gof-composite SKILL.md skillA
gof-composite 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-composite@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-composite/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260927.9ecadfd, committed Sep 27, 2026
- First version recorded
- Sep 3, 2026
- Size
- 12,243 bytes
- Repository stars
- 3
- License
- Apache-2.0
Composite in modern Java: treating a leaf and a tree of leaves through one interface, and the hazards that come with a recursive structure. Covers the transparent-versus-safe trade-off and when a sealed interface with exhaustive pattern matching changes that trade-off, unbounded depth and StackOverflowError, cycles introduced by parent pointers and the recursion hazards they create in equals, hashCode and toString, mutation during traversal, and why remote children require additional…
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
# Composite ## Purpose Let a client treat one thing and a group of things identically, recursively. The pattern is correct exactly when the client's operation is genuinely indifferent to the distinction — the size of a file or a directory, the total of a line or a section, whether a permission is granted, whether a rule passes. Everything difficult about Composite comes from the structure rather than the interface: trees have depth, may acquire cycles, are mutated while being walked, and are serialised. Those are the failures that reach production; the uniform interface is the easy part. Start with the actual consumer operation and accepted semantics: what is contained, whether nodes can be shared, what counts as identity, and whether aggregation is per path or per distinct node. Reuse existing examples, construction rules and consistency requirements before asking material missing-context questions. Keep a simple collection or existing bounded tree when it already meets the need; the pattern name does not define traversal, ownership or authorization policy. ## When it is the answer ```text The structure is genuinely recursive — a composite can contain …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/gof-composite@sha256:692e3b02be1ee102The 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_bb7bjtjs2arzadyi)
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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 | 12,243 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 11,219 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 10,805 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 9,058 B | A | view · diff |
| git:20260903.f199530 | 2026-09-03 | f199530 | 8,681 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 (12243 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_bb7bjtjs2arzadyi GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/gof-composite GET https://markdownregistry.com/api/v1/blob/692e3b02be1ee1026696ef3ce93071950d8e22feeb2f7352d4056a00d7efbb60
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.