Show HN: An open-source AI Gateway with integrated guardrails

Hi HN, I've been developing Portkey Gateway, an open-source AI gateway that's now processing billions of tokens daily across 200+ LLMs. Today, we're launching a significant update: integrated Guardrails at the gateway level. Key technical features: 1. Guardrails as middleware: We've implemented a hooks architecture that allows guardrails to act as middleware in the request/response flow. This enables real-time LLM output evaluation and transformation. 2. Flexible orchestration: The gateway can now route requests based on guardrail verdicts. This allows for complex logic like fallbacks to different models or prompts based on output quality. 3. Plugin system: We've designed a modular plugin system that allows integration of various guardrail implementations (e.g., anthropic/constrained-llm, microsoft/guidance). 4. Stateless design: The guardrails implementation maintains the gateway's stateless nature, ensuring scalability and allowing for eas