CodeSampleX

Sample

verify pkg:pypi/anyio@4.13.0 BlockingPortal

sha256:5084968dc63b8812beaca87828d6ac1dfec72280eace227fd5859653f078a081

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 BlockingPortal
Packages
Symbols
  • anyio.from_thread.BlockingPortal
  • anyio.from_thread.start_blocking_portal
Environment
python 3.12
Created
2026-08-20T10:37:26Z

Contract

  1. start_blocking_portal context manager runs an async event loop in a background thread
  2. BlockingPortal.call executes an async coroutine from synchronous thread and returns the result
  3. BlockingPortal.start_task_soon spawns a concurrent async task inside the portal event loop
  4. BlockingPortal.wrap_async_context_manager adapts an async context manager for use in synchronous threads
  5. BlockingPortal cleans up and stops the portal background thread upon exit

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