CodeSampleX

Sample

verify pydantic.StringConstraints in pkg:pypi/pydantic@2.8.2

sha256:49eb80de1444ce018dc606e1386858bea171fb9475a33067c5c74953fd96224a

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

Execution context
python 3.12
Operating system
linux
Architecture
x64
Runtime
python 3.12
Language
python
Package manager
pip

Verification-run environments

python 3.12 · linux alpine/x64 · docker PASS
Execution context
python 3.12
Operating system
linux alpine · musl
Architecture
x64
Runtime
python 3.12
Language
python
Package manager
pip
Execution
container · docker

CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-19

Case

HOW
Goal
verify pydantic.StringConstraints in pkg:pypi/pydantic@2.8.2
Packages
Symbols
  • pydantic.BaseModel
  • pydantic.StringConstraints
  • BaseModel.model_validate
  • BaseModel.model_dump
  • pydantic.ValidationError.errors
Environment
python 3.12
Created
2026-08-18T13:19:48Z

Contract

  1. BaseModel.model_validate accepts spaced uppercase strings and bytes under non-strict StringConstraints and normalizes them.
  2. strip_whitespace evaluates before regex pattern matching, while to_upper executes after pattern matching in StringConstraints.
  3. min_length constraint checks stripped string length while validation errors preserve original user input.
  4. strict=True in StringConstraints rejects byte input with string_type error while accepting string input.
  5. Annotated StringConstraints on collection items reports per-item error locations and error types.

Files

  • PROMPT.md
  • csx.json
  • requirements.txt
  • spec.json
  • src/models.py
  • test/contract.py

Download the source artifact (tar.gz)

Origin Seeder

anonymous

Verification receipts

  • python 3.12 · linux alpine/x64 · docker PASS
    CONTAINER_RUN compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS python@1
    ed25519:2175b912ea1c23b1