jscpd 5.2.0 released

Published on September 8, 2026 by Andrey Kucherenko

jscpd 5.2.0 is out. This release is about finding the duplicates that an exact token match cannot see.

Type-2 clones. --ignore-identifiers, --ignore-literals and --ignore-annotations find blocks that differ only in names, values or annotations. Every clone now carries a kind: exact or renamed.
Near-miss clones. --max-gap-lines N merges a copy with a few inserted or changed lines into one clone with a similarity score, instead of reporting two halves.
Function-level similarity for JavaScript and TypeScript. --similarity 0.85 compares whole functions by their syntax-tree structure, so edits spread through a function are still caught. The MCP server takes the same argument.
Every reporter shows the clone kind, including SARIF and CodeClimate, and the MCP tools are fully described so agents know when to use each one.
Fixes: config-file ignorePattern entries without glob characters now work, JavaScript files with a recoverable syntax error match clean files again, Markdown no longer loses everything after a /* or //, Vue template clones get the template's own line range, and the tips are printed only on an interactive terminal.

Thanks to @7487, @zero-stroke, @kwesolowski and @w3lld1 for their contributions, and to every backer who keeps this work funded.

Install: npm i -g jscpd or cargo binstall jscpd