# FMKTech Blog

> Original experiments and practical guides to AI agents, integrations, and modernizing legacy software.

Every article below is also available as clean Markdown (no nav, scripts, or layout markup) at the same URL with a `.md` suffix.

## Legacy ERP in the AI era: software should adapt to you

- Author: FMKTech Team
- Published: 2026-09-05
- Reading time: 7 min
- Tags: Purpose-built software, Legacy ERP, Artificial intelligence, System migration
- URL: https://www.fmktech.com.br/blog/modernize-legacy-erp.md (HTML: https://www.fmktech.com.br/blog/modernize-legacy-erp)

AI is a reason to revisit the build-versus-buy decision. Replace the ERP, SaaS and spreadsheets holding you back with software you control.

## Replicating Fable with Opus: a game-building experiment

- Author: Foad Kesheh
- Published: 2026-06-17
- Reading time: 13 min
- Tags: AI, Coding Agents, Multi-Agent, Orchestration, Three.js, Claude
- URL: https://www.fmktech.com.br/blog/replicating-fable-with-opus.md (HTML: https://www.fmktech.com.br/blog/replicating-fable-with-opus)

A 3D game built through parallel agents, the contract and review workflow behind it, and playable comparisons showing what changed when we made the art direction explicit.

## Agent Skills and MCP: instructions are not permissions

- Author: FMKTech Team
- Published: 2025-11-11
- Reading time: 3 min
- Tags: Agent Skills, MCP, Agent Engineering
- URL: https://www.fmktech.com.br/blog/agent-skills-mcp-future.md (HTML: https://www.fmktech.com.br/blog/agent-skills-mcp-future)

Use Skills to package a repeatable method and MCP to connect the required tools. Keep execution, access, and verification explicit.

## Modernizing legacy software with AI: understand, change, verify

- Author: FMKTech Team
- Published: 2025-11-09
- Reading time: 5 min
- Tags: Legacy Software, Context Engineering, AI Coding
- URL: https://www.fmktech.com.br/blog/ai-coding-brownfield-projects.md (HTML: https://www.fmktech.com.br/blog/ai-coding-brownfield-projects)

A practical workflow for improving an existing system: map the business rules, give coding agents focused context, and replace one part at a time without losing control.

## Ralph Wiggum loops: useful persistence needs a stopping rule

- Author: FMKTech Team
- Published: 2025-11-08
- Reading time: 4 min
- Tags: Coding Agents, Automation, Software Engineering
- URL: https://www.fmktech.com.br/blog/autonomous-software-coding-ralph-wiggum.md (HTML: https://www.fmktech.com.br/blog/autonomous-software-coding-ralph-wiggum)

How to use a coding loop for bounded implementation work, with explicit acceptance checks, spending limits, and a handoff when progress stops.

## AI agent security: limit what a mistake can do

- Author: FMKTech Team
- Published: 2025-11-07
- Reading time: 4 min
- Tags: AI Security, Permissions, Prompt Injection
- URL: https://www.fmktech.com.br/blog/ai-agent-security-challenges.md (HTML: https://www.fmktech.com.br/blog/ai-agent-security-challenges)

A practical threat model for agents with access to business systems: constrain tools, protect data, separate approvals, and test the boundaries outside the prompt.

## AI agent architecture: choose the simplest system that works

- Author: FMKTech Team
- Published: 2025-11-06
- Reading time: 4 min
- Tags: AI Architecture, Workflows, Software Engineering
- URL: https://www.fmktech.com.br/blog/understanding-ai-agents-architecture-and-patterns.md (HTML: https://www.fmktech.com.br/blog/understanding-ai-agents-architecture-and-patterns)

From a fixed workflow to an autonomous loop: how to choose an architecture, define its boundaries, and evaluate the result beyond a convincing demo.

## AI agents: where they help your operation — and where they do not

- Author: FMKTech Team
- Published: 2025-11-05
- Reading time: 4 min
- Tags: AI Agents, Operations, Business Strategy
- URL: https://www.fmktech.com.br/blog/what-are-ai-agents.md (HTML: https://www.fmktech.com.br/blog/what-are-ai-agents)

A practical guide to choosing an automation project, deciding how much autonomy it needs, and measuring whether it improves the way your business works.

## MCP in practice: connect an agent without handing it the keys

- Author: FMKTech Team
- Published: 2025-11-04
- Reading time: 4 min
- Tags: MCP, Integrations, AI Architecture
- URL: https://www.fmktech.com.br/blog/mcp-model-context-protocol.md (HTML: https://www.fmktech.com.br/blog/mcp-model-context-protocol)

What Model Context Protocol standardizes, what your application still needs to enforce, and how to design a useful first integration.

## Where to look next

- [Homepage](https://www.fmktech.com.br/.md)
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