migrate-to-shoehorn SKILL.md skillA

This file is byte-identical to the first copy the registry indexed, one of 6 indexed copies. Same content hash, so the same checks give both the same grade.

migrate-to-shoehorn from asymmetric-al/core is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add asymmetric-al/core/migrate-to-shoehorn@git:20260430.3022c5f

Pins git:20260430.3022c5f in mdr.lock. Pin the fingerprint instead.

Audit grade

A, 17 of 17 checks passed

Kind

SKILL.md skill

Repository

asymmetric-al/core

Path

.agents/skills/migrate-to-shoehorn/SKILL.md

Versions recorded

1

Latest version

git:20260430.3022c5f, committed Apr 30, 2026

Size

2,795 bytes

Repository stars

379

License

AGPL-3.0

Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.

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

# Migrate to Shoehorn

## Why shoehorn?

`shoehorn` lets you pass partial data in tests while keeping TypeScript happy. It replaces `as` assertions with type-safe alternatives.

**Test code only.** Never use shoehorn in production code.

Problems with `as` in tests:

- Trained not to use it
- Must manually specify target type
- Double-as (`as unknown as Type`) for intentionally wrong data

## Install

```bash
npm i @total-typescript/shoehorn
```

## Migration patterns

### Large objects with few needed properties

Before:

```ts
type Request = {
  body: { id: string };
  headers: Record<string, string>;
  cookies: Record<string, string>;
  // ...20 more properties
};

it("gets user by id", () => {
  // Only care about body.id but must fake entire Request
  getUser({
    body: { id: "123" },
    headers: {},
    cookies: {},
    // ...fake all 20 properties
  });
});
```

After:

```ts
import { fromPartial } from "@total-typescript/shoehorn";

it("gets user by id", () => {
  getUser(
    fromPartial({
      body: { id: "123" },
    }),
  );
});
```

### `as Type` → `fromPartial()`

Before:

```ts
getUser({ body: { id: "123" } } as Request);
```

After:

```ts
…

Read the whole file at its exact version.

How to install

mdr add asymmetric-al/core/migrate-to-shoehorn@sha256:de4da4c11d924fac

[![mdr](https://markdownregistry.com/badge/art_b2oaii4nyl4vrv54.svg)](https://markdownregistry.com/a/art_b2oaii4nyl4vrv54)

Versions

The registry has recorded 1 version of this file, committed on Apr 30, 2026.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_b2oaii4nyl4vrv54
GET https://markdownregistry.com/api/v1/resolve?ref=asymmetric-al/core/migrate-to-shoehorn
GET https://markdownregistry.com/api/v1/blob/de4da4c11d924fac79c924b2ee3d2db4a5cb98386eb490a599119463d036ae72

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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