diff --git a/extensions/discord/src/directory-config.ts b/extensions/discord/src/directory-config.ts
index 8828a1854eb..9c5e794924a 100644
--- a/extensions/discord/src/directory-config.ts
+++ b/extensions/discord/src/directory-config.ts
@@ -4,15 +4,20 @@ import {
   toDirectoryEntries,
   type DirectoryConfigParams,
 } from "openclaw/plugin-sdk/directory-runtime";
-import type { InspectedDiscordAccount } from "../../../src/channels/read-only-account-inspect.discord.runtime.js";
-import { inspectReadOnlyChannelAccount } from "../../../src/channels/read-only-account-inspect.js";
+import { inspectDiscordAccount } from "../api.js";
+import type { InspectedDiscordAccount } from "../api.js";
 
-export async function listDiscordDirectoryPeersFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "discord",
+function inspectDiscordDirectoryAccount(
+  params: DirectoryConfigParams,
+): InspectedDiscordAccount | null {
+  return inspectDiscordAccount({
     cfg: params.cfg,
     accountId: params.accountId,
-  })) as InspectedDiscordAccount | null;
+  });
+}
+
+export async function listDiscordDirectoryPeersFromConfig(params: DirectoryConfigParams) {
+  const account = inspectDiscordDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
@@ -34,11 +39,7 @@ export async function listDiscordDirectoryPeersFromConfig(params: DirectoryConfi
 }
 
 export async function listDiscordDirectoryGroupsFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "discord",
-    cfg: params.cfg,
-    accountId: params.accountId,
-  })) as InspectedDiscordAccount | null;
+  const account = inspectDiscordDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
diff --git a/extensions/slack/src/directory-config.ts b/extensions/slack/src/directory-config.ts
index 635222f9c2e..0bc0f49804e 100644
--- a/extensions/slack/src/directory-config.ts
+++ b/extensions/slack/src/directory-config.ts
@@ -1,3 +1,4 @@
+import { normalizeSlackMessagingTarget } from "openclaw/plugin-sdk/channel-runtime";
 import {
   applyDirectoryQueryAndLimit,
   collectNormalizedDirectoryIds,
@@ -5,16 +6,18 @@ import {
   toDirectoryEntries,
   type DirectoryConfigParams,
 } from "openclaw/plugin-sdk/directory-runtime";
-import { normalizeSlackMessagingTarget } from "../../../src/channels/plugins/normalize/slack.js";
-import { inspectReadOnlyChannelAccount } from "../../../src/channels/read-only-account-inspect.js";
-import type { InspectedSlackAccount } from "../../../src/channels/read-only-account-inspect.slack.runtime.js";
+import { inspectSlackAccount } from "../api.js";
+import type { InspectedSlackAccount } from "../api.js";
 
-export async function listSlackDirectoryPeersFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "slack",
+function inspectSlackDirectoryAccount(params: DirectoryConfigParams): InspectedSlackAccount | null {
+  return inspectSlackAccount({
     cfg: params.cfg,
     accountId: params.accountId,
-  })) as InspectedSlackAccount | null;
+  });
+}
+
+export async function listSlackDirectoryPeersFromConfig(params: DirectoryConfigParams) {
+  const account = inspectSlackDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
@@ -40,11 +43,7 @@ export async function listSlackDirectoryPeersFromConfig(params: DirectoryConfigP
 }
 
 export async function listSlackDirectoryGroupsFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "slack",
-    cfg: params.cfg,
-    accountId: params.accountId,
-  })) as InspectedSlackAccount | null;
+  const account = inspectSlackDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
diff --git a/extensions/slack/src/message-action-dispatch.ts b/extensions/slack/src/message-action-dispatch.ts
index 4a2e17f5455..55576d9e822 100644
--- a/extensions/slack/src/message-action-dispatch.ts
+++ b/extensions/slack/src/message-action-dispatch.ts
@@ -1,7 +1,7 @@
 import type { AgentToolResult } from "@mariozechner/pi-agent-core";
 import type { ChannelMessageActionContext } from "openclaw/plugin-sdk/channel-runtime";
 import { normalizeInteractiveReply } from "openclaw/plugin-sdk/interactive-runtime";
