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OSS ReleasesJun 23, 2026·2 min read·By StartupCorners

OSS Releases Week of June 23 2026: Astro, LangChain, and More

This week's OSS releases center on Astro's sweeping Vite v8 upgrade across all major integrations, a Postgres 17 default for self-hosted Supabase, and tighter tool-calling support across the LangChain and Anthropic SDK ecosystems.

Frameworks

  • withastro/astro (@astrojs/react@6.0.0, @astrojs/vue@7.0.0, @astrojs/svelte@9.0.0, @astrojs/solid-js@7.0.0, @astrojs/preact@6.0.0, @astrojs/mdx@7.0.0) - ⚠ Breaking: All six renderer integrations upgrade to Vite v8; getContainerRenderer() moves to a dedicated container-renderer sub-entrypoint (importing from the package root is deprecated and now logs a warning). @astrojs/mdx also adds programmatic frontmatter mutation via Satteri plugins.
  • withastro/astro @astrojs/netlify@8.0.0 - ⚠ Breaking: Vite v8 upgrade; adds a cacheNetlify() CDN cache provider with tag-based and path-based invalidation backed by Netlify's durable edge cache.
  • withastro/astro @astrojs/vercel@11.0.0 - ⚠ Breaking: Vite v8 upgrade; adds a cacheVercel() CDN cache provider that sets Vercel-CDN-Cache-Control and Vercel-Cache-Tag headers with tag and path invalidation support.
  • withastro/astro create-astro@5.1.0 - New projects now scaffold an AGENTS.md file with dev-server instructions plus a CLAUDE.md symlink pointing to it.

AI

  • langchain-ai/langchain langchain-openai==1.3.3 - Enables strict=True on tools for OpenAI-compatible models in ProviderStrategy and strips stop from the Responses API payload.
  • langchain-ai/langchain langchain==1.3.11 - strict=True on tools lands in ProviderStrategy for OpenAI-compatible models.
  • langchain-ai/langchain langchain-openrouter==0.2.4 - Adds cache_control passthrough on tool definitions and parallel_tool_calls support on bind_tools.
  • anthropics/anthropic-sdk-typescript sdk-v0.105.0 - Adds support for the new code_execution_20260120 tool and introduces lazy partial-JSON parsing for tool input streams.
  • anthropics/anthropic-sdk-typescript bedrock-sdk-v0.31.0, vertex-sdk-v0.18.0, aws-sdk-v0.5.0, foundry-sdk-v0.4.0 - Lazy partial-tool-JSON streaming lands across all cloud-provider SDK variants.
  • BerriAI/litellm v1.89.3 - Stable patch backporting several upstream fixes; all Docker images are cosign-signed.
  • openai/openai-python v2.43.0 - Updates the OpenAPI spec and Stainless config.

Data

Runtime

  • cloudflare/workerd v1.20260623.1 - Fixes two bugs affecting persistent stubs; daily cadence releases v1.20260618.1 through v1.20260622.1 incorporate upstream V8 and runtime changes.

DevTools

  • microsoft/vscode 1.125.0 - June 2026 stable release; see the full changelog for details.
  • neovim/neovim v0.13.0-dev-797 - Nightly prerelease continuing the 0.13 development cycle with incremental fixes and features.

The week's releases signal two converging pressures on the OSS ecosystem: a broad push for faster, more capable build tooling (Vite v8 propagating across the entire Astro integration surface) and tightening reliability expectations around AI tool-calling, with LangChain, the Anthropic SDK, and LiteLLM all shipping coordinated improvements to structured-output and streaming behavior across every major model provider.

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