegacyStreamingAliases(value, { includePreviewChunk: true });
-}
+const streamingAliasMigration = defineChannelAliasMigration({
+  channelId: "discord",
+  streaming: {
+    // Runtime mode resolution dropped legacy streamMode reads; the doctor
+    // resolver keeps them so migration preserves configured intent.
+    defaultMode: "off",
+    // Discord previews default to progress only while `streaming` is absent;
+    // any present object (even without mode) resolves off, so migration pins
+    // progress when delivery-only aliases create the object with no root
+    // streaming object to inherit from.
+    absentObjectDefault: "progress",
+    includePreviewChunk: true,
+  },
+  // Discord's account merge replaces the root streaming object wholesale
+  // (`streaming` not in mergeDiscordAccountConfig nestedObjectKeys), so doctor
+  // must seed materialized account objects with the inherited root settings.
+  accountStreamingReplacesRoot: true,
+  dm: { root: true, accounts: true },
+  normalizeAccountExtra: ({ account, pathPrefix, changes }) => {
+    const accountVoice = asObjectRecord(account.voice);
+    if (
+      !accountVoice ||
+      !migrateLegacyTtsConfig(asObjectRecord(accountVoice.tts), `${pathPrefix}.voice.tts`, changes)
+    ) {
+      return { entry: account, changed: false };
+    }
+    return {
+      entry: {
+        ...account,
+        voice: accountVoice,
+      },
+      changed: true,
+    };
+  },
+});
 
 function hasLegacyTtsProviderKeys(value: unknown): boolean {
   const tts = asObjectRecord(value);
@@ -475,18 +501,7 @@ export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
       'channels.discord.accounts.<id>.voice.realtime.wakeNames entries longer than two words are unsupported; use one- or two-word activation names. Run "openclaw doctor --fix".',
     match: hasUnsupportedDiscordAccountRealtimeWakeNames,
   },
-  {
-    path: ["channels", "discord"],
-    message:
-      'channels.discord.streamMode, channels.discord.streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.discord.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
-    match: hasLegacyDiscordStreamingAliases,
-  },
-  {
-    path: ["channels", "discord", "accounts"],
-    message:
-      'channels.discord.accounts.<id>.streamMode, streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.discord.accounts.<id>.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
-    match: (value) => hasLegacyAccountStreamingAliases(value, hasLegacyDiscordStreamingAliases),
-  },
+  ...streamingAliasMigration.legacyConfigRules,
 ];
 
 export function normalizeCompatibilityConfig({
@@ -494,66 +509,18 @@ export function normalizeCompatibilityConfig({
 }: {
   cfg: OpenClawConfig;
 }): ChannelDoctorConfigMutation {
-  const rawEntry = asObjectRecord((cfg.channels as Record<string, unknown> | undefined)?.discord);
+  const changes: string[] = [];
+  const bindingsToAdd: AgentBindingConfig[] = [];
+
+  const aliases = streamingAliasMigration.normalizeChannelConfig({ cfg, changes });
+  const rawEntry = asObjectRecord(
+    (aliases.config.channels as Record<string, unknown> | undefined)?.discord,
+  );
   if (!rawEntry) {
     return { config: cfg, changes: [] };
   }
-
-  const changes: string[] = [];
-  let updated;
-  let changed;
-  const bindingsToAdd: AgentBindingConfig[] = [];
-
-  // Discord previews default to progress only while `streaming` is absent;
-  // any present object (even without `mode`) resolves off. Migration must pin
-  // the entry's previous effective mode when delivery-only aliases create the
-  // object, or doctor silently flips preview behavior.
-  const discordEffectiveMode = (entry: Record<string, unknown>) =>
-    entry.streaming === undefined && entry.streamMode === undefined
-      ? "progress"
-      : resolveLegacyAliasStreamingMode(entry, "off");
-  const rootEffectiveMode = discordEffectiveMode(rawEntry);
-
-  const aliases = normalizeLegacyChannelAliases({
-    entry: rawEntry,
-    pathPrefix: "channels.discord",
-    changes,
-    normalizeDm: true,
-    normalizeAccountDm: true,
-    resolveStreamingOptions: (entry) => ({
-      // Runtime mode resolution dropped legacy streamMode reads; the doctor
-      // resolver keeps them so migration preserves configured intent.
-      resolvedMode: resolveLegacyAliasStreamingMode(entry, "off"),
-      // Accounts without their own mode source inherit the root's effective
-      // mode at runtime (account `streaming` objects replace the root object
-      // wholesale on merge), so pin that. The root only hits the alias-only
-      // branch when both mode sources are absent, where this is "progress".
-      aliasOnlyMode: rootEffectiveMode,
-      includePreviewChunk: true,
-    }),
-    normalizeAccountExtra: ({ account, pathPrefix }) => {
-      const accountVoice = asObjectRecord(account.voice);
-      if (
-        !accountVoice ||
-        !migrateLegacyTtsConfig(
-          asObjectRecord(accountVoice.tts),
-          `${pathPrefix}.voice.tts`,
-          changes,
-        )
-      ) {
-        return { entry: account, changed: false };
-      }
-      return {
-        entry: {
-          ...account,
-          voice: accountVoice,
-        },
-        changed: true,
-      };
-    },
-  });
-  updated = aliases.entry;
-  changed = aliases.changed;
+  let updated = rawEntry;
+  let changed = aliases.config !== cfg;
 
   const guildAliases = normalizeDiscordGuildChannelAllowAliases({
     entry: updated,
@@ -639,9 +606,9 @@ export function normalizeCompatibilityConfig({
   }
   return {
     config: {
-      ...cfg,
+      ...aliases.config,
       channels: {
-        ...cfg.channels,
+        ...aliases.config.channels,
         discord: updated,
       } as OpenClawConfig["channels"],
       bindings:
diff --git a/extensions/discord/src/doctor.test.ts b/extensions/discord/src/doctor.test.ts
index 4370387f6fc7..48e1a83d3d4b 100644
--- a/extensions/discord/src/doctor.test.ts
+++ b/extensions/discord/src/doctor.test.ts
@@ -108,16 +108,16 @@ describe("discord doctor", () => {
     ]);
   });
 
-  it("pins the inherited root mode when migrating account delivery aliases", () => {
+  it("seeds the inherited root streaming settings when migrating account delivery aliases", () => {
     const normalize = getDiscordCompatibilityNormalizer();
 
