All changes included in 1.9:

Shortcodes

• (#13342): Ensure that the contents shortcode works inside metadata.

• (#13489): Add mode=plain option to the kbd shortcode to render keyboard shortcuts exactly as written, without OS-specific symbol translation.

• (#14061): Fix meta shortcode not preserving line breaks in values. The shortcode now respects its usage context (block, inline, or text) and preserves paragraph breaks in block and code block contexts.

Regression fixes

• (#13396): Fix quarto publish connect regression.

• (#13441): Catch undefined exceptions in Pandoc failure to avoid spurious error message.

• (#13046): Use new url for multiplex socket.io server https://multiplex.up.railway.app/ as default for format: revealjs and revealjs.multiplex: true.

• (#13506): Fix navbar active state detection when sidebar has no logo configured. Prevents empty logo links from interfering with navigation highlighting.

• (#13616): Fix fatal error when rendering manuscript projects with custom blocks like ConditionalBlock.

• (#13625): Fix Windows file locking error (os error 32) when rendering with --output-dir flag. Context cleanup now happens before removing the temporary .quarto directory, ensuring file handles are properly closed.

• (#13633): Fix detection and auto-installation of babel language packages from newer error format that doesn't explicitly mention .ldf filename.

• (#13694): Fix notebook-view.url being ignored - external notebook links now properly use specified URLs instead of local preview files.

• (#13732): Fix automatic font package installation for fonts with spaces in their names (e.g., "Noto Emoji", "DejaVu Sans"). Font file search patterns now match both with and without spaces.

Dependencies

• Update pandoc to 3.8.3

  • (#13925): Pandoc 3.8.3 introduces ^[text]^ as inline footnote syntax. This conflicts with superscript containing a Span at the start (e.g., ^[text]{.class}^) since the ^[ sequence now triggers footnote parsing. A workaround is to insert a zero-width space or other invisible character between ^ and [.

• Update typst to 0.14.2

• Update esbuild to 0.25.10

• Update deno to 2.4.5

• (#13601): Update mermaid to 11.12.0 (author: @multimeric)

Formats

All Formats

• (#13878): Add syntax-highlighting option replacing the deprecated highlight-style in Pandoc 3.8. It supports style names (e.g., tango, github), custom .theme files, none to disable highlighting, or idiomatic for native format highlighting. The highlight-style option remains supported but is deprecated.

gfm

• (#13421): Do not word-wrap titles in header.

• (#13603): Fix callouts with title but no body content causing fatal error when rendering to GitHub Flavored Markdown.

email

• (#13882): Add support for multiple email outputs when rendering to format: email for Posit Connect.

• (#14021): Add email-version hook to override detected Connect version when rendering emails for Posit Connect.

• (#14098): Add support for dynamic email recipients computed via Python or R code.

html

• (#14072): Add q syntax files

• (#11929): Import all brand.typography.fonts in CSS, whether or not fonts are referenced by typography elements.

• (#13413): Fix uncentered play button in video shortcodes from cross-reference divs. (author: @bruvellu)

• (#13508): Add aria-label support to video shortcode for improved accessibility.

• (#13685): Fix remote font URLs in brand extensions being incorrectly joined with the extension path, resulting in broken font imports.

• (#13825): Fix column: margin not working with renderings: [light, dark] option. Column classes are now preserved when applying theme classes to cell outputs.

• (#13883): Fix unequal top/bottom spacing in simple untitled callouts.

• (#13900): Warn when renderings cell option contains duplicate names. Previously, duplicate names like [dark, light, dark, light] would silently use only the last output for each name.

• (#14065): Fix SCSSParsingError when custom SCSS themes contain non-ASCII characters in selectors (e.g., #présentation).

typst

• (#12803): Fix callout text being centered instead of left-aligned when callout has a cross-reference ID prefix (e.g., #tip-abc).

• (#13249): Update to Pandoc's Typst template following Pandoc 3.8.3 and Typst 0.14.2 support:

  • Code syntax highlighting now uses Skylighting by default.

  • New template variables mathfont, codefont, and linestretch for font and line spacing customization.

  • New template variables linkcolor, citecolor, and filecolor for link color customization.

  • New template variable thanks for title footnote acknowledgment.

  • New template variable abstract-title for abstract header customization.

  • PDF accessibility metadata: document title, author, and keywords are now set for PDF readers.

  • Two-column layout now uses set page(columns:) instead of columns() function, fixing compatibility with landscape sections.

  • Title block now properly spans both columns in multi-column layouts.

• (#13362): Remove unused blockquote definitions from template.

• (#13452): Wraps subfigure captions generated by quarto_super() in block function to avoid emitting par elements. (author: @christopherkenny)

• (#13474): Heading font for title should default to mainfont.

