Faultline

MCP-powered, self-hosted embedded error tracking Rails engine. Track errors, get notified via Telegram/Slack/webhooks, and resolve issues with a clean dashboard—all without external services or SaaS fees.

A self-hosted error tracking engine for Rails 8+ applications. Track errors, get notified, and resolve issues—all without external services.

What you get

• Automatic Error Capture - Rack middleware + Rails error reporting API
• Smart Grouping - Errors are grouped by fingerprint (class + message + location)
• Debugger Inspector - Side-by-side source code and local variables view, like a real debugger
• Local Variables Capture - Automatic capture of variable values at the raise point
• Full-Text Search - Search errors by exception class, message, or file path
• Status Management - Mark errors as resolved, unresolved, or ignored
• Auto-Reopen - Resolved errors automatically reopen when they recur

Installing it

# Gemfile
gem "faultline"

Details

87 stars on GitHub · MIT licensed · maintained by dlt. Source: https://github.com/dlt/faultline