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Achievements

Achievement: StarstruckAchievement: Galaxy BrainAchievement: Pull Sharkx4Achievement: Pair Extraordinairex3Achievement: YOLOAchievement: Quickdraw

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felipesauer/README.md

Felipe Sauer · Full Stack Developer

Open to Full Stack opportunities (remote). Portuguese · Let's talk on LinkedIn.

$ whoami

I'm a Full Stack Developer who ships libraries with zero production dependencies and identical APIs across PHP and TypeScript, held together by shared test vectors and mutation testing. I work end to end: data modeling, API, interface and what the user sees. Strict typing, automated tests and max-level static analysis are not extras here, they are the default.

I work with coding agents every day, and I review everything they ship. The tool changes, the judgment does not: architecture, modeling and review are still engineering work. That is why I built mnema: a signed record of the decisions behind AI agent work, handed to every session and enforced at the edit.

$ ls projects/

  • mnema — signed, append-only decision records for AI coding agents. CLI and MCP server, plugins for Claude Code, Codex, Copilot CLI, Gemini CLI and more, and an independent Python verifier. TypeScript
  • monitor-sefaz — status page for Brazil's electronic invoice web services: 162 services (NF-e, NFC-e, CT-e, MDF-e, DC-e, BP-e across 27 states), multi-source consensus, uptime history and alerts on Discord, Slack and Telegram. Runs as a static site with no server. Live dashboard → TypeScript · React · Cloudflare Workers
  • safeaccess-identum — Brazilian document validation: CPF, CNPJ (including the alphanumeric format), IE for all 27 states, PIX keys and more. One set of parity vectors for both languages. PHP · TypeScript
  • safeaccess-inline — safe queries over untrusted JSON, YAML, XML, TOML and more, with security checks on by default and immutable writes. PHP · TypeScript

$ cat stack.txt

  • Back-end: Node.js, PHP 8.2+, Laravel, REST APIs
  • Front-end: React, Next.js, TypeScript, TailwindCSS, Vite
  • Data: PostgreSQL, MySQL, Neo4j
  • Infra: Docker, GitHub Actions, Cloudflare Workers, Linux
  • Quality: TypeScript strict, PHPStan max level, mutation testing (Stryker, Infection)
  • AI: coding agents, MCP, decision auditing

$ cat focus.txt

  • Real parity between PHP and TypeScript, proven by the same test vectors in both
  • Making AI agent work auditable, reviewable and reversible
  • Tools for Brazilian tax and document workflows that teams can rely on

Pinned Loading

  1. monitor-sefaz monitor-sefaz Public

    A SEFAZ está fora do ar? Monitor open-source de disponibilidade dos webservices de NF-e, NFC-e, CT-e, MDF-e e DC-e nas 27 UFs — status ao vivo, histórico de uptime e alertas, sem certificado digital.

    TypeScript 17 4

  2. mnema mnema Public

    Signed, append-only decision records for AI coding agents: an MCP server and CLI that open Claude Code, Codex, Copilot CLI, Gemini CLI, OpenCode, VS Code and Cursor sessions with your team's decisi…

    TypeScript 4

  3. safeaccess-inline safeaccess-inline Public

    Dual-language library for safe nested data access with dot notation in PHP & TypeScript — JSON, YAML, XML, INI, ENV, NDJSON with built-in security, immutable writes, and cross-language parity.

    TypeScript 3

  4. safeaccess-identum safeaccess-identum Public

    Validates Brazilian documents — CPF, CNPJ, CNH, CEP, CNS, PIS, IE (all 27 states), RENAVAM, Mercosul Plate, and Voter Title. PHP 8.2+ and TypeScript, identical API, zero production dependencies.

    TypeScript 3