diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 74ad18a..67c1049 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,6 +23,7 @@ jobs:
           bun-version: latest
 
       - run: bun install
+      - run: bun run deps:check
       - run: bun run test:coverage:ci
       - run: bun run build:openclaw:check
 
diff --git a/deps-baseline.json b/deps-baseline.json
new file mode 100644
index 0000000..047731e
--- /dev/null
+++ b/deps-baseline.json
@@ -0,0 +1,7 @@
+{
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.26.0",
+    "zod": "^3.24.0",
+    "aelf-sdk": "^3.5.1-beta.0"
+  }
+}
diff --git a/lib/config.ts b/lib/config.ts
index e8daaa5..a10c80d 100644
--- a/lib/config.ts
+++ b/lib/config.ts
@@ -2,6 +2,18 @@ import { homedir } from 'node:os';
 import { join } from 'node:path';
 import type { NodeProfile } from './types.js';
 
+export const CHAIN_IDS = {
+  AELF: 'AELF',
+  TDVV: 'tDVV',
+} as const;
+
+export const DEFAULT_CHAIN_ID = CHAIN_IDS.AELF;
+
+export const DEFAULT_RPC_URLS: Record<(typeof CHAIN_IDS)[keyof typeof CHAIN_IDS], string> = {
+  [CHAIN_IDS.AELF]: 'https://aelf-public-node.aelf.io',
+  [CHAIN_IDS.TDVV]: 'https://tdvv-public-node.aelf.io',
+};
+
 const DEFAULT_TIMEOUT_MS = 10_000;
 const DEFAULT_RETRY = 1;
 const DEFAULT_SDK_INSTANCE_CACHE_MAX = 32;
@@ -11,15 +23,15 @@ const DEFAULT_REST_CLIENT_CACHE_MAX = 64;
 export const DEFAULT_NODES: NodeProfile[] = [
   {
     id: 'default-aelf',
-    chainId: 'AELF',
-    rpcUrl: 'https://aelf-public-node.aelf.io',
+    chainId: CHAIN_IDS.AELF,
+    rpcUrl: DEFAULT_RPC_URLS[CHAIN_IDS.AELF],
     enabled: true,
     source: 'default',
   },
   {
     id: 'default-tdvv',
-    chainId: 'tDVV',
-    rpcUrl: 'https://tdvv-public-node.aelf.io',
+    chainId: CHAIN_IDS.TDVV,
+    rpcUrl: DEFAULT_RPC_URLS[CHAIN_IDS.TDVV],
     enabled: true,
     source: 'default',
   },
@@ -52,11 +64,11 @@ export function getRestClientCacheMax(): number {
 }
 
 export function getRegistryPath(): string {
-  return process.env.AELF_NODE_REGISTRY_PATH || join(homedir(), '.aelf-node-skill', 'nodes.json');
+  return process.env.AELF_NODE_REGISTRY_PATH ?? join(homedir(), '.aelf-node-skill', 'nodes.json');
 }
 
 export function getEoaPrivateKey(override?: string): string | undefined {
-  return override || process.env.AELF_PRIVATE_KEY;
+  return override ?? process.env.AELF_PRIVATE_KEY;
 }
 
 export function getEnvOverrideNodes(): NodeProfile[] {
@@ -64,7 +76,7 @@ export function getEnvOverrideNodes(): NodeProfile[] {
   if (process.env.AELF_NODE_AELF_RPC_URL) {
     result.push({
       id: 'env-aelf',
-      chainId: 'AELF',
+      chainId: CHAIN_IDS.AELF,
       rpcUrl: process.env.AELF_NODE_AELF_RPC_URL,
       enabled: true,
       source: 'env',
@@ -73,7 +85,7 @@ export function getEnvOverrideNodes(): NodeProfile[] {
   if (process.env.AELF_NODE_TDVV_RPC_URL) {
     result.push({
       id: 'env-tdvv',
-      chainId: 'tDVV',
+      chainId: CHAIN_IDS.TDVV,
       rpcUrl: process.env.AELF_NODE_TDVV_RPC_URL,
       enabled: true,
       source: 'env',
diff --git a/lib/node-router.ts b/lib/node-router.ts
index 73d5a73..a5b77a6 100644
--- a/lib/node-router.ts
+++ b/lib/node-router.ts
@@ -1,4 +1,4 @@
-import { DEFAULT_NODES, getEnvOverrideNodes } from './config.js';
+import { DEFAULT_CHAIN_ID, DEFAULT_NODES, getEnvOverrideNodes } from './config.js';
 import { listImportedNodes } from './node-registry.js';
 import { validateChainTargetInput } from './validators.js';
 import type { NodeProfile, ResolveNodeInput, ResolveNodeResult } from './types.js';
@@ -21,7 +21,7 @@ export async function resolveNode(input: ResolveNodeInput): Promise<ResolveNodeR
     return {
       node: {
         id: 'direct-rpc',
-        chainId: input.chainId || 'AELF',
+        chainId: input.chainId ?? DEFAULT_CHAIN_ID,
         rpcUrl: input.rpcUrl,
         enabled: true,
         source: 'direct',
@@ -40,7 +40,7 @@ export async function resolveNode(input: ResolveNodeInput): Promise<ResolveNodeR
     return { node, candidates };
   }
 
