diff --git a/src/backend/src/filesystem/batch/BatchExecutor.js b/src/backend/src/filesystem/batch/BatchExecutor.js
index 062766a6d..5229fc7f8 100644
--- a/src/backend/src/filesystem/batch/BatchExecutor.js
+++ b/src/backend/src/filesystem/batch/BatchExecutor.js
@@ -22,7 +22,7 @@ const commands = require('./commands').commands;
 const APIError = require('../../api/APIError');
 const { Context } = require('../../util/context');
 const config = require('../../config');
-const { TeePromise } = require('../../util/promise');
+const { TeePromise } = require('@heyputer/putility');
 const { WorkUnit } = require('../../modules/core/lib/expect');
 
 class BatchExecutor extends AdvancedBase {
diff --git a/src/backend/src/filesystem/hl_operations/hl_write.js b/src/backend/src/filesystem/hl_operations/hl_write.js
index c0f711014..dc78996e6 100644
--- a/src/backend/src/filesystem/hl_operations/hl_write.js
+++ b/src/backend/src/filesystem/hl_operations/hl_write.js
@@ -23,7 +23,7 @@ const StringParam = require("../../api/filesystem/StringParam");
 const UserParam = require("../../api/filesystem/UserParam");
 const config = require("../../config");
 const { chkperm, validate_fsentry_name } = require("../../helpers");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require("@heyputer/putility").libs.promise;
 const { pausing_tee, logging_stream, offset_write_stream, stream_to_the_void } = require("../../util/streamutil");
 const { TYPE_DIRECTORY } = require("../FSNodeContext");
 const { LLRead } = require("../ll_operations/ll_read");
diff --git a/src/backend/src/fun/dev-console-ui-utils.js b/src/backend/src/fun/dev-console-ui-utils.js
index 102370a1a..27c5392b7 100644
--- a/src/backend/src/fun/dev-console-ui-utils.js
+++ b/src/backend/src/fun/dev-console-ui-utils.js
@@ -17,7 +17,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const config = require('../config');
-const { TeePromise } = require('../util/promise');
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 const es_import_promise = new TeePromise();
 let stringLength;
diff --git a/src/backend/src/modules/puterai/ClaudeService.js b/src/backend/src/modules/puterai/ClaudeService.js
index b211928a9..36f05cebf 100644
--- a/src/backend/src/modules/puterai/ClaudeService.js
+++ b/src/backend/src/modules/puterai/ClaudeService.js
@@ -5,7 +5,7 @@ const { whatis } = require("../../util/langutil");
 const { PassThrough } = require("stream");
 const { TypedValue } = require("../../services/drivers/meta/Runtime");
 const APIError = require("../../api/APIError");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 const PUTER_PROMPT = `
     You are running on an open-source platform called Puter,
diff --git a/src/backend/src/modules/puterai/GroqAIService.js b/src/backend/src/modules/puterai/GroqAIService.js
index 010d0f251..454aad74a 100644
--- a/src/backend/src/modules/puterai/GroqAIService.js
+++ b/src/backend/src/modules/puterai/GroqAIService.js
@@ -3,7 +3,7 @@ const { PassThrough } = require("stream");
 const BaseService = require("../../services/BaseService");
 const { TypedValue } = require("../../services/drivers/meta/Runtime");
 const { nou } = require("../../util/langutil");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 
 /**
diff --git a/src/backend/src/modules/puterai/MistralAIService.js b/src/backend/src/modules/puterai/MistralAIService.js
index fc7302653..ccca80fbd 100644
--- a/src/backend/src/modules/puterai/MistralAIService.js
+++ b/src/backend/src/modules/puterai/MistralAIService.js
@@ -5,7 +5,7 @@ const { TypedValue } = require("../../services/drivers/meta/Runtime");
 const { nou } = require("../../util/langutil");
 
