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AI · November 14, 2025

What if MCP agents were JIT compiled to code?

Hi HN! a1 is a cost-optimizing AOT/JIT compiler for AI agents. I thought I'd post here and see if folks are interested in early using/contributing/providing feedback. Paper coming soon. -- Caleb (PhD student @ Stanford MAST)

What if MCP agents were JIT compiled to code? launched on November 14, 2025 with 6 votes, #2,995 of 9,796 launches that month and more than 75% of that year's launches.

What it does

The agent-to-code compiler that optimizes AI for speed 🏎️ and safety 🏁 - stanford-mast/a1

A1 is a new kind of agent framework. It takes an Agent (a set of tools and a description) and compiles either AOT (ahead-of-time) into a Tool or JIT (just-in-time) for immediate execution optimized for each unique agent input. uv pip install a1-compiler # or pip install a1-compiler 🏎️ Why use an agent compiler? An agent compiler is a direct replacement for agent frameworks such as Langchain or aisdk, where you define an Agent and run. The diference is: Agent compilers emerged from frustration with the MCP protocol and SOTA agent frameworks where every agent runs a static while loop program. Slow, unsafe, and highly nondeterministic. An agent compiler can perform the same while loop (just…from github.com

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