build(deps): Bump jscpd from 4.0.5 to 4.2.4

[dependabot]

Bumps jscpd from 4.0.5 to 4.2.4.

Release notes

Sourced from jscpd's releases.

jscpd v4.2.0

Breaking Changes

• Vue SFC tokenization — .vue files are no longer tokenized as markup. Each block is now dispatched to its own sub-format: <script> → javascript, <script lang="ts"> → typescript, \<template> → markup, <style> → css, <style lang="scss"> → scss, <style lang="less"> → less. Clone reports for .vue files now appear under these resolved sub-format names. Any tooling or configuration that relied on .vue clones being reported under markup must be updated.
• --formatsExts users — custom mappings that pointed .vue to markup (e.g. "formatsExts": { "markup": ["vue"] }) will no longer take effect because .vue is handled by the dedicated vue format processor. Remove or update such mappings.

New Features

• Custom tokenizer backend — replaced the prismjs npm package with a self-contained reprism-based grammar engine. ~11.5% faster tokenization on real projects (avg 1126 ms → 997 ms on a 548-file, 223-format scan).
• Cross-format detection — Vue SFC (.vue), Svelte (.svelte), Astro (.astro), and Markdown files are now tokenized per-block/per-section. A <script> block in a .vue file can match a .ts file; a fenced code block in Markdown can match a .py file.
• 223 supported formats — Apex, CFML/ColdFusion, GDScript, Svelte, Astro, and 70+ additional languages added (up from 152). See https://github.com/kucherenko/jscpd/blob/HEAD/supported_formats.md.
• Shebang detection — extensionless executable scripts (e.g. /usr/bin/env python3) are auto-detected by their #! shebang line and tokenized in the correct language.
• --store-path — configure a custom directory for the LevelDB cache, eliminating collisions when multiple jscpd processes run in parallel on the same machine.
• --skipComments — shorthand flag for --mode weak, which strips comments before detection.
• --formats-names — map specific filenames (e.g. Makefile, Dockerfile) to a detection format.

Bug Fixes

• Entire-file duplicates silently dropped (@jscpd/core #728) — RabinKarp flushed the pending clone on a store hit at end-of-file instead of on a miss. Files that are complete copies of each other were undetected. Fixed.
• ReDoS hang on Lisp/Elisp files (@jscpd/tokenizer #737) — the Lisp string regex /"(?:[^"\\]*|\\.)*"/ could catastrophically backtrack (O(2ⁿ)) on unterminated strings. Replaced with a linear /"(?:[^"\\]|\\[\s\S])*"/ pattern.
• Process crash on malformed package.json (#739) — readJSONSync threw an unhandled SyntaxError when package.json contained invalid JSON, killing the process. Now emits a warning and continues with an empty config.
• Vue SFC cross-file detection broken — the detector used the file-level format (vue) as the store namespace for all SFC blocks, preventing a <script> block in one .vue file from ever matching a <script> block in another. The namespace now reflects each block's resolved sub-format.
• Vue SFC incorrect column numbers — tokens on the first line of a block carried block-relative column 1 instead of file-absolute column numbers. Fixed in @jscpd/tokenizer.
• 50 dependency security vulnerabilities remediated across the monorepo (Dependabot batches).

Known Limitations

• Malformed SFC blocks (e.g. unclosed tags, invalid attributes) are silently skipped and do not contribute tokens.

Changelog

Sourced from jscpd's changelog.

Changelog

All notable changes to jscpd are documented here. Releases follow Semantic Versioning.

---

4.2.0 — 2026-05-14

Breaking Changes

• Vue SFC tokenization — .vue files are no longer tokenized as markup. Each block is now dispatched to its own sub-format: <script> → javascript, <script lang="ts"> → typescript, \<template> → markup, <style> → css, <style lang="scss"> → scss, <style lang="less"> → less. Clone reports for .vue files now appear under these resolved sub-format names. Any tooling or configuration that relied on .vue clones being reported under markup must be updated.
• --formatsExts users — custom mappings that pointed .vue to markup (e.g. "formatsExts": { "markup": ["vue"] }) will no longer take effect because .vue is handled by the dedicated vue format processor. Remove or update such mappings.

