# Open-source tools for AI agents

> Four MIT-licensed projects built to be used by AI agents as well as people: an AI co-founder for small businesses, a personal-finance app, a link manager and a presentation skill.

The same idea as AgentBuff, in the open: software an AI agent can operate safely, with MCP servers, scoped tokens and deterministic engines wherever the numbers matter.

- AgentBuff Co-Founder: a financial model from a deterministic engine, and an MCP gateway with 9 tools.
- FinFreedom: FIRE planning with 1,000 Monte Carlo simulations, and an MCP server with 13 tools and human confirmation.
- Linky: a REST API with signed webhooks, 146 test cases and a CI pipeline with Gitleaks.

- 4 open-source projects
- 22 MCP tools across two apps
- MIT license on every project

- Role: Author and maintainer
- Period: 2026
- Stack: MCP, Next.js, TypeScript, Prisma, Drizzle ORM, Playwright, Open source
- GitHub: github.com/nugrahalabib (https://github.com/nugrahalabib)

**TL;DR** Nugraha Labib Mujaddid published four MIT-licensed projects in 2026, each built so that an AI agent can use it as well as a person: AgentBuff Co-Founder for small-business founders, FinFreedom for personal finance, Linky for links and QR codes, and AgentBuff Presentation Skills for slide decks.

The idea behind all four is the one behind AgentBuff: software that an AI agent can operate safely. Where numbers matter, a tested engine does the maths and the language model only writes the words; where an agent can change data, it goes through scoped tokens and, for money, a human confirmation.

## AgentBuff Co-Founder

A web app in Bahasa Indonesia that walks a small-business founder from a raw idea to sourced market research, a business plan with a financial model, a brand identity, and an investor-ready proposal and pitch deck. It runs on the user's own Gemini or OpenAI key.

- **Numbers from a deterministic engine**: cost of goods, break-even, ROI, NPV and IRR are calculated by tested code; the model only proposes assumptions and writes the narrative.
- **Callable by agents**: an MCP gateway with 9 tools and read or write scoped tokens.
- **Stack**: Next.js 16, React 19, strict TypeScript, Prisma with PostgreSQL, Vitest; the README lists 260 tests.

## FinFreedom

A personal-finance app made for Indonesia: accounts and transactions, CSV import with automatic categories, four budgeting methods, and income tax (PPh 21), zakat and BPJS calculations.

- **FIRE planning** with 1,000 Monte Carlo simulations, backtests and stress tests.
- **An MCP server with 13 tools**, so an agent such as Claude or Cursor can read and record data, with scoped tokens, an audit log and a human confirmation before anything is written.
- **Stack**: a TypeScript monorepo with Next.js 15, React 19, Prisma and the official MCP SDK.

## Linky

An open alternative to Bit.ly: custom short links, branded QR codes, click analytics, password-protected and expiring links, deep links for iOS and Android, link-in-bio pages, and CSV import from Bit.ly, Rebrandly, TinyURL, Dub.co and Short.io.

- **For developers**: a REST API with API keys, webhooks signed with HMAC-SHA256, and an OpenAPI 3.1 specification.
- **Checked on every change**: 146 test cases and a CI pipeline that runs lint, type checks, tests, the build, npm audit and Gitleaks.
- **Stack**: Next.js 15, React 19, strict TypeScript and Drizzle ORM on SQLite or PostgreSQL.

## AgentBuff Presentation Skills

A skill for AI coding agents such as Claude Code, Codex and Gemini CLI: the agent builds an HTML presentation from a brief or a PowerPoint file and exports it to PDF, PNG or JPG, or PPTX that looks exactly like the original.

- **Built on open source**: it extends the Frontend Slides skill and the Bold Template Pack by zarazhangrui, credited in the README.
- **My part**: the rework that makes it work with any agent, and a multi-format exporter on Node.js, Playwright and pptxgenjs, with PPTX as images or as editable text.

**At a glance**
- Projects: 4
- License: MIT
- Published: April to July 2026
- Common thread: Built for AI agents: MCP, scoped tokens, deterministic engines

**The repositories**
- [AgentBuff Co-Founder](https://github.com/nugrahalabib/AgentBuff-Co-Founder): AI co-founder for small businesses
- [FinFreedom](https://github.com/nugrahalabib/FinFreedom): Personal finance with an MCP server
- [Linky](https://github.com/nugrahalabib/Linky-Agentbuff): Short links, QR codes and analytics
- [AgentBuff Presentation Skills](https://github.com/nugrahalabib/AgentBuff-Presentation-Skills): Decks exported to PDF, images or PPTX

Source: https://nugrahalabib.com/work/open-source-agent-tools
Author: Nugraha Labib Mujaddid (https://nugrahalabib.com)
Published: 2026-09-24. Updated: 2026-09-25.