• (#13486): Update the Custom Typst Templates, which had been failing due to changes in the Typst language, to use the latest upstream packages and bundle them using typst-gather for offline use. (ams, dept-news, fiction, ieee, letter, poster)

• (#13555): Add support for icon=false in callouts when used in format: typst.

• (#13589): Fix callouts with invalid ID prefixes crashing with "attempt to index a nil value". Callouts with unknown reference types now render as non-crossreferenceable callouts with a warning, ignoring the invalid ID.

• (#13602): Fix support for multiple files set in bibliography field in biblio.typ template partial.

• (#13745): Fix relative font-paths from extensions or document metadata not resolving correctly for Typst compilation. Relative paths are now resolved against the document directory before being passed to the Typst CLI.

• (#13775): Fix brand fonts not being applied when using citeproc: true with Typst format. Format detection now properly handles Pandoc format variants like typst-citations.

• (#13868): Add image alt text support for PDF/UA accessibility. Alt text from markdown captions and explicit alt attributes is now passed to Typst's image() function. (Temporary workaround until jgm/pandoc#11394 is merged.)

• (#13870): Add support for alt attribute on cross-referenced equations for improved accessibility. (author: @mcanouil)

• (#13917): Fix brand logo paths not resolving correctly for Typst documents in project subdirectories. Brand logo paths are now converted to project-absolute paths before merging with document metadata, replacing the fragile projectOffset() workaround.

• (#13942): Fix Typst compilation errors showing confusing internal stack traces. Users now see only the relevant Typst error message.

• (#13950): Replace ctheorems with theorion package for theorem environments. Add theorem-appearance option to control styling: simple (default, classic LaTeX style), fancy (colored boxes with brand colors), clouds (rounded backgrounds), or rainbow (colored start border and colored title).

• (#13954): Add support for Typst book projects via format extensions. Quarto now bundles the orange-book extension which provides a textbook-style format with chapter numbering, cross-references, and professional styling. Book projects with format: typst automatically use this extension.

• (#13978): Keep term and description together in definition lists to avoid breaking across pages. (author: @mcanouil)

• (#13878): Typst now uses Pandoc's skylighting for syntax highlighting by default (consistent with other formats). Use syntax-highlighting: idiomatic to opt-in to Typst's native syntax highlighting instead.

• (#14126): Fix Skylighting code blocks in Typst lacking full-width background, padding, and border radius. A postprocessor patches the Pandoc-generated Skylighting function to add width: 100%, inset: 8pt, and radius: 2pt to the block call, matching the styling of native code blocks. Brand monospace-block.background-color also now correctly applies to Skylighting output. This workaround will be removed once the fix is upstreamed to Skylighting.

• (#14202): Fix CSS inlining (juice) failing on Windows when Quarto is installed in a path with spaces (e.g., C:\Program Files\Quarto\).

pdf

• (#4426): Add pdf-standard option for PDF/A, PDF/UA, and PDF version control. Supports standards like a-2b, ua-1, and versions 1.7, 2.0. Works with both LaTeX and Typst formats.

• (#9091): Fix vertical alignment div has no effect for pdf output

• (#10291): Fix detection of babel hyphenation warnings with straight-quote format instead of backtick-quote format.

• (#13248): Fix image alt text not being passed to LaTeX \includegraphics[alt={...}] for PDF accessibility. Markdown image captions and fig-alt attributes are now preserved for PDF/UA compliance.

• (#13661): Fix LaTeX compilation errors when using mermaid-format: svg with PDF/LaTeX output. SVG diagrams are now written directly without HTML script tags. Note: mermaid-format: png is recommended for best compatibility. SVG format requires rsvg-convert (or Inkscape with use-rsvg-convert: false) in PATH for conversion to PDF, and may experience text clipping in diagrams with multi-line labels.

• (rstudio/tinytex-releases#49): Fix detection of LuaTeX-ja missing file errors by matching both "File" and "file" in error messages.

• (#13667): Fix LaTeX compilation error with Python error output containing caret characters.

• (#13730): Fix TinyTeX detection when ~/.TinyTeX/ directory exists without binaries. Quarto now verifies that the bin directory and tlmgr binary exist before reporting TinyTeX as available, allowing proper fallback to system PATH installations.

• (#13919): Fix margin citations with citeproc showing unresolved ?quarto-cite: placeholders in PDF output. Caused by Pandoc 3.6+ adding \protect before \phantomsection in bibliography anchors.

• (#13249): Update to Pandoc's LaTeX template following Pandoc 3.8.3 support:

  • New RTL support for LuaTeX with \RL, \LR commands and RTL, LTR environments.

  • New shorthands variable for Babel language shortcuts control.

  • New pdf-trailer-id support for reproducible PDF builds.

  • New cancel package support for \cancel command in math.

