Image: u/ecfy on Reddit · Plane Foundry’s overview of world, story, fights and recaps
A D&D campaign tool built over a year with Claude Code
A player built a tool so their dungeon master could run maps, combat turns and NPCs in one place, reviving a pre-AI idea with Claude Code and opening it up after about a year.
Credits
Earliest dated source:
The full story
Plane Foundry is an all-in-one tool for Dungeons & Dragons dungeon masters: a campaign wiki, battle maps with fog of war, initiative and stat blocks, and session recaps. The maker, a player for about four years, started it after watching their DM juggle half a dozen tools, reviving an unfinished pre-AI attempt at shared session notes.
After about a year with Claude Code, which wrote most of the code, the feature the maker cares about most is session recording: a Discord bot or a phone on the table records the game, then Claude writes up what happened and suggests updates to NPCs and quests. The maker says about four sessions in five need no fixing, depending on microphone placement.
An MCP lets Claude build a campaign directly; the maker fed it a module's PDF to create its monsters, NPCs and storylines. Having Claude screenshot or record every change helped more than reading diffs.
How it was done
Tools
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: Been building a D&D campaign tool with Claude Code for about a year, finally opened it upReddit poster: ecfyPosted
The maker's post in r/ClaudeAI on the tool and how it was built.
- The project: planefoundry.com
The tool's website, with its features; the first campaign is free.