feat(script): add interpreter core engine (#57)#63
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements Phase 1 (#57) of the script interpreter (#21): - ScriptError with 23 typed error codes (symbols) - ScriptNumber: LE sign-magnitude encoding/decoding, arbitrary-precision arithmetic (truncated-toward-zero division, dividend-sign modulo), minimal encoding validation, minimally_encode for padding removal - Stack: FORTH-like operations (dup_n, drop_n, rot_n, swap_n, over_n, pick_n, roll_n, nip_n, tuck), Bitcoin consensus boolean encoding (negative zero = false), type-converting push/pop for bytes/ints/bools - Interpreter skeleton with evaluate/verify class methods Closes #57 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
ScriptErrorwith 23 typed error codes,ScriptNumberwith LE sign-magnitude encoding and arbitrary-precision arithmetic,Stackwith FORTH-like operations and Bitcoin consensus boolean encoding, andInterpreterskeleton withevaluate/verifyclass methodsTest plan
bundle exec rspec spec/bsv/script/interpreter/— all 113 interpreter specs passbundle exec rubocop lib/bsv/script/interpreter/ lib/bsv/script.rb— 0 offencesbundle exec rake— full suite green (711 examples, 0 failures)Closes #57
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