CodeSampleX

Sample

verify pkg:golang/github.com/google/uuid@v1.6.0

sha256:4cd2d537f5859733028b6e8b57d958bb439a3ec5d122f38717a1d78440738074

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 windows 11 x64 go

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1		 2026-08-19

Case

HOW
Goal
verify pkg:golang/github.com/google/uuid@v1.6.0
Packages
Symbols
  • uuid.UUID.MarshalBinary
  • uuid.UUID.UnmarshalBinary
  • uuid.UUID.MarshalText
  • uuid.UUID.UnmarshalText
Created
2026-08-18T21:10:25Z

Contract

  1. uuid.UUID MarshalBinary returns exact 16-byte representation matching UUID bytes
  2. uuid.UUID UnmarshalBinary decodes valid 16-byte slice into matching UUID
  3. uuid.UUID UnmarshalBinary returns error for byte slices not equal to 16 bytes
  4. uuid.UUID MarshalText returns 36-byte canonical string representation
  5. uuid.UUID UnmarshalText decodes valid UUID text into matching UUID
  6. uuid.UUID UnmarshalText returns error for invalid text input

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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