FlorianBruniaux source-command-tech-dupes
Use this skill when the user asks to run the migrated source command tech-dupes.
Command Template
Code Duplication Detector — StarMapper
Usage
/tech:dupes
What It Does
- Runs
pnpm dupes(jscpd) on thesrc/directory - Analyzes results against StarMapper-specific patterns
- Outputs structured report with action plan
Setup Check
If pnpm dupes is not configured, add to package.json:
"dupes": "jscpd src/ --threshold 3 --min-lines 5 --reporters console,json --output .dupes-report"
And install: pnpm add -D jscpd
StarMapper Duplication Patterns to Watch
| Pattern | Location | Risk |
|---|---|---|
location.toLowerCase().trim() |
geocoder, routes | Should exist ONLY in geocoder.ts |
| GitHub error parsing | github.ts, chunk/route.ts | Extract to github.ts |
| Compression/decompression logic | page.tsx, cache routes | Extract to lib/compression.ts |
checkDbHealth() call pattern |
user-cache, cache routes | OK if identical — it's a guard |
NextResponse.json({ error: ... }) patterns |
all routes | Accept duplication here |
cursor ? { cursor } : {} |
github.ts | Should only be in github.ts |
Thresholds
| Metric | Target | Action |
|---|---|---|
| Duplication % | < 3% | Above → refactor |
| Clone count | < 10 | Above → prioritize |
| Max clone size | < 25 lines | Above → extract function |
Output Format
## Duplication Report — StarMapper
**Date**: {date}
**Duplication**: X% ({target: < 3%})
**Clones found**: N
### Top Clones
1. [file:line] ↔ [file:line] — {N} lines
Pattern: {brief description}
Action: {extract to / delete duplicate}
### Action Plan
#### Quick Wins (< 30min)
1. ...
#### Refactoring (1-2h)
2. ...
#### Prevention
- Add `pnpm dupes` to CI check