-  const chainId = input.chainId || 'AELF';
+  const chainId = input.chainId ?? DEFAULT_CHAIN_ID;
   const node = candidates.find(item => item.chainId === chainId);
   if (!node) {
     throw new Error(`No available node for chainId: ${chainId}`);
diff --git a/package.json b/package.json
index 8da9340..845b8f2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@blockchain-forever/aelf-node-skill",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "AElf Node Skill for AI agents: REST for reads, SDK for contract execution, and selective fallback for fee estimate.",
   "type": "module",
   "main": "index.ts",
@@ -40,7 +40,8 @@
     "test:coverage:ci": "COVERAGE_MIN_LINES=85 COVERAGE_MIN_FUNCS=80 bun run test:unit:coverage && bun run coverage:gate",
     "build:openclaw": "bun run bin/generate-openclaw.ts",
     "build:openclaw:check": "bun run bin/generate-openclaw.ts --check",
-    "coverage:badge": "bun run bin/generate-coverage-badge.ts"
+    "coverage:badge": "bun run bin/generate-coverage-badge.ts",
+    "deps:check": "bun run scripts/check-deps-baseline.ts"
   },
   "keywords": [
     "aelf",
@@ -64,7 +65,7 @@
   "license": "MIT",
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.26.0",
-    "aelf-sdk": "3.5.1-beta.0",
+    "aelf-sdk": "^3.5.1-beta.0",
     "commander": "^12.1.0",
     "zod": "^3.24.0"
   },
diff --git a/scripts/check-deps-baseline.ts b/scripts/check-deps-baseline.ts
new file mode 100644
index 0000000..812c4e9
--- /dev/null
+++ b/scripts/check-deps-baseline.ts
@@ -0,0 +1,58 @@
+#!/usr/bin/env bun
+import { existsSync, readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+type Baseline = {
+  dependencies: Record<string, string>;
+};
+
+function readJson<T>(filePath: string): T {
+  return JSON.parse(readFileSync(filePath, 'utf8')) as T;
+}
+
+function main() {
+  const cwd = process.cwd();
+  const baselinePath = resolve(cwd, 'deps-baseline.json');
+  const packagePath = resolve(cwd, 'package.json');
+
+  if (!existsSync(baselinePath)) {
+    console.error(`[deps:check] missing deps-baseline.json at ${baselinePath}`);
+    process.exit(1);
+  }
+
+  if (!existsSync(packagePath)) {
+    console.error(`[deps:check] missing package.json at ${packagePath}`);
+    process.exit(1);
+  }
+
+  const baseline = readJson<Baseline>(baselinePath);
+  const pkg = readJson<any>(packagePath);
+  const declaredDeps = {
+    ...(pkg.dependencies || {}),
+    ...(pkg.devDependencies || {}),
+  } as Record<string, string>;
+
+  const failures: string[] = [];
+  for (const [name, expected] of Object.entries(baseline.dependencies || {})) {
+    const actual = declaredDeps[name];
+    if (!actual) {
+      failures.push(`${name}: missing (expected ${expected})`);
+      continue;
+    }
+    if (actual !== expected) {
+      failures.push(`${name}: expected ${expected}, got ${actual}`);
+    }
+  }
+
+  if (failures.length > 0) {
+    console.error('[deps:check] dependency baseline mismatch:');
+    for (const failure of failures) {
+      console.error(`- ${failure}`);
+    }
+    process.exit(1);
+  }
+
+  console.log('[deps:check] passed');
+}
+
+main();
diff --git a/tsconfig.json b/tsconfig.json
index e692ef7..e5c0303 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,7 +8,12 @@
     "forceConsistentCasingInFileNames": true,
     "esModuleInterop": true,
     "resolveJsonModule": true,
-    "types": ["bun-types"]
+    "types": [
+      "bun-types"
+    ],
+    "noEmit": true
   },
-  "include": ["**/*.ts"]
+  "include": [
+    "**/*.ts"
+  ]
 }