# schema-mapping

> Claude/Codex skill by [@googlecloudplatform](https://omgskills.com/library/googlecloudplatform/index.md) · 226 stars · Updated 2026-10-23

Guides the process of analyzing, mapping, and documenting transformations between source and target schemas for any database, data warehouse, or data platform. Focuses exclusively on creating a high-fidelity mapping plan (Mapping Manifesto). Used when initiating an ETL, ELT, or data integration task with schema mapping specification for multiple tables (i.e. more than 3 tables) before writing code. Do NOT use this skill for basic SQL generation without mapping requirements, or when the user already has a complete mapping specification.

## Install

```sh
git clone https://github.com/GoogleCloudPlatform/data-agent-kit-plugin /tmp/data-agent-kit-plugin && ln -s /tmp/data-agent-kit-plugin/skills/schema-mapping ~/.claude/skills/schema-mapping
```

## From README

Skill: Semantic Schema Mapping Planning Follow this structured process and procedures for analyzing source-to-target data relationships and creating a high-fidelity Mapping Plan (also known as a Mapping Manifesto). This process is platform-agnostic and should be used before generating any target-specific pipeline code. When this skill is loaded, you MUST use this plan and replace the existing generic plan. When to Use Use this skill when: You need to map schemas between a source dataset/database and a target destination database/warehouse. You are initiating an ETL, ELT, or data integration task. You need to identify schema gaps, data type conflicts, or aggregation requirements. -------------------------------------------------------------------------------- Required Input Variables Before creating the plan, you must obtain or request: SOURCESCHEMAS: Definitions (schemas, tables, fields, types) of the source data. TARGETSCHEMAS: Definitions of the desired target/destination schemas.

## Links

- HTML page: https://omgskills.com/library/googlecloudplatform/data-agent-kit-plugin/skills/schema-mapping/
- GitHub: https://github.com/GoogleCloudPlatform/data-agent-kit-plugin
- Author: [@googlecloudplatform](https://omgskills.com/library/googlecloudplatform/index.md)

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