     // Account `streaming` objects replace the root object wholesale on merge,
-    // so the migrated account must carry the root mode it previously inherited.
+    // so the migrated account must carry the settings it previously inherited.
     const result = normalize({
       cfg: {
         channels: {
           discord: {
-            streaming: { mode: "off" },
+            streaming: { mode: "off", block: { coalesce: { idleMs: 5 } } },
             accounts: { work: { chunkMode: "newline" } },
           },
         },
@@ -125,14 +125,20 @@ describe("discord doctor", () => {
     });
 
     expect(result.config.channels?.discord).toEqual({
-      streaming: { mode: "off" },
+      streaming: { mode: "off", block: { coalesce: { idleMs: 5 } } },
       accounts: {
-        work: { streaming: { mode: "off", chunkMode: "newline" } },
+        work: {
+          streaming: {
+            mode: "off",
+            chunkMode: "newline",
+            block: { coalesce: { idleMs: 5 } },
+          },
+        },
       },
     });
     expect(result.changes).toEqual([
       "Moved channels.discord.accounts.work.chunkMode → channels.discord.accounts.work.streaming.chunkMode.",
-      "Set channels.discord.accounts.work.streaming.mode (off) to keep the previous default while migrating flat streaming keys.",
+      "Copied channels.discord.streaming into channels.discord.accounts.work.streaming to keep inherited settings while migrating flat streaming keys.",
     ]);
   });
 
diff --git a/extensions/imessage/doctor-contract-api.test.ts b/extensions/imessage/doctor-contract-api.test.ts
index bfb90e42b6b0..3a27af1a7dbd 100644
--- a/extensions/imessage/doctor-contract-api.test.ts
+++ b/extensions/imessage/doctor-contract-api.test.ts
@@ -54,7 +54,12 @@ describe("imessage normalizeCompatibilityConfig streaming aliases", () => {
       (imessage.accounts as Record<string, Record<string, unknown>>).personal,
       "personal iMessage account",
     );
-    expect(personal.streaming).toEqual({ block: { coalesce: { idleMs: 250 } } });
+    // iMessage deep-merges root+account streaming at runtime
+    // (mergeIMessageStreamingConfig), so migration keeps the account object
+    // account-local instead of seeding root values into it.
+    expect(personal.streaming).toEqual({
+      block: { coalesce: { idleMs: 250 } },
+    });
     expect(personal.blockStreamingCoalesce).toBeUndefined();
     for (const change of [
       "Moved channels.imessage.chunkMode → channels.imessage.streaming.chunkMode.",
diff --git a/extensions/imessage/doctor-contract-api.ts b/extensions/imessage/doctor-contract-api.ts
index 101d47f9d9dc..9e973578ea32 100644
--- a/extensions/imessage/doctor-contract-api.ts
+++ b/extensions/imessage/doctor-contract-api.ts
@@ -4,11 +4,7 @@ import type {
   ChannelDoctorLegacyConfigRule,
 } from "openclaw/plugin-sdk/channel-contract";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-contracts";
-import {
-  hasLegacyAccountStreamingAliases,
-  normalizeLegacyChannelAliases,
-  resolveLegacyAliasStreamingMode,
-} from "openclaw/plugin-sdk/runtime-doctor";
+import { defineChannelAliasMigration } from "openclaw/plugin-sdk/runtime-doctor";
 import { isRecord } from "openclaw/plugin-sdk/string-coerce-runtime";
 
 // Disabled `channels.imessage.catchup` blocks are retired. Enabled blocks stay
@@ -38,16 +34,10 @@ function imessageEntryHasRetiredCatchup(entry: unknown): boolean {
 
 // iMessage's nested streaming schema is delivery-only ({chunkMode, block}); it
 // has no preview mode, so only the delivery flat aliases are legal legacy input.
-function hasLegacyIMessageStreamingAliases(value: unknown): boolean {
-  if (!isRecord(value)) {
-    return false;
-  }
-  return (
-    value.chunkMode !== undefined ||
-    value.blockStreaming !== undefined ||
-    value.blockStreamingCoalesce !== undefined
-  );
-}
+const streamingAliasMigration = defineChannelAliasMigration({
+  channelId: "imessage",
+  streaming: { defaultMode: "partial", deliveryOnly: true },
+});
 
 export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
   {
@@ -57,18 +47,7 @@ export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
       'Run "openclaw doctor --fix" to remove disabled catchup blocks.',
     match: (value) => imessageEntryHasRetiredCatchup(value),
   },
-  {
-    path: ["channels", "imessage"],
-    message:
-      'channels.imessage.chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.imessage.streaming.{chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
-    match: hasLegacyIMessageStreamingAliases,
-  },
-  {
-    path: ["channels", "imessage", "accounts"],
-    message:
-      'channels.imessage.accounts.<id>.chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.imessage.accounts.<id>.streaming.{chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
-    match: (value) => hasLegacyAccountStreamingAliases(value, hasLegacyIMessageStreamingAliases),
-  },
+  ...streamingAliasMigration.legacyConfigRules,
 ];
 
 export function normalizeCompatibilityConfig({
@@ -111,32 +90,15 @@ export function normalizeCompatibilityConfig({
     }
   }
 
-  // Only run the shared alias migration when the delivery flat aliases exist;
-  // iMessage has no streaming mode, so scalar `streaming` values are plain
-  // validation errors rather than migratable legacy shapes.
-  const hasStreamingAliases =
-    hasLegacyIMessageStreamingAliases(nextImessage) ||
-    hasLegacyAccountStreamingAliases(nextImessage.accounts, hasLegacyIMessageStreamingAliases);
-  if (hasStreamingAliases) {
-    const aliases = normalizeLegacyChannelAliases({
-      entry: nextImessage,
-      pathPrefix: "channels.imessage",
-      changes,
-      resolveStreamingOptions: (entry) => ({
-        resolvedMode: resolveLegacyAliasStreamingMode(entry, "partial"),
-      }),
-    });
-    nextImessage = aliases.entry;
-  }
-
+  const aliases = streamingAliasMigration.normalizeChannelConfig({
+    cfg:
+      nextImessage === imessage
+        ? cfg
+        : ({ ...cfg, channels: { ...channels, imessage: nextImessage } } as OpenClawConfig),
+    changes,
+  });
   if (changes.length === 0) {
     return { config: cfg, changes: [] };
   }
-  return {
-    config: {
-      ...cfg,
-      channels: { ...channels, imessage: nextImessage },
-    } as OpenClawConfig,
-    changes,
-  };
+  return { config: aliases.config, changes };
 }
diff --git a/extensions/msteams/doctor-contract-api.ts b/extensions/msteams/doctor-contract-api.ts
index 6cdda08305b9..d339e5b994c5 100644
--- a/extensions/msteams/doctor-contract-api.ts
+++ b/extensions/msteams/doctor-contract-api.ts
@@ -10,9 +10,7 @@ import type {
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-contracts";
 import {
   archiveLegacyStateSource,
-  hasLegacyStreamingAliases,
-  normalizeLegacyChannelAliases,
-  resolveLegacyAliasStreamingMode,
+  defineChannelAliasMigration,
   type PluginDoctorStateMigration,
 } from "openclaw/plugin-sdk/runtime-doctor";
 import { resolveStorePath } from "openclaw/plugin-sdk/session-store-runtime";
@@ -55,46 +53,22 @@ import {
   type MSTeamsSsoStoredToken,
 } from "./src/sso-token-store.js";
 
