I am experimenting a bit more with coding agents lately, especially Claude Code. To circumvent the TTFX issues, I am trying to teach Claude to use Julia how I use it: through the REPL. For that, I’ve created a small package, MCPRepl.jl , whose purpose is to expose your REPL via the MCP protocol, i.e.…

At its core this MCP just allows Claude to execute code in your repl. It sends a command and it gets the text/plain representation same as you do when you work with the repl. Okay this answers part of my question. It doesn’t know the contents of df_total but it does know whatever it can learn fro…

I think overall the statefull appraoch of Julia might not fit the LLMs so well. It has lots of problems with environments and environment management especially. I guess you’re at least partly referring to the issues discussed in that thread: Interactive prototyping workflows - #36 by kousu Ther…

Well, it knows nothing about that object, not even that it exists. But if you tell it it exsist, it can learn every last detail, including all the data by querying it in the repl. Regarding cursor auto-complete: I don’t think it will work out of the box. I think in order to allow for this, one nee…

[image] hexaeder: Well, it knows nothing about that object, not even that it exists. But if you tell it it exsist, it can learn every last detail, including all the data by querying it in the repl. Regarding cursor auto-complete: I don’t think it will work out of the box. I’m not sure I unde…

The relationship is single sided: the agent can send querys to the repl. The mcp never pings the agent. The agent essentially just sends a string to be evaluated and gets a string back. In pseudo code this looks like this: julia-repl-exec: "a = [1,2,3]" The mcp server, executs that on the julia si…

Ah okay. I believe there is another Julia package which has the behavior I describe (essentially, the LLM intercepts every REPL input and every REPL output), but doesn’t have the feature of your package in that you can’t tell an agent existing elsewhere (Cursor, for example), to do things to the Jul…

[image] pdeffebach: I believe there is another Julia package which has the behavior I describe (essentially, the LLM intercepts every REPL input and every REPL output) What is the name of the other package if I may ask?

Did you see the security changes in my fork? Yes I agree one can always add or dev a package from git. But there’s something about it being in the general registry which gives it some additional status and visibility.

I have integrated the Julia language server so it can do that stuff now. These are the tools provided: lsp_goto_definition Jump to the definition of a symbol using Julia LSP. Uses the Julia Language Server to find where a function, type, or variable is defined in the code… lsp_code_actions Get a…

Hey @kahliburke , I had a look at your fork again, it indeed looks very impressive with lots of improvements and added functionality! I didn’t have the time yet to play around with it, but since it is far more active than my repo, I also put a link to it in the readme. Did you see the security ch…

[ANN] MCPRepl.jl -- share your REPL with your AI Agent

Package Announcements

kahliburke February 27, 2026, 9:09am 33

As promised!!!

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[ANN] julia-mcp — persistent Julia sessions for AI assistants Package Announcements ai	27	1624	February 22, 2026
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[ANN] MCPRepl.jl -- share your REPL with your AI Agent

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