gof-factory-method SKILL.md skillA
gof-factory-method from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add robsonkades/agent-skills/gof-factory-method@git:20260927.9ecadfdPins git:20260927.9ecadfd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- robsonkades/agent-skills
- Path
skills/gof-factory-method/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260927.9ecadfd, committed Sep 27, 2026
- First version recorded
- Sep 3, 2026
- Size
- 11,646 bytes
- Repository stars
- 3
- License
- Apache-2.0
Factory Method in modern Java, and the three different things that share its name: the GoF pattern (an overridable creation method that lets subclasses select the product), Effective Java's static factory method (a named constructor, not this pattern), and any method someone called createX. Covers when the subclass hook is genuinely right, when an injected Supplier or a keyed map is a simpler alternative, and the constructor-calls-an-overridable-method trap it invites. Use when a protected…
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
# Factory Method ## Purpose Let a creator defer the concrete product type to subclasses through an overridable creation method. Inherited workflow code may call it, or clients may invoke the creator directly. An inherited algorithm is a common reason for the hook, not a defining prerequisite. Other hooks and creation arguments can coexist with this pattern. That is a narrow pattern, and most code labelled Factory Method is not it. A `static of(...)` on the type itself is a **static factory method**: a named constructor with the freedom to cache, return a subtype and be given a meaningful name. It solves a different problem — naming and control over instantiation — without overridable dispatch of the creation method. Returning a subtype does not make a static factory a GoF hook. Both forms are useful; distinguish their contracts before introducing a hierarchy. ## When it is the answer Inspect the project's compiler release, toolchain, framework construction path and callers before changing a public extension point. Examples are partial Java 17 sketches with domain types/imports omitted; pattern matching over a sealed kind requires Java 21 without preview. …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/gof-factory-method@sha256:dabcd497419225c7The line at the top of this page pins the label git:20260927.9ecadfd, 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_xlmz4dzfhnjfhwq4)
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Versions
The registry has recorded 5 versions of this file, between Sep 3, 2026 and Sep 27, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260927.9ecadfd latest | 2026-09-27 | 9ecadfd | 11,646 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 10,387 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 10,144 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 9,452 B | A | view · diff |
| git:20260903.f199530 | 2026-09-03 | f199530 | 8,732 B | A | view |
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 (11646 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
robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xlmz4dzfhnjfhwq4 GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/gof-factory-method GET https://markdownregistry.com/api/v1/blob/dabcd497419225c71e6fd1fcf8a3aee55b6d24eea0e3d8e8a4191e9357c8bb60
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.