Diego Duran — Backend & AI Developer
Backend engineer who ships agentic CLI tooling. Diego Duran — Backend & AI Developer
Ingeniero backend que construye herramientas CLI agentivas.

I build backends that stay out of the way and CLI skills that make AI agents actually useful.

Construyo backends que no estorban y skills CLI que hacen que los agentes IA sean realmente útiles.

runtimes

CLI skills

projects

03y

backend in prod

runtimes

skills CLI

proyectos

03y

backend en prod

01 /

whoami

Multi-runtime backend developer working across Node, Python, Go, and PHP. I care about clean architecture, fast deploys, and systems that do one thing well.

For the past year I've been deep in agentic tooling — building skills for Claude Code, OpenCode, and Gemini CLI. The interface between humans and models is where the interesting problems live.

I believe in learning by shipping. Every project in this portfolio exists because I needed to solve a real problem, not because I wanted something to put in a portfolio.

Based in Colombia. Available for remote backend or AI-tooling roles.

Desarrollador backend multi-runtime trabajando con Node, Python, Go y PHP. Me importa la arquitectura limpia, los deploys rápidos y los sistemas que hacen una sola cosa bien.

Durante el último año estuve metido en herramientas agentivas — construyendo skills para Claude Code, OpenCode y Gemini CLI. La interfaz entre humanos y modelos es donde viven los problemas interesantes.

Creo en aprender haciendo. Cada proyecto en este portfolio existe porque necesité resolver un problema real, no porque quería algo para mostrar.

Basado en Colombia. Disponible para roles remotos de backend o AI-tooling.

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stack & deps stack & deps

[+] NestJS production API framework of choice framework API principal en producción primary

[+] Django data-heavy backends and rapid prototypes backends con datos pesados y prototipos rápidos primary

[+] Golang CLI tooling and performance-critical paths herramientas CLI y paths críticos de rendimiento primary

[+] Laravel legacy systems and monolith-first projects sistemas legacy y proyectos monolito-first primary

[x] AWS EC2, S3, RDS, Lambda — daily driver EC2, S3, RDS, Lambda — uso diario infra

[-] Postgres default database for everything relational base de datos predeterminada para todo lo relacional data

[-] Docker local dev, CI pipelines, prod containers dev local, pipelines CI, contenedores prod infra

[x] Claude / OpenCode / Gemini agentic CLI skill targets targets de skills CLI agentivos ai

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selected work trabajo seleccionado

› RPCraft (discord-rpc-tui) 2025 open source

TypeScriptInkReactMCP SDKDiscord RPC

Discord Rich Presence manager with TUI and integrated MCP server for AI agent control.

Gestor de Rich Presence de Discord con TUI y servidor MCP integrado para control desde agentes IA.

Ink/React TUI with keyboard navigation, headless mode, systemd service
MCP server (stdio + SSE) with 7 tools: set_activity, set_profile, list_profiles, connect, disconnect, get_status, open_dev_portal
Image support via Dev Portal assets or external URLs (auto-converted to mp:external/)
58 tests, 29KB bundle, auto-reconnect with exponential backoff

TUI Ink/React con navegación por teclado, modo headless, servicio systemd
Servidor MCP (stdio + SSE) con 7 herramientas para controlar el RP desde agentes IA
Soporte de imágenes via assets del Dev Portal o URLs externas
58 tests, 29KB bundle, reconexión automática con backoff exponencial

rpc-tui mcp

› skills-kit 2025 open source

ShellMarkdownClaude CodeOpenCodeGemini CLI

Agent skills for repo setup, multi-CLI workflows, context loading, API testing, supply chain security, codebase auditing, and autonomous agent orchestration.

Skills de agente para setup de repos, workflows multi-CLI, carga de contexto, testing de APIs, seguridad de cadena de suministro, auditoría de codebases y orquestación autónoma de agentes.

