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gp-parse-expr / gp-pratt-loop implement classic Pratt climbing against go-precedence-table (entry shape from lib/guest/pratt.sx). The kit gives us pratt-op-lookup + accessors; the climbing loop itself stays per-language (per kit header — Lua and Prolog have opposite conventions). Left-associative ops raise the right-recursion min by 1; right- associative would keep prec. All Go binary operators are left-assoc. AST shape: a binary node is emitted as (ast-app (ast-var OP) [LHS RHS]) — canonical ast-app rather than a Go-specific binary node, since a future evaluator can recognise operator-named apps without losing information. Coverage: equal-prec left-to-right, * tighter than +, && tighter than ||, comparison tighter than &&, long left-assoc chains, mixed literal+ident operands. parse 26/26, total 155/155. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>