diff --git a/assets/custom/Json/level2060.json.meta b/assets/custom/Json/level2060.json.meta
new file mode 100644
index 00000000..7b05e3d0
--- /dev/null
+++ b/assets/custom/Json/level2060.json.meta
@@ -0,0 +1,6 @@
+{
+  "ver": "1.0.2",
+  "uuid": "5f7a5510-f770-43bd-9389-91eba6e1d7a2",
+  "importer": "json",
+  "subMetas": {}
+}
\ No newline at end of file
diff --git a/build-templates/wechatgame/game.js b/build-templates/wechatgame/game.js
index dabcdd25..3797a4b8 100644
--- a/build-templates/wechatgame/game.js
+++ b/build-templates/wechatgame/game.js
@@ -1,6 +1,8 @@
 "use strict";
 
-const memoryDiagnostics = require('./memory-diagnostics').create(wx, require('./memory-diagnostics-build'));
+// Opt in only when collecting diagnostics; release builds remain disabled.
+const MEMORY_DIAGNOSTICS_ENABLED = false;
+const memoryDiagnostics = require('./memory-diagnostics').create(wx, require('./memory-diagnostics-build'), MEMORY_DIAGNOSTICS_ENABLED);
 memoryDiagnostics.beforeBoot(startGame);
 
 function startGame() {
diff --git a/build-templates/wechatgame/memory-diagnostics.js b/build-templates/wechatgame/memory-diagnostics.js
index ecd35930..ee6f81df 100644
--- a/build-templates/wechatgame/memory-diagnostics.js
+++ b/build-templates/wechatgame/memory-diagnostics.js
@@ -7,7 +7,8 @@ const UPLOAD_URL = 'https://sor779u2w8.sealoshzh.site/memoryDiagnostics';
 const FILE = /^(\d{13}-[a-z0-9]{8})\.(start|0|1)\.jsonl$/;
 const noop = { enabled: false, record() {}, attachEngine() {}, beforeBoot(next) { next(); }, exportPrevious(next) { if (next) next(); } };
 