-export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
-  {
-    path: ["channels", "msteams"],
-    message:
-      'channels.msteams.streamMode, channels.msteams.streaming (scalar), chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.msteams.streaming.{mode,chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
-    match: (value) => hasLegacyStreamingAliases(value),
-  },
-];
+const streamingAliasMigration = defineChannelAliasMigration({
+  channelId: "msteams",
+  // Teams previews default to partial streaming, matching the runtime default
+  // in reply-dispatcher when no mode is configured.
+  streaming: { defaultMode: "partial" },
+});
+
+export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] =
+  streamingAliasMigration.legacyConfigRules;
 
 export function normalizeCompatibilityConfig({
   cfg,
 }: {
   cfg: OpenClawConfig;
 }): ChannelDoctorConfigMutation {
-  const channels = cfg.channels as Record<string, unknown> | undefined;
-  const msteams = channels?.msteams;
-  if (!isRecord(msteams)) {
-    return { config: cfg, changes: [] };
-  }
-  const changes: string[] = [];
-  const aliases = normalizeLegacyChannelAliases({
-    entry: msteams,
-    pathPrefix: "channels.msteams",
-    changes,
-    resolveStreamingOptions: (entry) => ({
-      // Teams previews default to partial streaming, matching the runtime
-      // default in reply-dispatcher when no mode is configured.
-      resolvedMode: resolveLegacyAliasStreamingMode(entry, "partial"),
-    }),
-  });
-  if (!aliases.changed) {
-    return { config: cfg, changes: [] };
-  }
-  return {
-    config: {
-      ...cfg,
-      channels: { ...channels, msteams: aliases.entry },
-    } as OpenClawConfig,
-    changes,
-  };
+  return streamingAliasMigration.normalizeChannelConfig({ cfg });
 }
 
 type FeedbackLearningEntry = {
diff --git a/extensions/slack/src/doctor-contract.ts b/extensions/slack/src/doctor-contract.ts
index bf6398f05a1b..627fc5b41b52 100644
--- a/extensions/slack/src/doctor-contract.ts
+++ b/extensions/slack/src/doctor-contract.ts
@@ -4,17 +4,20 @@ import type {
   ChannelDoctorLegacyConfigRule,
 } from "openclaw/plugin-sdk/channel-contract";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-contracts";
-import {
-  asObjectRecord,
-  hasLegacyAccountStreamingAliases,
-  hasLegacyStreamingAliases,
-  normalizeLegacyChannelAliases,
-} from "openclaw/plugin-sdk/runtime-doctor";
+import { asObjectRecord, defineChannelAliasMigration } from "openclaw/plugin-sdk/runtime-doctor";
 import { resolveSlackNativeStreaming, resolveSlackStreamingMode } from "./streaming-compat.js";
 
-function hasLegacySlackStreamingAliases(value: unknown): boolean {
-  return hasLegacyStreamingAliases(value, { includeNativeTransport: true });
-}
+const streamingAliasMigration = defineChannelAliasMigration({
+  channelId: "slack",
+  streaming: {
+    // Slack maps its legacy draft stream modes (replace/status_final/append)
+    // through its own resolver instead of the generic mode parser.
+    defaultMode: "partial",
+    resolveMode: resolveSlackStreamingMode,
+    resolveNativeTransport: resolveSlackNativeStreaming,
+  },
+  dm: { root: true, accounts: true },
+});
 
 function hasLegacySlackChannelAllowAlias(value: unknown): boolean {
   const channels = asObjectRecord(asObjectRecord(value)?.channels);
@@ -57,18 +60,7 @@ function normalizeSlackChannelAllowAliases(params: {
 }
 
 export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
-  {
-    path: ["channels", "slack"],
-    message:
-      "channels.slack.streamMode, channels.slack.streaming (scalar), chunkMode, blockStreaming, blockStreamingCoalesce, and nativeStreaming are legacy; use channels.slack.streaming.{mode,chunkMode,block.enabled,block.coalesce,nativeTransport}.",
-    match: hasLegacySlackStreamingAliases,
-  },
-  {
-    path: ["channels", "slack", "accounts"],
-    message:
-      "channels.slack.accounts.<id>.streamMode, streaming (scalar), chunkMode, blockStreaming, blockStreamingCoalesce, and nativeStreaming are legacy; use channels.slack.accounts.<id>.streaming.{mode,chunkMode,block.enabled,block.coalesce,nativeTransport}.",
-    match: (value) => hasLegacyAccountStreamingAliases(value, hasLegacySlackStreamingAliases),
-  },
+  ...streamingAliasMigration.legacyConfigRules,
   {
     path: ["channels", "slack"],
     message:
@@ -94,28 +86,16 @@ export function normalizeCompatibilityConfig({
 }: {
   cfg: OpenClawConfig;
 }): ChannelDoctorConfigMutation {
-  const rawEntry = asObjectRecord((cfg.channels as Record<string, unknown> | undefined)?.slack);
+  const changes: string[] = [];
+  const aliases = streamingAliasMigration.normalizeChannelConfig({ cfg, changes });
+  const rawEntry = asObjectRecord(
+    (aliases.config.channels as Record<string, unknown> | undefined)?.slack,
+  );
   if (!rawEntry) {
     return { config: cfg, changes: [] };
   }
-
-  const changes: string[] = [];
-  let updated;
-  let changed;
-
-  const aliases = normalizeLegacyChannelAliases({
-    entry: rawEntry,
-    pathPrefix: "channels.slack",
-    changes,
-    normalizeDm: true,
-    normalizeAccountDm: true,
-    resolveStreamingOptions: (entry) => ({
-      resolvedMode: resolveSlackStreamingMode(entry),
-      resolvedNativeTransport: resolveSlackNativeStreaming(entry),
-    }),
-  });
-  updated = aliases.entry;
-  changed = aliases.changed;
+  let updated = rawEntry;
+  let changed = aliases.config !== cfg;
 
   const channels = asObjectRecord(updated.channels);
   if (channels) {
@@ -162,9 +142,9 @@ export function normalizeCompatibilityConfig({
   }
   return {
     config: {
-      ...cfg,
+      ...aliases.config,
       channels: {
-        ...cfg.channels,
+        ...aliases.config.channels,
         slack: updated as unknown as NonNullable<OpenClawConfig["channels"]>["slack"],
       } as OpenClawConfig["channels"],
     },
diff --git a/extensions/telegram/src/doctor-contract.ts b/extensions/telegram/src/doctor-contract.ts
index 99dec52e5ca0..7d75be81efb9 100644
--- a/extensions/telegram/src/doctor-contract.ts
+++ b/extensions/telegram/src/doctor-contract.ts
@@ -5,17 +5,14 @@ import type {
 } from "openclaw/plugin-sdk/channel-contract";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-contracts";
 import { DEFAULT_GROUP_HISTORY_LIMIT } from "openclaw/plugin-sdk/reply-history";
-import {
-  asObjectRecord,
-  hasLegacyAccountStreamingAliases,
-  hasLegacyStreamingAliases,
-  normalizeLegacyChannelAliases,
-  resolveLegacyAliasStreamingMode,
-} from "openclaw/plugin-sdk/runtime-doctor";
+import { asObjectRecord, defineChannelAliasMigration } from "openclaw/plugin-sdk/runtime-doctor";
 
