pydantic SKILL.md skillA
pydantic from codeatcode/oss-ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add codeatcode/oss-ai-skills/pydantic@v2.0.0Pins v2.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- codeatcode/oss-ai-skills
- Path
frameworks/pydantic/SKILL.md- Versions recorded
- 7
- Latest version
- v2.0.0, committed Oct 28, 2026
- First version recorded
- Mar 27, 2026
- Size
- 9,676 bytes
- Repository stars
- 30
- License
- GPL-3.0
Use when validating and serializing Python data with Pydantic v2 - models, field and model validators, constrained and special types, TypeAdapter, discriminated unions, BaseSettings, or FastAPI integration.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
> **Objective:** Use this skill to prevent data-validation gaps and serialization bugs by enforcing boundary-level validation, Field constraints over manual checks, and v2 migration patterns that avoid silent coercion failures.
# Pydantic
Data validation using Python type annotations.
## Overview
Pydantic provides data validation and settings management using Python type hints. Validates at runtime and generates JSON Schema.
**Source**: https://docs.pydantic.dev/ | https://github.com/pydantic/pydantic
## Installation
```bash
pip install pydantic # Core
pip install pydantic[email] # Email validation
pip install pydantic orjson # Best performance
pip install pydantic-settings # Settings management
```
## Quick Start
```python
from pydantic import BaseModel, Field
class User(BaseModel):
id: int
name: str
email: str
age: int | None = None
# Validation + coercion
user = User(id="1", name="John", email="john@example.com") # id coerced to int
# From dict/JSON
user = User.model_validate({"id": 2, "name": "Jane", "email": "jane@example.com"})
user = User.model_validate_json('{"id": 3, "name": "Bob", "email": "bob@example.com"}')
# Serialization
…Read the whole file at its exact version.
How to install
mdr add codeatcode/oss-ai-skills/pydantic@sha256:c9cd68ac61e1bd7dThe line at the top of this page pins the label v2.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_amfth6fses5tsyuh)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Mar 27, 2026 and Oct 28, 2026, about one every 36 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.0 latest | 2026-10-28 | 83beb90 | 9,676 B | A | view · diff |
| v2.0.0 | 2026-10-01 | 268819e | 9,336 B | A | view · diff |
| v2.0.0 | 2026-09-23 | f8bf298 | 11,484 B | A | view · diff |
| v1.0.0 | 2026-05-21 | 23ac646 | 36,803 B | A | view · diff |
| git:20260521.c39a92d | 2026-05-21 | c39a92d | 36,515 B | C | view · diff |
| v1.0.0 | 2026-04-20 | e5744c4 | 30,364 B | A | view · diff |
| v1.0.0 | 2026-03-27 | f8d43a7 | 30,374 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9676 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
codeatcode/oss-ai-skills · 30 stars · license GPL-3.0 · pushed 2026-10-28 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_amfth6fses5tsyuh GET https://markdownregistry.com/api/v1/resolve?ref=codeatcode/oss-ai-skills/pydantic GET https://markdownregistry.com/api/v1/blob/c9cd68ac61e1bd7d054770816d6f8d704ebd887efcdfb117c595fda750b108bd
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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