coey.dev

From Creeper to the 2026 Hugging Face incident.

Two tools that run long tasks on Cloudflare without babysitting them: a heartbeat (loops-yaml) that re-prompts the agent, and terrarium running each job and handing back a receipt.

Google and Cloudflare are aiming at 2029 for post-quantum migration.

Notes from replacing runners, instructions, and implementations while keeping tests and behavior stable.

An experiment comparing direct, hostile, and verification-focused instructions across 36 coding-agent runs with executable checks.

Two tiny Cloudflare-backed devices. desk installs apps with git push. living-artifact updates its own firmware over Wi-Fi with signed releases and A/B OTA rollback.

Notes on using Dynamic Workers as short-lived execution spaces with explicit bindings and egress controls.

Twelve statements about agents and humans.

Reference hub for software correctness tools across runtime verification, model checking, verification languages, SMT solvers, theorem provers, and verified artifacts.

Minimal repro for long-running loops on Cloudflare: a Durable Object alarm that re-enters the Worker, plus a Workflow draining the same KV queue.

A designer note about confusing personal preference with whether an interface, explanation, or prompt reaches its listener.

A deja gate passed while allowing broken storage behavior.

A personal note about receiving critique, watching code get rewritten, and separating the work from the feeling of being judged.

Five GPT-5.2 tasks with regex judges comparing curated guidance, human documentation, raw source excerpts, and baseline.

A 75-call GPT-4.1 experiment comparing five context representations across goals, files, conventions, corrections, and prior reasoning.

A catalogue of 20 generated interface concepts for agent memory.

Does position in the context window matter?

How solving a jigsaw puzzle with my daughter led me to compare familiar puzzle moves with named computer-science heuristics.

A note about writing instructions, making the result observable, and waiting long enough to see what happened.

A three-part lens for examining distribution: what moves, how it is copied, and how destinations are chosen.

An interactive comparison of two reporting views: a concise operational summary and a detailed diagnostic view.

A visual essay comparing the limits and structures of stories, documentation, tests, and prompts.

A planning-loop prototype: two alternating model calls, streaming output, and a human interrupt path.

Using exe.dev to put Claude in the observer seat while another Claude does the work.

An open-ended agent session produced a memory store.

The tool that emerged from a failed experiment.

In one run, startup work consumed 42% of the context.

We built gateproof.

UI shows "Order Confirmed!"

The repo is the thing that persists.

A browser-only ASCII video converter.

How explicit error types reversed my thinking about error handling.

What makes a useful Durable Object: mental models, rough numbers, and open questions about the boundaries.

The Network Effect implements actual browser surveillance while you read a story about surveillance.

Self-diagnosis quiz for Durable Objects billing gotchas.

Interactive quiz with AI-powered evaluation.

Sequential chains, fan-out/fan-in, routing, loops..implemented with Firestore docs + triggers.

An adapter from Node-style net.Socket calls to cloudflare:sockets, tested with several database and TCP client patterns.

A live Chrome session attached to a Cloudflare Agent: Stagehand actions, CDP frame streaming, and open questions about session cost.

Implementing Cloudflare's agent patterns using the Agents SDK with Durable Objects, state management, and scheduling.

One-button passkey auth..register or login, same flow.

POC: Dynamic code execution with Cloudflare Worker Loader API, isolated environments, and Durable Object history tracking

Managers and agents with ordered fan-out and health.

Own user data at the edge..typed, real-time, zero cluster ops.

Database-less analytics: broadcast now, query later.

Passed CASA on a Cloudflare Worker with 3 dependencies. 8 security controls, real code, open-sourced checklist.