CodeSampleX

Sample

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

sha256:dda546513fb98858e68752d9fcc6a1ec70df129c2d8065144a0a3b1a9104f0a4

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…
2026-08-26

Case

HOW
Goal
verify chunkreader.ChunkReader.Next in pkg:golang/github.com/jackc/chunkreader/v2@v2.0.1
Packages
Symbols
  • chunkreader.ChunkReader.Next
Created
2026-08-26T05:09:03Z

Contract

  1. Next(n) returns a slice of exactly n bytes from the reader when n bytes are available
  2. Next returns io.EOF and nil buffer when attempting to read at EOF
  3. Next returns io.ErrUnexpectedEOF and nil buffer when fewer than n bytes remain before EOF
  4. Next(0) returns an empty slice and nil error
  5. Next successfully reads across multiple internal chunk buffer boundaries

Files

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

Download the source artifact (tar.gz)

Origin Seeder

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