 const axios = require('axios');
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 
 /**
diff --git a/src/backend/src/modules/puterai/OpenAICompletionService.js b/src/backend/src/modules/puterai/OpenAICompletionService.js
index 19c0e2e60..881cd7f62 100644
--- a/src/backend/src/modules/puterai/OpenAICompletionService.js
+++ b/src/backend/src/modules/puterai/OpenAICompletionService.js
@@ -6,7 +6,7 @@ const { TypedValue } = require('../../services/drivers/meta/Runtime');
 const { Context } = require('../../util/context');
 const SmolUtil = require('../../util/smolutil');
 const { nou } = require('../../util/langutil');
-const { TeePromise } = require('../../util/promise');
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 
 /**
diff --git a/src/backend/src/modules/puterai/TogetherAIService.js b/src/backend/src/modules/puterai/TogetherAIService.js
index 9747cafde..6ca2967b8 100644
--- a/src/backend/src/modules/puterai/TogetherAIService.js
+++ b/src/backend/src/modules/puterai/TogetherAIService.js
@@ -3,7 +3,7 @@ const { PassThrough } = require("stream");
 const BaseService = require("../../services/BaseService");
 const { TypedValue } = require("../../services/drivers/meta/Runtime");
 const { nou } = require("../../util/langutil");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 
 /**
diff --git a/src/backend/src/modules/puterai/XAIService.js b/src/backend/src/modules/puterai/XAIService.js
index cead87281..58e5c9290 100644
--- a/src/backend/src/modules/puterai/XAIService.js
+++ b/src/backend/src/modules/puterai/XAIService.js
@@ -4,7 +4,7 @@ const BaseService = require("../../services/BaseService");
 const { whatis, nou } = require("../../util/langutil");
 const { PassThrough } = require("stream");
 const { TypedValue } = require("../../services/drivers/meta/Runtime");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 const PUTER_PROMPT = `
     You are running on an open-source platform called Puter,
diff --git a/src/backend/src/modules/selfhosted/DefaultUserService.js b/src/backend/src/modules/selfhosted/DefaultUserService.js
index a0de195f4..774d6cc78 100644
--- a/src/backend/src/modules/selfhosted/DefaultUserService.js
+++ b/src/backend/src/modules/selfhosted/DefaultUserService.js
@@ -22,7 +22,7 @@ const { NodePathSelector } = require("../../filesystem/node/selectors");
 const { surrounding_box } = require("../../fun/dev-console-ui-utils");
 const { get_user, invalidate_cached_user } = require("../../helpers");
 const { Context } = require("../../util/context");
-const { asyncSafeSetInterval } = require("../../util/promise");
+const { asyncSafeSetInterval } = require('@heyputer/putility').libs.promise;
 const { buffer_to_stream } = require("../../util/streamutil");
 const BaseService = require("../../services/BaseService");
 const { Actor, UserActorType } = require("../../services/auth/Actor");
diff --git a/src/backend/src/routers/drivers/call.js b/src/backend/src/routers/drivers/call.js
index 9e472d7a2..f0453b995 100644
--- a/src/backend/src/routers/drivers/call.js
+++ b/src/backend/src/routers/drivers/call.js
@@ -23,7 +23,7 @@ const { TypeSpec } = require("../../services/drivers/meta/Construct");
 const { TypedValue } = require("../../services/drivers/meta/Runtime");
 const { Context } = require("../../util/context");
 const { whatis } = require("../../util/langutil");
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { valid_file_size } = require("../../util/validutil");
 
 let _handle_multipart;
diff --git a/src/backend/src/routers/filesystem_api/batch/all.js b/src/backend/src/routers/filesystem_api/batch/all.js
index 2bcf594d6..96dccdf16 100644
--- a/src/backend/src/routers/filesystem_api/batch/all.js
+++ b/src/backend/src/routers/filesystem_api/batch/all.js
@@ -23,7 +23,7 @@ const PathResolver = require("./PathResolver");
 const { Context } = require("../../../util/context");
 const Busboy = require('busboy');
 const { BatchExecutor } = require("../../../filesystem/batch/BatchExecutor");
-const { TeePromise } = require("../../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { EWMA, MovingMode } = require("../../../util/opmath");
 const { get_app } = require('../../../helpers');
 const { valid_file_size } = require("../../../util/validutil");
diff --git a/src/backend/src/routers/filesystem_api/write.js b/src/backend/src/routers/filesystem_api/write.js
index de0f4f65b..df4d1366b 100644
--- a/src/backend/src/routers/filesystem_api/write.js
+++ b/src/backend/src/routers/filesystem_api/write.js
@@ -23,7 +23,7 @@ const { HLWrite } = require('../../filesystem/hl_operations/hl_write.js');
 const { boolify } = require('../../util/hl_types.js');
 const { Context } = require('../../util/context.js');
 const Busboy = require('busboy');
-const { TeePromise } = require('../../util/promise.js');
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const APIError = require('../../api/APIError.js');
 const { valid_file_size } = require('../../util/validutil.js');
 