-import { readNumberParam, readStringParam } from "../../../src/agents/tools/common.js";
+import { readNumberParam, readStringParam } from "openclaw/plugin-sdk/slack-core";
 import { parseSlackBlocksInput } from "./blocks-input.js";
 import { buildSlackInteractiveBlocks } from "./blocks-render.js";
 
diff --git a/extensions/telegram/src/directory-config.ts b/extensions/telegram/src/directory-config.ts
index 10abc88d784..3355b295cca 100644
--- a/extensions/telegram/src/directory-config.ts
+++ b/extensions/telegram/src/directory-config.ts
@@ -6,15 +6,20 @@ import {
   toDirectoryEntries,
   type DirectoryConfigParams,
 } from "openclaw/plugin-sdk/directory-runtime";
-import { inspectReadOnlyChannelAccount } from "../../../src/channels/read-only-account-inspect.js";
-import type { InspectedTelegramAccount } from "../../../src/channels/read-only-account-inspect.telegram.runtime.js";
+import { inspectTelegramAccount } from "../api.js";
+import type { InspectedTelegramAccount } from "../api.js";
 
-export async function listTelegramDirectoryPeersFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "telegram",
+async function inspectTelegramDirectoryAccount(
+  params: DirectoryConfigParams,
+): Promise<InspectedTelegramAccount | null> {
+  return inspectTelegramAccount({
     cfg: params.cfg,
     accountId: params.accountId,
-  })) as InspectedTelegramAccount | null;
+  });
+}
+
+export async function listTelegramDirectoryPeersFromConfig(params: DirectoryConfigParams) {
+  const account = await inspectTelegramDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
@@ -36,11 +41,7 @@ export async function listTelegramDirectoryPeersFromConfig(params: DirectoryConf
 }
 
 export async function listTelegramDirectoryGroupsFromConfig(params: DirectoryConfigParams) {
-  const account = (await inspectReadOnlyChannelAccount({
-    channelId: "telegram",
-    cfg: params.cfg,
-    accountId: params.accountId,
-  })) as InspectedTelegramAccount | null;
+  const account = await inspectTelegramDirectoryAccount(params);
   if (!account || !("config" in account)) {
     return [];
   }
diff --git a/extensions/whatsapp/src/directory-config.ts b/extensions/whatsapp/src/directory-config.ts
index ad7b7d257e7..1a5fbbff9b0 100644
--- a/extensions/whatsapp/src/directory-config.ts
+++ b/extensions/whatsapp/src/directory-config.ts
@@ -3,8 +3,8 @@ import {
   listDirectoryUserEntriesFromAllowFrom,
   type DirectoryConfigParams,
 } from "openclaw/plugin-sdk/directory-runtime";
-import { isWhatsAppGroupJid, normalizeWhatsAppTarget } from "../../../src/whatsapp/normalize.js";
 import { resolveWhatsAppAccount } from "./accounts.js";
+import { isWhatsAppGroupJid, normalizeWhatsAppTarget } from "./normalize.js";
 
 export async function listWhatsAppDirectoryPeersFromConfig(params: DirectoryConfigParams) {
   const account = resolveWhatsAppAccount({ cfg: params.cfg, accountId: params.accountId });
diff --git a/extensions/whatsapp/src/normalize.ts b/extensions/whatsapp/src/normalize.ts
index bfecb31e4a5..d0506cd5883 100644
--- a/extensions/whatsapp/src/normalize.ts
+++ b/extensions/whatsapp/src/normalize.ts
@@ -1,5 +1,7 @@
 export {
+  isWhatsAppGroupJid,
   looksLikeWhatsAppTargetId,
   normalizeWhatsAppAllowFromEntries,
   normalizeWhatsAppMessagingTarget,
+  normalizeWhatsAppTarget,
 } from "openclaw/plugin-sdk/channel-runtime";
diff --git a/src/plugin-sdk/channel-import-guardrails.test.ts b/src/plugin-sdk/channel-import-guardrails.test.ts
index 69626948743..a4ca46a569c 100644
--- a/src/plugin-sdk/channel-import-guardrails.test.ts
+++ b/src/plugin-sdk/channel-import-guardrails.test.ts
@@ -252,7 +252,10 @@ function collectCoreSourceFiles(): string[] {
         fullPath.includes(".test.") ||
         fullPath.includes(".spec.") ||
         fullPath.includes(".fixture.") ||
-        fullPath.includes(".snap")
+        fullPath.includes(".snap") ||
+        // src/plugin-sdk is the curated bridge layer; validate its contracts with dedicated
+        // plugin-sdk guardrails instead of the generic "core should not touch extensions" rule.
