gof-decorator SKILL.md skillA

gof-decorator from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add robsonkades/agent-skills/gof-decorator@git:20260927.9ecadfd

Pins 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-decorator/SKILL.md
Versions recorded
5
Latest version
git:20260927.9ecadfd, committed Sep 27, 2026
First version recorded
Sep 3, 2026
Size
13,603 bytes
Repository stars
3
License
Apache-2.0

Decorator in modern Java: wrapping an object in something of its own interface to add behaviour, stackably, at runtime — and the fact that the stacking order changes the semantics. Covers the ordering of retry, timeout, circuit breaker, cache, metrics and logging and what each arrangement means, retry amplification across layers, the identity loss that breaks ==, instanceof and listener deregistration, when a framework interceptor is the same pattern already provided, and the thread-safety a…

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

# Decorator

## Purpose

Add behaviour to one object without changing its type, and let several such additions compose.
The defining property is that the wrapper implements the same interface as what it wraps — which
is what makes the layers stackable, and what makes their order meaningful.

Order is not a detail. Retry outside timeout and timeout outside retry are both reasonable
designs with different semantics, and a stack assembled without deciding which one is intended
will behave in whichever way the wiring happened to produce.

Start with the caller's contract and the effective client/framework configuration: ordinary
success, failure, cache hit and cancellation may traverse different layers. Preserve accepted
return values, nullability, failure classification, ownership and mandatory checks across that
composition; implementing the same interface alone does not establish substitutability. Inspect
existing tests and policies before asking about material gaps such as replay safety or cache
eligibility. Keep an adequate existing client or simpler composed class when no added layer is needed.

## When it is the answer

```text
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add robsonkades/agent-skills/gof-decorator@sha256:f7ec92adddfb58fe

The 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_btf6ignzyoa2wnup.svg)](https://markdownregistry.com/a/art_btf6ignzyoa2wnup)

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

Versions

The registry has recorded 5 versions of this file, between Sep 3, 2026 and Sep 27, 2026, about one every 6 days.

versioncommittedcommitsizeaudit
git:20260927.9ecadfd latest2026-09-27 9ecadfd 13,603 BA view · diff
git:20260923.832673e2026-09-23 832673e 12,682 BA view · diff
git:20260911.37b054b2026-09-11 37b054b 12,534 BA view · diff
git:20260906.e6ad4bd2026-09-06 e6ad4bd 10,891 BA view · diff
git:20260903.f1995302026-09-03 f199530 10,397 BA 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 (13603 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

robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_btf6ignzyoa2wnup
GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/gof-decorator
GET https://markdownregistry.com/api/v1/blob/f7ec92adddfb58fe69bbfff1f38378c6d13fee97b84513ada7d19cb41d479285

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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