I made an MCP server that basically implements all the tools an agent harness would provide. The code is checked out on my server, the MCP server creates git worktrees on "activation" and it can read, modify files, run bash commands etc. I have this setup in typingmind so I can do everything from my phone :p The only problem is that typingmind needs to be in the foreground on my phone, otherwise it will kill the connection.

There was a time where I was often stuck for an hour with nothing but my phone and I kept copying file contents into chat for context so I made this and it works surprisingly well.