10 protocol-first skills: git-setup, swarm-forge, path-context, api-test, npm-supply-chain, verification-loop, go-quality, env-secrets, codebase-audit, loop-engineering
Multi-CLI support: Claude Code, OpenCode, Codex, and Gemini CLI
Install as a kit: npx skills add fxckcode/skills-kit

10 skills protocol-first: git-setup, swarm-forge, path-context, api-test, npm-supply-chain, verification-loop, go-quality, env-secrets, codebase-audit, loop-engineering
Soporte multi-CLI: Claude Code, OpenCode, Codex y Gemini CLI
Instalación como kit: npx skills add fxckcode/skills-kit

npx skills add fxckcode/skills-kit

› easy-rag 2025 open source

NestJSTypeScriptPrismapgvectorDocker

Production-ready RAG template with NestJS, Prisma 7, pgvector, and Docker Compose.

Template RAG listo para producción con NestJS, Prisma 7, pgvector y Docker Compose.

NestJS backend with Prisma 7 + pgvector for vector similarity search
PostgreSQL with pgvector extension, fully dockerized
Clean architecture: documents → chunks → embeddings → semantic search

Backend NestJS con Prisma 7 + pgvector para búsqueda por similitud vectorial
PostgreSQL con extensión pgvector, completamente dockerizado
Arquitectura limpia: documentos → fragmentos → embeddings → búsqueda semántica

github.com/fxckcode/easy-rag

› CaS — CLI as a Service 2025 reference arch

TypeScriptGoTerraformK8s

Reference architecture for corporate autonomous agents with policy control, isolated execution, and persistent memory.

Arquitectura de referencia para agentes autónomos corporativos con control de políticas, ejecución aislada y memoria persistente.

Control plane with orchestrator, planner, policy engine, and tools registry
Isolated execution runners (shell, CI/CD, data) with autonomy modes
Persistent org/project memory with semantic retrieval for long-running goals

Control plane con orquestador, planificador, motor de políticas y registro de herramientas
Runners aislados (shell, CI/CD, datos) con modos de autonomía
Memoria persistente de org/proyecto con recuperación semántica para objetivos de largo plazo

github.com/fxckcode/CaS

› webinfo 2024 cli tool

GoCobraRestyWappalyzer

Go-powered CLI that analyzes website infrastructure, security, and configuration in seconds.

CLI en Go que analiza infraestructura web, seguridad y configuración en segundos.

HTTP inspection + SSL/TLS certificate analysis + technology fingerprinting
DNS records (A, AAAA, MX, NS, TXT, CNAME) and WHOIS lookup
Built with Cobra CLI, Resty HTTP client, WappalyzerGo for tech detection

Inspección HTTP + análisis de certificados SSL/TLS + detección de tecnologías
Registros DNS (A, AAAA, MX, NS, TXT, CNAME) y consulta WHOIS
Diagnóstico con un solo comando: go install github.com/fxckcode/webinfo@latest

go install github.com/fxckcode/webinfo@latest

› relay 2026 open source

GoMCPOllamaOpenAI APIAnthropic API

Local AI Gateway — single Go binary exposing OpenAI/Anthropic endpoints to local models.

Gateway de IA local — un solo binario Go que expone endpoints OpenAI/Anthropic a modelos locales.

Dual-protocol API: OpenAI Chat Completions + Anthropic Messages on the same binary
Interchangeable backends: Ollama, vLLM, Claude CLI, OpenCode CLI
MCP server mode with 5 tools: generate_key, revoke_key, list_keys, list_models, health
~12 MB static binary, zero runtime dependencies

API de protocolo dual: OpenAI Chat Completions + Anthropic Messages en el mismo binario
Backends intercambiables: Ollama, vLLM, Claude CLI, OpenCode CLI
Modo servidor MCP con 5 herramientas: generate_key, revoke_key, list_keys, list_models, health
~12 MB binario estático, cero dependencias de runtime

github.com/fxckcode/relay

› whisper-stt-mcp 2026 open source

Pythonfaster-whisperMCPCUDAffmpeg

MCP server for local high-quality audio transcription using faster-whisper with GPU acceleration.

Servidor MCP para transcripción de audio local de alta calidad usando faster-whisper con aceleración GPU.

