CodeSampleX

Sample

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

sha256:6b967cee109f2f2ad691465cdaff0e77188fc0a25c8e6c260468551376d1ee8f

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
  • github.com/google/uuid.NewString
  • github.com/google/uuid.Validate
  • github.com/google/uuid.Parse
  • github.com/google/uuid.FromBytes
  • github.com/google/uuid.UUID.URN
  • github.com/google/uuid.UUID.MarshalText
  • github.com/google/uuid.UUID.UnmarshalText
  • github.com/google/uuid.UUID.MarshalBinary
  • github.com/google/uuid.UUID.UnmarshalBinary
Created
2026-08-19T02:10:41Z

Contract

  1. uuid.NewString generates a valid 36-character UUID string with Version 4 and RFC4122 variant
  2. uuid.Validate accepts valid standard UUID strings and rejects malformed strings
  3. uuid.Parse converts valid UUID string into 16-byte UUID value
  4. uuid.FromBytes creates UUID from 16-byte slice and rejects slices not equal to 16 bytes
  5. uuid.UUID.URN formats UUID with standard urn:uuid: prefix
  6. uuid.UUID.MarshalText and uuid.UUID.UnmarshalText round-trip UUID text representation
  7. uuid.UUID.MarshalBinary and uuid.UUID.UnmarshalBinary round-trip 16-byte binary representation

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