-function hasLegacyTelegramStreamingAliases(value: unknown): boolean {
-  return hasLegacyStreamingAliases(value, { includePreviewChunk: true });
-}
+const streamingAliasMigration = defineChannelAliasMigration({
+  channelId: "telegram",
+  // Runtime mode resolution dropped legacy streamMode reads; the doctor
+  // resolver keeps them so migration preserves configured intent.
+  streaming: { defaultMode: "partial", includePreviewChunk: true },
+});
 
 function hasRetiredTelegramDmConfig(value: unknown): boolean {
   const entry = asObjectRecord(value);
@@ -241,18 +238,7 @@ export const legacyConfigRules: ChannelDoctorLegacyConfigRule[] = [
       'channels.telegram.accounts.<id>.includeGroupHistoryContext was removed; Telegram group history is always on for groups and bounded by historyLimit. Run "openclaw doctor --fix".',
     match: hasRetiredTelegramAccountGroupHistoryContextConfig,
   },
-  {
-    path: ["channels", "telegram"],
-    message:
-      "channels.telegram.streamMode, channels.telegram.streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.telegram.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}.",
-    match: hasLegacyTelegramStreamingAliases,
-  },
-  {
-    path: ["channels", "telegram", "accounts"],
-    message:
-      "channels.telegram.accounts.<id>.streamMode, streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.telegram.accounts.<id>.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}.",
-    match: (value) => hasLegacyAccountStreamingAliases(value, hasLegacyTelegramStreamingAliases),
-  },
+  ...streamingAliasMigration.legacyConfigRules,
 ];
 
 export function normalizeCompatibilityConfig({
@@ -260,14 +246,17 @@ export function normalizeCompatibilityConfig({
 }: {
   cfg: OpenClawConfig;
 }): ChannelDoctorConfigMutation {
-  const rawEntry = asObjectRecord((cfg.channels as Record<string, unknown> | undefined)?.telegram);
+  const changes: string[] = [];
+  const aliases = streamingAliasMigration.normalizeChannelConfig({ cfg, changes });
+  const rawEntry = asObjectRecord(
+    (aliases.config.channels as Record<string, unknown> | undefined)?.telegram,
+  );
   if (!rawEntry) {
     return { config: cfg, changes: [] };
   }
 
-  const changes: string[] = [];
   let updated = rawEntry;
-  let changed = false;
+  let changed = aliases.config !== cfg;
   const rootGroupHistoryContextMode = updated.includeGroupHistoryContext;
   const rootGroupHistoryLimitBeforeMigration =
     typeof updated.historyLimit === "number"
@@ -324,20 +313,6 @@ export function normalizeCompatibilityConfig({
     }
   }
 
-  const aliases = normalizeLegacyChannelAliases({
-    entry: updated,
-    pathPrefix: "channels.telegram",
-    changes,
-    resolveStreamingOptions: (entry) => ({
-      includePreviewChunk: true,
-      // Runtime mode resolution dropped legacy streamMode reads; the doctor
-      // resolver keeps them so migration preserves configured intent.
-      resolvedMode: resolveLegacyAliasStreamingMode(entry, "partial"),
-    }),
-  });
-  updated = aliases.entry;
-  changed = changed || aliases.changed;
-
   const accounts = asObjectRecord(updated.accounts);
   if (accounts) {
     let accountsChanged = false;
@@ -389,9 +364,9 @@ export function normalizeCompatibilityConfig({
   }
   return {
     config: {
-      ...cfg,
+      ...aliases.config,
       channels: {
-        ...cfg.channels,
+        ...aliases.config.channels,
         telegram: updated as unknown as NonNullable<OpenClawConfig["channels"]>["telegram"],
       } as OpenClawConfig["channels"],
     },
diff --git a/scripts/plugin-sdk-surface-report.mjs b/scripts/plugin-sdk-surface-report.mjs
index f0e48d0068e7..9f3340062f89 100644
--- a/scripts/plugin-sdk-surface-report.mjs
+++ b/scripts/plugin-sdk-surface-report.mjs
@@ -199,12 +199,12 @@ export function readPluginSdkSurfaceBudgets(env = process.env) {
     ),
     publicExports: readPluginSdkSurfaceBudgetEnv(
       "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_EXPORTS",
-      10636,
+      10639,
       env,
     ),
     publicFunctionExports: readPluginSdkSurfaceBudgetEnv(
       "OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_FUNCTION_EXPORTS",
-      5354,
+      5355,
       env,
     ),
     publicDeprecatedExports: readPluginSdkSurfaceBudgetEnv(
diff --git a/src/commands/doctor-legacy-config.test.ts b/src/commands/doctor-legacy-config.test.ts
index fc08f00e037e..fbf0a7d6c4ae 100644
--- a/src/commands/doctor-legacy-config.test.ts
+++ b/src/commands/doctor-legacy-config.test.ts
@@ -1,6 +1,10 @@
 // Doctor legacy-config tests cover compatibility normalizers for old channel, browser, and config shapes.
 import { describe, expect, it } from "vitest";
-import { normalizeLegacyStreamingAliases } from "../config/channel-compat-normalization.js";
+import {
+  normalizeLegacyChannelAliases,
+  normalizeLegacyStreamingAliases,
+  resolveLegacyAliasStreamingMode,
+} from "../config/channel-compat-normalization.js";
 import type { OpenClawConfig } from "../config/config.js";
 import { normalizeLegacyBrowserConfig } from "./doctor/shared/legacy-config-core-normalizers.js";
 
@@ -21,7 +25,6 @@ function normalizeStreaming(params: {
   resolvedMode: string;
   aliasOnlyMode?: string;
   resolvedNativeTransport?: unknown;
-  offModeLegacyNotice?: (pathPrefix: string) => string;
 }) {
   const changes: string[] = [];
   const result = normalizeLegacyStreamingAliases({
@@ -80,15 +83,12 @@ describe("normalizeCompatibilityConfigValues preview streaming aliases", () => {
       entry: { streamMode: "off" },
       pathPrefix: "channels.discord",
       resolvedMode: "off",
-      offModeLegacyNotice: (pathPrefix) =>
-        `${pathPrefix}.streaming remains off by default to avoid Discord preview-edit rate limits; set ${pathPrefix}.streaming.mode="partial" to opt in explicitly.`,
     });
 
     expect(res.entry.streaming).toEqual({ mode: "off" });
     expect(getLegacyProperty(res.entry, "streamMode")).toBeUndefined();
     expect(res.changes).toEqual([
       "Moved channels.discord.streamMode → channels.discord.streaming.mode (off).",
-      'channels.discord.streaming remains off by default to avoid Discord preview-edit rate limits; set channels.discord.streaming.mode="partial" to opt in explicitly.',
     ]);
   });
 
@@ -173,6 +173,133 @@ describe("normalizeCompatibilityConfigValues preview streaming aliases", () => {
   });
 });
 
