CodeSampleX

Sample

verify pkg:golang/github.com/shopspring/decimal@v1.4.0

sha256:a2eaf5e3db2946cb2e406f03b762e73061614f77cba1eebf400c0cfac08dd59a

Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures. Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments. MIT-0

Execution evidence

Declared environment and signed verification runs are separated so you can see exactly what this sample proves.

Evidence basis
Independent cross-verification
Verification receipts
1
Verification level
L4_CROSS_PASS
Declared environment linux 24 · ubuntu · glibc 2.39 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1
2026-08-20

Case

HOW
Goal
verify pkg:golang/github.com/shopspring/decimal@v1.4.0
Packages
Created
2026-08-20T13:08:18Z

Contract

  1. decimal.NewFromString parses exact decimal representations without binary floating-point inaccuracy
  2. decimal.Decimal arithmetic operations Add, Sub, Mul, and DivRound perform exact arithmetic
  3. decimal.Decimal rounding methods Round and RoundBank round to specified precision using standard and banker's rounding
  4. decimal.Decimal comparison methods Equal, GreaterThan, and LessThan compare numeric values independently of scale representation
  5. decimal.Decimal MarshalJSON and UnmarshalJSON serialize and deserialize decimal values as valid JSON numbers

Files

  • PROMPT.md
  • csx.json
  • go.mod
  • go.sum
  • main.go
  • spec.json
  • test/contract.go

Download the source artifact (tar.gz)

Origin Seeder

anonymous