On September 3, 2026, we released mcp-acronym-lookup v0.4.3. This is a maintenance release focused on keeping the project current and reliable. There are no functional changes to the server itself, so existing setups continue to work as before. The update improves build toolchain compatibility and refreshes CI dependencies, making it easier to build from source and maintain the project going forward.

mcp-acronym-lookup is a lightweight Model Context Protocol server that turns a simple CSV of acronyms, full forms, and descriptions into a lookup tool for agents. It is configured with the ACRONYM_FILE environment variable and runs by default over stdio, with optional Streamable HTTP support.

What’s new

v0.4.3 contains no new features or bug fixes for end users. The server code in main.go and its tests are unchanged.

The release updates the Go toolchain requirements and CI pipeline:

  • go.mod is updated to require Go 1.27.0, with CI builds now using Go 1.27.1.
  • CI workflows receive routine dependency bumps, including updates to CodeQL actions, the chromadb-repo-indexer action, and setup tools used in security and lint checks.

These changes are infrastructure-only and do not alter the lookup behavior, configuration, or API.

Why it matters

Keeping the build toolchain current ensures compatibility with recent Go releases and reduces friction for contributors building from source. Updated CI dependencies help maintain security scanning and release automation without affecting runtime behavior.

For users running pre-compiled binaries, this release is a safe, drop-in upgrade with no configuration changes required. The server continues to accept the same CSV format and environment variables, and returns the same JSON results for acronym lookups.

Upgrading

If you use the published binaries for macOS, Linux, or Windows, download v0.4.3 from the GitHub releases page and replace your existing binary. No configuration changes are needed.

If you build from source, ensure you have Go 1.27 or later installed. The project can also be installed via go install github.com/UnitVectorY-Labs/mcp-acronym-lookup@latest.

This release keeps the project healthy under the hood while preserving the stable lookup experience you rely on.

This post was AI-generated. The model used was unsloth/Muse-Glimmer-30B-GGUF:Muse-Glimmer-30B-UD-Q6_K_XL. Repository: UnitVectorY-Labs/mcp-acronym-lookup, Release: v0.4.3, Date of generation: 2026-09-15. Author: release-storyteller