+        fullPath.includes(`${resolve(ROOT_DIR, "plugin-sdk")}/`)
       ) {
         continue;
       }
diff --git a/src/plugin-sdk/channel-runtime.ts b/src/plugin-sdk/channel-runtime.ts
index 5e90b196c09..59832d70f80 100644
--- a/src/plugin-sdk/channel-runtime.ts
+++ b/src/plugin-sdk/channel-runtime.ts
@@ -43,6 +43,7 @@ export * from "../channels/plugins/whatsapp-heartbeat.js";
 export * from "../infra/outbound/send-deps.js";
 export * from "../polls.js";
 export * from "../utils/message-channel.js";
+export * from "../whatsapp/normalize.js";
 export { createActionGate, jsonResult, readStringParam } from "../agents/tools/common.js";
 export * from "./channel-lifecycle.js";
 export * from "./directory-runtime.js";
diff --git a/src/plugin-sdk/package-contract-guardrails.test.ts b/src/plugin-sdk/package-contract-guardrails.test.ts
new file mode 100644
index 00000000000..046562708cd
--- /dev/null
+++ b/src/plugin-sdk/package-contract-guardrails.test.ts
@@ -0,0 +1,145 @@
+import { readdirSync, readFileSync } from "node:fs";
+import { dirname, relative, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+import { pluginSdkEntrypoints } from "./entrypoints.js";
+
+const ROOT_DIR = resolve(dirname(fileURLToPath(import.meta.url)), "..");
+const REPO_ROOT = resolve(ROOT_DIR, "..");
+const REFERENCE_SCAN_ROOTS = ["src", "extensions", "scripts", "test", "docs"] as const;
+const PLUGIN_SDK_SUBPATH_PATTERN = /openclaw\/plugin-sdk\/([a-z0-9][a-z0-9-]*)\b/g;
+
+function collectPluginSdkPackageExports(): string[] {
+  const packageJson = JSON.parse(readFileSync(resolve(REPO_ROOT, "package.json"), "utf8")) as {
+    exports?: Record<string, unknown>;
+  };
+  const exports = packageJson.exports ?? {};
+  const subpaths: string[] = [];
+  for (const key of Object.keys(exports)) {
+    if (key === "./plugin-sdk") {
+      subpaths.push("index");
+      continue;
+    }
+    if (!key.startsWith("./plugin-sdk/")) {
+      continue;
+    }
+    subpaths.push(key.slice("./plugin-sdk/".length));
+  }
+  return subpaths.sort();
+}
+
+function collectPluginSdkSourceNames(): string[] {
+  const pluginSdkDir = resolve(REPO_ROOT, "src", "plugin-sdk");
+  return readdirSync(pluginSdkDir, { withFileTypes: true })
+    .filter(
+      (entry) => entry.isFile() && entry.name.endsWith(".ts") && !entry.name.endsWith(".test.ts"),
+    )
+    .map((entry) => entry.name.slice(0, -".ts".length))
+    .sort();
+}
+
+function collectTextFiles(rootRelativeDir: string): string[] {
+  const rootDir = resolve(REPO_ROOT, rootRelativeDir);
+  const files: string[] = [];
+  const stack = [rootDir];
+  while (stack.length > 0) {
+    const current = stack.pop();
+    if (!current) {
+      continue;
+    }
+    for (const entry of readdirSync(current, { withFileTypes: true })) {
+      const fullPath = resolve(current, entry.name);
+      if (entry.isDirectory()) {
+        if (entry.name === "node_modules" || entry.name === "dist" || entry.name === "coverage") {
+          continue;
+        }
+        stack.push(fullPath);
+        continue;
+      }
+      if (!entry.isFile()) {
+        continue;
+      }
+      if (
+        /\.(?:[cm]?ts|[cm]?js|tsx|jsx|md|mdx|json)$/u.test(entry.name) &&
+        !entry.name.endsWith(".snap")
+      ) {
+        files.push(fullPath);
+      }
+    }
+  }
+  return files;
+}
+
+function collectPluginSdkSubpathReferences() {
+  const references: Array<{ file: string; subpath: string }> = [];
+  for (const rootRelativeDir of REFERENCE_SCAN_ROOTS) {
+    for (const fullPath of collectTextFiles(rootRelativeDir)) {
+      const source = readFileSync(fullPath, "utf8");
