How to Vibe-Code Without Creating Technical Debt

"Vibe coding" — the term Andrej Karpathy coined on 2 February 2025 for letting an AI agent generate code while you "fully give in to the vibes... and forget that the code even exists" — is fast, fun, and quietly expensive. The speed is real, but so is the bill that arrives later. The job of this checklist is to keep the speed without signing up for the debt.

Technical debt is the future cost of shortcuts you take now: duplicated logic, untested paths, missing context, dependencies nobody vetted. AI agents are unusually good at manufacturing it, because they optimize for code that looks plausible right now, not for a codebase that stays maintainable in six months.

What the data actually shows

The warning signs are measurable, not anecdotal. GitClear's 2025 "AI Copilot Code Quality" report, which analyzed 211 million changed lines of code from 2020 to 2024, found that copy-pasted ("cloned") lines rose from 8.3% of changed lines in 2021 to 12.3% in 2024 — and that copy-pasted code exceeded refactored ("moved") code for the first time in the company's history. Over the same window, the share of refactoring activity fell from roughly 25% of changes to under 10%. In plain terms: more pasting, less consolidating. That is the shape of debt accumulating.

Google's 2024 DORA "Accelerate State of DevOps" report (surveying over 39,000 professionals) found that AI adoption was associated with worse system-level outcomes even as individual artifacts improved: a 25% increase in AI adoption correlated with an estimated 7.2% drop in delivery stability and a 1.5% drop in throughput, while documentation and code quality nudged up. Speed at the keyboard does not equal speed shipping to production.

The 70% trap

Addy Osmani, who leads developer-experience work on Google Chrome, named the core failure mode in December 2024: the "70% problem." AI gets you about 70% of the way to a working feature astonishingly fast, but the final 30% — edge cases, error handling, security, production hardening — becomes "an exercise in diminishing returns." Worse, fixing one AI-introduced bug often spawns others, a "two steps back" loop. The debt lives almost entirely in that last 30%, which is exactly the part vibe coding tends to skip.

The anti-debt checklist

Use the table below as a gate, not a wish list. Each row is a practice with a concrete trigger and the failure it prevents. The "Authority" column names who recommends it, so you can read the primary source rather than take it on faith.

Treat the agent's output as a first draft

The single mindset shift that prevents most AI-induced debt is to stop treating generated code as finished. Anthropic's Claude Code documentation explicitly calls out the "trust-then-verify gap" — the agent "produces a plausible-looking implementation that doesn't handle edge cases" — and its fix is blunt: "If you can't verify it, don't ship it." It recommends an explore → plan → code → commit workflow and even an adversarial review step where a fresh, un-biased session reviews the diff before the work counts as done.

This mirrors how senior developers already treat junior output: useful, fast, and never merged unread. The agent is the typist; you remain the engineer of record.

FAQ

Is all AI-assisted coding "vibe coding"? No. As Simon Willison argues, if you reviewed, tested, and understood the code, you used the LLM as a typing assistant — that is software development, not vibe coding. Vibe coding specifically means not reviewing the output.

Does refactoring AI code defeat the speed benefit? Partly, and that is the point. The GitClear and DORA data suggest the realistic gain is on first-draft generation, not on shipped, stable software. Budgeting time to consolidate is how you keep the gain without the debt.

How do I stop the agent from inventing packages? Verify existence before install. USENIX Security 2025 research found that across 16 models, 19.7% of recommended packages did not exist — and attackers register those invented names. Never run an install command you haven't sanity-checked.

What is the one habit with the highest payoff? Reading every diff. It is the gate that catches almost every other failure mode before it becomes debt.

Bottom line

Vibe coding earns its speed on the first 70% and charges interest on the last 30%. The fix is not to stop using agents — it is to keep the human in the loop where judgment lives: review every diff, demand verification, refactor the first draft, and vet dependencies. Do that, and the agent stays a force multiplier instead of a debt engine.

Sources and further reading