Rails Agent is a single, beautiful full-stack agentic platform for Ruby on Rails. Build chatbots, knowledge (RAG-style) agents, workflow agents, operations jobs, monitoring agents, and every agentic workflow you can think of — as files in app/agents/, with a mounted /agents dashboard and hosted cloud runtime. Build: instructions (prompt.md), tools (function calling over ActiveRecord), connectors (OAuth SaaS), channels (Slack, Teams via Open-Wire, web, cron, HTTP API), skills, packages (Skills.sh / APM / Smithery), knowledge, memory (Mem0), guardrails, playbooks, and a shared agents library. Test: cloud sandbox runs, streaming, evals (golden cases), traces, and cost before you ship. Deploy: rails-agents sync → deploy to the production harness, BYOK credentials, and channel go-live — without provisioning agent infra yourself. Monitor: runs, traces, evals, budgets, and usage in /agents. BYOK providers: OpenAI, Anthropic, Google Gemini, OpenRouter, xAI, Groq, Mistral AI, DeepSeek, Together AI, Fireworks AI, Perplexity, Cerebras, Hugging Face, and custom OpenAI-compatible providers. Reference keys as credential: :company_openai in Ruby — secrets never live in Git. Rails 6.1+, Ruby 3.2+. Alternative to RubyLLM and ActiveAgent when you need the whole agent lifecycle, not just an LLM client.