LiteHarness – Unified AI Agent SDK

A lightweight abstraction layer that lets developers swap between Claude, OpenAI, and Pi AI agents with a single query() function. Reduces vendor lock-in and simplifies agent integration for developers building AI-powered tools.

The multi-model AI market is genuinely fragmented right now, and developer fatigue from rewriting integrations every time a new frontier model drops is a real, documented pain point — so the timing logic holds. The closest incumbent is LangChain, which already offers provider-agnostic abstractions alongside a much broader agent framework, and that's the core problem: LangChain, LlamaIndex, and even lighter options like LiteLLM have largely solved the provider-swapping problem at the LLM call level, leaving narrow room for a standalone SDK to justify adoption. The $500–3k/mo revenue band reflects that this is almost certainly a freemium or usage-based open-source play where monetization requires a hosted tier or enterprise license, neither of which is easy to bootstrap with a thin abstraction layer. The most likely failure mode is that developers either already use LangChain or just write a thin wrapper themselves in an afternoon, making the perceived switching cost to a new dependency higher than the pain it solves.