A discussion forum with a daily digest, built by Claude Code on Elements
Topics with photos, quoted replies, likes, marked solutions, live topic lists, a daily digest and moderator tools.
How it's built
Threadmoor needed topic lists that update as people post, replies that land on every open copy of a thread, image uploads, a daily email digest and moderator controls. Each of those is a part of Elements, so the agent spent its 30 minutes on the forum itself.
- Live topic lists. Topics are a LiveTable opened on the front page, per category, on the unanswered tab and on the pinned strip, 25 at a time. A database trigger announces each new topic and fresh reply, so every open list moves as the forum does.
- Live threads. Posts and likes are LiveTables. A reply, with its quote, appears on every open copy of the topic, and marking a solution or hiding a post updates every screen, the previous solution included.
- Moderation as function calls. Moderators pin, lock and move topics with
@rpcfunctions, each checked against the signed-in user's role. - Image uploads. The editor uploads photos through an rpc that returns the markdown to embed them, and a route serves each image under its content hash.
- A daily digest. One cron line runs a job each morning that queues an email for every member with new replies in the topics they follow, one job per member so each retries on its own.
- Data from SQL files. Three migrations define the forum, add four categories with solutions turned on for Help, and seed nine members, thirty topics, replies, likes, avatars and woodworking photos.
Why Elements
Elements is an integrated full-stack app framework and a project server. The project server checks the agent's work as it builds: it type-checks the server and browser code, analyzes the program, applies migrations and runs the tests, then reports the results to the agent. A security mistake, such as calling a server-only function from the browser, is a compile error. The agent reads the report and fixes its own mistakes before it tells you a feature is done. The same checks run on every feature you ask for next.
Run it yourself
- 1 Sign up
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- 2 Install and run the demo One prompt to paste into your agent.
The prompt
What Claude was given to build this app.
Build a discussion forum named threadmoor for a woodworking community. - Sign up, log in, profile with avatar and bio. - Categories (projects, tools, finishing, help), each with topics. - Start a topic with markdown and images; reply; quote a reply. - Like posts. Mark a reply as the solution in the help category. - Topic lists: latest, top this month, unanswered. - Follow topics; a daily email digest of new replies in followed topics. - Moderators pin, lock and move topics, and hide posts. Seed a moderator, eight members, four categories and about thirty topics with replies and images. Show the seeded logins on the sign-in page. New topics and replies appear in real time, with infinite scroll on long topics.