New Features

• Custom tokenizer backend — replaced the prismjs npm package with a self-contained reprism-based grammar engine. ~11.5% faster tokenization on real projects (avg 1126 ms → 997 ms on a 548-file, 223-format scan).
• Cross-format detection — Vue SFC (.vue), Svelte (.svelte), Astro (.astro), and Markdown files are now tokenized per-block/per-section. A <script> block in a .vue file can match a .ts file; a fenced code block in Markdown can match a .py file.
• 223 supported formats — Apex, CFML/ColdFusion, GDScript, Svelte, Astro, and 70+ additional languages added (up from 152). See https://github.com/kucherenko/jscpd/blob/master/FORMATS.md.
• Shebang detection — extensionless executable scripts (e.g. /usr/bin/env python3) are auto-detected by their #! shebang line and tokenized in the correct language.
• --store-path — configure a custom directory for the LevelDB cache, eliminating collisions when multiple jscpd processes run in parallel on the same machine.
• --skipComments — shorthand flag for --mode weak, which strips comments before detection.
• --formats-names — map specific filenames (e.g. Makefile, Dockerfile) to a detection format.

Bug Fixes

• Entire-file duplicates silently dropped (@jscpd/core #728) — RabinKarp flushed the pending clone on a store hit at end-of-file instead of on a miss. Files that are complete copies of each other were undetected. Fixed.
• ReDoS hang on Lisp/Elisp files (@jscpd/tokenizer #737) — the Lisp string regex /"(?:[^"\\]*|\\.)*"/ could catastrophically backtrack (O(2ⁿ)) on unterminated strings. Replaced with a linear /"(?:[^"\\]|\\[\s\S])*"/ pattern.
• Process crash on malformed package.json (#739) — readJSONSync threw an unhandled SyntaxError when package.json contained invalid JSON, killing the process. Now emits a warning and continues with an empty config.
• Vue SFC cross-file detection broken — the detector used the file-level format (vue) as the store namespace for all SFC blocks, preventing a <script> block in one .vue file from ever matching a <script> block in another. The namespace now reflects each block's resolved sub-format.
• Vue SFC incorrect column numbers — tokens on the first line of a block carried block-relative column 1 instead of file-absolute column numbers. Fixed in @jscpd/tokenizer.
• 50 dependency security vulnerabilities remediated across the monorepo (Dependabot batches).

Known Limitations

• Malformed SFC blocks (e.g. unclosed tags, invalid attributes) are silently skipped and do not contribute tokens.

---

4.1.0 — 2026-05-09

New Features

• AI Reporter — new ai reporter that produces compact, token-efficient clone output specifically designed for feeding results into language models and AI tooling. Use --reporters ai to activate it.
• MCP Server enhancements — the Model Context Protocol server now exposes a jscpd://statistics resource and supports a recheck endpoint so AI agents can trigger a rescan without restarting the process.
• Apex & CFML language support — jscpd can now detect duplicate code in Salesforce Apex and ColdFusion Markup Language (CFML) files (closes #83, #619).
• GDScript support — detect copy-paste duplication in Godot Engine GDScript files.
• HTML reporter footer — the HTML report now displays a branded footer with the jscpd version and a sponsor link.
• --noTips flag — suppress the usage-tip messages that appear after a detection run.
• CI: Node.js 22.x / 24.x — continuous integration updated to test against the latest Node.js LTS and current releases.

... (truncated)

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[github-actions]

@dependabot merge

[codacy-production]

Up to standards ✅

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🟢 Metrics 0 complexity · 0 duplication

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_{TIP This summary will be updated as you push new changes.}

[codacy-production]

Pull Request Overview

This PR updates jscpd from 4.0.5 to 4.2.4. While the update meets the basic acceptance criteria, it introduces breaking changes regarding Vue SFC tokenization and extension mappings that have not been accounted for in the project configuration or verified through tests. If the project uses .vue files, reporting output formats will change. Additionally, the tool is currently installed as a production dependency rather than a development dependency, which should be addressed to optimize the production build environment.

About this PR

• The update from jscpd 4.0.5 to 4.2.4 includes breaking changes for Vue SFC tokenization and --formatsExts mappings. If the project relies on .vue files being reported as 'markup' or uses custom extension mappings, the CI pipeline or reporting tools may break. No corresponding configuration updates were included in this PR.

Test suggestions

• Verify that jscpd execution completes successfully on the current codebase without crashing on the new version.
• If the project contains .vue files, verify that duplication reports now categorize blocks as javascript/css/markup rather than just markup.

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Verify that jscpd execution completes successfully on the current codebase without crashing on the new version.
2. If the project contains .vue files, verify that duplication reports now categorize blocks as javascript/css/markup rather than just markup.

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[codacy-production]

_{⚪ LOW RISK}

Suggestion: jscpd is a static analysis tool and should typically be a devDependency rather than a production dependency. This avoids unnecessary overhead in production environments. Try running the following prompt in your coding agent: > Move the jscpd dependency from dependencies to devDependencies in package.json.