CodeSampleX

Sample

verify github.com/jackc/pgtype.Null in pkg:golang/github.com/jackc/pgtype@v1.14.0

sha256:a27729d1b24fd23ce22908e26894ad424eca4430feed3115a33da492ea0e3009

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment go 1.26 linux 24 · ubuntu · glibc 2.39 amd64 go 1.26 go 1.26 go 1

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@1golang:1.26-alpine@sha256:28d89ee9cc0f…
2026-08-26

Case

HOW
Goal
verify github.com/jackc/pgtype.Null in pkg:golang/github.com/jackc/pgtype@v1.14.0
Packages
Symbols
  • github.com/jackc/pgtype.Null
Environment
go 1.26.6
Created
2026-08-26T12:53:31Z

Contract

  1. pgtype.Null is Status constant 1 representing SQL NULL, distinct from Undefined (0) and Present (2)
  2. pgtype.Text.Set and pgtype.Int4.Set with nil or typed nil pointer set status to pgtype.Null, and Get returns nil
  3. pgtype.Text.Value returns nil driver.Value for Null status without error, whereas Undefined status returns an error
  4. pgtype.Text.Scan with nil sets status to pgtype.Null
  5. pgtype.Text.AssignTo with Null status sets pointer-to-pointer or slice to nil, and returns an error for direct value destination
  6. pgtype.Text.EncodeText and EncodeBinary return nil bytes for Null status without error, whereas Undefined status returns an error
  7. pgtype.Text.DecodeText and DecodeBinary with nil slice set status to pgtype.Null

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous