majiayu000/spellbook · skills/data-contract-migrations/SKILL.md

data-contract-migrations skillA

data-contract-migrations is agent-read markdown (skill) from majiayu000/spellbook: Design and verify data contracts, schema changes, migrations, rollbacks, backfills, compatibility windows, tenant isolation, and API-to-database field mapping. Use when changing database schema, event payloads, persisted documents, analytics tables, multi-tenant data boundaries, or any user-visible data contract where silent fallback or undeclared fields would be dangerous..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add majiayu000/spellbook/data-contract-migrations@git:20260626.97a677e
Exact content
mdr add majiayu000/spellbook/data-contract-migrations@sha256:bda25c39a77c8460

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_o3kvi4k47egv5eft.svg)](https://markdownregistry.com/a/art_o3kvi4k47egv5eft)

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Versions

versioncommittedcommitsizeaudit
git:20260626.97a677e latest2026-06-26 97a677e 2,408 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (2408 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

GitHub

majiayu000/spellbook · 280 stars · license MIT · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_o3kvi4k47egv5eft
GET https://markdownregistry.com/api/v1/resolve?ref=majiayu000/spellbook/data-contract-migrations
GET https://markdownregistry.com/api/v1/blob/bda25c39a77c846064fe422629922d892670df4489b9b9fbcc36e544df4da0cd

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.