---
language:
- en
license: cc0-1.0
task_categories:
- tabular-classification
tags:
- schema-drift
- regression-testing
- api-contracts
- synthetic-data
pretty_name: Synthetic Schema Drift Regression Preview
size_categories:
- n<1K
---

# Synthetic Schema Drift Regression Preview

Three deliberately small, synthetic cases for testing how a schema-change review or regression gate handles common contract changes:

- a removed required field;
- a field type change; and
- a moved nested field.

Every record is fictional and marked `synthetic: true`. This preview contains no customer data, credentials, production API response, web extraction, or paid-product file.

## Contents

`schema-drift-preview.jsonl` contains one JSON object per case. Each object has a `baseline_schema`, `candidate_schema`, `expected_result`, and a concise rationale. It is designed for local test fixtures, examples, and evaluation scaffolding—not for production compatibility decisions by itself.

## Limitations

- The three cases are illustrative, not a complete schema-drift taxonomy.
- No real API, dataset, or service is represented.
- Consumers remain responsible for their own compatibility policy, test coverage, deployment checks, and source-right review.
- This is not a hosted API, monitoring service, security assurance, or guarantee that all breaking changes will be detected.

## Related paid developer tool

For a self-hosted Node.js tool that compares bounded dataset snapshots for row, field, type, and schema drift, see the [Dataset Diff and Schema Drift API](https://zentrafoundry.gumroad.com/l/dataset-diff-and-schema-drift-api).

## Release checklist

This local package is prepared for a future Hugging Face dataset repository. Before publishing: verify the NimbliqueStudio organization, choose a public repository name, upload these exact files without modification, confirm the generated public URL while signed out, record that URL in `nimblique-marketing-channels.md`, and then log the first promotion in `publication-log.csv`.