What is the difference between ChengOS and ChengApp?

ChengOS is the workflow and AI agent platform that orchestrates and executes, and it can run on your own servers. ChengApp is its client for Windows and Android. You can use them together or use just one.

How does a phone connect to a desktop?

The phone pairs with a Windows host on the same network by scanning a QR code, then connects directly for messaging, meetings and agent collaboration. Android does not auto-discover; pairing is always by QR code.

What carries a session across networks?

ChengID / Hosted Coordinator. It is a separate communication mode for people and agents that are not on the same network — not a fallback for a failed local link, and not a file data plane.

Can a phone and a desktop transfer files?

Not yet. Same-network direct connections currently cover messaging, meetings and agent collaboration. File transfer will not be claimed here until it is verified end to end.

Which platforms are supported?

Windows and Android clients are available today. Download buttons are driven by the release manifest, so a platform with no asset shows no button. macOS is roadmap only and there is no iOS target.

Yes — over Stdio, SSE and HTTP. Skills can be imported from a written requirement, web or API documentation, Git, an existing SKILL.md, or a ZIP package; imported results still need review.

Can I self-host, and where does the data live?

Native and Docker self-hosting are both supported. When you deploy it yourself, business data stays in your database and the boundary is yours.

Why are there no performance numbers on the site?

Because there is no reproducible benchmark pinned to a version, machine, scenario and date. When one exists, the numbers will be published together with those conditions rather than on their own.

Windows · ChengApp Desktop

Build controllable AI agents with visual workflows

ChengOS orchestrates and executes workflows and agents. ChengApp provides a desktop workspace for Windows, with same-network Android collaboration.

Core Capabilities

From workflow orchestration to desktop collaboration

ChengOS orchestrates and executes. ChengApp connects your local workspace and same-network devices. Four capabilities with clear boundaries.

ChengOS · Orchestration & execution

Multi-agent workflows & decision routing

Connect agents, tools and data flows on a visual canvas. Orchestrate multi-agent collaboration and route tasks through configurable decision branches. Multi-agent meetings support turn-taking, discussion and voting.

Decision providers · ai/decision_branch

Supports Jev, with Laya available through configuration. Jev calls an external API by default. Laya is an operator-managed local service, disabled by default and explicitly enabled by the operator.

Jev / Laya are decision-routing providers, not general-purpose chat models. Meetings do not require their participation.

Actual ChengOS workflow editor showing connected chat input, LLM configuration, AI chat and chat output nodes — Actual product screenshot · ChengOS workflow editor showing node connections and configuration, not the ChengApp desktop interface.

ChengApp · Client-local tools

Local workspace & credential isolation

Use client-local workspace tools in ChengApp to view and edit documents and spreadsheets, and let agents read or modify workspace content. Tools use credential handles; raw API keys stay out of the model context.

Local tools, not a claim of offline inference

Workspace path checks cover Windows junctions, alternate data streams and reserved device names. Model and external-service calls follow their own configuration.

This does not promise zero document uploads or fully offline operation. The ChengOS engine connects to configured Ollama / vLLM services; ChengApp does not bundle local inference.

ChengApp · Windows + Android

Phone & Windows on the same network

Pair an Android phone by QR code and connect directly to a Windows device on the same network, extending messaging, meetings and agent collaboration to your phone.

QR pairing → Direct LAN connection → Collaboration

The phone participates as a client and requires a running ChengOS backend. Messaging, meetings and agent collaboration are the capabilities presented here.

Direct connections after QR pairing require the same network. Cross-network ChengID communication is a separate connection mode.

ChengOS · Backend task execution

Codex / Claude Code task delegation

Delegate bounded coding tasks to Codex or Claude Code through tools/coding_agent_task, making coding tasks part of your workflow.

Execution host · ChengOS backend

Tasks run on the ChengOS backend host, not directly on the Windows client through ChengApp. Claude Code is disabled by default and must be configured and enabled by the operator.

Claude Code uses your own credentials: an Anthropic API key or your own subscription login, never a shared account.

Start by role

Which one are you?

Three paths, each with one clear next step.

Teams working on one network

You want phones and desktops to connect directly on the same network for messaging, meetings and agent tasks.

After QR pairing, a phone connects directly to a Windows host on the same network for messaging, meetings and agent work.

Explore the client

Automation developers

You want repeatable processes expressed as testable, reusable agent workflows.

Visual DAG workflows, ReAct agents and sub-workflows, with MCP over Stdio, SSE and HTTP.

View workflow screenshots (read-only)

Enterprise IT

You need the platform on your own infrastructure, with the data boundary under your control.

Native and Docker self-hosting; whoever deploys the server owns the data boundary.

Read the deployment docs

Read-only showcase

Explore the product interface

These are static screenshots for browsing only. There is no online editor, execution or trial here.

Architecture

Client-Server Architecture

The ChengOS engine runs workflows on the server; ChengApp is the way in from your own devices. They talk over REST and WebSocket.

