Not that we needed all that for the trip, but once you get locked into a serious drug collection, the tendency is to push it as far as you can.

Hunter S. Thompson

Reverse-engineering is kinda fun. More fun when we can shave the yak by adding more tools to our LLM/MCP toolbox, amirite?

So I accidentally came across this LinkedIn post, about an SVG diagramming tool for Claude. I was just working on some diagrams as part of reverse engineering and having been making agents create those with Mermaid, but I thought I’d give it a try.

Well, that was a flock of wild geese chasing a red herring down a rabbit hole to borrow a shear…

First, I thought the idea was clever, but I wanted more cowbell (because we don’t have enough animals in this post), so I forked that and vibe-coded an MCP server on top of that.

Then I tried to use it to create a few architecture diagrams but I found it actually somewhat lacking. When the client (Claude Desktop) was using it, I didn’t love the editing capability. When the client was not using it, it created nicer-looking diagrams somehow (in SVG, yes) and with legends and stuff. But of course the graph layout still sucked. So I’d need to manually edit it.

Well, screw that, said I. I’ll use AWS MCP server, said I.

Screw that, said I next.

Then I modified the prompt to ask not for SVG but for DOT format of GraphViz. Much better, I said. And then, uh… It could have gone better, right? But at this point I’m not sure how to improve the prompt.

But I know what to do when I don’t know something, right?

Yes. I put the DOT file to the LLM and ask it to tweak it to have a certain thing. Then I ask why. Then I, of course, ask it, to fix this original prompt. And it’s turtles (yes, we’re in a zoo and you’re reading it on a Safari) all the way down.

And what do we learn, Palmer? Well, never mind, let us draw the curtain of charity over the rest of this scene.

(Well, not quite true — using DOT is the better thing to do here than explicitly doing things like “30px” instructions).

NOTE: multiple individuals of bos grunniens species have undergone keratinous biomass reduction, which also included:

• Env var syncer for apps not launched for terminal, which in turn is also useful for
• MCP config and prompt syncer

The moral of the story is absent.