kucherenko/jscpd v4.2.0 on GitHub

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.

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 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.

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).

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