Home / hamza-ali-shahjahan / hamzaish · GitHub

deprecation-and-migration SKILL.md skillA

deprecation-and-migration from hamza-ali-shahjahan/hamzaish is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add hamza-ali-shahjahan/hamzaish/deprecation-and-migration@git:20260627.bd6e9ea

Pins git:20260627.bd6e9ea in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: hamza-ali-shahjahan/hamzaish
Path: factory/skills/deprecation-and-migration/SKILL.md
Versions recorded: 1
Latest version: git:20260627.bd6e9ea, committed Jun 27, 2026
Size: 9,000 bytes
Repository stars: 11
License: MIT

Manages deprecation and migration. Use when removing old systems, APIs, or features. Use when migrating users from one implementation to another. Use when deciding whether to maintain or sunset existing code.

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

# Deprecation and Migration

## Overview

Code is a liability, not an asset. Every line of code has ongoing maintenance cost — bugs to fix, dependencies to update, security patches to apply, and new engineers to onboard. Deprecation is the discipline of removing code that no longer earns its keep, and migration is the process of moving users safely from the old to the new.

Most engineering organizations are good at building things. Few are good at removing them. This skill addresses that gap.

## When to Use

- Replacing an old system, API, or library with a new one
- Sunsetting a feature that's no longer needed
- Consolidating duplicate implementations
- Removing dead code that nobody owns but everybody depends on
- Planning the lifecycle of a new system (deprecation planning starts at design time)
- Deciding whether to maintain a legacy system or invest in migration

## Core Principles

### Code Is a Liability
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add hamza-ali-shahjahan/hamzaish/deprecation-and-migration@sha256:bf2d9b4e3bc635b3

The line at the top of this page pins the label git:20260627.bd6e9ea, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_73z23urfxhcmq4dz.svg)](https://markdownregistry.com/a/art_73z23urfxhcmq4dz)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Jun 27, 2026.

version	committed	commit	size	audit
git:20260627.bd6e9ea latest	2026-06-27	bd6e9ea	9,000 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (9000 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

hamza-ali-shahjahan/hamzaish · 11 stars · license MIT · pushed 2026-10-07 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_73z23urfxhcmq4dz
GET https://markdownregistry.com/api/v1/resolve?ref=hamza-ali-shahjahan/hamzaish/deprecation-and-migration
GET https://markdownregistry.com/api/v1/blob/bf2d9b4e3bc635b32e8de70b0ab41e4395d7b585e6474347c53ce89d45fbdb75

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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