Cite as: Real Problem AI problem “Someone opened a function to fix one bug and it was 300 lines nobody wrote by hand.”. Opportunity score 9.0 out of 10 (severity 8, AI feasibility 8, market signal 9, competition gap 8). Category AI / Agents. Trend LLM. Source signal: Vibe-coding technical-debt reporting, May 2026.. Canonical URL: https://www.realproblem.ai/archive/why-is-the-bug-fix-a-300-line-function-nobody-wrote-by-hand.
Someone opened a function to fix one bug and it was 300 lines nobody wrote by hand.
AI-generated code ships fast, then the team inherits sprawling functions no human can safely change.
Who has it: Eng leads and maintainers inheriting vibe-coded codebases.
- Severity8/10
- Feasible today8/10
- Market signal9/10
- Competition gap8/10
What people report
Teams describe bug fixes that land in long AI-generated functions that nobody on the team can confidently explain or safely change.
Our summary of the public post linked below, not a quote. Nobody submitted it to Real Problem AI.
Vibe-coding technical-debt reporting, May 2026.What nothing does yet
A maintainability map that flags AI-generated hotspots by blast radius and proposes safe, tested refactors before the next change lands on top.
Tools that solve this
3 named so far, and where each one stops.
- SonarQube / linters
Style and complexity flags, no AI-provenance view.
- Copilot / Cursor
Generate the debt, do not map it.
- Code review
Humans skim AI diffs they did not write.
Why it is archived
Retired in the 25 October 2026 freshness refresh: an older or overlapping problem replaced by a newer one people are discussing now.
How you might build it
- 01AST + git-blame provenance
- 02LLM refactor proposer with tests
- 03Complexity + blast-radius scoring
- 04CI gate
Founders working in this area
- Harjot Gill, Co-founder and CEO, CodeRabbit
Not affiliated with Real Problem AI.
#AI20 · Canonical URL: https://www.realproblem.ai/archive/why-is-the-bug-fix-a-300-line-function-nobody-wrote-by-hand