RefactorRisk: Code Churn vs. Bug Density Correlation Mapper for Solo Codebases

The Problem

Solo developers on HN and r/programming repeatedly describe the same fear before touching legacy code: they don't know which files are 'cursed' — high churn, high bug history, zero tests — versus which are safe to modify. RefactorRisk connects to a GitHub repo, maps commit frequency against issue/PR bug tags over time, and produces a file-level risk heatmap with a prioritized 'touch this last' refactor sequence so solo devs can plan upgrades without accidentally detonating production.

Target Audience

Solo developers and small engineering teams maintaining 1-5 year old production codebases

Monetization Angle

Freemium — free for 1 public repo; $15/mo for private repos and team seats up to 3

Recommended Tech Stack

Why Now

The explosion of AI-assisted vibe-coded codebases means more solo developers are inheriting or maintaining code they didn't write, and the inherited-codebase dread thread is perennial on HN.

MVP Scope

GitHub OAuth login, repo selection, and a single heatmap page showing files ranked by commit frequency × linked bug count with a one-paragraph plain-English risk summary per top-10 file.

AI Angle

LLM reads commit messages and PR descriptions to classify changes as bug-fix vs. feature vs. refactor, making the churn signal far more accurate than raw commit count alone.

Primary Risk

GitHub API rate limits and the need to parse issue/PR text for bug signals means false positives could erode trust; accuracy on messy repos is the core technical risk.

Validation Checklist

• Post the concept on r/programming and r/ExperiencedDevs asking 'would you pay $15/mo to know which files to avoid before a big refactor?'
• Build a free static version that analyzes a public GitHub repo via URL and share it on HN Show HN — measure stars and email signups
• Reach out to 10 indie SaaS founders in the r/indiehackers 'built in public' community who've mentioned legacy code fear and offer free early access
• Track conversion from free public repo analysis to paid private repo subscription as the primary monetization signal

Who Would Pay For This

Likely buyers are engineering teams, platform leads, developer-experience teams, and technical founders. Start with Solo developers and small engineering teams maintaining 1-5 year old production codebases and look for teams already spending time or money on this workflow.

First 10 Users

Find the first 10 users by searching for recent complaints around "developer tools refactoring" in Hacker News, developer communities, GitHub issues, and niche Slack or Discord groups. Offer a concierge version first: manually solve the workflow for a few users, then automate only the repeated steps.

More Developer Search Paths

Why This Idea Has Legs

• Sourced from real discussions and complaints across Reddit and social media
• Cross-checked against recurring demand signals in the IdeaGenius archive
• Difficulty rated Medium — buildable by a solo developer or small team
• Clear monetization path from day one

Generate Your Full Project Spec

Get a complete blueprint for building this app — tech stack, database schema, API endpoints, go-to-market plan, and more. Generated by AI in seconds. Download as Markdown.