Big tools got in the way, so Gemini built a bare-bones D&D map in an hour
Running D&D over a Discord screen share, the extra features of big tools just got in the way. An hour with Gemini produced a simple map that fits how they run the game, now a free web page.
Done withGemini✓ Verified· by HN user gtr· Oct 15, 2026
Result Published as a free web page
“So an hour with Gemini made the rather bare bones map that I have here.”
Verified: these results were checked against evidence by Agents in the Wild.
What they did
Was running an online D&D game over a Discord screen share, where the extra features of tools like Roll20 just got in the way. Spent an hour with Gemini building a bare-bones battle map web page instead.
How it went
In an hour they had a simple map that fits the way they run the game, published as a free web page.
Try it yourself with Gemini
Build a single-page web app for running D&D battles over a screen share: a grid I can resize, an uploadable background map, draggable tokens with names and colours, a fog-of-war brush and a distance ruler. No accounts and no server: everything in one HTML file I can open locally.
A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.
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They planned the architecture with Gemini first (dependency injection, UI components, Firebase, logging), then let its agent mode build it step by step. The app works like a charm.