[dependabot]

Bumps the dev-dependencies group with 4 updates: @mdx-js/mdx, @swc/core, @swc/core-linux-x64-gnu and jscpd.

Updates @mdx-js/mdx from 3.1.0 to 3.1.1

Release notes

Sourced from @​mdx-js/mdx's releases.

3.1.1

Fix

• 3cad7d7e @mdx-js/mdx: add dependency on acorn
• 0dc4472f @mdx-js/esbuild: fix crash with esbuild loader and jsx option by @​egnor in mdx-js/mdx#2593
• 84ec66ef @mdx-js/esbuild: refactor to improve error conversion in esbuild by @​egnor in mdx-js/mdx#2595
• 2b3381a8 @mdx-js/rollup: fix support for query parameters in Vite by @​markdalgleish in mdx-js/mdx#2629

Types

• 933ab444 @mdx-js/mdx: add attributes to export/import declarations

Docs

• c156a1f6 Add rehype-mdx-toc to list of plugin by @​boning-w in mdx-js/mdx#2622
• 913659c8 Add recma-module-to-function to list of plugins by @​remcohaszing in mdx-js/mdx#2605
• 67fb1d07 Remove unneeded JSX type casting in docs, tests
• f0d20da8 Remove local use of JSX by @​remcohaszing in mdx-js/mdx#2604
• 63f39cea Remove references to twitter
• 35ac59dd Refactor some docs regarding recma plugins

Full Changelog: mdx-js/mdx@3.1.0...3.1.1

Commits

• 50aa8df 3.1.1
• 3cad7d7 mdx: add dependency on acorn
• def2cba Update dev-dependencies
• 933ab44 Add attributes to export/import declarations
• 35ac59d Refactor some docs regarding recma plugins
• e587c8c Update remark-preset-wooorm
• d3b2f3d Update dev-dependencies
• See full diff in compare view

Updates @swc/core from 1.16.18 to 1.16.20

Changelog

Sourced from @​swc/core's changelog.

[1.16.20] - 2026-10-22

Bug Fixes

• (es/codegen) Disambiguate TSX generic arrows (#12505) (2c9d198)

• (es/codegen) Preserve non-null token boundaries (#12504) (410ae3a)

• (es/codegen) Parenthesize typed arrow parameters (#12503) (aa1ffd6)

• (es/codegen) Preserve TypeScript token boundaries (#12523) (9f36ae0)

• (es/codegen) Emit space after div if rhs starts with a regex (#12544) (dddf716)

• (es/codegen) Preserve optional call type arguments (#12549) (f7bef4d)

• (es/compat) Scope private access modes to each member (#12526) (c0e3fa1)

• (es/fixer) Preserve TypeScript expression grouping (#12518) (b9d3f8f)

• (es/fixer) Preserve TypeScript operand grouping (#12539) (7c4a214)

• (es/fixer) Avoid panicking on recovered parenthesized assignment targets (#12551) (ec34371)

• (es/fixer) Preserve optional chain boundaries (#12550) (01d5630)

• (es/fixer) Wrap function declarations in sloppy-mode loop bodies (#12567) (76ff943)

• (es/minifier) Bound literal expressions copied by the sequential inliner (#12521) (60c700f)

• (es/minifier) Preserve rest array identity when its reference runs more than once (#12546) (4768dbe)

• (es/minifier) Keep trimLeft and trimRight on string literals (#12574) (663ffb0)

... (truncated)

Commits

• 566c595 chore: Publish 1.16.20 with swc_core v82.2.0
• 196ac57 chore: Publish 1.16.20-nightly-20261022.1 with swc_core v82.2.0
• 6d71046 chore: Publish 1.16.19-nightly-20261015.1 with swc_core v82.1.1
• See full diff in compare view

Updates @swc/core-linux-x64-gnu from 1.16.18 to 1.16.20

Changelog

Sourced from @​swc/core-linux-x64-gnu's changelog.

[1.16.20] - 2026-10-22

Bug Fixes

• (es/codegen) Disambiguate TSX generic arrows (#12505) (2c9d198)

• (es/codegen) Preserve non-null token boundaries (#12504) (410ae3a)

• (es/codegen) Parenthesize typed arrow parameters (#12503) (aa1ffd6)

• (es/codegen) Preserve TypeScript token boundaries (#12523) (9f36ae0)

• (es/codegen) Emit space after div if rhs starts with a regex (#12544) (dddf716)

• (es/codegen) Preserve optional call type arguments (#12549) (f7bef4d)

• (es/compat) Scope private access modes to each member (#12526) (c0e3fa1)

• (es/fixer) Preserve TypeScript expression grouping (#12518) (b9d3f8f)

• (es/fixer) Preserve TypeScript operand grouping (#12539) (7c4a214)

• (es/fixer) Avoid panicking on recovered parenthesized assignment targets (#12551) (ec34371)

• (es/fixer) Preserve optional chain boundaries (#12550) (01d5630)