diff --git a/src/backend/src/services/AppInformationService.js b/src/backend/src/services/AppInformationService.js
index c38be268c..d82c163b3 100644
--- a/src/backend/src/services/AppInformationService.js
+++ b/src/backend/src/services/AppInformationService.js
@@ -17,7 +17,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-const { asyncSafeSetInterval } = require("../util/promise");
+const { asyncSafeSetInterval } = require('@heyputer/putility').libs.promise;
 const { MINUTE, SECOND } = require("@heyputer/putility").libs.time;
 const { origin_from_url } = require("../util/urlutil");
 const { DB_READ } = require("./database/consts");
diff --git a/src/backend/src/services/Container.js b/src/backend/src/services/Container.js
index c3500be8c..ec82c72a6 100644
--- a/src/backend/src/services/Container.js
+++ b/src/backend/src/services/Container.js
@@ -21,7 +21,7 @@ const { AdvancedBase } = require("@heyputer/putility");
 const config = require("../config");
 const { Context } = require("../util/context");
 const { CompositeError } = require("../util/errorutil");
-const { TeePromise } = require("../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 // 17 lines of code instead of an entire dependency-injection framework
 /**
diff --git a/src/backend/src/services/LocalDiskStorageService.js b/src/backend/src/services/LocalDiskStorageService.js
index 464b64fa1..a9d01080e 100644
--- a/src/backend/src/services/LocalDiskStorageService.js
+++ b/src/backend/src/services/LocalDiskStorageService.js
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { LocalDiskStorageStrategy } = require("../filesystem/strategies/storage_a/LocalDiskStorageStrategy");
-const { TeePromise } = require("../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { progress_stream, size_limit_stream } = require("../util/streamutil");
 const BaseService = require("./BaseService");
 
diff --git a/src/backend/src/services/NotificationService.js b/src/backend/src/services/NotificationService.js
index 76edcb2b0..99905e636 100644
--- a/src/backend/src/services/NotificationService.js
+++ b/src/backend/src/services/NotificationService.js
@@ -20,7 +20,7 @@
 const APIError = require("../api/APIError");
 const auth2 = require("../middleware/auth2");
 const { Endpoint } = require("../util/expressutil");
-const { TeePromise } = require("../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const BaseService = require("./BaseService");
 const { DB_WRITE } = require("./database/consts");
 
diff --git a/src/backend/src/services/SUService.js b/src/backend/src/services/SUService.js
index 0a7bb6322..c085c3a06 100644
--- a/src/backend/src/services/SUService.js
+++ b/src/backend/src/services/SUService.js
@@ -1,7 +1,7 @@
 // METADATA // {"ai-commented":{"service":"openai-completion","model":"gpt-4o-mini"}}
 const { get_user } = require("../helpers");
 const { Context } = require("../util/context");
-const { TeePromise } = require("../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { Actor, UserActorType } = require("./auth/Actor");
 const BaseService = require("./BaseService");
 
diff --git a/src/backend/src/services/SessionService.js b/src/backend/src/services/SessionService.js
index a083426ba..551d7380f 100644
--- a/src/backend/src/services/SessionService.js
+++ b/src/backend/src/services/SessionService.js
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { invalidate_cached_user, get_user } = require("../helpers");
-const { asyncSafeSetInterval } = require("../util/promise");
+const { asyncSafeSetInterval } = require('@heyputer/putility').libs.promise;
 const { MINUTE, SECOND } = require("@heyputer/putility").libs.time;
 const BaseService = require("./BaseService");
 const { DB_WRITE } = require("./database/consts");
diff --git a/src/backend/src/services/abuse-prevention/EdgeRateLimitService.js b/src/backend/src/services/abuse-prevention/EdgeRateLimitService.js
index bb4809950..8d374dac3 100644
--- a/src/backend/src/services/abuse-prevention/EdgeRateLimitService.js
+++ b/src/backend/src/services/abuse-prevention/EdgeRateLimitService.js
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { Context } = require("../../util/context");
-const { asyncSafeSetInterval } = require("../../util/promise");
+const { asyncSafeSetInterval } = require('@heyputer/putility').libs.promise;
 const { quot } = require('@heyputer/putility').libs.string;
 
 const { MINUTE, HOUR } = require('@heyputer/putility').libs.time;
diff --git a/src/backend/src/services/fs/FSLockService.js b/src/backend/src/services/fs/FSLockService.js
index e787a5c62..aeffff590 100644
--- a/src/backend/src/services/fs/FSLockService.js
+++ b/src/backend/src/services/fs/FSLockService.js
@@ -18,7 +18,6 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { RWLock } = require("../../util/lockutil");
-const { TeePromise } = require("../../util/promise");
 const BaseService = require("../BaseService");
 
