CodeSampleX

Sample

text serialization with github.com/google/uuid MarshalText and UnmarshalText

sha256:00a1e6998c589f038cd7634013b7c187f0d4afcdb9af4d4194ad18a26b672642

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
text serialization with github.com/google/uuid MarshalText and UnmarshalText
Packages
Symbols
  • MarshalText
  • UnmarshalText
Created
2026-08-19T04:25:58Z

Contract

  1. UUID.MarshalText encodes UUID into standard 36-byte UTF-8 string representation without error
  2. UUID.UnmarshalText decodes standard 36-byte UUID text into matching UUID value
  3. UUID.UnmarshalText decodes 32-character hex and URN formatted byte slices
  4. UUID.UnmarshalText returns error for invalid format or invalid length byte slices
  5. UUID.MarshalText and UnmarshalText support uuid.Nil and round trip lossless conversion

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous