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Design doc v2. Section 1.13 (Encoding-explicit) updated with placeholder scheme: float (general) / integer (general) / Scalar (linear/geo/tensor alg) / float64 (resolved). Section 3.1, 3.2, 3.3, 3.4 tier tables updated: 5 wrong re-encodings removed (set/kind, function/procedure, parameter/argument, input/arg, proof/construction, partial in 4.4). 4 template notations in 3.14 (B default, C++/Odin/Jai opt-in). 3 new entries added: 1.13 (<< / >>), 3.19 (Markov chain), 3.20 (PolyTimeAdversary), 4.25 (correlation), 4.26 (<< / >> with tolerance). Section 3.5 note added: pseudo sectr lang is incomplete and needs adapting (per user 2026-06-23). Section 10 added: per-language rendering pointer to lexicon.md 9. v1 state preserved in git history; v2 is the current state. 13 sections + 2 appendices.