engineering-notes

Technical write-ups on some of the harder problems I came across.

Paper	Topic	Stack
4K60 Native Ingest	Findings from 40+ videos testing codecs, bitrates, resolutions, a Chrome extension, and native iPhone uploads	iOS media pipeline, short-form video, Video Drop
RLS silently disabled my GIN index	Why a public text search 500'd for anonymous users only: `@@` is not leakproof, so row security refused the index and every search became a 10s seq scan	PostgreSQL 17, RLS, GIN, tsvector, Supabase
Scaling streaming toolsets on Cloudflare	Designing a per-user multi-overlay platform so cost-per-user stays roughly flat as you grow — edge push, Hibernatable WebSockets, EventSub	Cloudflare Workers, KV, Durable Objects, Hibernatable WebSockets, EventSub
Chat bot memory	Persistent memory for a Twitch chat bot without storing raw chat logs	C#, Streamer.bot, Gemini Flash
Building Pathos	A worker-side job-search system connecting roles, evidence-backed resumes, application tracking, and a review-first browser extension	React 19, Vite, Supabase, Cloudflare Workers, Chrome MV3
Inbound job-status sync	Privacy-first status detection from emails users choose to forward, with guarded updates and review	Supabase Edge Functions, TypeScript, Resend

deutschmark's other apps

	Pathos Worker-side job search with source-linked roles, evidence-checked resumes, and application tracking.
	Markskill A product-engineering skill for AI agents: trace behavior to its owner, fix root causes, shape interfaces around real tasks, and verify claims with evidence.
	Alert! Alert! Turn a video URL or local file into a cropped, trimmed stream alert.
	Auto iPhone Uploader Write a video's title and captions once on your PC, then post it from the real apps on your iPhone. Early preview.
	Streamer Online Build OBS scenes and browser-source overlays with connected streamer tools.
	ForgetMeNot A local-first Twitch bot that remembers regulars, callbacks, and stream lore.