finding-duplicate-functions
Use when auditing a codebase for semantic duplication - functions that do the same thing but have different names or implementations. Especially useful for LLM-generated codebases where new functions are often created rather than reusing existing ones.
npx skills add majiayu000/claude-skill-registry --skill finding-duplicate-functions --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Finding Duplicate-Intent Functions ## Overview LLM-generated codebases accumulate semantic duplicates: functions that serve the same purpose but were implemented independently. Classical copy-paste detectors (jscpd) find syntactic duplicates but miss "same intent, different implementation." This skill uses a two-phase approach: classical extraction followed by LLM-powered intent clustering. ## When to Use - Codebase has grown organically with multiple contributors (human or LLM) - You suspect utility functions have been reimplemented multiple times - Before major refactoring to identify consolidation opportunities - After jscpd has been run and syntactic duplicates are already handled ## Quick Reference | Phase | Tool | Model | Output | |-------|------|-------|--------| | 1. Extract | `scripts/extract-functions.sh` | - | `catalog.json` | | 2. Categorize | `scripts/categorize-prompt.md` | haiku | `categorized.json` | | 3. Split | `scripts/prepare-category-analysis.sh` | - | `categories/*.json` | | 4. Detect | `scripts/find-duplicates-prompt.md` | opus | `duplicates/*.json` | | 5. Report | `scripts/generate-report.sh` | - | `report.md` | ## Process ```dot digraph duplicate_detectio
- Overview
- When to Use
- Quick Reference
- Process
- Phase 1: Extract Function Catalog
- Phase 2: Categorize by Domain
- Phase 3: Split into Categories
- Phase 4: Find Duplicates (Per Category)
- Phase 5: Generate Report
- Phase 6: Human Review
- High-Risk Duplicate Zones
- Common Mistakes
- How to use this skill
What does the finding-duplicate-functions skill do?
Use when auditing a codebase for semantic duplication - functions that do the same thing but have different names or implementations. Especially useful for LLM-generated codebases where new functions are often created rather than reusing existing ones.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill finding-duplicate-functions --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.