Today: agents that watch your data, a model that broke a three-year stalemate, and a fishing game that explains why systems collapse.
The watcher you write in Markdown.
PostHog's scouts are small agents that read your product data, spot a pattern, and emit a signal — one surfaces broken API calls from the wild, another tracks brand sentiment across the open web. The branching you'd normally hard-code lives instead in plain-English Markdown skills, run by a harness that keeps its own memory between passes. The post is the whole architecture, laid open.
Decision logic written as readable Markdown, not if/else trees.
The runner that executes a skill on its schedule.
State the scout carries from one run to the next.
Watches API traffic and flags what's breaking.
Reads sentiment about you across the internet.
The actionable ping a scout fires when it sees something.
Three years stuck. One session unstuck.
Immunologist Derya Unutmaz had spent three years on a T-cell behaviour he couldn't explain. Handed the problem, GPT-5 Pro proposed the mechanism that fit — with threads pointing toward cancer and autoimmune work. It reads less like a chat transcript than like a collaborator who had absorbed every paper in the field. Worth ten minutes whether or not you ever set foot in a lab.
- Field
- T-cell behaviour
- Open for
- Three years
- Resolved in
- One session
- Collaborator
- GPT-5 Pro
The agent stack, itemised.
Vercel laid out the parts list for a production agent: model access without lock-in, durable multi-step execution, sandboxed compute, scoped tokens to outside tools, and delivery to the channels users already live in. Even if you never ship on Vercel, it's a clean checklist of everything an agent needs past the prompt — the durability, isolation, and credentials that turn a demo into something you'd run.
The clock on encryption starts now.
A new executive order puts hard dates on post-quantum migration — a named lead by July, plans by September, encryption moved by end of 2030 and authentication by 2031, contractors included. Cloudflare's counsel: stop waiting for a perfect crypto inventory. Turn on post-quantum encryption for internet-facing traffic today, write it into procurement at no extra cost, and start a quantum-impact inventory for the long-lived keys that "harvest now, decrypt later" attacks come for first.
- JUL 2026Name a post-quantum migration lead
- SEP 2026Submit agency migration plans
- DEC 2030Encryption transitioned
- DEC 2031Authentication transitioned
Everyone fishes rationally. The ocean dies anyway.
Fish Banks rebuilds Dennis Meadows' tragedy-of-the-commons model as a playable multiplayer sandbox. Each team sees only its own cash and catch, never the hidden fish stock, so individually sensible buying strip-mines the shared sea. It runs fully offline, headless from Node, and is built for an agent to extend — add quotas, change pricing, or let Claude run a fishing company and watch it drain the commons. What it drills home is that structure, not character, drives the crash.
A playlist in. Notes out.
Point this at a YouTube playlist and it transcribes every video, lifts the signal with retrieval, and assembles an interactive HTML mini-site of notes — plus a NotebookLM-ready feed for audio you can take on a walk. It's the conference-backlog problem solved as a pipeline: skip the live watch, read the distilled version, keep the source. Clone it, aim it at your own backlog, and read tonight.
Every video in the playlist, pulled down to text.
The signal lifted out with retrieval-augmentation.
An interactive HTML site, plus a NotebookLM audio feed.
That's today.
Six picks for a senior engineer or founder with ten minutes: tools to adopt this week, dev and agent infrastructure, one privacy-and-security read with a real deadline, and a piece of science with a practical kernel.
Sources today — PostHog · OpenAI · Vercel · Cloudflare · Telegram's @ProductsAndStartups
Issue 065 · Wednesday 24 June 2026 · Europe/Zürich