FlexAppDev — public showcase of Mat Siems' app fleet, the AI stack that powers it, and the daily builds that ship it.
17 sites running Next.js 16 + Supabase + Mongo + S3 with shared admin shell.
Supabase email-link auth, allow-list pinned to mat@matsiems.com, env-guard middleware.
5 security headers, branded error/404, sitemap + robots, per-route OG cards.
TikTok-style feed across apps, videos, repos, prompts, skills — Math.random() each visit.
All 17 v2 sites with live screenshots, taglines, status, and source.
100-app catalog with descriptions, tags, and 78 suggested concepts.
Latest videos from @mat-siems-production on YouTube.
Starred repos from @flexappdev, grouped by language.
Top 100 AI prompts — one click to copy.
TikTok-style mobile feed — random fresh on every refresh.
Agent-first stack — Agentic Engineering, MCP, evals, vector DBs, multi-agent.
Full-stack baseline — Python, TypeScript, Next.js, React, FastAPI, Supabase.
Python A–Z — variables to async, NumPy, pandas, FastAPI, pytest, uv + ruff.
CAD and design tools — 2D drafting, parametric 3D, simulation, ECAD, open-source.
20+ languages with a 'when to pick it' guide — systems, web, functional, mobile, JVM.
Backoffice 2025 — fleet registry, deploys, health, assets, content pipelines.
Tokens to agents — transformers, RAG, tool use, evals, multi-agent, generative media.