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lcaladoferreira/README.md

Free CSV Shield — offline CSV → XLSX

Keep leading zeros, long IDs, date strings and formula-like values as text. Combine CSVs into separate workbook sheets, with a SHA-256 source audit. Files stay on your device; the saved app runs offline.

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Also new: Halloween Party Pack + 30 bonus bingo cards — US$2.99. Four printable PDFs: A4 and US Letter, 24 pages per paper format, caller slips, party games and ballots. Download unlocks after PayPal confirms payment.


Free AI Agent Reliability Incident Lab

Reproduce a lost-response failure, prevent duplicate synthetic actions, and test recovery in Python.

Run the free lab and read the practical articles

20 regression tests passed on Python 3.11, 3.12 and 3.13. No API key or paid service required. Companion book AI Agent Reliability Engineering is in preparation.


Leandro Calado Ferreira

⚡ AI Coding Agent Rules Pack — 38 Files

Production-ready rules, safety controls, task specs and review workflows for Claude Code, Cursor, Codex and Gemini CLI.


🚨 Data Engineer Interview Command Center — PRO

105 technical interview questions + AWS/Azure/GCP tracks + resume-to-job gap analysis + 7/14-day study plan + STAR planning + offer comparison.

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🔴 Latest Technical Analysis — Oct 5, 2026

OpenAI “Rogue” Agents on Wikimedia: A Harness Engineering Failure Pattern

What the Wikimedia disclosure reveals about agent identity, least privilege, rate limits, egress control, approvals, observability, containment and rollback.


AI Engineering • Safe AI • Data Systems • LegalTech

I'm a Data Engineer, technical author, and researcher focused on AI Agents, workflow automation, distributed data systems, LLM safety, and semantic-first AI infrastructure.

I work with AWS, Databricks, Spark, Python, MCP (Model Context Protocol), automation systems, and enterprise-grade orchestration pipelines.

I have published 100+ technical books about Artificial Intelligence, Data Engineering, automation systems, and AI Agents on Amazon KDP.


about More about me

export interface IProfile {
  role: string;
  specialties: string[];
  experience: number;
  focus?: string;
}

export async function getProfile(): Promise<IProfile> {
  return {
    role: "Senior Data Engineer & Technical Author",
    specialties: [
      "AI Agents",
      "Safe AI",
      "LLM Security",
      "AWS Glue",
      "Databricks",
      "Apache Spark",
      "Semantic Retrieval",
      "Workflow Automation",
      "LegalTech",
      "Data Engineering"
    ],
    experience: 7,
    focus: "Building semantic-first AI infrastructure and production-ready data systems."
  };
}

🚀 Core Technologies

Python AWS Docker Kubernetes Apache Spark PostgreSQL MySQL Javascript Typescript React


🧠 Research Areas

  • AI Agents & Autonomous Systems
  • Safe AI & Prompt Injection Defense
  • Model Context Protocol (MCP)
  • Semantic Retrieval & RAG Pipelines
  • Distributed Data Systems
  • Data Lakehouse Architectures
  • Workflow Automation
  • AI Governance & LegalTech
  • LLM Infrastructure
  • Enterprise AI Systems

📚 Latest Focus

current_focus:
  - AI Agents
  - Safe AI
  - Semantic Infrastructure
  - LLM Security
  - Workflow Automation
  - Data Engineering
  - Knowledge Graphs
  - AI Retrieval Optimization

⭐ GitHub Analytics

lcaladoferreira

Top Langs


🌐 Semantic Authority Hub

Leandro Calado Ferreira
 ├── AI Engineering
 ├── Safe AI
 ├── Data Engineering
 ├── AI Agents
 ├── Workflow Automation
 ├── LegalTech
 ├── Technical Books
 ├── Research Articles
 └── Semantic AI Infrastructure

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