Legacy Code Hotspot and Refactor Sequencer
Prioritize legacy-code improvements using defect history, change frequency, complexity, coupling, business impact, and migration risk.
Legacy Code Hotspot and Refactor Sequencer is a free AI skill for code improvement. Prioritize legacy-code improvements using defect history, change frequency, complexity, coupling, business impact, and migration risk. It works with Claude, ChatGPT and is ready to use out of the box.
About this skill
Create a safe refactoring roadmap for a legacy codebase without recommending a rewrite by default. The skill combines technical hotspots with business criticality, ownership, test coverage, dependencies, release constraints, and rollback needs.
What it does
It identifies the most valuable refactor targets, defines safe seams and sequence, protects behavior with tests, and creates an incremental migration roadmap.
What is included
- Codebase and dependency map
- Hotspot scoring
- Business-criticality review
- Test and observability gaps
- Refactor candidates
- Sequencing and dependency plan
- Strangler and seam options
- Rollback strategy
- Acceptance criteria
- Technical-debt roadmap
How to use it
1. Download the legacy-code-hotspot-and-refactor-sequencer-SKILL.md file 2. Upload it to Claude, ChatGPT, or your engineering workspace 3. Provide architecture, repository evidence, defect history, change patterns, tests, and business constraints 4. Do not paste production secrets or private customer data 5. Review the roadmap with maintainers before changing production code
Examples
Prioritize refactoring in a React and Supabase application with duplicated data loaders, a 1,600-line admin component, fragile route generation, and frequent SEO regressions.
A hotspot matrix, risk and value scores, dependency map, test gaps, phased refactor sequence, safe seams, migration steps, rollback plans, and measurable acceptance criteria.
FAQ
Does the skill recommend rewriting the application?
What makes code a hotspot?
Can it work without code metrics?
Does it include testing strategy?
How are dependencies handled?
How is this different from a code review?
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Related Prompts
Legacy Code Explainer & Refactor Planner
Explains what an unfamiliar or legacy piece of code actually does, then proposes a safe, incremental refactor plan instead of a risky full rewrite.