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2.9.1

Chainlit/chainlit2.9.1Nov 20, 2025by hayescode

AI Summary

This release focuses on UI enhancements including markdown support in watermarks and tabs in chat settings, alongside a comprehensive increase in test coverage.

Key Highlights

  • Support for tabs in chat settings
  • Markdown support in watermarks
  • Query param prefill for chat
  • Massive increase in test coverage for core components

New Features

  • Support for tabs in chat settings
  • Markdown support in watermarks
  • Query param prefill for chat

Full Release Notes

## What's Changed
* Add query param prefill for chat by @ADWasHere in https://github.com/Chainlit/chainlit/pull/2624
* Added italian translation to translations folder by @SpaceAndrea in https://github.com/Chainlit/chainlit/pull/2646
* Support markdown in watermark by @eiseleMichael in https://github.com/Chainlit/chainlit/pull/2653
* Added support for tabs in chat settings by @Allaoua9 in https://github.com/Chainlit/chainlit/pull/2651
* add test for action by @codomposer in https://github.com/Chainlit/chainlit/pull/2643
* add test for step class by @codomposer in https://github.com/Chainlit/chainlit/pull/2660
* Add test for element class by @codomposer in https://github.com/Chainlit/chainlit/pull/2666
* feat: complete langchain test script by @codomposer in https://github.com/Chainlit/chainlit/pull/2665
* add test for input widget by @codomposer in https://github.com/Chainlit/chainlit/pull/2667
* add test for mcp by @codomposer in https://github.com/Chainlit/chainlit/pull/2668
* add test for chat settings by @codomposer in https://github.com/Chainlit/chainlit/pull/2669
* add test for sidebar by @codomposer in https://github.com/Chainlit/chainlit/pull/2670
* add test for markdown by @codomposer in https://github.com/Chainlit/chainlit/pull/2671
* add test for utils by @codomposer in https://github.com/Chainlit/chainlit/pull/2672
* add test for session by @codomposer in https://github.com/Chainlit/chainlit/pull/2673
* chore/release by @hayescode in https://github.com/Chainlit/chainlit/pull/2676
* add test for socket by @codomposer in https://github.com/Chainlit/chainlit/pull/2674
* add test for chat context by @codomposer in https://github.com/Chainlit/chainlit/pull/2677

## New Contributors
* @SpaceAndrea made their first contribution in https://github.com/Chainlit/chainlit/pull/2646
* @eiseleMichael made their first contribution in https://github.com/Chainlit/chainlit/pull/2653
* @codomposer made their first contribution in https://github.com/Chainlit/chainlit/pull/2643

**Full Changelog**: https://github.com/Chainlit/chainlit/compare/2.9.0...2.9.1