• (#14017): tColorOptions() in .tex file will now always have options in alphabetical order. Previously, they were in random order leading to a different .tex intermediates for identical .qmd.

• (#14241): Add QUARTO_PDF_STANDARD environment variable as a fallback for the pdf-standard option. Accepts comma-separated values (e.g., QUARTO_PDF_STANDARD=ua-2), enabling PDF standard conformance without modifying document YAML. Works with both LaTeX and Typst formats.

revealjs

• (#13722): Fix light-content / dark-content SCSS rules not included in Reveal.js format. (author: @mcanouil)

• (#13781): Fix axe accessibility checks failing with SCSS compilation error for revealjs format. Axe now loads as a standalone module for all HTML formats with format-specific report placement.

• (#13852): Scroll-view options (scrollSnap, scrollProgress, scrollActivationWidth, scrollLayout) are now rendered in the Pandoc template instead of injected at runtime. Custom revealjs templates may need updating to include the scroll-view configuration block.

• (#14125): Add format-specific axe accessibility report for revealjs when using axe: {output: document}. Report appears as a dedicated slide appended to the deck with hover-to-highlight navigation to offending slides.

dashboard

• (#14125): Add format-specific axe accessibility report for dashboards when using axe: {output: document}. Report appears as a Bootstrap offcanvas sidebar with automatic rescan when switching pages, card tabsets, or toggling the sidebar.

ipynb

• (#13956): Fix crash when rendering to ipynb format with figure labels (#| label: fig-*) on cells for cross references.

Projects

• (#12444): Improve pre/post render script logging with Running script prefix and add QUARTO_PROJECT_SCRIPT_PROGRESS and QUARTO_PROJECT_SCRIPT_QUIET environment variables so scripts can adapt their output.

• (#13892): Fix output-dir: ./ deleting entire project directory. output-dir must be a subdirectory of the project directory and check is now better to avoid deleting the project itself when it revolves to the same path.

website

• (#13524): Add support for Plausible Analytics via plausible-analytics configuration option. Users can either paste their Plausible script snippet directly in YAML or provide a path to a file containing the snippet using plausible-analytics: { path: _plausible_snippet.html }.

• (#13525): Algolia Insights now uses privacy-friendly defaults: useCookie: false with random session tokens when cookie consent is not configured. When cookie-consent: true is enabled, Algolia scripts are deferred and only use cookies after user grants "tracking" consent, ensuring GDPR compliance.

• (#13547)cookie-content: { type: express } is now the default. Previously it was type: implied. It now means this will block cookies until the user expressly agrees to allow them (or continue blocking them if the user doesn't agree).

• (#13570): Replace Twitter with Bluesky in default blog template and documentation examples. New blog projects now include Bluesky social links instead of Twitter.

• (#13716): Fix draft pages showing blank during preview when pre-render scripts are configured.

• (#13847): Open graph title with markdown is now processed correctly. (author: @mcanouil)

• (#13910): Add support for logo: false to disable sidebar and navbar logos when using _brand.yml. Works in website projects (sidebar.logo: false, navbar.logo: false) and book projects (book.sidebar.logo: false, book.navbar.logo: false).

• (#13932): Add llms-txt: true option to generate LLM-friendly content for websites. Creates .llms.md markdown files alongside HTML pages and a root llms.txt index file following the llms.txt specification.

• (#13951): Fix image-lazy-loading not applying loading="lazy" attribute to auto-detected listing images.

• (#9802, #14047): Fix search term highlighting disappearing on page scroll or layout events when navigating from search results. (author: @jtbayly, #13442)

• (#14080): Algolia search results now highlight matching terms on the target page. Search term highlighting also works when matches span across formatted text (e.g., inline code, syntax highlighting).

book

• (#12136): Fix false citeproc: citation not found warnings when book metadata URLs contain @ (e.g., Mastodon links). The @ in URL strings is now escaped before passing to Pandoc, preventing misinterpretation as citation references.

• (#13769): Apply repo-link-target and repo-link-rel options to tools in book sidebar for consistent link attribute handling with website projects. (author: @mcanouil)

manuscript

• (#10031): Fix manuscript rendering prompting for GitHub credentials when origin points to private repository. Auto-detection of manuscript URL now fails gracefully with a warning instead of blocking renders.

Publishing

Posit Connect Cloud

• (#14027): Add quarto publish posit-connect-cloud for publishing static content to Posit Connect Cloud.

Confluence

• (#12558): Fix 500 error when updating multiple Confluence attachments. Attachments are now uploaded sequentially instead of concurrently. (author: @fkgruber)

• (#13414): Be more forgiving when Confluence server returns malformed JSON response. (author: @m1no)

gh-pages

• (#14046): Fix quarto publish gh-pages leaving stale worktrees when git commit fails due to missing user.name/user.email configuration. Git identity is now validated before worktree creation, and worktree cleanup uses --force to handle modified/untracked files.