 // Constant representing the read lock mode used for distinguishing between read and write operations.
diff --git a/src/backend/src/services/runtime-analysis/ServerHealthService.js b/src/backend/src/services/runtime-analysis/ServerHealthService.js
index c64dbbd17..34fadf8b7 100644
--- a/src/backend/src/services/runtime-analysis/ServerHealthService.js
+++ b/src/backend/src/services/runtime-analysis/ServerHealthService.js
@@ -18,9 +18,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const BaseService = require("../BaseService");
-const { SECOND } = require("@heyputer/putility").libs.time;
+const { time, promise } = require("@heyputer/putility").libs;
 const { parse_meminfo } = require("../../util/linux");
-const { asyncSafeSetInterval, TeePromise } = require("../../util/promise");
 
 
 /**
@@ -135,11 +134,11 @@ class ServerHealthService extends BaseService {
         * @param {none} - No parameters are passed to this method.
         * @returns {void}
         */
-        asyncSafeSetInterval(async () => {
+        promise.asyncSafeSetInterval(async () => {
             this.log.tick('service checks');
             const check_failures = [];
             for ( const { name, fn, chainable } of this.checks_ ) {
-                const p_timeout = new TeePromise();
+                const p_timeout = new promise.TeePromise();
                 /**
                 * Creates a TeePromise to handle potential timeouts during health checks.
                 * 
@@ -147,7 +146,7 @@ class ServerHealthService extends BaseService {
                 */
                 const timeout = setTimeout(() => {
                     p_timeout.reject(new Error('Health check timed out'));
-                }, 5 * SECOND);
+                }, 5 * time.SECOND);
                 try {
                     await Promise.race([
                         fn(),
@@ -180,7 +179,7 @@ class ServerHealthService extends BaseService {
             }
 
             this.failures_ = check_failures;
-        }, 10 * SECOND, null, {
+        }, 10 * time.SECOND, null, {
             onBehindSchedule: (drift) => {
                 svc_alarm.create(
                     'health-checks-behind-schedule',
diff --git a/src/backend/src/services/thumbnails/HTTPThumbnailService.js b/src/backend/src/services/thumbnails/HTTPThumbnailService.js
index 2ce892377..b4a6dd4d5 100644
--- a/src/backend/src/services/thumbnails/HTTPThumbnailService.js
+++ b/src/backend/src/services/thumbnails/HTTPThumbnailService.js
@@ -22,7 +22,7 @@
 
 const axios = require('axios');
 
-const { TeePromise } = require("../../util/promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { AdvancedBase } = require('@heyputer/putility');
 const FormData = require("form-data");
 const { stream_to_the_void, buffer_to_stream } = require('../../util/streamutil');
diff --git a/src/backend/src/traits/SyncFeature.js b/src/backend/src/traits/SyncFeature.js
index b88c5ca43..633521cd9 100644
--- a/src/backend/src/traits/SyncFeature.js
+++ b/src/backend/src/traits/SyncFeature.js
@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-const { Lock } = require("../util/promise");
+const { Lock } = require('@heyputer/putility').libs.promise;
 
 class SyncFeature {
     constructor (method_include_list) {
diff --git a/src/backend/src/util/lockutil.js b/src/backend/src/util/lockutil.js
index b0862600e..dde83572b 100644
--- a/src/backend/src/util/lockutil.js
+++ b/src/backend/src/util/lockutil.js
@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-const { TeePromise } = require("./promise");
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 class RWLock {
     static TYPE_READ = Symbol('read');
diff --git a/src/backend/src/util/otelutil.js b/src/backend/src/util/otelutil.js
index ecebdb469..e8aef304f 100644
--- a/src/backend/src/util/otelutil.js
+++ b/src/backend/src/util/otelutil.js
@@ -23,7 +23,7 @@
 
