CodeSampleX

Sample

verify pkg:pypi/anyio@4.13.0 CapacityLimiter

sha256:fd0d9fb4d59def2700c31c64aea7e94af6c77c39b0c72e05fbea4f353eeb3e1b

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 CapacityLimiter
Packages
Symbols
  • anyio.CapacityLimiter
Environment
python 3.12
Created
2026-08-20T10:15:23Z

Contract

  1. async context manager acquires and releases limiter tokens automatically
  2. CapacityLimiter manages token allocation and bounds concurrent access
  3. total_tokens property allows dynamic adjustment of capacity limit
  4. acquire and release methods control manual token acquisition and release
  5. acquire_nowait provides non-blocking token acquisition

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