Dear Galaxy-dev team, As a research scientist in the dept. of Plant Sciences I would like to contribute a tool to the 'Metabolomics' tool-box under Galaxy. The tool is principally written in R, with some dependencies (namely: R>=3.x, and several R packages). Following the documentation in: https://wiki.galaxyproject.org/Admin/Tools/ToolDependencies https://wiki.galaxyproject.org/Admin/Config/ToolDependencies I admit I get confused by the numerous possibilities offered by the framework. My main concern is to be able to link the Galaxy server to tools already installed on my development environment, and NOT to depend on the tools available in the tool-shed repository (as many are not there, and there are specific versions requirements). Could you kindly direct me to the relevant solution, or a user's-list post, if applicable? Many thanks in advance, Nir Shachaf, Plant Sciences Dept., Weizmann Inst. of Science, Rehovot, Israel.