diff --git a/scripts/dev.mjs b/scripts/dev.mjs
index aae03d3b2..ba35aa9ea 100644
--- a/scripts/dev.mjs
+++ b/scripts/dev.mjs
@@ -3259,19 +3259,54 @@ function shouldTrustExistingSpacetimeToken(
     return false;
   }
 
+  // 本地 standalone 只认自己签发的 token：远程账号的 token（默认 CLI 配置里那种）
+  // 形如有效但验签必然失败，会在 pre-publish check 上抛 401 InvalidSize。
+  // 因此先按签发者判断，再做「与环境/CLI 一致」这类弱判断。
   const shellToken = String(env.GENARRATIVE_SPACETIME_TOKEN ?? '').trim();
   if (shellToken && shellToken === normalizedToken) {
+    // 显式覆盖（运维手动指定）优先，保持既有语义。
     return true;
   }
 
-  if (!isLoopbackSpacetimeServer(serverUrl)) {
+  const loopback = isLoopbackSpacetimeServer(serverUrl);
+  if (!loopback) {
     return true;
   }
 
+  // 本地 standalone 只认自己签发的 token：默认 CLI 配置里那枚远程账号 token
+  // 形如有效但验签必然失败（pre-publish check 401 InvalidSignature），不能信任。
+  if (!isLocallyIssuedSpacetimeToken(normalizedToken)) {
+    return false;
+  }
+
   const cliToken = resolveCliToken();
   return Boolean(cliToken && cliToken === normalizedToken);
 }
 
+/// JWT 的 iss 是否指向本机服务器（localhost/127.0.0.1/::1 或 *.localhost）。
+function isLocallyIssuedSpacetimeToken(token) {
+  try {
+    const payload = String(token).split('.')[1];
+    if (!payload) {
+      return false;
+    }
+    const claims = JSON.parse(
+      Buffer.from(payload, 'base64url').toString('utf8'),
+    );
+    const issuer = String(claims.iss ?? '').trim();
+    if (issuer === 'localhost' || issuer.endsWith('.localhost')) {
+      return true;
+    }
+    if (!issuer) {
+      return false;
+    }
+    const url = new URL(issuer.includes('://') ? issuer : `http://${issuer}`);
+    return ['127.0.0.1', 'localhost', '::1'].includes(url.hostname);
+  } catch {
+    return false;
+  }
+}
+
 function isLoopbackSpacetimeServer(serverUrl) {
   try {
     const url = new URL(serverUrl);
@@ -3544,6 +3579,7 @@ export {
   createWatchConfigs,
   DevRunner,
   isDirectModuleExecution,
+  isLocallyIssuedSpacetimeToken,
   isSpacetimePublishPermissionError,
   isStaleExternalGenerationWorkerProcess,
   normalizeCargoVersionRequirement,
diff --git a/scripts/dev.test.ts b/scripts/dev.test.ts
index fdf6a8efc..e5f7de62b 100644
--- a/scripts/dev.test.ts
+++ b/scripts/dev.test.ts
@@ -30,6 +30,7 @@ import {
   createWatchConfigs,
   DevRunner,
   isDirectModuleExecution,
+  isLocallyIssuedSpacetimeToken,
   isSpacetimePublishPermissionError,
   isStaleExternalGenerationWorkerProcess,
   normalizeCargoVersionRequirement,
@@ -44,6 +45,16 @@ import {
   shouldTrustExistingSpacetimeToken,
 } from './dev.mjs';
 
+/// 造一个带指定 iss 的假 JWT（只用于断言签发者判定）。
+const fakeJwt = (issuer: string): string =>
+  [
+    Buffer.from(JSON.stringify({ alg: 'none' })).toString('base64url'),
+    Buffer.from(JSON.stringify({ iss: issuer, sub: 'fake' })).toString(
+      'base64url',
+    ),
+    'signature',
+  ].join('.');
+
 const originalFetch = globalThis.fetch;
 
 afterEach(() => {
@@ -336,16 +347,13 @@ describe('dev scheduler argument routing', () => {
     }
   });
 
-  test('本地 SpacetimeDB 信任与当前 CLI 一致的 env token', () => {
+  test('本地 SpacetimeDB 信任与当前 CLI 一致且由本机签发的 token', () => {
+    const localToken = fakeJwt('localhost');
     expect(
-      shouldTrustExistingSpacetimeToken(
-        'owner-cli-token',
-        'http://127.0.0.1:3101',
-        {
-          env: {},
-          resolveCliToken: () => 'owner-cli-token',
-        },
-      ),
+      shouldTrustExistingSpacetimeToken(localToken, 'http://127.0.0.1:3101', {
+        env: {},
+        resolveCliToken: () => localToken,
+      }),
     ).toBe(true);
   });
 });
@@ -1834,3 +1842,39 @@ spacetimedb tool version 2.8.3; spacetimedb-lib version 2.8.3;
     }
   });
 });
+
+describe('本地 token 信任判定', () => {
+  it('拒绝远程账号签发的 token 用于本地服务器（曾经的 401 InvalidSignature）', () => {
+    expect(
+      isLocallyIssuedSpacetimeToken(fakeJwt('https://api.spacetimedb.com')),
+    ).toBe(false);
+    expect(isLocallyIssuedSpacetimeToken('not-a-jwt')).toBe(false);
+    expect(
+      shouldTrustExistingSpacetimeToken(
+        fakeJwt('https://api.spacetimedb.com'),
+        'http://127.0.0.1:3101',
+        {
+          env: {},
+          resolveCliToken: () => fakeJwt('https://api.spacetimedb.com'),
+        },
+      ),
+    ).toBe(false);
+  });
+
+  it('接受本机签发的 token', () => {
+    expect(isLocallyIssuedSpacetimeToken(fakeJwt('localhost'))).toBe(true);
+    expect(
+      isLocallyIssuedSpacetimeToken(fakeJwt('http://127.0.0.1:3101')),
+    ).toBe(true);
+    expect(
+      shouldTrustExistingSpacetimeToken(
+        fakeJwt('localhost'),
+        'http://127.0.0.1:3101',
+        {
+          env: {},
+          resolveCliToken: () => fakeJwt('localhost'),
+        },
+      ),
+    ).toBe(true);
+  });
+});