Anthropic on October 1, 2026 published Claude-shaped science, a guest post by theoretical physicist Matthew Schwartz describing BootLoops, an open-source toolkit he built with Claude for exact calculations in quantitative science. BootLoops 1.0 was released publicly the same day under the MIT License. From Scattering Amplitudes to a General Harness Schwartz writes that he began the project when Anthropic released Claude Fable 5 in Summer 2026, after an earlier experiment, described in his…