4 MCP tools: transcribe, list_models, download_model, transcribe_batch
GPU acceleration with INT8 quantization (large-v3 in ~2.5GB VRAM)
VAD with silero-vad, auto language detection (99+ languages)
Batch processing, word-level timestamps, auto format conversion

4 herramientas MCP: transcribe, list_models, download_model, transcribe_batch
Aceleración GPU con cuantización INT8 (large-v3 en ~2.5GB VRAM)
VAD con silero-vad, detección automática de idioma (99+ idiomas)
Procesamiento por lotes, timestamps por palabra, conversión automática de formatos

github.com/fxckcode/whisper-stt-mcp

› dotter 2026 open source

GoDNSWHOISMCPCLI

Domain availability checker with parallel TLD scanning and MCP server mode for agents.

Verificador de disponibilidad de dominios con escaneo paralelo de TLDs y modo servidor MCP para agentes.

Two-stage detection: DNS check (fast) + WHOIS fallback (accurate)
Parallel TLD scanning via goroutines (10 concurrent, configurable)
MCP server mode for agent integration (check_domain tool)
JSON output, exit codes for scripting, ~8 MB static binary

Detección en dos etapas: DNS check (rápido) + WHOIS fallback (preciso)
Escaneo paralelo de TLDs via goroutines (10 concurrentes, configurable)
Modo servidor MCP para integración con agentes (herramienta check_domain)
Salida JSON, exit codes para scripting, ~8 MB binario estático

go install github.com/fxckcode/dotter@latest

04 /

cli skills cli skills

git-setup-skill

Professional Git/GitHub repo setup: .gitignore, .gitattributes, README, licensing, metadata, tags, releases, and Actions. Configuración profesional de repos Git/GitHub: .gitignore, .gitattributes, README, licencias, metadata, tags, releases y Actions.

gitgithubci

swarm-forge-skill

Multi-CLI agent workflow setup across Claude Code, Codex, OpenCode, and Gemini CLI using TDD, BDD, ATDD, or SDD. Configura multi-agente para Claude Code, Codex, OpenCode y Gemini CLI con patrones TDD, BDD, ATDD o SDD.

agentsworkflowmulti-cli

path-context-skill

Loads external project folders as reference context with a 6-pass discovery heuristic and strict token budget. Carga carpetas de proyectos externos como contexto de referencia con descubrimiento heurístico y presupuesto de tokens.

contextdiscoveryworkflow

api-test-skill

Protocol-first, client-agnostic REST API testing from the terminal with auth inference, chaining, and assertions. Pruebas REST API protocol-first desde la terminal con inferencia de auth, encadenamiento y aserciones.

testingapirest

npm-supply-chain-security

Three-layer npm supply chain security: consumer hardening, PNPM lockdown, and publisher OIDC/Provenance. Seguridad de cadena de suministro npm en tres capas: hardening de consumidor, bloqueo PNPM y OIDC/Provenance para publicadores.

securitynpmsupply-chain

verification-loop

Structured 7-phase verification: Build → Type → Lint → Test → Spec → Security → Smoke for any codebase. Verificación estructurada en 7 fases: Build → Type → Lint → Test → Spec → Security → Smoke para cualquier codebase.

qaverificationtesting

go-quality

Go project quality standards: linting, race detection, error wrapping, context propagation, and CI. Estándares de calidad Go: linting, race detector, error wrapping, propagación de contexto y CI.

gogolangquality

env-secrets-management

Manage .env files and secrets with workarounds for terminal censorship that corrupts sensitive values. Maneja .env y secretos con workarounds para censura del terminal que corrompe valores sensibles.

secretsenvsecurity

codebase-audit

Systematic codebase audit: gap analysis, architecture review, quality assessment against PRDs and specs. Auditoría sistemática de codebase: análisis de gaps, revisión de arquitectura y calidad contra PRDs y specs.

auditreviewquality

loop-engineering

Autonomous multi-agent orchestration with maker-checker splits, nested SDD, and 7-dimension AI code review. Orquestación autónoma multi-agente con splits maker-checker, SDD anidado y revisión de código IA en 7 dimensiones.

agentsorchestrationloops

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