• (es/fixer) Wrap function declarations in sloppy-mode loop bodies (#12567) (76ff943)

• (es/minifier) Bound literal expressions copied by the sequential inliner (#12521) (60c700f)

• (es/minifier) Preserve rest array identity when its reference runs more than once (#12546) (4768dbe)

• (es/minifier) Keep trimLeft and trimRight on string literals (#12574) (663ffb0)

... (truncated)

Commits

• 566c595 chore: Publish 1.16.20 with swc_core v82.2.0
• 799713d chore: Update changelog
• 196ac57 chore: Publish 1.16.20-nightly-20261022.1 with swc_core v82.2.0
• 9c5b1df docs: Add CodSpeed sponsor logo to README (#12590)
• ee2cd8a ci: require changesets for crate changes (#12583)
• 1744d5f chore: Publish crates with swc_core v82.2.0
• b5a52b9 fix(es/minifier): release utils API required by registry builds (#12582)
• f5e8a35 chore: Publish crates with swc_core v82.1.2
• 8f06994 fix(es/minifier): Preserve new async and generator (#12558)
• fd0edaf fix(es/minifier): keep directive prologue when merging if returns (#12580)
• Additional commits viewable in compare view

Updates jscpd from 5.4.1 to 5.4.2

Release notes

Sourced from jscpd's releases.

Release v5.4.2

The post What's new in jscpd 5.4.2 shows the new features with commands and real output.

New Features

• Boundaries keep the code of a module inside it. The new boundaries key of the config file lists rules. A rule names the code it protects (code: a folder, a file, a glob, or a method as path#name), where copies of it must not show up (notIn, or every file outside code when it is left out) and where they may after all (allow). Every clone run checks the rules, and a copy of protected code outside its boundary fails the run with exit code 1. Import linters miss such copies, because a copied function imports nothing.

  • jscpd looks for copies three ways, and a rule can set its own bars in thresholds. Token clones find copy-paste, the structure comparison of --similarity finds an edited copy, and the --semantic model finds the same logic written again, often in another language. disable turns kinds off by their --kind names. Without a downloaded model, jscpd prints a warning and checks the rules without the semantic search.
  • A mistake in a rule, such as an unknown key or a glob that doesn't compile, stops the run with an error that names the rule. A rule that checks nothing in a run, after a typo in a path or a method name for example, gets a warning.
  • The console, console-full, ai and json reporters show the violations, the json one under boundaries. Baselines and --changed don't apply to violations yet, and SARIF, the language server and the MCP server don't report them.
  • fixtures/boundaries-demo is a small shop whose web app copies the backend's pricing and loan code. (#1225, #1227)

• --ignore-identifiers pairs a name with one name. Every name used to match every other name, so x = x + x * x was a clone of d = a + b * c, although its data flows another way. Now a name on one side has to stand for the same name on the other side every time, and two names can't stand for one, as in Baker's parameterized matching and NiCad's consistent renaming. On 24 projects in 11 languages, 6,942 of the 14,501 renamed clones that the old matching reported had no such mapping.

  • jscpd cuts a clone where a name starts to stand for two and still reports every part of --min-tokens tokens or more.
  • A name reached as a member, after . or ?., and after -> in C, C++, PHP and Perl, is another name than a local of the same text. A constructor that sets this.url = url still matches its copy that sets this.url = link (#1220).
  • --ignore-identifiers and --ignore-identifiers=consistent give the new matching, --ignore-identifiers=blind the old one. The config takes "ignoreIdentifiers": true, "consistent" or "blind", and the Action input takes consistent or blind. The value goes after = only, so --ignore-identifiers src/ still scans src/.
  • fixtures/type2-demo has the consistent and members examples. (#1217, #1218)

• --similarity pairs a name with one name too. The fingerprint of a subtree now records how its names repeat, so x = x + x * x no longer scores 1.0 against d = a + b * c, and a renamed copy still does. Members, labels such as keyword arguments and object keys, and types each have names of their own, so self.url = url still matches self.url = link. A function's own name matches any name. Kotlin's true, false and null and Clojure's true, false and nil are literals now. On the same 24 projects, 15 of 23,530 pairs fell below 0.8, and runs take 2 to 9% longer. --ignore-identifiers=blind brings back the old scores and also turns on renamed token clones. fixtures/similarity-demo/names scores a renamed copy at 1.00 and a mirrored function at 0.74. (#1219)

• --history tracks the health score, and a bare --history walks the last 30 commits. Every commit of the series gets the score that jscpd --health gives its tree. The console draws a health chart under the duplication chart and adds HEALTH and CHANGE columns, and every point of the JSON report has health. --health and --dashboard take --history now: the badge or the dashboard comes first, then the series, in the markdown and html reports too.

