import type { ToolInfo } from "@earendil-works/pi-coding-agent";

const NON_MUTATING_BUILTINS = new Set(["read", "grep", "find", "ls"]);

export function isGenuineNonMutatingBuiltin(tool: ToolInfo): boolean {
  if (!NON_MUTATING_BUILTINS.has(tool.name)) return false;
  return (
    tool.sourceInfo.source === "builtin" &&
    tool.sourceInfo.path === `<builtin:${tool.name}>` &&
    tool.sourceInfo.scope === "temporary" &&
    tool.sourceInfo.origin === "top-level"
  );
}