+describe("normalizeLegacyChannelAliases account inheritance seeding", () => {
+  // Discord-shaped options: object-without-mode default "off", absent default
+  // "progress", account merge replaces the root streaming object wholesale.
+  function normalizeChannel(
+    entry: Record<string, unknown>,
+    options?: { seedAccountStreamingFromRoot?: boolean },
+  ) {
+    const changes: string[] = [];
+    const result = normalizeLegacyChannelAliases({
+      entry,
+      pathPrefix: "channels.discord",
+      changes,
+      seedAccountStreamingFromRoot: options?.seedAccountStreamingFromRoot ?? true,
+      resolveStreamingOptions: (value) => ({
+        resolvedMode: resolveLegacyAliasStreamingMode(value, "off"),
+        aliasOnlyMode: "progress",
+        includePreviewChunk: true,
+      }),
+    });
+    return { entry: result.entry, changes };
+  }
+
+  function workStreaming(entry: Record<string, unknown>): unknown {
+    return (entry.accounts as { work: Record<string, unknown> }).work.streaming;
+  }
+
+  it("pins the absent-object default when no root streaming object exists", () => {
+    // Truth table row 1: root absent → account previously resolved the
+    // channel's streaming-absent default, so migration pins it explicitly.
+    const res = normalizeChannel({
+      accounts: { work: { blockStreaming: true } },
+    });
+
+    expect(workStreaming(res.entry)).toEqual({
+      mode: "progress",
+      block: { enabled: true },
+    });
+    expect(res.changes).toEqual([
+      "Moved channels.discord.accounts.work.blockStreaming → channels.discord.accounts.work.streaming.block.enabled.",
+      "Set channels.discord.accounts.work.streaming.mode (progress) to keep the previous default while migrating flat streaming keys.",
+    ]);
+  });
+
+  it("seeds the root object's mode and subfields when the root has a mode", () => {
+    // Truth table row 2: account previously inherited the root object wholesale,
+    // so the created account object copies mode plus subfields; no pin needed.
+    const res = normalizeChannel({
+      streaming: { mode: "block", block: { coalesce: { idleMs: 5 } } },
+      accounts: { work: { chunkMode: "newline" } },
+    });
+
+    expect(workStreaming(res.entry)).toEqual({
+      mode: "block",
+      chunkMode: "newline",
+      block: { coalesce: { idleMs: 5 } },
+    });
+    expect(res.entry.streaming).toEqual({ mode: "block", block: { coalesce: { idleMs: 5 } } });
+    expect(res.changes).toEqual([
+      "Moved channels.discord.accounts.work.chunkMode → channels.discord.accounts.work.streaming.chunkMode.",
+      "Copied channels.discord.streaming into channels.discord.accounts.work.streaming to keep inherited settings while migrating flat streaming keys.",
+    ]);
+  });
+
+  it("seeds subfields without pinning a mode when the root object has no mode", () => {
+    // Truth table row 3: the account previously resolved the root object's
+    // object-without-mode default; pinning absentObjectDefault would change it.
+    const res = normalizeChannel({
+      streaming: { chunkMode: "word" },
+      accounts: { work: { blockStreaming: true } },
+    });
+
+    const streaming = workStreaming(res.entry) as Record<string, unknown>;
+    expect(streaming).toEqual({
+      chunkMode: "word",
+      block: { enabled: true },
+    });
+    expect(streaming.mode).toBeUndefined();
+    expect(res.changes).toEqual([
+      "Moved channels.discord.accounts.work.blockStreaming → channels.discord.accounts.work.streaming.block.enabled.",
+      "Copied channels.discord.streaming into channels.discord.accounts.work.streaming to keep inherited settings while migrating flat streaming keys.",
+    ]);
+  });
+
+  it("keeps account values over seeded root values on conflict", () => {
+    const res = normalizeChannel({
+      streaming: { mode: "block", chunkMode: "word" },
+      accounts: { work: { streamMode: "partial", chunkMode: "newline" } },
+    });
+
+    expect(workStreaming(res.entry)).toEqual({
+      mode: "partial",
+      chunkMode: "newline",
+    });
+  });
+
+  it("does not seed accounts whose streaming key already existed", () => {
+    const res = normalizeChannel({
+      streaming: { mode: "block", chunkMode: "word" },
+      accounts: { work: { streaming: false } },
+    });
+
+    expect(workStreaming(res.entry)).toEqual({
+      mode: "off",
+    });
+    expect(res.changes).toEqual([
+      "Moved channels.discord.accounts.work.streaming (boolean) → channels.discord.accounts.work.streaming.mode (off).",
+    ]);
+  });
+
+  it("does not seed for deep-merge channels so runtime inheritance keeps composing", () => {
+    // Slack/iMessage deep-merge root+account streaming at runtime; copying root
+    // values into the account config would freeze inheritance at fix time.
+    const res = normalizeChannel(
+      {
+        streaming: { mode: "block", block: { coalesce: { idleMs: 5 } } },
+        accounts: { work: { chunkMode: "newline" } },
+      },
+      { seedAccountStreamingFromRoot: false },
+    );
+
+    expect(workStreaming(res.entry)).toEqual({ chunkMode: "newline" });
+    expect(res.changes).toEqual([
+      "Moved channels.discord.accounts.work.chunkMode → channels.discord.accounts.work.streaming.chunkMode.",
+    ]);
+  });
+});
+
 describe("normalizeCompatibilityConfigValues browser compatibility aliases", () => {
   it("removes legacy browser relay bind host and stale extension relay cdpUrl", () => {
     const changes: string[] = [];
diff --git a/src/config/channel-alias-migration.test.ts b/src/config/channel-alias-migration.test.ts
new file mode 100644
index 000000000000..a5008d538ccd
--- /dev/null
+++ b/src/config/channel-alias-migration.test.ts
@@ -0,0 +1,198 @@
+// Tests for the declarative channel doctor alias-migration DSL.
+import { describe, expect, it } from "vitest";
+import { defineChannelAliasMigration } from "./channel-alias-migration.js";
+import type { OpenClawConfig } from "./types.openclaw.js";
+
+function cfgWith(channelId: string, entry: Record<string, unknown>): OpenClawConfig {
+  return { channels: { [channelId]: entry } } as never;
+}
+
+describe("defineChannelAliasMigration message generation", () => {
+  it("generates preview-chunk channel messages (discord shape)", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "discord",
+      streaming: { defaultMode: "off", absentObjectDefault: "progress", includePreviewChunk: true },
+    });
+
+    expect(migration.legacyConfigRules.map((rule) => rule.message)).toEqual([
+      'channels.discord.streamMode, channels.discord.streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.discord.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
+      'channels.discord.accounts.<id>.streamMode, streaming (scalar), chunkMode, blockStreaming, draftChunk, and blockStreamingCoalesce are legacy; use channels.discord.accounts.<id>.streaming.{mode,chunkMode,preview.chunk,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
+    ]);
+    expect(migration.legacyConfigRules.map((rule) => rule.path)).toEqual([
+      ["channels", "discord"],
+      ["channels", "discord", "accounts"],
+    ]);
+  });
+
+  it("generates native-transport channel messages (slack shape)", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "slack",
+      streaming: { defaultMode: "partial", resolveNativeTransport: () => true },
+    });
+
+    expect(migration.legacyConfigRules.map((rule) => rule.message)).toEqual([
+      'channels.slack.streamMode, channels.slack.streaming (scalar), chunkMode, blockStreaming, blockStreamingCoalesce, and nativeStreaming are legacy; use channels.slack.streaming.{mode,chunkMode,block.enabled,block.coalesce,nativeTransport}. Run "openclaw doctor --fix".',
+      'channels.slack.accounts.<id>.streamMode, streaming (scalar), chunkMode, blockStreaming, blockStreamingCoalesce, and nativeStreaming are legacy; use channels.slack.accounts.<id>.streaming.{mode,chunkMode,block.enabled,block.coalesce,nativeTransport}. Run "openclaw doctor --fix".',
+    ]);
+  });
+
+  it("generates delivery-only channel messages (imessage shape)", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "imessage",
+      streaming: { defaultMode: "partial", deliveryOnly: true },
+    });
+
+    expect(migration.legacyConfigRules.map((rule) => rule.message)).toEqual([
+      'channels.imessage.chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.imessage.streaming.{chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
+      'channels.imessage.accounts.<id>.chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.imessage.accounts.<id>.streaming.{chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
+    ]);
+  });
+
+  it("generates plain mode channel messages (msteams shape)", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "msteams",
+      streaming: { defaultMode: "partial" },
+    });
+
+    expect(migration.legacyConfigRules[0]?.message).toBe(
+      'channels.msteams.streamMode, channels.msteams.streaming (scalar), chunkMode, blockStreaming, and blockStreamingCoalesce are legacy; use channels.msteams.streaming.{mode,chunkMode,block.enabled,block.coalesce}. Run "openclaw doctor --fix".',
+    );
+  });
+});
+
+describe("defineChannelAliasMigration rule matching", () => {
+  it("matches root and account entries per spec options", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "discord",
+      streaming: { defaultMode: "off", includePreviewChunk: true },
+    });
+    const [rootRule, accountsRule] = migration.legacyConfigRules;
+
+    expect(rootRule?.match?.({ streamMode: "block" }, {})).toBe(true);
+    expect(rootRule?.match?.({ streaming: false }, {})).toBe(true);
+    expect(rootRule?.match?.({ draftChunk: { minChars: 5 } }, {})).toBe(true);
+    expect(rootRule?.match?.({ nativeStreaming: false }, {})).toBe(false);
+    expect(rootRule?.match?.({ streaming: { mode: "off" } }, {})).toBe(false);
+    expect(accountsRule?.match?.({ work: { blockStreaming: true } }, {})).toBe(true);
+    expect(accountsRule?.match?.({ work: { streaming: { mode: "off" } } }, {})).toBe(false);
+  });
+
+  it("matches nativeStreaming only for native-transport channels", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "slack",
+      streaming: { defaultMode: "partial", resolveNativeTransport: () => true },
+    });
+
+    expect(migration.hasLegacyAliases({ nativeStreaming: false })).toBe(true);
+    expect(migration.hasLegacyAliases({ draftChunk: {} })).toBe(false);
+  });
+
+  it("excludes mode sources for delivery-only channels", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "imessage",
+      streaming: { defaultMode: "partial", deliveryOnly: true },
+    });
+
+    expect(migration.hasLegacyAliases({ chunkMode: "newline" })).toBe(true);
+    expect(migration.hasLegacyAliases({ streamMode: "block" })).toBe(false);
+    expect(migration.hasLegacyAliases({ streaming: "partial" })).toBe(false);
+    expect(migration.hasLegacyAliases({ streaming: false })).toBe(false);
+  });
+});
+
+describe("defineChannelAliasMigration normalizeChannelConfig", () => {
+  it("migrates root and account aliases with dm normalization", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "discord",
+      streaming: { defaultMode: "off", absentObjectDefault: "progress", includePreviewChunk: true },
+      accountStreamingReplacesRoot: true,
+      dm: { root: true, accounts: true },
+    });
+
+    const changes: string[] = [];
+    const result = migration.normalizeChannelConfig({
+      cfg: cfgWith("discord", {
+        streamMode: "block",
+        dm: { policy: "open" },
+        accounts: { work: { draftChunk: { minChars: 9 } } },