  • jscpd --history used to fail with "a value is required". Without a value the flag takes the config's history, or else the newest 30 commits of HEAD (--history-limit). --history-every N spaces them N commits apart, and the Action's history input takes true.
  • jscpd scans a commit the way it scans the working tree: --ignore and --pattern see its files at their working-tree paths, and the checkout runs none of the repository's hooks. A walk that stops at the edge of a shallow clone prints a warning that names the commit.
  • The last 30 commits of axios take about 5.4 seconds, against 4.9 without the health score. (#1199)

• jscpd knows 73 more formats by extension, and files by name. 94 of 224 formats had no built-in extension, a gap that came from v4, so jscpd . skipped Dockerfiles, Makefiles, go.mod, Elixir and Nix files unless you mapped them. The new extensions come from GitHub Linguist, and a table of file names maps Dockerfile, Containerfile, Makefile, go.mod, CMakeLists.txt, Gemfile, Jenkinsfile and others. Existing formats got more suffixes, such as .zsh, .jsonc, .tfvars and .sbt. A Markdown fence such as ```dockerfile takes its format from the same table, and --formats-exts and --formats-names still win over every built-in mapping. FORMATS.md lists the file names too. (#1174, #1192)

Changes

• jscpd . scans more files. On 22 repositories the new file associations picked up 1 to 5 more files each, mostly Dockerfiles, .editorconfig, .jsonc, Makefiles and go.mod, and jscpd scans the .rst files of Sphinx docs like Markdown. The duplication percentage can move, and a --threshold gate can fail. (#1192)

• --ignore-identifiers reports fewer renamed clones, and some of them are shorter. A baseline that 5.4 made with --ignore-identifiers is a blind one. Keep --ignore-identifiers=blind with it or update the baseline, or --fail-on-new-clones reports the cut clones as new. (#1218)

• --history walks first parents. A merged branch counts as its merge commit, so a range across merged branches gives fewer points than before. jscpd builds a series only when a reporter shows it (console, console-full, ai or json, and markdown or html with --health or --dashboard), so a badge-only --health job no longer walks the range. The ai lines read 37be780 2026-08-08 2/1/47.6 +47.6 health 72 -2 now, and a wrong health or dead-code option no longer fails a clone run. (#1199)

Bug Fixes

• jscpd aborted on a Markdown page whose front matter ran into a code fence. A page that opens with a horizontal rule and later shows a Python stub had front matter from the rule down to the stub's ..., across the fence, and the scan panicked: jscpd exited with 134, and jscpd --mcp and jscpd --lsp died. A --- on the first line now opens front matter only when the next line isn't blank, as Pandoc reads it, and only a --- or ... line before the first code fence closes it. The frontmatter of an Astro component follows the same rule. A page of code fences that never close used to take quadratic time, 3.9 seconds for 100 KB, and takes 0.04 seconds now. (#1223, #1226)

• A Razor view was read out of order. jscpd tokenized the HTML of a whole view and then the C# of its blocks, so a clone across that seam ended before it started: release builds printed ranges such as [48:48 - 5:35], and debug builds panicked. A view is now one stream in the order of its text. Two identical views count as duplicated from the first line to the last, and markup in an @if or @foreach block matches the same markup outside one. (#1221, #1222)

• The MCP server's check_duplication never matched a Vue, Svelte or Astro snippet. It tokenized a snippet as one stream, while a scan splits a component into its blocks and a Markdown file into its prose and fences. A component snippet met only the components inside Markdown fences, by meaning it found nothing, and the fences of a Markdown snippet matched nothing either. The server now splits a snippet the way a scan splits a file of its format. Each match has format and lines, and the note names every block too short to match. #1228 also fixed how jscpd counts the duplicated lines of a clone whose two fragments swap places, so the statistics of a --cross-formats run can change a little. (#1224, #1228, #1229)

• --history failed when git's log.showSignature was on. git printed the signature check of each signed commit before the commit, and jscpd took that line for a commit hash. jscpd now passes --no-show-signature and reads only lines that start with a commit hash. Reported with an exact reproduction by @​vitorcsbrito. (#1195, #1196)

• --compare paired a function with every near-best lookalike. It took the rule of --semantic, where a group of near-equal functions all pair with each other, but in a port a function has one counterpart. A pair now stays only when it is the best match of one of its two functions, and a near tie goes to the partner in a file of the same name. On the analysis modules of Lucene and Lucene.NET the pairs went from 2,219 to 1,392, and the share of pairs between files of the same name from 46% to 73%. Analysis and numbers by @​MysterionRise. (#1162, #1194)

• --semantic reported a page and the component it renders as a clone. It skips a pair when one function calls the other, but it didn't count a JSX element such as <EditUserForm /> as a call. It does now, and so does the call graph of --compare. Reported by @​Rosenblad, fixed by @​cristianchiriac. (#1210, #1211)

• Reports named a clone in a Markdown block or a component like guide.md:markup. The VS Code extension opened that name as a file and failed. The JSON name, the language server's jscpd/clones and jscpd/semantic, the XML path and the xcode location now name the file, and the JSON keeps the block's language in format. The console, ai and HTML reports still name the block. (#1200)

... (truncated)

Commits

• db415b5 release: cpd-v5.4.2
• See full diff in compare view

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d47c266

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