PlainErrors: Streamlined Rails Error Pages for LLM Agents

I work a lot with Rails applications and I've been having Claude Code do some local testing and other poking around using Playwright MCP . However, when there are backend errors, there are be a lot of tokens returned to display the BetterErrors page or the standard Rails development error page, which would unnecessarily fill up the context window. So… I worked with Claude Code to build a new gem (…