CodeSampleX

Sample

verify pkg:pypi/anyio@4.13.0 CancelScope

sha256:8a3f292b274208fa458a26d54851fb1e7ee10f7a616bf666ec21e3a24287d997

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
2
Verification level
L4_CROSS_PASS
Declared environment python 3.12 linux 24 · ubuntu · glibc 2.39 x64 python 3.12 python pip 24

Verification-run environments

Environment Contract Stages Run
python 3.12 · linux alpine/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · python@1		 2026-08-20
python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · python@1		 2026-08-20

Case

HOW
Goal
verify pkg:pypi/anyio@4.13.0 CancelScope
Packages
Symbols
  • anyio.CancelScope
Environment
python 3.12
Created
2026-08-20T10:34:05Z

Contract

  1. CancelScope context manager allows scoping cancellation for async execution
  2. cancel method triggers cancellation causing subsequent async operations to abort
  3. cancelled_caught property indicates whether a cancellation exception was caught
  4. deadline property triggers automatic cancellation when current time reaches deadline
  5. shield property protects code block from cancellation triggered by outer scopes

Files

  • PROMPT.md
  • csx.json
  • pyproject.toml
  • requirements.txt
  • spec.json
  • src/__init__.py
  • src/sample.py
  • test/contract.py

Download the source artifact (tar.gz)

Origin Seeder

anonymous