Lua API

• (#13762): Add quarto.paths.typst() to Quarto's Lua API to resolve Typst binary path in Lua filters and extensions consistently with Quarto itself. (author: @mcanouil)

Commands

use brand

• (#13828): New quarto use brand command copies and synchronizes the _brand/ directory from a repo, directory, or ZIP file. See the prerelease documentation for details.

call build-ts-extension

• (): New quarto call build-ts-extension command builds a TypeScript extension, such as an engine extension, and places the artifacts in the _extensions directory. See the engine extension pre-release documentation for details.

install

• (#4426): New quarto install verapdf command installs veraPDF for PDF/A and PDF/UA validation. When verapdf is available, PDFs created with the pdf-standard option are automatically validated for compliance. Also supports quarto uninstall verapdf, quarto update verapdf, and quarto tools.

• (#11877, #10961, #6821, #13704): New quarto install chrome-headless-shell command downloads Chrome Headless Shell from Google's Chrome for Testing API. This is the recommended headless browser for diagram rendering (Mermaid, Graphviz) to non-HTML formats. Smaller and lighter than full Chrome, with fewer system dependencies.

• (#12124): Support quarto install tinytex on ARM64 Linux and adopt new TinyTeX naming scheme with .tar.xz compression.

preview

• (#13804): Fix intermittent preview crashes during re-renders by properly managing project context lifecycle. Resolves issues with missing temporary directories and quarto_ipynb files when editing notebooks and qmd files together.

Extensions

• Metadata and brand extensions now work without a _quarto.yml project. (Engine extensions do too.) A temporary default project is created in memory.

• New Engine Extensions, to allow other execution engines than knitr, jupyter, julia. Julia is now a bundled extension. See the prerelease notes and engine extension documentation.

Engines

jupyter

• (#13748): Fix stdin encoding to UTF-8 on Windows to correctly handle JSON in documents containing non-ASCII characters.

• (#13936): Add support for q/kdb+ programming language in percent format notebooks and code cell options. (author: @benlubas)

• (#13936): Fix isJupyterPercentScript regex to correctly detect percent scripts with [raw] cells and cells not at the start of the file. The regex now properly groups the alternation (markdown|raw) and uses multiline mode.

knitr

• (#13958): Use max precision for ojs_define number like this is the case for jupyter or julia engine.

Other fixes and improvements

• (#8730): Detect x64 R crashes on Windows ARM and provide helpful error message directing users to install native ARM64 R instead of showing generic "check your R installation" error.

• (#13402): nfpm (https://nfpm.goreleaser.com/) is now used to create the .deb package, and new .rpm package. Both Linux packages are also now built for x86_64 (amd64) and aarch64 (arm64) architectures.

• (#13528): Adds support for table specification using nested lists and the list-table class.

• (#13575): Improve CPU architecture detection/reporting in macOS to allow quarto to run in virtualized environments such as OpenAI's codex.

• (#13656): Fix R code cells with empty lang: "" option producing invalid markdown class attributes.

• (#13776): Do not process tblwidths attributes for non-simple tables, since this breaks rowspan handling.

• (#13832): Fix license.text metadata not being accessible when using an inline license (license: "text"), and populate it with the license name for CC licenses instead of empty string. (author: @mcanouil)

• (#13856): Add code annotation support for Typst and Observable.js code blocks. (author: @mcanouil)

• (#13890): Fix render failure when using embed-resources: true with input path through a symlinked directory. The cleanup now resolves symlinks before comparing paths.

• (#13907): Ignore AI assistant configuration files (CLAUDE.md, AGENTS.md) when scanning for project input files and in extension templates, similar to how README.md is handled.

• (#14198): Ignore .local.md variants of AI assistant configuration files (CLAUDE.local.md, AGENTS.local.md) during project render and quarto use template.

• (#13935): Fix quarto install, quarto update, and quarto uninstall interactive tool selection.

• (#13992): Fix crash when rendering div with both cross-reference ID and conditional visibility to PDF.

• (#13997): Fix Windows dart-sass theme compilation failing when Quarto is installed in a path with spaces (e.g., C:\Program Files\) and the project path also contains spaces.

• (#13998): Fix YAML validation error with CR-only line terminators (old Mac format). Documents using \r line endings no longer fail with "Expected YAML front matter to contain at least 2 lines".

• (#14012): Add fr-CA language translation for Quebec French inclusive writing conventions, using parenthetical forms instead of middle dots for author labels. (author: @tdhock)

• (#14032): Add editor_options with chunk_output_type to YAML schema for autocompletion and validation in RStudio and Positron.

• (#14156): Avoid O(n^2) performance in handling large code blocks.