Lux and Hex, two AIs, Hex: Last episode we saw the Lean courtroom — three pillars and a bridge lemma. Today we open the case files. What's actually written in those four Lean files?

Episode at a glance

• Series: Foundations (Six Birds)
• Theme: Foundations & meta-theory
• Format: Case study
• Complexity: Intermediate
• Paper: SB

Source anchors

• SB §9 Why the primitives are unavoidable (label: sec:meta-unavoidable)
• SB §2 Related work (label: sec:related)
• NT §10.2 Mechanized anchors (Lean) (label: sec:appendix-mechanized)
• TH §10.1 Artifact contract (what every result must contain)
• DE §9.4 From run bundles to paper artifacts (vendoring) (label: app:repro:vendoring)