+      }),
+      changes,
+    });
+
+    expect(result.changes).toBe(changes);
+    expect((result.config.channels as Record<string, unknown>).discord).toEqual({
+      dmPolicy: "open",
+      streaming: { mode: "block" },
+      accounts: {
+        work: {
+          streaming: { mode: "block", preview: { chunk: { minChars: 9 } } },
+        },
+      },
+    });
+    expect(changes).toEqual([
+      "Moved channels.discord.dm.policy → channels.discord.dmPolicy.",
+      "Removed empty channels.discord.dm after migration.",
+      "Moved channels.discord.streamMode → channels.discord.streaming.mode (block).",
+      "Moved channels.discord.accounts.work.draftChunk → channels.discord.accounts.work.streaming.preview.chunk.",
+      "Copied channels.discord.streaming into channels.discord.accounts.work.streaming to keep inherited settings while migrating flat streaming keys.",
+    ]);
+  });
+
+  it("routes the escape hatch into per-account migration", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "discord",
+      streaming: { defaultMode: "off" },
+      normalizeAccountExtra: ({ account, pathPrefix, changes }) => {
+        if (account.legacyFlag === undefined) {
+          return { entry: account, changed: false };
+        }
+        const { legacyFlag: _ignored, ...rest } = account;
+        changes.push(`Removed ${pathPrefix}.legacyFlag.`);
+        return { entry: rest, changed: true };
+      },
+    });
+
+    const result = migration.normalizeChannelConfig({
+      cfg: cfgWith("discord", { accounts: { work: { legacyFlag: true } } }),
+    });
+
+    expect(result.changes).toEqual(["Removed channels.discord.accounts.work.legacyFlag."]);
+    expect((result.config.channels as Record<string, unknown>).discord).toEqual({
+      accounts: { work: {} },
+    });
+  });
+
+  it("returns the unchanged sentinel when nothing matches", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "msteams",
+      streaming: { defaultMode: "partial" },
+    });
+
+    const modern = cfgWith("msteams", { streaming: { mode: "partial" } });
+    const untouched = migration.normalizeChannelConfig({ cfg: modern });
+    expect(untouched.config).toBe(modern);
+    expect(untouched.changes).toEqual([]);
+
+    const missing = { channels: {} } as never;
+    expect(migration.normalizeChannelConfig({ cfg: missing }).config).toBe(missing);
+  });
+
+  it("skips scalar streaming values entirely for delivery-only channels", () => {
+    const migration = defineChannelAliasMigration({
+      channelId: "imessage",
+      streaming: { defaultMode: "partial", deliveryOnly: true },
+    });
+
+    // Scalar `streaming` is a validation error for delivery-only channels, not
+    // a migratable legacy shape, so the migration must not touch it.
+    const scalarOnly = cfgWith("imessage", { streaming: "partial" });
+    expect(migration.normalizeChannelConfig({ cfg: scalarOnly }).config).toBe(scalarOnly);
+
+    const result = migration.normalizeChannelConfig({
+      cfg: cfgWith("imessage", { accounts: { work: { chunkMode: "newline" } } }),
+    });
+    expect(result.changes).toEqual([
+      "Moved channels.imessage.accounts.work.chunkMode → channels.imessage.accounts.work.streaming.chunkMode.",
+    ]);
+  });
+});
diff --git a/src/config/channel-alias-migration.ts b/src/config/channel-alias-migration.ts
new file mode 100644
index 000000000000..292a5195ee43
--- /dev/null
+++ b/src/config/channel-alias-migration.ts
@@ -0,0 +1,196 @@
+// Declarative front for channel doctor streaming/dm alias migrations.
+import {
+  asObjectRecord,
+  hasLegacyAccountStreamingAliases,
+  hasLegacyStreamingAliases,
+  normalizeLegacyChannelAliases,
+  resolveLegacyAliasStreamingMode,
+  type CompatMutationResult,
+  type LegacyStreamingAliasOptions,
+  type NormalizeLegacyChannelAccountParams,
+} from "./channel-compat-normalization.js";
+import type { LegacyConfigRule } from "./legacy.shared.js";
+import type { OpenClawConfig } from "./types.openclaw.js";
+
+export type StreamingAliasMode = "off" | "partial" | "block" | "progress";
+
+/** Streaming half of a channel alias-migration spec. */
+type StreamingAliasSpec = {
+  /** Default passed to resolveLegacyAliasStreamingMode for mode-source migration. */
+  defaultMode: StreamingAliasMode;
+  /** Channel-specific mode resolver override (Slack maps legacy draft stream modes). */
+  resolveMode?: (entry: Record<string, unknown>) => StreamingAliasMode;
+  /**
+   * The channel's runtime default when `streaming` is entirely absent, if it
+   * differs from the object-without-mode default (Discord: progress vs off).
+   * Pinned when delivery-only aliases materialize the object and no root
+   * streaming object exists to seed inherited settings from.
+   */
+  absentObjectDefault?: StreamingAliasMode;
+  /** Channel accepts flat `draftChunk` (Discord, Telegram). */
+  includePreviewChunk?: boolean;
+  /** Channel accepts flat `nativeStreaming`; returns the resolved nativeTransport (Slack). */
+  resolveNativeTransport?: (entry: Record<string, unknown>) => unknown;
+  /**
+   * Channel has no streaming mode: only delivery flat aliases migrate, and
+   * scalar `streaming` values are plain validation errors (iMessage). The
+   * detection matcher excludes streamMode/scalar streaming, and the migration
+   * only runs when a delivery flat alias exists somewhere in the entry.
+   */
+  deliveryOnly?: boolean;
+};
+
+export type ChannelAliasMigrationSpec = {
+  /** Channel id under `channels.<id>`; also the doctor message path prefix. */
+  channelId: string;
+  streaming: StreamingAliasSpec;
+  /**
+   * Set when the channel's runtime account merge replaces the root `streaming`
+   * object wholesale (Discord). Migration then seeds account objects it
+   * materializes with the inherited root settings. Leave unset for channels
+   * that deep-merge streaming at runtime (Slack, iMessage) — seeding there
+   * would freeze inheritance into the account config.
+   */
+  accountStreamingReplacesRoot?: boolean;
+  dm?: {
+    root?: boolean;
+    accounts?: boolean;
+    rootPromoteAllowFrom?: boolean;
+  };
+  /** Escape hatch for channel-specific per-account migrations (Discord voice.tts). */
+  normalizeAccountExtra?: (params: NormalizeLegacyChannelAccountParams) => CompatMutationResult;
+};
+
+function buildAliasRuleMessage(params: {
+  streaming: StreamingAliasSpec;
+  prefix: string;
+  root: boolean;
+}): string {
+  const { streaming, prefix } = params;
+  const native = streaming.resolveNativeTransport !== undefined;
+  const flat = [
+    ...(streaming.deliveryOnly ? [] : ["streamMode", "streaming (scalar)"]),
+    "chunkMode",
+    "blockStreaming",
+    ...(streaming.includePreviewChunk ? ["draftChunk"] : []),
+    "blockStreamingCoalesce",
+    ...(native ? ["nativeStreaming"] : []),
+  ];
+  const nested = [
+    ...(streaming.deliveryOnly ? [] : ["mode"]),
+    "chunkMode",
+    ...(streaming.includePreviewChunk ? ["preview.chunk"] : []),
+    "block.enabled",
+    "block.coalesce",
+    ...(native ? ["nativeTransport"] : []),
+  ];
+  // Root messages spell out the ambiguous scalar `streaming` key with its full
+  // path; account messages prefix only the first key. Matches the established
+  // hand-written doctor message format.
+  const prefixedCount = params.root && !streaming.deliveryOnly ? 2 : 1;
+  const keys = flat.map((key, index) => (index < prefixedCount ? `${prefix}.${key}` : key));
+  const keyList = `${keys.slice(0, -1).join(", ")}, and ${keys.at(-1)}`;
+  return `${keyList} are legacy; use ${prefix}.streaming.{${nested.join(",")}}. Run "openclaw doctor --fix".`;
+}
+
+/**
+ * Builds the standard channel doctor alias-migration surface from a small spec:
+ * detection rules (root + accounts), the per-entry matcher, and the config
+ * normalizer. Channels with additional migrations compose around these pieces.
+ */
+export function defineChannelAliasMigration(spec: ChannelAliasMigrationSpec): {
+  legacyConfigRules: LegacyConfigRule[];
+  hasLegacyAliases: (value: unknown) => boolean;
+  normalizeChannelConfig: (params: { cfg: OpenClawConfig; changes?: string[] }) => {
+    config: OpenClawConfig;
+    changes: string[];
+  };
+} {
+  const { streaming } = spec;
+  const pathPrefix = `channels.${spec.channelId}`;
+
+  const hasLegacyAliases = (value: unknown): boolean => {
+    if (streaming.deliveryOnly === true) {
+      const entry = asObjectRecord(value);
+      return (
+        entry !== null &&
+        (entry.chunkMode !== undefined ||
+          entry.blockStreaming !== undefined ||
+          entry.blockStreamingCoalesce !== undefined)
+      );
+    }
+    return hasLegacyStreamingAliases(value, {
+      includePreviewChunk: streaming.includePreviewChunk,
+      includeNativeTransport: streaming.resolveNativeTransport !== undefined,
+    });
+  };
+
+  const resolveStreamingOptions = (
+    entry: Record<string, unknown>,
+  ): LegacyStreamingAliasOptions => ({
+    resolvedMode:
+      streaming.resolveMode?.(entry) ??
+      resolveLegacyAliasStreamingMode(entry, streaming.defaultMode),
+    aliasOnlyMode: streaming.absentObjectDefault,
+    includePreviewChunk: streaming.includePreviewChunk,
+    resolvedNativeTransport: streaming.resolveNativeTransport?.(entry),
+  });
+
+  const normalizeChannelConfig = (params: { cfg: OpenClawConfig; changes?: string[] }) => {
+    const changes = params.changes ?? [];
+    const channels = params.cfg.channels as Record<string, unknown> | undefined;
+    const entry = asObjectRecord(channels?.[spec.channelId]);
+    if (!entry) {
+      return { config: params.cfg, changes };
+    }
+    if (
+      streaming.deliveryOnly === true &&
+      !hasLegacyAliases(entry) &&
+      !hasLegacyAccountStreamingAliases(entry.accounts, hasLegacyAliases)
+    ) {
+      return { config: params.cfg, changes };
+    }
+    const result = normalizeLegacyChannelAliases({
+      entry,
+      pathPrefix,
+      changes,
+      normalizeDm: spec.dm?.root,
+      rootDmPromoteAllowFrom: spec.dm?.rootPromoteAllowFrom,
+      normalizeAccountDm: spec.dm?.accounts,
+      seedAccountStreamingFromRoot: spec.accountStreamingReplacesRoot,
+      resolveStreamingOptions,
+      normalizeAccountExtra: spec.normalizeAccountExtra,
+    });
+    if (!result.changed) {
+      return { config: params.cfg, changes };
+    }
+    return {
+      config: {
+        ...params.cfg,
+        channels: { ...channels, [spec.channelId]: result.entry },
+      } as OpenClawConfig,
+      changes,
+    };
+  };
+
+  return {
+    legacyConfigRules: [
+      {
+        path: ["channels", spec.channelId],
+        message: buildAliasRuleMessage({ streaming, prefix: pathPrefix, root: true }),
+        match: hasLegacyAliases,
+      },
+      {
+        path: ["channels", spec.channelId, "accounts"],
+        message: buildAliasRuleMessage({
+          streaming,
+          prefix: `${pathPrefix}.accounts.<id>`,
+          root: false,
+        }),
+        match: (value) => hasLegacyAccountStreamingAliases(value, hasLegacyAliases),
+      },
+    ],
+    hasLegacyAliases,
+    normalizeChannelConfig,
+  };
+}
diff --git a/src/config/channel-compat-normalization.ts b/src/config/channel-compat-normalization.ts
index b07550319aa0..6fb4b0c9102f 100644
--- a/src/config/channel-compat-normalization.ts
+++ b/src/config/channel-compat-normalization.ts
@@ -19,7 +19,6 @@ export type LegacyStreamingAliasOptions = {
   aliasOnlyMode?: string;
   includePreviewChunk?: boolean;
   resolvedNativeTransport?: unknown;
-  offModeLegacyNotice?: (pathPrefix: string) => string;
 };
 
