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MCP Extensions, xAI's TypeScript SDK, ChatGPT sign-in - Week of September 28, 2026

OpenAI layers ChatGPT plugins on MCP and lets apps sign in with ChatGPT, xAI ships a TypeScript SDK, DeepMind watermarks designed proteins, and Google builds an agent workflow engine with hard stops.

Chapters

  1. Cold open

  2. openai/mcp-extensions

    https://github.com/openai/mcp-extensions

  3. xai-org/xai-sdk-ts

    https://github.com/xai-org/xai-sdk-ts

  4. openai/sign-in-with-chatgpt-devkit

    https://github.com/openai/sign-in-with-chatgpt-devkit

  5. google-deepmind/synthidbio

    https://github.com/google-deepmind/synthidbio

  6. google/lightflow

    https://github.com/google/lightflow

  7. openai/openai-live-console

    https://github.com/openai/openai-live-console

  8. Trend watch

  9. Sign-off

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