Is Smoke Monkey an AI model?

No. Smoke Monkey is not an LLM. It is an embeddable, framework-agnostic runtime that turns LLMs (NVIDIA, Gemini, OpenAI, Claude, Ollama) into autonomous engineering agents capable of multi-step planning, calling tools, editing files, and running test loops with zero runtime dependencies.

Do I need a database (Postgres, SQLite, or Redis)?

No database is required. State is persisted through lean session files on disk, or you can plug in your own custom storage adapter. You can deploy it as a CLI, a desktop app, or inside a serverless function without provisioning a database.

How does human-in-the-loop permission gating work?

Smoke Monkey comes with three permission policies: allow-all, deny-all, and ask-default (or a custom function resolver). When a sensitive tool like edit_file or run_command is called under "ask", the runtime emits a permission.required event, pausing execution until your code or UI calls agent.resolvePermission(id, "allow" | "deny").

How does the Model Context Protocol (MCP) server work?

Smoke Monkey ships an official stdio MCP server in smoke-monkey-harness-mcp. Point Claude Code, Cursor, Codex, or opencode at it using npx -y smoke-monkey-harness-mcp to let other AI tools plan, scaffold, verify, and run agents using Smoke Monkey automatically.

What are SKILL.md skills and how do they prevent context bloat?

Skills are directories containing a SKILL.md workflow file. The system prompt only includes a one-line catalog of available skills. When a task requires specialized expertise (e.g. frontend-ui-engineering, test-driven-development, or security-hardening), the agent calls use_skill to load instructions just-in-time, saving thousands of tokens.

What is an AI Agent Harness?

An AI agent harness is the execution environment that bridges raw Large Language Models (LLMs) to real-world software engineering capabilities. While an LLM generates tokens, an AI harness manages deterministic phase loops (explore, plan, edit, verify, recover), tool execution sandboxing, token budget compaction, and safety gates needed for autonomous problem-solving.

What makes Smoke Monkey an Agentic AI runtime rather than a simple wrapper?

Unlike basic prompt-response chains, Smoke Monkey implements true agentic AI architecture: a deterministic 6-phase state machine with automatic failure recovery, runaway loop guards, 24 built-in developer tools, dynamic subcontext isolation, and interactive human-in-the-loop permission pauses.

Is Smoke Monkey Harness 100% Open Source AI?

Yes. Smoke Monkey Harness is 100% open source under the permissive MIT license with zero runtime dependencies. There is no telemetry lock-in, no mandatory cloud backend, and no database requirement—giving engineering teams complete sovereignty over their agent code.

What Agent APIs does Smoke Monkey Harness provide?

Smoke Monkey provides composable TypeScript Agent APIs: createAgent() for initialization, agent.run() for multi-turn execution, agent.on() for fine-grained lifecycle and streaming events, agent.resolvePermission() for interactive human authorization, subcontext switching APIs, and stdio Model Context Protocol (MCP) server endpoints.

Can I run completely offline without API keys?

Yes! Smoke Monkey natively supports Ollama out of the box. Set provider: "ollama" and model: "qwen3:8b" with workspacePath, and the agent will run locally on your machine with zero external network requests.

Architecture

6 min readUpdated: October 2026

Zero-Dependency AI Agent Runtime: Why Lean Harnesses Outperform Heavy Frameworks

Heavy AI frameworks with hundreds of dependencies create maintenance nightmares, bloated Docker containers, and security risks. Smoke Monkey Harness proves that a complete, production-grade agentic AI runtime can be built using purely Node.js standard libraries.

Technical Review: Smoke Monkey Core Architecture Team

|Tested on Node.js 18+ & Bun|TypeScript 5.x

Quick Answer & Executive Definition

Zero-Dependency AI Agent Runtime: Why Lean Harnesses Outperform Heavy Frameworks: Heavy AI frameworks with hundreds of dependencies create maintenance nightmares, bloated Docker containers, and security risks. Smoke Monkey Harness proves that a complete, production-grade agentic AI runtime can be built using purely Node.js standard libraries. Designed as a zero-dependency, open-source TypeScript architecture under the MIT License with native Model Context Protocol (MCP) support and deterministic phase state machines.

Key Architectural Takeaways

Instant Cold Starts: Under 5ms initialization time, ideal for serverless and edge deployments.
Zero Supply Chain Attack Surface: Eliminates hundreds of third-party transitive packages.
Node.js Standard Library Primitives: Built on `node:fs`, `node:child_process`, and `node:crypto`.
Universal Portability: Runs seamlessly on macOS, Linux, Windows, Docker, and Electron.

The Hidden Toll of Heavy Node Modules in AI Systems

When an agent framework pulls in 80+ packages, your application inherits the vulnerabilities, license compliance headaches, and dependency resolution conflicts of all 80 packages. When deployed inside serverless functions or containerized microservices, this bloat translates directly to multi-second cold start delays.

Google Search Questions & Answers

Frequently Asked Questions

Q:How does Smoke Monkey make HTTP requests with zero dependencies?

Smoke Monkey utilizes the native `fetch` API built directly into Node.js 18+, eliminating the need for axios, node-fetch, or request packages.

Build with Smoke Monkey Harness

Zero dependencies. 24 built-in tools. Human-in-the-loop safety. 100% open source under the MIT License.

npm install smoke-monkey-harness

Zero-Dependency AI Agent Runtime: Why Lean Harnesses Outperform Heavy Frameworks

The Hidden Toll of Heavy Node Modules in AI Systems

Frequently Asked Questions

Q:How does Smoke Monkey make HTTP requests with zero dependencies?

Related Alternatives & Comparisons

LangChain TypeScript Alternative: Zero Dependencies & Deterministic Loops

OpenAI Assistants API Alternative: Sovereign Open Source Agent Runtime

Build with Smoke Monkey Harness