What's New in RStudio

## New Features

- Bring your own provider for Posit Assistant: Posit Assistant can now be configured to directly use providers other than Posit AI (Anthropic, OpenAI, Amazon Bedrock, and others).
- Typst output for Quarto documents: The Quarto Document dialog now offers separate PDF (Typst) and PDF (LaTeX) output options. Typst is bundled with Quarto and requires no additional software.
- Date and time formatting: Dates and times (such as the Files pane Modified column) are now formatted according to the system region by default, rather than always using a US-style format. A new settings menu on the Files pane toolbar adds options to use ISO-8601 formatting or the UTC time zone instead.
- Find in Files improvement: The Find in Files replace preview and Replace All results no longer present matches whose proposed replacement is identical to the matched text; lines whose every match would be unchanged are omitted entirely.
- rserver --check-config: Use `rserver --check-config` (and the `rstudio-server check-config` admin subcommand) to validate the configuration file without starting the service, reporting all unrecognized options in a single pass. `--test-config` is now a deprecated alias for `--check-config` with the same behavior; it previously stopped at the first unrecognized option. Using `--test-config` prints a deprecation warning, and it will be removed in a future release. `--check-config` now also validates that configured file paths (secure-cookie-key-file, rsession-config-file, database-config-file) exist on disk, and reports the detected R installation (informational). In Posit Workbench builds, the check also covers database connectivity and license status.
- Improved performance for projects on network or remote filesystems: RStudio can now reduce background file operations (recursive file monitoring, code indexing, and external-edit checks) for projects located on network or remote filesystems, improving responsiveness on slow drives. This applies automatically when a remote filesystem is detected, and can be configured globally (Tools > Global Options > General > Advanced) or overridden per-project (Project Options > General).

## Fixes

For a full list of bug fixes in this release, see the release notes.