Released on August 2, 2026, mcp-acronym-lookup v0.4.0 is a maintenance and alignment release designed to solidify the project’s foundation. The primary focus of this update is to transition the server’s internal implementation to the official Model Context Protocol (MCP) Go SDK, ensuring the project remains compatible with the evolving industry standard for AI agent tool integration.

What’s new

The core of this release is a strategic migration from a community-led library to the official modelcontextprotocol/go-sdk. While the server’s outward behavior remains unchanged, this internal shift brings several key improvements:

  • Official SDK Integration: By adopting the official Go SDK, mcp-acronym-lookup is now fully aligned with the MCP specification, providing a more stable and future-proof implementation.
  • Enhanced Tool Precision: The lookupAcronym tool has been upgraded to use structured input and output types. Instead of generic maps, the server now provides a precise JSON schema to AI agents, explicitly defining the acronym parameter and the resulting output structure.
  • Modernized Core: The project now supports Go v1.26.5, bringing in the latest language enhancements and security patches.
  • Infrastructure Updates: We’ve updated our CI/CD pipeline, including GitHub Actions and CodeQL, to ensure a secure and efficient build process.

Why it matters

For most users, v0.4.0 will feel like a seamless update, but the underlying changes provide significant value for the AI agents utilizing the server.

The move to structured types means that AI models now receive a clearer “contract” when calling the lookupAcronym tool. By providing a more rigorous JSON schema, we reduce the likelihood of malformed requests and improve the reliability of acronym resolution across different LLMs. Furthermore, aligning with the official SDK ensures that as the MCP ecosystem grows and introduces new capabilities, mcp-acronym-lookup will be positioned to adopt them quickly and reliably.

Upgrade and Installation

Updating to v0.4.0 is straightforward, as there are no breaking changes to the configuration or the tool’s behavior. The ACRONYM_FILE environment variable remains the only requirement for setup.

For users installing from source: Run the following command to get the latest version:

go install github.com/UnitVectorY-Labs/mcp-acronym-lookup@latest

For binary users: Download the pre-compiled executable for your platform (macOS, Linux, or Windows) from the GitHub Releases page.

This post was AI-generated. The model used was unsloth/gemma-4-31B-it-GGUF:UD-Q5_K_XL. Reference repository: UnitVectorY-Labs/mcp-acronym-lookup, release v0.4.0, generated on August 2, 2026. Author: release-storyteller