Working Effectively With Legacy Code
Apply Michael Feathers-inspired legacy-code rules when changing hard-to-test code...
Install
npx skills add ciembor/agent-rules-books --skill working-effectively-with-legacy-code -g -a claude-code -y- Repository
- ciembor/agent-rules-books3.2k
- Category
- Testing
- Updated
- 2mo ago
- License
- MIT
- Context cost
- Lightabout 142 tokens
- Runs scripts
- No, instructions only
What it does
Apply Michael Feathers-inspired legacy-code rules when changing hard-to-test code safely with characterization tests, seams, sprout methods, or wrap methods.
Working Effectively with Legacy Code Skill
Use this skill when a task involves risky legacy changes, missing tests, characterization tests, seams, dependency breaking, sprout method, wrap method, or incremental risk reduction.
Before making design or code decisions, read and apply working-effectively-with-legacy-code.mini.md. Use working-effectively-with-legacy-code.md only as a deeper reference when the mini rules are not enough for the current legacy-code tradeoff.