 /** Account-level channel config passed to channel-specific doctor migrations. */
@@ -227,7 +226,10 @@ export function normalizeLegacyStreamingAliases(
   // object without `mode` (Discord defaults to progress only when the whole
   // object is absent). Pin the previous effective mode so migration never
   // changes behavior. Guarded on `changed` so entries with no movable alias
-  // stay a no-op instead of minting a mode-only mutation.
+  // stay a no-op instead of minting a mode-only mutation. Account callers
+  // suppress aliasOnlyMode when a root streaming object exists: the seed in
+  // normalizeLegacyChannelAliases carries the inherited settings instead, and
+  // pinning the absent-object default there would change effective behavior.
   if (
     changed &&
     beforeStreaming === undefined &&
@@ -248,16 +250,41 @@ export function normalizeLegacyStreamingAliases(
     streaming.block = block;
   }
   updated.streaming = streaming;
-  if (
-    hadLegacyStreamMode &&
-    params.resolvedMode === "off" &&
-    params.offModeLegacyNotice !== undefined
-  ) {
-    params.changes.push(params.offModeLegacyNotice(params.pathPrefix));
-  }
   return { entry: updated, changed };
 }
 
+/** Deep-fills record fields missing from target with copies of source values. */
+function fillMissingRecordFields(
+  target: Record<string, unknown>,
+  source: Record<string, unknown>,
+): { value: Record<string, unknown>; filled: boolean } {
+  let filled = false;
+  const value = { ...target };
+  for (const [key, sourceValue] of Object.entries(source)) {
+    if (sourceValue === undefined) {
+      continue;
+    }
+    const existing = value[key];
+    if (existing === undefined) {
+      // Copy so later account-level edits never alias the root config object.
+      value[key] = structuredClone(sourceValue);
+      filled = true;
+      continue;
+    }
+    const existingRecord = asObjectRecord(existing);
+    const sourceRecord = asObjectRecord(sourceValue);
+    if (!existingRecord || !sourceRecord) {
+      continue;
+    }
+    const merged = fillMissingRecordFields(existingRecord, sourceRecord);
+    if (merged.filled) {
+      value[key] = merged.value;
+      filled = true;
+    }
+  }
+  return { value, filled };
+}
+
 /**
  * Runs generic channel doctor alias migration for the root entry and accounts.
  *
@@ -271,6 +298,14 @@ export function normalizeLegacyChannelAliases(params: {
   normalizeDm?: boolean;
   rootDmPromoteAllowFrom?: boolean;
   normalizeAccountDm?: boolean;
+  /**
+   * Set for channels whose runtime account merge replaces the root `streaming`
+   * object wholesale (`streaming` not deep-merged). Doctor then seeds account
+   * objects it materializes with the inherited root settings. Channels that
+   * deep-merge streaming (slack, imessage) must NOT seed: their runtime keeps
+   * composing root+account, and seeded copies would freeze inheritance.
+   */
+  seedAccountStreamingFromRoot?: boolean;
   resolveStreamingOptions: (entry: Record<string, unknown>) => LegacyStreamingAliasOptions;
   normalizeAccountExtra?: (params: NormalizeLegacyChannelAccountParams) => CompatMutationResult;
 }): CompatMutationResult {
@@ -302,6 +337,12 @@ export function normalizeLegacyChannelAliases(params: {
     return { entry: updated, changed };
   }
 
