CodeSampleX

Sample

verify pkg:golang/go.uber.org/zap@v1.27.0

sha256:bc8e7f806cab65973ecf75052facfecd9ac394240486dd1a89f9ea5682ea4cf7

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
3
Verification level
L4_CROSS_PASS
Declared environment windows 10 x64 go vm

Verification-run environments

Environment Contract Stages Run
go 1.26 · linux alpine/x64 · docker ed25519:2a6aa94bf40f1df0 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-19
go 1.26 · linux alpine/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · golang@1		 2026-08-20
go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · golang@1		 2026-08-20

Case

HOW
Goal
verify pkg:golang/go.uber.org/zap@v1.27.0
Packages
Created
2026-08-19T21:57:15Z

Contract

  1. CreateJSONBufferLogger creates a zap.Logger configured with a JSON encoder writing to an in-memory buffer
  2. LogInfoWithFields writes an info-level log entry containing structured string and integer fields to the target buffer
  3. CreateChildLogger derives a child logger with preset context fields that appear in subsequent logs

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