schema-spec SKILL.md skillA
schema-spec from qa-aman/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add qa-aman/claude-skills/schema-spec@git:20260303.8412b01Pins git:20260303.8412b01 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- qa-aman/claude-skills
- Path
skills/by-role/data-engineer/schema-spec/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260303.8412b01, committed Mar 3, 2026
- Size
- 5,605 bytes
- Repository stars
- 21
- License
- MIT
Write a data schema specification document. Use when the user says "schema spec", "document this schema", "schema design doc", "data model spec", "table spec", "field definitions", "schema contract", "data dictionary", "define these fields", or needs to formally document a database schema, event schema, or API payload schema - even if they don't explicitly say "schema spec".
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
## Overview Based on **Fundamentals of Data Engineering** (Reis & Housley) and **Designing Data-Intensive Applications** (Kleppmann). A schema spec is the data contract between producers and consumers. Kleppmann's rule: schema changes are the most dangerous category of change in a data system - the spec exists to make schema evolution explicit and backward-compatible. The test: can a consumer engineer write a query or build an integration using only this document, without reading source code or asking the producer team? ## Workflow ### Step 1: Write the schema header ``` Schema: [table name / event name / object name] Domain: [which product or service owns this data] Owner: [team] Type: [relational table / event / API payload / Avro / Parquet / JSON] Storage: [database name, topic name, or S3 path] Created: [date] Last modified: [date] Version: [v1 / v2 / etc.] ``` ### Step 2: Document each field Use a table for readability: | Field | Type | Nullable | Default | Description | |-------|------|----------|---------|-------------| | id | UUID | No | — | Unique record identifier, generated at insert | | user_id | BIGINT | No | — | Foreign key to users.id | …
Read the whole file at its exact version.
How to install
mdr add qa-aman/claude-skills/schema-spec@sha256:ab125915576f9b65The line at the top of this page pins the label git:20260303.8412b01, 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_ws74cbar7fmlegag)
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Versions
The registry has recorded 1 version of this file, committed on Mar 3, 2026.
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 (5605 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
qa-aman/claude-skills · 21 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ws74cbar7fmlegag GET https://markdownregistry.com/api/v1/resolve?ref=qa-aman/claude-skills/schema-spec GET https://markdownregistry.com/api/v1/blob/ab125915576f9b65b42dfac44324fdce9b1261c769be06f7ec3301fab5d98182
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.