+      for (const match of source.matchAll(PLUGIN_SDK_SUBPATH_PATTERN)) {
+        const subpath = match[1];
+        if (!subpath) {
+          continue;
+        }
+        references.push({
+          file: relative(REPO_ROOT, fullPath).replaceAll("\\", "/"),
+          subpath,
+        });
+      }
+    }
+  }
+  return references;
+}
+
+describe("plugin-sdk package contract guardrails", () => {
+  it("keeps package.json exports aligned with built plugin-sdk entrypoints", () => {
+    expect(collectPluginSdkPackageExports()).toEqual([...pluginSdkEntrypoints].sort());
+  });
+
+  it("keeps repo openclaw/plugin-sdk/<name> references on exported built subpaths", () => {
+    const entrypoints = new Set(pluginSdkEntrypoints);
+    const exports = new Set(collectPluginSdkPackageExports());
+    const failures: string[] = [];
+
+    for (const reference of collectPluginSdkSubpathReferences()) {
+      const missingFrom: string[] = [];
+      if (!entrypoints.has(reference.subpath)) {
+        missingFrom.push("scripts/lib/plugin-sdk-entrypoints.json");
+      }
+      if (!exports.has(reference.subpath)) {
+        missingFrom.push("package.json exports");
+      }
+      if (missingFrom.length === 0) {
+        continue;
+      }
+      failures.push(
+        `${reference.file} references openclaw/plugin-sdk/${reference.subpath}, but ${reference.subpath} is missing from ${missingFrom.join(" and ")}`,
+      );
+    }
+
+    expect(failures).toEqual([]);
+  });
+
+  it("does not leave referenced src/plugin-sdk source names stranded outside the public contract", () => {
+    const exported = new Set(pluginSdkEntrypoints);
+    const references = collectPluginSdkSubpathReferences();
+    const failures: string[] = [];
+
+    for (const sourceName of collectPluginSdkSourceNames()) {
+      if (exported.has(sourceName) || sourceName === "compat" || sourceName === "index") {
+        continue;
+      }
+      const matchingRefs = references.filter((reference) => reference.subpath === sourceName);
+      if (matchingRefs.length === 0) {
+        continue;
+      }
+      failures.push(
+        `src/plugin-sdk/${sourceName}.ts is referenced as openclaw/plugin-sdk/${sourceName} in ${matchingRefs
+          .map((reference) => reference.file)
+          .sort()
+          .join(", ")}, but ${sourceName} is not exported as a public plugin-sdk subpath`,
+      );
+    }
+
+    expect(failures).toEqual([]);
+  });
+});
diff --git a/src/plugin-sdk/runtime-api-guardrails.test.ts b/src/plugin-sdk/runtime-api-guardrails.test.ts
index 1b29d1570c6..b05bdf482f7 100644
--- a/src/plugin-sdk/runtime-api-guardrails.test.ts
+++ b/src/plugin-sdk/runtime-api-guardrails.test.ts
@@ -27,15 +27,25 @@ const RUNTIME_API_EXPORT_GUARDS: Record<string, readonly string[]> = {
     'export * from "./src/send.js";',
   ],
   "extensions/imessage/runtime-api.ts": [
-    'export * from "./src/monitor.js";',
-    'export * from "./src/probe.js";',
-    'export * from "./src/send.js";',
+    'export type { IMessageAccountConfig } from "../../src/config/types.imessage.js";',
+    'export type { ChannelPlugin } from "../../src/channels/plugins/types.plugin.js";',
+    'export { DEFAULT_ACCOUNT_ID, PAIRING_APPROVED_MESSAGE, buildChannelConfigSchema, getChatChannelMeta } from "../../src/plugin-sdk/channel-plugin-common.js";',
+    'export { formatTrimmedAllowFromEntries, resolveIMessageConfigAllowFrom, resolveIMessageConfigDefaultTo } from "../../src/plugin-sdk/channel-config-helpers.js";',
+    'export { collectStatusIssuesFromLastError } from "../../src/plugin-sdk/status-helpers.js";',
+    'export { resolveChannelMediaMaxBytes } from "../../src/channels/plugins/media-limits.js";',
