Nexus is neither an AI Agent, nor a Planner or Reasoner.
Nexus is the Universal MCP Execution Bridge and local physical Agent Harness purpose-built for ChatGPT Web (chatgpt.com) (with broader WebAI platform support coming in future updates).
It bridges the gap between cloud LLM cognition and your physical OS with deterministic local execution.
Modern Web AI (such as ChatGPT Web) excels at intent understanding and reasoning, yet remains trapped inside browser sandboxes.
Conflating the "Planner" with the "Executor" leads to unverified hallucinations, broken environments, and irreversible state pollution.
Strict three-tier separation decouples cloud AI cognition from your local operating system, eliminating privilege creep and state pollution.
Deeply integrated with ChatGPT Web (chatgpt.com), with additional WebAI platforms coming soon. Handles intent parsing, multi-step planning, and replanning.
Standardized Model Context Protocol (JSON-RPC 2.0) handling tool registration manifests, schema validation, and bidirectional streaming.
Runs natively on your machine with Tool Registry, isolated Runner processes, Action Ledger WAL, and OS state introspectors.
Comprehensive physical control over your local environment. Every capability enforces strict JSON Schema validation and verifiable execution receipts.
HWND window enumeration, normalized mouse actions, low-level keyboard input, multi-monitor awareness, and physical screen capture.
Canonical realpath anti-jailbreak resolution (fs.realpathSync.native), atomic writes, SHA-256 integrity checks, and directory watching.
Windows JobObject hardware sandboxing, hard memory caps, timeout circuit-breakers, bidirectional stdio streaming, and safe env injection.
Headless and headed control via Chromium DevTools Protocol (CDP), deep DOM evaluation, network interception, and session persistence.
Drive Blender 3D, Microsoft Office, CAD suites, and any native Win32/WinRT desktop application pipeline programmatically.
Precision-typeset DOCX official documents, vector PDF rendering, and multi-sheet Excel workbook formula & chart generation.
Action Ledger Write-Ahead Logging (WAL), Checkpoint snapshot/restore, Durable Execution state machine, idempotency deduplication, and physical ground-truth auditing.
Every local invocation records an immutable receipt in SQLite WAL.
Even across sudden OS power loss or process crashes, Nexus recovers deterministically with zero duplicate side effects.
Before triggering any physical OS mutation (writing files, spawning processes, dispatching input), Nexus commits a prepared intent entry with an Idempotency Key to its local WAL ledger—and seals it with exit codes, SHA-256 hashes, and HWND handles upon completion.
If a child process crashes or the host machine reboots mid-task, the watchdog inspects the WAL ledger. Rather than blindly re-running commands, Nexus introspects physical OS state first (checking disk hashes and active handles) before committing or rolling back safely.
Plug-and-play MCP gateway integration for engineering teams, backed by hardware-enforced local privacy and sandbox isolation.
No expensive API token bills required. Connects directly to your existing ChatGPT Web session over local loopback HTTP/SSE & Stdio to execute real desktop workflows.
Extend BaseProvider and register a JSON Tool Schema to plug proprietary hardware, industrial controllers, or internal software pipelines into the Nexus matrix.
Every file operation is guarded by canonical path verification and allowlists, child processes are isolated in Windows JobObjects, and secrets are encrypted via DPAPI.
Follow the 6 steps below to bridge ChatGPT Web directly to your local machine in minutes.
.exe / .msi, macOS Apple Silicon .dmg, Linux .deb / .AppImage), or build from source:
tunnel_abc123...).Read-Only, Write-Only, Read & Write, Execute, or Full Control), or tick Read / Write / Execute individually.http://127.0.0.1:18080/mcp.
Direct, System Proxy (auto-detected), or Custom Proxy, depending on your network.chatgpt.com, open the Plugins page:
read-only access and safe-only execution, then relax permissions per project as you get comfortable.Equip your ChatGPT Web workflow with deterministic local OS execution. Available natively for Windows 10/11, macOS Apple Silicon, and Linux.