-function create(wx, build) {
+function create(wx, build, enabled = false) {
+    if (enabled !== true) return noop;
     build = build || {};
     let account;
     try { account = wx.getAccountInfoSync().miniProgram; } catch (_) { return noop; }
diff --git a/tools/test-memory-diagnostics.cjs b/tools/test-memory-diagnostics.cjs
index 1060c375..2030df40 100644
--- a/tools/test-memory-diagnostics.cjs
+++ b/tools/test-memory-diagnostics.cjs
@@ -2,7 +2,7 @@ const test = require('node:test'), assert = require('node:assert/strict');
 const fs = require('node:fs'), vm = require('node:vm');
 const source = fs.readFileSync('build-templates/wechatgame/memory-diagnostics.js', 'utf8');
 const ROOT = '/user/memory-diagnostics/';
-function fixture(files = new Map(), envVersion = 'trial', now = 1800000000000, initiallyFull = false) {
+function fixture(files = new Map(), envVersion = 'trial', now = 1800000000000, initiallyFull = false, enabled = true) {
     const handlers = {}, timers = [], modals = [], sheets = [], calls = [], logins = [], requests = [], timeouts = new Map();
     let timeoutId = 0;
     let failWrite = initiallyFull;
@@ -30,7 +30,7 @@ function fixture(files = new Map(), envVersion = 'trial', now = 1800000000000, i
     const module = { exports: {} };
     vm.runInNewContext(source, { module, Date: Clock, setInterval: fn => { timers.push(fn); return timers.length; }, clearInterval: id => { timers[id - 1] = null; },
         setTimeout: fn => { timeouts.set(++timeoutId, fn); return timeoutId; }, clearTimeout: id => timeouts.delete(id) });
-    const api = module.exports.create(wx, { id: 'build-123', builtAt: '2026-10-26', flags: { iOSHighPerformance: true, 'iOSHighPerformance+': true } });
+    const api = module.exports.create(wx, { id: 'build-123', builtAt: '2026-10-26', flags: { iOSHighPerformance: true, 'iOSHighPerformance+': true } }, enabled);
     const rows = () => [...files.values()].flatMap(s => s.split('\n').filter(Boolean).flatMap(line => { try { return [JSON.parse(line)]; } catch (_) { return []; } }));
     return { api, wx, files, handlers, timers, modals, sheets, calls, rows, logins, requests, timeouts,
         full() { failWrite = true; }, advance(ms) { now += ms; }, tick() { now += 5000; timers.filter(Boolean).forEach(fn => fn()); } };
@@ -66,6 +66,28 @@ function fakeEngine() {
         Director: { EVENT_BEFORE_SCENE_LOADING: 'load', EVENT_BEFORE_SCENE_LAUNCH: 'before', EVENT_AFTER_SCENE_LAUNCH: 'after', EVENT_AFTER_UPDATE: 'frame' }, find: () => null };
     return { cc, events, calls, Bundle };
 }
+test('diagnostics default to off before accessing WeChat APIs', () => {
+    const module = { exports: {} };
+    vm.runInNewContext(source, { module });
+    const wx = new Proxy({}, { get() { throw Error('WeChat API accessed while disabled'); } });
+    for (const enabled of [undefined, false, null, 0, 1, 'true']) {
+        assert.equal(module.exports.create(wx, {}, enabled).enabled, false);
+    }
+    assert.equal(module.exports.create(wx).enabled, false);
+});
+test('master switch disables diagnostics in every channel without side effects', () => {
+    for (const env of ['develop', 'trial', 'release']) {
+        const files = new Map([[ROOT + '1800000000000-abcdefgh.start.jsonl', '{"event":"session.start"}\n']]);
+        const before = [...files];
+        const f = fixture(files, env, 1800000010000, false, false), e = fakeEngine(), original = e.Bundle.prototype.load;
+        let launched = 0, exported = 0;
+        f.api.attachEngine(e.cc); f.api.record('x'); f.api.beforeBoot(() => launched++); f.api.exportPrevious(() => exported++);
+        assert.equal(f.api.enabled, false); assert.equal(launched, 1); assert.equal(exported, 1);
+        assert.equal(e.Bundle.prototype.load, original); assert.deepEqual([...files], before);
+        for (const entries of [f.calls, f.timers, f.modals, f.sheets, f.logins, f.requests, Object.keys(f.handlers), Object.keys(e.events)]) assert.equal(entries.length, 0);
+        assert.equal(f.timeouts.size, 0);
+    }
+});
 test('release/unknown/unavailable channel performs no persistence, listeners, timers or engine patching', () => {
     for (const env of ['release', null, 'unknown', 'throws']) {
         const f = fixture(new Map(), env), e = fakeEngine(), original = e.Bundle.prototype.load;
@@ -349,7 +371,10 @@ test('bootstrap keeps the recovery prompt before adapter/engine initialization a
     const boot = fs.readFileSync('build-templates/wechatgame/game.js', 'utf8');
     const calls = [], context = { wx: {}, window: { boot: () => calls.push('boot') }, cc: { view: {}, sys: { platform: 1, WECHAT_GAME_SUB: 2 }, macro: {} },
         requirePlugin: () => calls.push('engine'), __globalAdapter: { init() {}, adaptEngine() {} },
-        require: name => name === './memory-diagnostics' ? { create: () => ({ enabled: false, beforeBoot: next => { context.resume = next; }, attachEngine() {} }) } : {} };
+        require: name => name === './memory-diagnostics' ? { create: (wx, build, enabled) => {
+            assert.equal(enabled, false);
+            return { enabled: false, beforeBoot: next => { context.resume = next; }, attachEngine() {} };
+        } } : {} };
     vm.runInNewContext(boot, context); assert.deepEqual(calls, []); context.resume(); assert.deepEqual(calls, ['engine', 'boot']);
     assert(boot.includes('window.boot();'));
 });