I Cut My AGENTS.md Files by 50% Using an Eval
How I evaluated one global and four project AGENTS.md files, removed about half the instructions, and checked what still changed agent behavior.
Hwee-Boon Yar
I write, ship and sell software products. Indie. Writing code in Swift, TypeScript and Ruby. Based in Singapore, working remotely. This is my blog.
Latest posts
How Kamal Fits My Coding-Agent Workflow
Why I run small products on one Hetzner server with Kamal, and how Agent Control serializes deployments when coding agents are doing the work.
Why I Built an Orchestration Tool for My Coding Agents
Why I built Agent Control, my macOS app and CLI for coordinating coding-agent sessions, queues, callbacks, loops, and cross-project work.
Coding Agents Still Need Engineering Judgment
AI-built SaaS apps can work, but the expensive cleanup starts when nobody supervises the system design, data model, auth boundaries, and production workflows.
Cloudflare Tunnels Changed How I Test Local Integrations
Cloudflare Tunnel changed local integration testing for me because it gave local services stable HTTPS names that behave like the real app boundary.
Why Webhooks Feel Hard In Local Development
Webhooks feel hard locally because you are debugging two machines, a public URL, raw request bytes, signatures, retries, and your own handler at the same time.
The Web Platform Is Full Of Security Features That Look Like Bugs
How I debug browser security features that look like broken code: CORS, SameSite cookies, mixed content, CSP, iframe permissions, and isolation headers.
Stop Fixing CORS By Disabling CORS
CORS errors usually mean the browser is enforcing the API contract your server declared. Fix the contract instead of turning the check off.
Your Browser Is Not Your Backend’s Bodyguard
Browsers enforce useful security rules, but your backend still has to authenticate, authorize, validate, rate limit, and reject direct API calls.
Coding Agent Skills vs Slash Commands, MCP, and CLI Tools
How I decide whether a coding-agent workflow belongs in a skill, slash command, MCP server, or plain CLI script.