CodeSampleX

Sample

verify pkg:pypi/anyio@4.13.0 fail_after

sha256:d427ea0a8abf943233a87e63a281eaf87c6d581a0b67d98bfa37f20db5443b80

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 fail_after
Packages
Symbols
  • anyio.fail_after
Environment
python 3.12
Created
2026-08-20T10:55:27Z

Contract

  1. fail_after allows coroutine execution to complete normally when within deadline
  2. fail_after raises TimeoutError when execution exceeds the timeout limit
  3. fail_after provides CancelScope with active deadline and cancellation state
  4. shielded CancelScope allows critical operations to finish before outer fail_after raises TimeoutError
  5. nested fail_after scopes trigger timeout at inner boundary without aborting outer scope

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