radharc - search

radharc is a curated search engine aimed at searching blog posts from RSS and atom feeds. It currently focusses on feeds for roleplaying (ttrpg), tech, and finance blog posts. You can search specific collections by using the rpg, tech, or finance pages.

You can see the list of feeds indexed here. Additional sources can be found on the about page.

Latest Posts

The dent and the crater

On hardening as a senior leader, the cost of walls that read as wisdom, and the quiet work that keeps a dent from becoming a crater.

jonno

May 06, 2026

I Built a Read-Later Chrome Extension Because Pocket Died

Pocket shut down in July 2025. I needed somewhere to dump the articles I keep telling myself I'll read later. So I built a Chrome extension that does exactly that and nothing else. Local-only, no…

jonno

May 05, 2026

How to Work and Compound with AI

Context as infra, taste as config, verification for autonomy, scale via delegation, closing the loop.

eugene yan

May 03, 2026

Product market fit isn't a stage, it's a gauntlet

PMF gets sold as a milestone. It's actually a gauntlet that bends founders, breaks teams, and quietly poisons technical decisions. Most of the damage isn't from missing PMF — it's from how you…

jonno

May 01, 2026

Why I Still Reach for Scheme and Lisp Instead of Haskell

<div id="content" class="content max-w-full"> <p> There is a persistent tension in software engineering between the beautiful, mathematically pure ideal of a program, and the messy, pragmatic reality…

join the free world

Apr 28, 2026

Change management

On the personal version of change management — the long, weird middle bit between who you were and who you're becoming.

jonno

Apr 25, 2026

Three Ways to Look at Time

ST-ResNet decomposes crime patterns into three temporal scales and models each one separately. Clever architecture, but does it actually help with only four years of NZ data?

jonno

Apr 23, 2026

What an hour of your attention is worth

You pay Big Tech about $1,000 a year in attention. Here's how to read the meter — and why building your own is suddenly cheaper than opting out.

jonno

Apr 21, 2026

Teaching a Neural Network to Watch Crime Like Video

ConvLSTM was built for weather radar. Turns out predicting crime on a grid is basically the same problem. Here's how it works and what it learned.

jonno

Apr 16, 2026

Open-Source Agent That Teaches Claude Code Your Architecture

AI made software cheap to build but not cheap to scale. Evolutionary architecture with domain-aware AI agents is the missing piece.

jonno

Apr 15, 2026

OpenHealth – Chat with Apple Health Data, Anywhere

I built OpenHealth because Claude's and ChatGPT's Apple Health connectors are US-only. Drop your export.zip, get seven markdown files any LLM can read — browser, CLI, or phone-to-desktop over…

jonno

Apr 13, 2026

Claude Code Can Now Spawn Copies of Itself in Isolated VMs

Wiring up an MCP server so Claude Code can spawn isolated VMs, the SSE-to-Streamable-HTTP migration that broke everything, streaming architecture, and what productionising this would actually look…

jonno

Apr 13, 2026