shadcn@4.21.1 v2026.10.04
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QwenAudio/SenseVoiceOct 1, 2026 → Oct 4, 20263 days between releases
What's New
Upgraded to JSON 3.0.2 and MySQL 8.4 LTS with stricter parsing rules.
Breaking Changes
- JSON 3.0.2 rejects duplicate object keys and JavaScript-style comments by default
- MySQL upgrade requires backing up data and an intermediate upgrade for versions older than 8.0
New Features
- Improved agent scheduling by deduplicating automatic checks
Improvements
- Upgraded bundled database and Docker Compose MySQL services to 8.4 LTS
- Upgraded to json 3.0.2
- Moved navigation labels to translation keys while preserving the English text
Upgrade Notes
Check external JSON inputs for duplicate keys and comments, and review custom Agent gems for json 3 API compatibility. Back up MySQL databases before upgrading. MySQL 5.7 requires an intermediate upgrade to 8.0 before 8.4.
The Two Releases
shadcn@4.21.1
shadcn@4.21.1
Oct 1, 2026· 21 days ago
Introduced the `@shadcn/registry` engine and fixed reduced motion handling for shimmer effects.
Full release notesv2026.10.04
v2026.10.04
Oct 4, 2026· 18 days ago
A major update introducing stricter JSON parsing, upgrading the bundled database to MySQL 8.4 LTS, and improving agent scheduling.
Full release notes