How to handle mcp-hub current directory shared between different Neovim instances?

[powerman]

The use case is: run 2 Neovim in two different project root directories, then ask LLM to run make test in both Neovim.

Right now both Neovim instances will share same mcp-hub process, and both will run make test in first project's directory.
Even if tool used to run a shell command provides an argument to define a working directory for a command LLM might not provide it (even if specifically instructed to do this in a system prompt). And some other tools like file editing or git repo etc. may run using relative file names etc. and also work on wrong project.

At a glance there should be a way to either avoid sharing mcp-hub processes for Neovim running in different directories or send Neovim's current working directory to mcp-hub with each request and ensure mcp-hub uses given directory as a current directory for all MCP servers. The last case looks more complicated and anyway will result in running multiple copies of local MCP servers (one per each unique Neovim working directory) to ensure these servers won't act on wrong directory (just in case they do anything with local files).

So, how to handle this?

• Write specific instructions like "ALWAYS send current directory in param X for MCP Y. ALWAYS send absolute file paths for MCP Z." for all MCP servers which works with local files (and probably set this as a "Custom Instructions" in MCPHub)?
• Randomize port = 37373 value in mcphub.nvim configuration to force it avoid reusing mcp-hub process (didn't tried this yet so it might not work as I expect)?
• Anything else?

[powerman]

Here is a quick workaround. Still possible to get a conflict between directories, but now with 1/1000 probability instead of 1/1 guarantee. 😄

    {
        'ravitemer/mcphub.nvim',
        -- ...
        config = function()
            -- Try to avoid sharing mcp-hub instance between directories.
            local cwd_hash = string.sub(vim.fn.sha256(vim.fn.getcwd()), 1, 4)
            require('mcphub').setup {
                port = 13000 + tonumber(cwd_hash, 16) % 1000, -- Use ports 13000-13999.
                -- ...
            }
        end,
    }

[ravitemer]

Working on this!

[ravitemer]

@powerman This should be fixed in v6.0.0. Please refer to #206 announcement and https://ravitemer.github.io/mcphub.nvim/workspace.html page

Thanks for the suggestions!

[powerman]

I've just tried to use new workspace feature in v6.2.0, but there is an issue - maybe I'm doing something wrong or maybe some feature is missing.

To me it looks a bit weird to require .mcphub/servers.json in each project. So far all my projects works fine with a global MCP config. But these projects are in different dirs/git repos and should run own instances of global MCP servers on project-specific port. How to make it work this way without creating .mcphub/servers.json in each project? I've tried to add ".git" into look_for but this fails - I suppose each item in look_for is expected to be a JSON config and not a directory like ".git".

Ability to have custom config per-workspace is a great feature but workspaces (i.e. projects/git repos) should be isolated even without custom config.