Developed and delivered an Auto-Install Fallback for PATH Shims in the jdx/mise repository, focusing on improving the reliability of tool installation workflows. This feature introduced a mechanism that adds the shims directory as a PATH fallback when auto-install is enabled, allowing tools that are not yet installed to trigger their own installation and ensuring the correct version is provided on demand. Addressing subshell PATH inconsistencies, the solution reduced manual intervention and streamlined both developer onboarding and CI processes. The work leveraged Bash scripting, CLI development, and Rust programming, and was co-authored in collaboration with another contributor to align install behavior.