Mistral Was Granted a US Patent on Executing Tool Calls as Sandboxed Code — the Pattern Half the Agent Ecosystem Now Uses
USPTO Official Gazette / Hacker News·medium signal
US 12,670,045 B1, assigned to Mistral AI (Paris), was filed March 4, 2026 and granted June 30, 2026. Claim 1 covers an LLM generating "a code block in a programming language... configured to encapsulate the one or more tool calls," executing it in a sandbox, pausing on pending tool calls, transmitting them to a client, and resuming with substituted outputs. That is a close description of code-execution-as-tool-orchestration as shipped across current agent frameworks, which is why the USPTO gazette entry drew 219 points and 184 comments — a patent-grant page is not normally HN front-page material.