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Adds Go unary prefix operators per Go spec § Operators: +x -x !x ^x *p &v <-ch gp-parse-unary is recursive (so !!x and -^x chain correctly) and sits between gp-parse-expr and gp-parse-primary — unary therefore always binds tighter than any binary op without needing a unary entry in the precedence table. Symbols +, -, *, &, ^ are shared between unary and binary forms; the positional split (expression-start sees unary, mid-expression sees binary) disambiguates them cleanly with no lookback. Unary nodes are single-arg ast-app: (ast-app (ast-var OP) (list OPERAND)) parse 37/37, total 166/166. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>