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# v0.5.15 — Bridge relay and theme reliability

Released April 5, 2026

## Highlights

* Bridge relay now handles every tool call through one path — fewer mystery timeouts
* Theme and dark mode stay in sync in the chat rail
* macOS 0.5.13 and Windows 0.5.15 desktop builds with bridge and launch fixes

## Changes

Improved
* Non-React bridge relay with prewarm tuning and version tracking
* Theme requests on chrome.webview with retry when the host wakes late
* Eliminated redundant bridge calls and tightened message memoization in chat

Fixed
* PostWebMessageAsJson channel mismatch on Windows
* Windows 0.5.12 launch crash on Windows N/KN editions
* Windows 0.5.13 disables intro video path that conflicted with some NVIDIA drivers
* Prompt context failure cache uses a stable key across working-set revisions

Source: https://www.summerengine.com/changelog/0.5.15

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## Machine-readable resources

- Site index for agents: https://www.summerengine.com/llms.txt
- Full inlined content: https://www.summerengine.com/llms-full.txt
- Porting catalog: https://www.summerengine.com/llms-porting.txt
- Structured catalog: https://www.summerengine.com/agent-catalog.json
- Sitemap: https://www.summerengine.com/sitemap.xml
- Developer resources: https://www.summerengine.com/docs