🇨🇴 Colombia · 2400m above sea level · where cosmic radiation kills hardware and makes you learn fast

I find bugs. I read source code, trace execution paths, and write reports that go upstream.

Recent contributions:

• 🐛 Linux kernel / mt76 — Two patches submitted to linux-wireless for the MT7921U chip:
  • [PATCH 1/2] mt76: connac: fix txpower_cur not updated in mt76_connac_mcu_set_rate_txpower() — fixes mt76_get_txpower() always reporting 3 dBm because txpower_cur was never updated after sending the SKU table to firmware. Traces root cause to the zero-initialized value + 2-chain delta path in mt76_get_txpower().
  • [PATCH 2/2] mt76: mt7921u: add USB reset on SEFI chip recovery — adds usb_queue_reset_device() in both mt7921u_mac_reset() and mt792xu_init_reset() so the chip recovers automatically from cosmic-radiation-induced SEFIs instead of hanging permanently. Tested at 2400m altitude, Bogotá, Colombia.
• 🔒 Dolibarr ERP — Security research and vulnerability reporting. Analyzed root causes in the codebase and submitted findings through responsible disclosure.
• 🖥️ cosmic-comp — Forensic analysis of the Wayland compositor source (Rust). Identified a tiling geometry bug triggered by fullscreen requests from tiled windows, traced to update_positions() in tiling/mod.rs. Filed as issue #2146 after ruling out PR #2099 as a fix.

I don't run exploits. I read the code, find the root cause, and report it. Gray/White team.

A production homelab in Bogotá serving real businesses — 6 to 12 users daily.

Minisforum NAB9 · i9-12900H · dual Intel I226-V · MT7921 WiFi
Ubuntu Server · Podman Quadlets · libvirtd · Tailscale · dnsmasq · Cockpit (compiled from source)

Services in production:

• 📄 Colombian e-invoicing compliance (DIAN) — custom modules for ERPNext and Dolibarr, UBL 2.1, XAdES-BES/EPES, production use · private, active development
• 🐦 ERPNext via podman-compose for furniture business management
• 🗄️ Dolibarr fork + Quadlet pod (MariaDB + app container)
• 📡 sensor_app — Arduino (TMP117+BME680) → SQLite + Telegram alerts
• 📦 cockpit-sensors — lm-sensors module for Cockpit
• 🔐 Zero-trust network via Tailscale MagicDNS + iptables

Infrastructure I've built:

• WiFi SEFI recovery automation (cosmic radiation induced Single Event Functional Interrupts)
• USB power cycling for MT7921 resets without rebooting
• Cockpit 354+ compiled from source with custom modules
• Rootless Podman Quadlets for security isolation

• Read source before touching config
• journalctl and kernel logs before guessing
• Reproduce → isolate → root cause → report
• Everything through git: servidor1-scripts repo → GitHub → git pull on server

• Colombian e-invoicing (DIAN) — open-source compliance modules for ERPNext and Dolibarr · releasing when stable
• Linux driver contributions — mt76 / MT7921 upstream patches
• Security research — ERP and compositor-level vulnerability analysis

If you're working on mt76, cosmic-comp, ERPNext, Dolibarr, or Colombian tax compliance — let's talk.