Backend Engine

ChengOS

Rust

ChengApp · Windows Desktop

Desktop Client

ChengApp · Mobile

Mobile Client

ChengOS

Backend Engine

Rust

High-performance DAG workflow engine: REST + WebSocket API, node & tool sandbox, credential vault isolation, multi-tenant RBAC, vector retrieval, and scheduling. Available hosted, or deployed on your own servers.

ChengApp · Windows Desktop

Desktop Client

Tauri 2 + Rust

Local-first Windows client: custom frameless window, system Keyring credential storage, a local document & spreadsheet workspace, and local multi-agent working sessions. Points at the hosted engine by default, or at your own deployment.

ChengApp · Mobile

Mobile Client

Android

Android client: pair by QR code and connect directly to Windows on the same network for messaging, meetings and agent collaboration. Requires a running ChengOS backend.

Tools

90+ Built-in Node Tools

A rich tool library covering code execution, file management, web scraping, AI multimodal, documents, tables, and system orchestration

Code & Shell Sandbox

code_shell sandboxed Bash execution, code_python for data analysis & scientific computing, code_js for lightweight logic & JSON transforms

File System & Workspace

Read/write/edit/patch/diff/copy/move/delete/backup/rollback/search/validate — a complete file management toolkit

Network & External Integration

HTTP API client, headless browser automation, web search, email send/receive, SSH remote execution, Git repository fetch

AI Inference & Multimodal

LLM invocation, intelligent conditional routing, ReAct agent, image/audio/video generation, ASR, OCR, translation, video processing

Document, Table & RAG

Smart document assembly & block updates, spreadsheet CRUD, RAG knowledge base chunking/vector indexing/context retrieval

System & Orchestration

Cron scheduling, MCP service extension, Skills package execution, sub-workflow nesting, human approval, schema inspection

Multi-Channel Chat

Web UI embedded chat, Telegram, WhatsApp, Slack, WeCom, DingTalk IM integration, H5/PWA responsive interface, CLI terminal

Security & Credential Management

Credential Vault encrypted storage, zero LLM credential contact, sandbox isolation, multi-tenant user_id data isolation

Typical Workflow Diagrams

Document Q&A Flow

Email Assistant Flow

Knowledge Base Search Flow

Download & Deployment

Ready Out of the Box, Native Desktop AI

Download ChengApp or the ChengFlow desktop server for Windows; switch tabs for Linux, Android and OpenWrt builds.

Recommended build

Download for Windows

ChengApp client and ChengFlow desktop server installers

ChengApp

ChengApp_0.3.0_x64-setup.exe

v0.3.0 · 10.5 MB

Download

SHA-256

a21ad4b05569ac2aabaf157f71807339a2742ef2fb2debea7f4b91dac1dfffd4

ChengFlow

ChengFlow_0.3.0_x64_en-US.msi

v0.3.0 · 380.4 MB

Download

SHA-256

d81efa5ec6fad8dfcc35e83bd6b58bbfcdffec9f0ceb4284145879f4b0fb4e59

Verified desktop & collaboration capabilities

After QR pairing, a phone connects directly to a Windows host on the same network for messaging, meetings and agent collaboration
Ready out of the box with an embedded Rust runtime, zero config required
A native Windows client built on Tauri 2, with a dark theme
Re-launching returns to the existing window and can hand its start-up directory to the current workspace
Workspace path validation covers Windows junctions, alternate data streams and reserved device names

Windows Deep Integration

Frameless custom window with a native feel.

Built natively on Rust + Tauri 2

A native client built with Rust and Tauri 2 that runs without installing a separate runtime environment.

Direct links & self-hosting

Devices on the same network connect directly; the server side can be self-hosted natively or with Docker, so the data boundary stays with whoever deploys it.

Free Out-of-the-Box

Download and run immediately. Completely free for both personal and daily business office productivity.

Frequently asked questions

: ChengOS is the workflow and AI agent platform that orchestrates and executes, and it can run on your own servers. ChengApp is its client for Windows and Android. You can use them together or use just one.
: The phone pairs with a Windows host on the same network by scanning a QR code, then connects directly for messaging, meetings and agent collaboration. Android does not auto-discover; pairing is always by QR code.
: ChengID / Hosted Coordinator. It is a separate communication mode for people and agents that are not on the same network — not a fallback for a failed local link, and not a file data plane.
: Not yet. Same-network direct connections currently cover messaging, meetings and agent collaboration. File transfer will not be claimed here until it is verified end to end.
: Windows and Android clients are available today. Download buttons are driven by the release manifest, so a platform with no asset shows no button. macOS is roadmap only and there is no iOS target.
: Yes — over Stdio, SSE and HTTP. Skills can be imported from a written requirement, web or API documentation, Git, an existing SKILL.md, or a ZIP package; imported results still need review.
: Native and Docker self-hosting are both supported. When you deploy it yourself, business data stays in your database and the boundary is yours.
: Because there is no reproducible benchmark pinned to a version, machine, scenario and date. When one exists, the numbers will be published together with those conditions rather than on their own.