The standard advice on “vibe coding” has settled into “just describe it to the agent,” and it is quietly wrecking performance and maintainability. I have spent 14 years building WordPress and WooCommerce systems and watched every magic bullet fail in much the same way. Vibe coding does not replace engineering. It is a fast tool that needs a steady hand on the wheel.
I thought I had seen every way a codebase could bloat until I watched an agent take on a simple checkout bottleneck last week. The fix was a database index. What it produced was a 500-line middleware layer built on three transients and a custom table. It worked, and it was a technical debt time bomb.
Garbage in, garbage out
The real risk with vibe coding is the illusion of progress. Tools like Cursor or Claude hand back structured code in seconds, and people stop reading it critically. Speed says nothing about correctness. Give an ambiguous prompt and you get a confident solution that looks professional and then falls over on a production edge case.
I wrote about the hard truth of AI in production a while back, and it applies here too. Prompting is requirements engineering wearing a different hat. If you cannot define the architecture yourself, the vibe drifts into over-engineering.
Why agents over-engineer everything
Left alone, an agent reaches for the most impressive architectural pattern rather than the simplest one. It looks fast early and stops being sustainable later, like sprinting a marathon. I have watched agents reach for “Agentic RAG” on data lookups that a plain WP_Query would have answered.
<?php
/**
* THE NAIVE "VIBE" APPROACH (Over-engineered)
* The agent decided to create a complex caching and sorting
* engine for something that should be a simple filter.
*/
function bbioon_overengineered_ai_search($query_vars) {
$transient_key = 'complex_ai_cache_' . md5(serialize($query_vars));
$cached_results = get_transient($transient_key);
if (false === $cached_results) {
// The agent adds 50 lines of "intelligent" sorting logic here
// that ignores standard WordPress hooks.
$results = bbioon_run_heavy_custom_sql($query_vars);
set_transient($transient_key, $results, HOUR_IN_SECONDS);
}
return $cached_results;
}
What you end up with is a site nobody can debug. Push the agent toward core WordPress functions first, and add transients once you have measured the bottleneck, not because caching feels like the right vibe.
Practices that keep vibe coding honest
- Never let the AI write code before it explains the plan. Use plan mode to critique the logic, and ask why it wants a new table when metadata would do the job.
- Tell the agent what should break it, then make it critique its own output. A second model, switching from Claude to GPT-4o for instance, will often catch the over-engineering in the first one’s code.
- Read the tool calls, not only the final file. If an agent is running a vector search for a simple taxonomy lookup, stop it there.
Keep in mind that vibe coding can break site stability when you get careless about race conditions in the backend. Agents are poor at predicting high-traffic load failures unless you prompt for that specifically.
Someone still has to decide
You are the architect. The AI is a junior developer with an endless library of snippets and no common sense whatsoever. Weighing cost against latency against maintainability is still a human call, and so is the final say on quality.
If this vibe coding stuff is eating your dev hours, hand it to me. I have been wrestling with WordPress since the 4.x days.
Keep your hand on the wheel
Vibe coding pays off when you steer harder. Let the AI write the boilerplate and a first pass at the architecture, then read every line of it yourself. If you cannot explain why a block of code exists, it does not belong in your production repo. Refactor until the change is surgical.
