Sample
Validate and sanitize field values across field_validator modes before, after, wrap, and plain with ValidationInfo sibling field access in Pydantic 2.13.4
sha256:6fc42f08c53cfa91e11c203149d5ee2a762fc18a2a45dec95f57cb89d5e805de
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 1
- Signing keys that built it
- 1
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1python:3.12-alpine@sha256:d09d15e60962… |
2026-08-28 |
Case
HOW- Goal
- Validate and sanitize field values across field_validator modes before, after, wrap, and plain with ValidationInfo sibling field access in Pydantic 2.13.4
- Packages
- Symbols
-
- pydantic.BaseModel
- pydantic.ValidationError
- pydantic.ValidationInfo
- pydantic.field_validator
- Environment
- python
- Created
- 2026-08-28T04:25:39Z
Contract
- Leaving field_validator mode unset defaults to 'after', running after core type coercion; inputs that fail core type coercion raise ValidationError before the after-validator executes.
- Configuring mode='before' allows intercepting and sanitizing raw, uncoerced inputs before Pydantic core type coercion and constraint validation.
- Configuring mode='wrap' passes the raw value and a wrap handler, enabling custom preprocessing, validation error interception or recovery, and postprocessing.
- Configuring mode='plain' replaces core validation entirely, allowing custom return types without executing Pydantic internal coercion.
- ValidationInfo.data exposes only sibling fields defined before the current field in model definition order; downstream fields are absent.
Files
- NOTES.md
- PROMPT.md
- csx.json
- requirements.lock
- requirements.txt
- spec.json
- src/__init__.py
- src/models.py
- test/contract.py
Origin Seeder
anonymous