Sample
pydantic 2.13.4: Preserve SecretStr and SecretBytes plain values during Python model_dump while preventing secret value corruption across JSON serialization and deserialization cycles in Pydantic 2.13.4
Verified sample for pypi pydantic 2.13.4: Preserve SecretStr and SecretBytes plain values during Python model_dump while preventing secret value corruption…
sha256:e5a1e6b5f189f5c49af04e8a71b357635addc81edb18abeb301d700e63678557
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
- 2
- Signing keys that built it
- 2
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-17 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
Case
HOW- Goal
- Preserve SecretStr and SecretBytes plain values during Python model_dump while preventing secret value corruption across JSON serialization and deserialization cycles in Pydantic 2.13.4
- Packages
- Symbols
-
- pydantic.types.SecretStr
- pydantic.types.SecretBytes
- pydantic.BaseModel.model_dump
- pydantic.BaseModel.model_dump_json
- pydantic.BaseModel.model_validate
- pydantic.BaseModel.model_validate_json
- Environment
- python
- Created
- 2026-08-17T06:49:32Z
Contract
- model_dump_json masks SecretStr and SecretBytes to asterisks, and subsequent model_validate_json silently parses the mask string as the new secret value instead of preserving the secret or raising an error.
- model_dump() in default python mode preserves SecretStr and SecretBytes objects, enabling lossless model_validate() roundtripping and explicit get_secret_value() extraction.
- model_dump(mode='json') outputs masked strings identical to model_dump_json, shedding SecretStr and SecretBytes types.
- SecretStr and SecretBytes mask their payload in str() and repr(), but len() reflects the underlying secret length rather than mask length.
- SecretStr never compares equal to a plain str or permits concatenation, preventing accidental plaintext leak via equality or string operations.
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- src/__init__.py
- src/models.py
- test/contract.py