+    'export { looksLikeIMessageTargetId, normalizeIMessageMessagingTarget } from "../../src/channels/plugins/normalize/imessage.js";',
+    'export { IMessageConfigSchema } from "../../src/config/zod-schema.providers-core.js";',
+    'export { resolveIMessageGroupRequireMention, resolveIMessageGroupToolPolicy } from "./src/group-policy.js";',
+    'export { monitorIMessageProvider } from "./src/monitor.js";',
+    'export type { MonitorIMessageOpts } from "./src/monitor.js";',
+    'export { probeIMessage } from "./src/probe.js";',
+    'export { sendMessageIMessage } from "./src/send.js";',
   ],
   "extensions/googlechat/runtime-api.ts": ['export * from "openclaw/plugin-sdk/googlechat";'],
   "extensions/nextcloud-talk/runtime-api.ts": [
     'export * from "openclaw/plugin-sdk/nextcloud-talk";',
   ],
-  "extensions/signal/runtime-api.ts": ['export * from "./src/index.js";'],
+  "extensions/signal/runtime-api.ts": ['export * from "./src/runtime-api.js";'],
   "extensions/slack/runtime-api.ts": [
     'export * from "./src/action-runtime.js";',
     'export * from "./src/directory-live.js";',
@@ -44,14 +54,21 @@ const RUNTIME_API_EXPORT_GUARDS: Record<string, readonly string[]> = {
     'export * from "./src/resolve-users.js";',
   ],
   "extensions/telegram/runtime-api.ts": [
-    'export * from "./src/audit.js";',
-    'export * from "./src/action-runtime.js";',
-    'export * from "./src/channel-actions.js";',
-    'export * from "./src/monitor.js";',
-    'export * from "./src/probe.js";',
-    'export * from "./src/send.js";',
-    'export * from "./src/thread-bindings.js";',
-    'export * from "./src/token.js";',
+    'export type { ChannelPlugin, OpenClawConfig, TelegramActionConfig } from "../../src/plugin-sdk/telegram-core.js";',
+    'export type { ChannelMessageActionAdapter } from "../../src/channels/plugins/types.js";',
+    'export type { TelegramAccountConfig, TelegramNetworkConfig } from "../../src/config/types.js";',
+    'export type { OpenClawPluginApi, OpenClawPluginService, OpenClawPluginServiceContext, PluginLogger } from "../../src/plugins/types.js";',
+    'export type { AcpRuntime, AcpRuntimeCapabilities, AcpRuntimeDoctorReport, AcpRuntimeEnsureInput, AcpRuntimeEvent, AcpRuntimeHandle, AcpRuntimeStatus, AcpRuntimeTurnInput, AcpSessionUpdateTag } from "../../src/acp/runtime/types.js";',
+    'export type { AcpRuntimeErrorCode } from "../../src/acp/runtime/errors.js";',
+    'export { AcpRuntimeError } from "../../src/acp/runtime/errors.js";',
+    'export { DEFAULT_ACCOUNT_ID, normalizeAccountId } from "../../src/routing/session-key.js";',
+    'export { buildChannelConfigSchema, getChatChannelMeta, jsonResult, readNumberParam, readReactionParams, readStringArrayParam, readStringOrNumberParam, readStringParam, resolvePollMaxSelections, TelegramConfigSchema } from "../../src/plugin-sdk/telegram-core.js";',
+    'export { parseTelegramTopicConversation } from "../../src/acp/conversation-id.js";',
+    'export { clearAccountEntryFields } from "../../src/channels/plugins/config-helpers.js";',
+    'export { buildTokenChannelStatusSummary } from "../../src/plugin-sdk/status-helpers.js";',
+    'export { projectCredentialSnapshotFields, resolveConfiguredFromCredentialStatuses } from "../../src/channels/account-snapshot-fields.js";',
+    'export { resolveTelegramPollVisibility } from "../../src/poll-params.js";',
+    'export { PAIRING_APPROVED_MESSAGE } from "../../src/channels/plugins/pairing-message.js";',
   ],
   "extensions/whatsapp/runtime-api.ts": [
     'export * from "./src/active-listener.js";',