+  // For replace-semantics channels (seedAccountStreamingFromRoot), an account
+  // object materialized by migration must be seeded with the settings the
+  // account previously inherited from the root object, or `doctor --fix`
+  // silently changes effective delivery/preview behavior for that account.
+  const rootStreaming = asObjectRecord(updated.streaming);
+
   let accountsChanged = false;
   const accounts = { ...rawAccounts };
   for (const [accountId, rawAccount] of Object.entries(rawAccounts)) {
@@ -323,15 +364,39 @@ export function normalizeLegacyChannelAliases(params: {
       accountChanged = accountDm.changed;
     }
 
+    const accountStreamingOptions = { ...params.resolveStreamingOptions(accountEntry) };
+    if (rootStreaming) {
+      // Truth table rows 2-3: with a root object to seed from, the account
+      // previously resolved that object's semantics (its mode, or the
+      // object-without-mode default), so pinning absentObjectDefault is wrong.
+      delete accountStreamingOptions.aliasOnlyMode;
+    }
+    const beforeAccountStreaming = accountEntry.streaming;
     const accountStreaming = normalizeLegacyStreamingAliases({
       entry: accountEntry,
       pathPrefix: accountPathPrefix,
       changes: params.changes,
-      ...params.resolveStreamingOptions(accountEntry),
+      ...accountStreamingOptions,
     });
     accountEntry = accountStreaming.entry;
     accountChanged = accountChanged || accountStreaming.changed;
 
+    if (
+      params.seedAccountStreamingFromRoot === true &&
+      accountStreaming.changed &&
+      beforeAccountStreaming === undefined &&
+      rootStreaming
+    ) {
+      const created = asObjectRecord(accountEntry.streaming);
+      const seeded = created ? fillMissingRecordFields(created, rootStreaming) : null;
+      if (seeded?.filled) {
+        accountEntry = { ...accountEntry, streaming: seeded.value };
+        params.changes.push(
+          `Copied ${params.pathPrefix}.streaming into ${accountPathPrefix}.streaming to keep inherited settings while migrating flat streaming keys.`,
+        );
+      }
+    }
+
     const accountExtra = params.normalizeAccountExtra?.({
       account: accountEntry,
       accountId,
diff --git a/src/plugin-sdk/runtime-doctor.ts b/src/plugin-sdk/runtime-doctor.ts
index 8a904eace553..2cff80970a47 100644
--- a/src/plugin-sdk/runtime-doctor.ts
+++ b/src/plugin-sdk/runtime-doctor.ts
@@ -2,6 +2,11 @@
  * Runtime SDK subpath for plugin doctor migrations, compat checks, and uninstall helpers.
  */
 export { collectProviderDangerousNameMatchingScopes } from "../config/dangerous-name-matching.js";
+export { defineChannelAliasMigration } from "../config/channel-alias-migration.js";
+export type {
+  ChannelAliasMigrationSpec,
+  StreamingAliasMode,
+} from "../config/channel-alias-migration.js";
 export {
   asObjectRecord,
   hasLegacyAccountStreamingAliases,