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2.9.4

Chainlit/chainlit2.9.4Dec 25, 2025by asvishnyakov

AI Summary

Release 2.9.4 is a significant update that adds Modes functionality, includes security vulnerability fixes, and requires a database migration for persistence users.

Key Highlights

  • Breaking change: Database migration required (ALTER TABLE steps ADD COLUMN IF NOT EXISTS modes JSONB)
  • Security vulnerability fix
  • Add Modes feature
  • New option to disable auto-scroll of assistant messages
  • Security fix: sanitization for custom thread element update

Breaking Changes

  • Database migration required for persistence users: ALTER TABLE steps ADD COLUMN IF NOT EXISTS modes JSONB

New Features

  • Add Modes
  • New option to disable auto-scroll of assistant messages
  • Icon for shared threads

Full Release Notes

## What's Changed

⚠️ This release contains:
* **Breaking change**, if you use persistence: you need to run `ALTER TABLE steps ADD COLUMN IF NOT EXISTS modes JSONB;` to migrate
* **Security vulnerability fix**

### Added
* Added an icon for shared threads by @Allaoua9 in https://github.com/Chainlit/chainlit/pull/2715
* New option to allow disabling auto-scroll of assistant messages by @jfperusse in https://github.com/Chainlit/chainlit/pull/2724
* feat: Add Modes by @hayescode in https://github.com/Chainlit/chainlit/pull/2734

### Fixed
* fix: tiny error avatar for long messages by @jfperusse in https://github.com/Chainlit/chainlit/pull/2725
* security: add sanitization for custom thread element update by @asvishnyakov in https://github.com/Chainlit/chainlit/pull/2737

### Other
* chore: bump watchfiles by @hayescode in https://github.com/Chainlit/chainlit/pull/2733
* chore: update uv.lock after watchfiles changes by @asvishnyakov in https://github.com/Chainlit/chainlit/pull/2735
* chore: release by @asvishnyakov in https://github.com/Chainlit/chainlit/pull/2738


**Full Changelog**: https://github.com/Chainlit/chainlit/compare/2.9.3...2.9.4