 const { context, trace, SpanStatusCode } = require('@opentelemetry/api');
 const { Context } = require('./context');
-const { TeePromise } = require('./promise');
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 
 /*
 parallel span example from GPT-4:
diff --git a/src/backend/src/util/promise.js b/src/backend/src/util/promise.js
deleted file mode 100644
index 137b19c37..000000000
--- a/src/backend/src/util/promise.js
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Copyright (C) 2024 Puter Technologies Inc.
- *
- * This file is part of Puter.
- *
- * Puter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published
- * by the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-class TeePromise {
-    static STATUS_PENDING = Symbol('pending');
-    static STATUS_RUNNING = {};
-    static STATUS_DONE = Symbol('done');
-    constructor () {
-        this.status_ = this.constructor.STATUS_PENDING;
-        this.donePromise = new Promise((resolve, reject) => {
-            this.doneResolve = resolve;
-            this.doneReject = reject;
-        });
-    }
-    get status () {
-        return this.status_;
-    }
-    set status (status) {
-        this.status_ = status;
-        if ( status === this.constructor.STATUS_DONE ) {
-            this.doneResolve();
-        }
-    }
-    resolve (value) {
-        this.status_ = this.constructor.STATUS_DONE;
-        this.doneResolve(value);
-    }
-    awaitDone () {
-        return this.donePromise;
-    }
-    then (fn, ...a) {
-        return this.donePromise.then(fn, ...a);
-    }
-
-    reject (err) {
-        this.status_ = this.constructor.STATUS_DONE;
-        this.doneReject(err);
-    }
-
-    /**
-     * @deprecated use then() instead
-     */
-    onComplete(fn) {
-        return this.then(fn);
-    }
-}
-
-class Lock {
-    constructor() {
-        this._locked = false;
-        this._waiting = [];
-    }
-
-    async acquire(callback) {
-        await new Promise(resolve => {
-            if ( ! this._locked ) {
-                this._locked = true;
-                resolve();
-            } else {
-                this._waiting.push({
-                    resolve,
-                });
-            }
-        })
-        if ( callback ) {
-            let retval;
-            try {
-                retval = await callback();
-            } finally {
-                this.release();
-            }
-            return retval;
-        }
-    }
-
-    release() {
-        if (this._waiting.length > 0) {
-            const { resolve } = this._waiting.shift();
-            resolve();
-        } else {
-            this._locked = false;
-        }
-    }
-}
-
-/**
- * @callback behindScheduleCallback
- * @param {number} drift - The number of milliseconds that the callback was
- *    called behind schedule.
- * @returns {boolean} - If the callback returns true, the timer will be
- *   cancelled.
- */
-
-/**
- * When passing an async callback to setInterval, it's possible for the
- * callback to be called again before the previous invocation has finished.
- *
- * This function wraps setInterval and ensures that the callback is not
- * called again until the previous invocation has finished.
- *
- * @param {Function} callback - The function to call when the timer elapses.
- * @param {number} delay - The minimum number of milliseconds between invocations.
- * @param {?Array<any>} args - Additional arguments to pass to setInterval.
- * @param {?Object} options - Additional options.
- * @param {behindScheduleCallback} options.onBehindSchedule - A callback to call when the callback is called behind schedule.
- */
-const asyncSafeSetInterval = async (callback, delay, args, options) => {
-    args = args ?? [];
-    options = options ?? {};
-    const { onBehindSchedule } = options;
-
-    const sleep = (ms) => new Promise(rslv => setTimeout(rslv, ms));
-
-    for ( ;; ) {
-        await sleep(delay);
-
-        const ts_start = Date.now();
-        await callback(...args);
-        const ts_end = Date.now();
-
-        const runtime = ts_end - ts_start;
-        const sleep_time = delay - runtime;
-
-        if ( sleep_time < 0 ) {
-            if ( onBehindSchedule ) {
-                const cancel = await onBehindSchedule(-sleep_time);
-                if ( cancel ) {
-                    return;
-                }
-            }
-        } else {
-            await sleep(sleep_time);
-        }
-    }
-}
-
-module.exports = {
-    TeePromise,
-    Lock,
-    asyncSafeSetInterval,
-};
diff --git a/src/backend/src/util/streamutil.js b/src/backend/src/util/streamutil.js
index 2f75f8fb2..bd06b7af0 100644
--- a/src/backend/src/util/streamutil.js
+++ b/src/backend/src/util/streamutil.js
@@ -17,7 +17,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 const { PassThrough, Readable, Transform } = require('stream');
-const { TeePromise } = require('./promise');
+const { TeePromise } = require('@heyputer/putility').libs.promise;
 const { EWMA } = require('./opmath');
 
 class StreamBuffer extends TeePromise {