Taming Vibe-Coded Technical Debt: Automated Test Harnesses for AI-Generated Repos

Original Article published on ZeroLabs . Taming Vibe-Coded Technical Debt: Automated Test Harnesses for AI-Generated Repos Key Takeaway: A pragmatic strategy for refactoring AI-generated codebases, eliminating dead boilerplate, and establishing regression test harnesses before shipping to production. Structured verification, strict boundaries, and deterministic tooling prevent production failure. Implemented directly across the ZeroLabs and OpenClaw platform architecture. Image credit: labs.zeroshot.studio Why this matters: Engineering reliable systems requires moving past unstructured prompts into hardened execution contracts. Contents What causes vibe-coded technical debt? How do you build a safety test harness? What is the 4-step refactoring loop for AI code? How do you clean dead dependencies and boilerplate? FAQ What causes vibe-coded technical debt? AI coding models are optimized to satisfy the user's immediate prompt. When asked to add a feature, models often take the path of least resistance: Copy-Pasting Logic : Duplicating utility functions across multiple files rather than importing shared modules. Swallowing Errors : Wrapping fragile database or network calls in broad try/except: pass blocks. Dependency Sprawl : Installing heavy npm packages or Python libraries for trivial single-line operations. flowchart TD A[Vibe Coded Prototype] --> B[Generate Smoke & Contract Tests] B --> C[Run Static Analysis & Linters] C --> D[Identify Duplication & Dead Imports] D --> E[Scoped AI Refactor on Single Module] E --> F[Run Test Suite] F -->|Pass| G[Commit Refactor] F -->|Fail| E How do you build a safety test harness? Before asking an AI agent to clean up or refactor an existing repository, you must write automated smoke tests that verify critical user journeys. If you don't have tests, ask the agent to write tests before modifying any implementation code: # tests/test_smoke_endpoints.py import pytest import httpx BASE_URL = ' http://localhost:3000 ' def test_homepage