Show HN: Phantom – Open-source AI agent on its own VM that rewrites its config vs Show HN: Agent Kernel – Three Markdown files that make any AI agent stateful

Show HN: Phantom – Open-source AI agent on its own VM that rewrites its config vs Show HN: Agent Kernel – Three Markdown files that make any AI agent stateful 2026年の徹底比較。各AIの評価・価格・強み・制限を並べて確認し、最適なものを選びましょう。