March 2026 monthly summary for modelcontextprotocol/rust-sdk: Key efforts focused on maintainability and forward-compatibility through RMCP macros alignment with rmcp 0.13.0. Core work involved updating deprecated type aliases to canonical *Params names and updating documentation to reflect changes, resulting in a clean build and reduced deprecation noise across downstream crates.

Month: 2025-11 — Apache Arrow Rust Object Store (apache/arrow-rs-object-store). Delivered a credential handling enhancement for Google Cloud Storage (GCS) that makes ADC (Application Default Credentials) reading conditional on the presence of explicit credentials, preventing ADC-related build failures when explicit credentials are provided while still surfacing ADC errors when they are not. Updated credential precedence to explicit credentials > ADC > instance metadata and added tests to validate behavior across scenarios (explicit service account path, service account key, and custom credentials provider). The fix is documented in commit 521f1dc736b6956e11140a9ad66e2b63b80b0e5e, under the message: fix(gcp): ignore ADC errors when explicit credentials are provided.