How-to
How to ship fast without a month-six rewrite
Ship fast by prompting in plain language, but make every change record the decision behind it and pass validation before it lands. Velocity stays; coherence stays. That discipline kept while building at prompt speed is Vibe-Engineering — the reason there's no month-six rewrite.
The month-six rewrite isn't caused by speed. It's caused by speed without memory: changes pile up, nobody recorded why, and the codebase quietly turns into a prototype with a login screen. Here's how to keep the velocity and skip the rewrite.
Why fast projects rot
Prototypes don't collapse because they were built quickly. They collapse because the reasoning behind each change vanishes the moment it's made. Six months in, nobody — human or agent — can say why the code does what it does, so the only honest move is to start over.
Vibe-Engineering fixes the cause, not the speed. You still build by describing what you want. The difference is that the why is captured as you go, and nothing coherence-breaking is allowed to merge in the first place.
- The rewrite is a memory problem, not a velocity problem.
- Decisions captured as you build mean the why survives the team that wrote it.
- Validation at submit keeps half-finished or contradictory work out of the trunk.
- 01
Describe the change before touching code
State what you want in plain language and get back the exact files and functions to touch, plus the decisions behind them. No grepping, no guessing — you start from context, not a blank slate, so the change fits the codebase that already exists.
- 02
Reuse before you rebuild
Before a line is written, the system surfaces the code and decisions that already solve the problem. Often the work you planned turns out to be done already. Extending what exists instead of duplicating it is the single biggest defense against the slow rot that ends in a rewrite.
- 03
Settle incompatible choices at intent, not at merge
When two plans conflict, the clash is surfaced and negotiated while it's still just intent — before either change exists as code. Contradictions get resolved when they're cheap, not discovered months later baked into shipped features.
- 04
Capture the decision with the change
Every change records the choice, the reasoning, and the alternatives ruled out, bound to the exact code. Foundational rules sit at a higher tier and can't be casually overridden. Years later, the why is still right there — which is what keeps a fast codebase legible instead of mysterious.
- 05
Validate before anything lands
On submit, your change has to cover the decision it claims and build and pass tests before it can merge. Nothing half-done or coherence-breaking reaches the shared trunk. This is the gate that turns 'we'll clean it up later' into 'it was clean when it landed.'
- 06
Merge and let it ship itself
A clean merge builds, validates, and deploys on its own — no separate pipeline. Deploys swap in with no downtime, a bad one rolls back, and a tagged prior state can be restored. Shipping fast and shipping safely stop being a tradeoff.
“The size cap blocked my edit and nudged me to extract a clean sibling file instead — it makes a bloated file shrink or hold, without ever penalizing you for adding real functionality.”
Related questions
Doesn't capturing decisions and validating every change slow me down?
No — you still build by prompting in plain language. The decision is recorded as you go, and validation runs on submit. The work you'd normally do later, badly or never, happens automatically and at the moment it's cheapest.
What actually prevents the month-six rewrite?
Two things working together: the why behind every change is captured and stays attached to the code, and nothing that breaks coherence can merge in the first place. The codebase you ship fast is the same one you can still extend a year later.
Keep reading
Vibe-Engineering
Many agents. One codebase. Zero collisions.
Point your agents at CatWrangler and build — the discipline runs underneath.