CodeSampleX

Sample

verify pkg:golang/golang.org/x/sys@v0.26.0

sha256:370602870a7a242465da9fca9306670109003261754700aaaaf3fcceff5d08d1

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 linux 24 · ubuntu · glibc 2.39 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
verify pkg:golang/golang.org/x/sys@v0.26.0
Packages
Created
2026-08-19T19:11:08Z

Contract

  1. unix.Geteuid and unix.Getegid retrieve effective process credentials matching os.Geteuid and os.Getegid
  2. unix.EpollCreate1 creates an epoll instance returning a valid file descriptor
  3. unix.FcntlInt queries file descriptor flags verifying close-on-exec status
  4. unix.Eventfd creates an event wait/notify file descriptor transferring counter values

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