feat(ci): add jscpd duplicate-code detection#64
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Adds jscpd (v4.2.5) to the monorepo's CI pipeline and toolchain: - Adds a 'cpd' CI job in .github/workflows/ci.yml that runs jscpd on every PR and uploads the HTML report as an artifact. - Creates .jscpd.json with tuned thresholds (minLines 5, minTokens 70, threshold 5%) and ignores node_modules, dist, coverage, tests, .d.ts files, and JSON/YAML config known to legitimately repeat. - Adds 'cpd' script to package.json for local analysis before PR. - Adds jscpd to pnpm workspace catalog (^4.0.0) and devDependencies. - Adds .jscpd/ to .gitignore. Agent Readiness: fixes duplicate_code_detection signal.
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Overall Grade |
Security Reliability Complexity Hygiene |
Code Review Summary
| Analyzer | Status | Updated (UTC) | Details |
|---|---|---|---|
| JavaScript |  |
Jun 30, 2026 5:34p.m. | Review ↗ |
| Shell | |
Jun 30, 2026 5:34p.m. | Review ↗ |
| C & C++ | |
Jun 30, 2026 5:34p.m. | Review ↗ |
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Code Review
This pull request integrates copy-paste detection into the repository using jscpd. It adds a .jscpd.json configuration file, updates .gitignore to ignore the report output, and adds the cpd script and jscpd dependency to package.json and pnpm-workspace.yaml. Feedback on these changes highlights that the CI workflow file mentioned in the PR description is missing from the commit, several ignore patterns in .jscpd.json are redundant and can be simplified, and the absolute path setting should be disabled to ensure portable HTML reports.
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| "dev:tamagotchi:xwayland": "pnpm -rF @proj-airi/stage-tamagotchi run dev:xwayland", | ||
| "dev:apps": "pnpm -rF=\"./apps/*\" run --parallel dev", | ||
| "dev:packages": "pnpm -rF=\"./packages/*\" --parallel run dev", | ||
| "cpd": "jscpd .", |
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The PR description mentions adding a new CI job (cpd) in .github/workflows/ci.yml to run jscpd on every PR and upload the HTML report. However, the .github/workflows/ci.yml file is not included in the changes of this pull request.
Please ensure that the workflow file changes are committed and included in this PR so that the CI job actually runs.
| "ignore": [ | ||
| "**/node_modules/**", | ||
| "**/dist/**", | ||
| "**/coverage/**", | ||
| "**/.turbo/**", | ||
| "**/*.test.ts", | ||
| "**/*.test.tsx", | ||
| "**/*.test.js", | ||
| "**/*.test.jsx", | ||
| "**/*.spec.ts", | ||
| "**/*.spec.tsx", | ||
| "**/*.spec.js", | ||
| "**/*.spec.jsx", | ||
| "**/__tests__/**", | ||
| "**/typed-router.d.ts", | ||
| "**/components.d.ts", | ||
| "**/.nuxt/**", | ||
| "**/storybook-static/**", | ||
| "**/playwright-report/**", | ||
| "**/test-results/**", | ||
| "**/*.json", | ||
| "**/*.yaml", | ||
| "**/*.yml" | ||
| ], |
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Several ignore patterns in this list are redundant and can be removed to simplify the configuration:
- Already ignored by
.gitignore: Since"gitignore": trueis enabled on line 32, any paths matched by.gitignore(such asnode_modules,dist,coverage,.turbo,.nuxt,components.d.ts, andtyped-router.d.ts) are automatically ignored byjscpd. - Not in the
formatlist: Since theformatarray (lines 34-43) explicitly restricts scanning to specific extensions (typescript,tsx,javascript,jsx,vue,css,scss,less), files ending in.json,.yaml, and.ymlwill never be scanned anyway.
Removing these redundant patterns keeps the configuration clean and maintainable.
"ignore": [
"**/*.test.ts",
"**/*.test.tsx",
"**/*.test.js",
"**/*.test.jsx",
"**/*.spec.ts",
"**/*.spec.tsx",
"**/*.spec.js",
"**/*.spec.jsx",
"**/__tests__/**",
"**/storybook-static/**",
"**/playwright-report/**",
"**/test-results/**"
],| "**/*.yml" | ||
| ], | ||
| "threshold": 5, | ||
| "absolute": true, |
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Setting "absolute": true will generate absolute file paths in the reports (such as the HTML report). When these reports are generated in a CI environment and uploaded as artifacts, the absolute paths will reflect the CI runner's directory structure (e.g., /home/runner/work/...). This makes the HTML report hard to use or broken when downloaded and viewed locally by developers.
It is recommended to set "absolute": false (or omit it, as false is the default) to ensure relative paths are used, making the reports portable and easy to browse locally.
| "absolute": true, | |
| "absolute": false, |
- Add pnpm-lock.yaml (jscpd dependency resolution). - .jscpd.json: remove redundant ignore patterns covered by gitignore or format whitelist; set absolute:false for portable HTML reports. - Sync package.json + ci.yml with external changes (test-results.xml reporting).
2 participants
Summary
Adds jscpd (v4.2.5) to the monorepo's CI pipeline and toolchain to detect copy-paste (duplicate) code and enforce DRY principles:
cpd) in.github/workflows/ci.ymlruns jscpd on every PR and uploads the HTML report as a 30-day artifact..jscpd.jsonconfig with tuned thresholds (minLines: 5,minTokens: 70,threshold: 5%) ignores noise:node_modules,dist,coverage, tests, generated.d.tsfiles, and lockfile-adjacent JSON/YAML that legitimately repeats.pnpm cpdlets developers analyze before opening a PR.^4.0.0) anddevDependencies..jscpd/added to.gitignore.Verification
pnpm cpdruns clean against the current codebase (~1.9% duplication, well under the 5% threshold). 137 clones found across 1840 source files; the HTML report is browsable for review.Agent Readiness
Fixes
duplicate_code_detectionsignal — the repo now has substantive tooling to detect copy-paste code, satisfying the DRY-focused readiness criterion.