v0.4.13 v1.5.3

Name: svelte
Author: sveltejs

high risk

sveltejs/svelteAug 9, 2026 → Aug 10, 20261 day between releases

What's New

Major version bump introduces LLM and browser fixes, replacing feed spider features

Breaking Changes

Major version jump from 0.4.13 to 1.5.3 implies potential breaking changes.
Feature scope has shifted significantly from feed spiders to LLM/browser tooling.

New Features

OpenRouter app attribution added to requests.

Improvements

Browser container environment made more robust by preserving environment variables.
LLM tool calling logic refined to handle tool-less requests efficiently.

Bug Fixes

Fixed browser session management by reclaiming abandoned sessions.
Fixed LLM parallel tool calls on tool-less requests.
Fixed container browser environment to keep env alive where image ENV is dropped.

Upgrade Notes

Upgrading from v0.4.13 to v1.5.3 is a major version jump requiring careful review. The project focus has shifted from feed spiders to LLM/browser tooling; verify compatibility with your workflow.

The Two Releases

v0.4.13

Release v0.4.13

Aug 9, 2026· 2 months ago

This update introduces feed spider templates, upgrades the MCP server to SDK v2, and adds a direct CLI command for the MCP server.

Full release notes

v1.5.3

Aug 10, 2026· 2 months ago

This release addresses stability issues in LLM interactions and browser session management.

Full release notes