CodeSampleX

Sample

verify pkg:golang/github.com/jackc/chunkreader/v2@v2.0.1

sha256:84a32428bdea7edc4f8e47757a2535121c3d9e323e0fca9f3a6dc0f189fcc873

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 linux 24 · ubuntu · glibc 2.39 x64 go

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…		 2026-08-23

Case

HOW
Goal
verify pkg:golang/github.com/jackc/chunkreader/v2@v2.0.1
Packages
Created
2026-08-23T17:19:13Z

Contract

  1. chunkreader.New initializes a ChunkReader with default 8192-byte minimum buffer length wrapping an io.Reader
  2. chunkreader.NewConfig initializes a ChunkReader with a custom Config specifying MinBufLen
  3. chunkreader.ChunkReader.Next returns consecutive slices of requested byte lengths from the underlying stream
  4. chunkreader.ChunkReader.Next expands internal buffer when requested chunk size exceeds MinBufLen
  5. chunkreader.ChunkReader.Next returns io.ErrUnexpectedEOF or io.EOF when underlying reader has fewer bytes than requested
  6. chunkreader.ChunkReader.Next guarantees caller ownership of returned byte slices across subsequent reads

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