Everything we've learned using coding agents.

Useful AI-engineering-adjacent terms for your reference.

Agentic engineering

Building software by directing agents that plan, edit, run and check their own work, instead of typing every change yourself. The job moves from writing to specifying and reviewing.

Context rot

The slow drop in quality as a long session fills up with stale detail. Starting fresh with the right three files usually beats carrying on.

Context window

How much text a model can hold in mind at once.

Determinism

This is when the same input yields the same output every time. LLMs are not deterministic by nature, but can be brought closer to that by e.g. prompting or providing them with callable tools.

Eval

A repeatable, scored test for a model or an agent. Without one, "it feels smarter" is your only metric, and it's wrong about as often as it's right.

Guardrails

What a change has to survive before it counts: types, tests, lint, a staging gate. Agents move fast enough that the gate is the design.

Harness

The code around the model: the tools it can call, the files it can see, the limits it runs under. Most of what people call model quality is actually harness quality.

Model Context Protocol (MCP)

A widely-adopted standard for enabling LLMs to integrate with external tools and data sources.

One-shot

Getting a whole task right from a single prompt, without follow-ups.

Prompt-to-PR

The loop from an instruction to a diff someone can review.

Slop

Unreviewed AI-authored output that might work, but it's not necessarily good long term and/or is largely not human-digestible.

Subagent

A second agent with its own clean context, handed one narrow job so its output doesn't flood the main session.

Token

The unit models read, write and bill in — roughly a word-piece. Both your cost and your context are counted based on these.

Vibe coding

Prompting your way to working software without reading most of what came back. Fast for a demo, expensive the moment someone else has to maintain it.

Here are some of our tools that we created just because we needed. We hope you will find them useful too.

• supabase-plusBatteries-included command-line utility that extends the official Supabase CLIREPO →READ THE WRITE-UP →
• htmlrecRender HTML animations to video — frame-perfect, headless and deterministicREPO →READ THE WRITE-UP →
• cant-happenA lib and a manifesto of panicking gracefully and only if it can't happenREPO →
• vue-modalVue version of our modal lib; call the collector globally, define a modal, trigger in typed wayREPO →

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