gof-builder SKILL.md skillA
gof-builder 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-builder@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-builder/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260927.9ecadfd, committed Sep 27, 2026
- First version recorded
- Sep 3, 2026
- Size
- 11,242 bytes
- Repository stars
- 3
- License
- Apache-2.0
Builder in modern Java: distinguish the original GoF separation of construction process from representation from the Effective Java fluent value builder. Covers selection signals rather than parameter-count thresholds, staged builders, invariant placement, mutable-builder concurrency hazards, Lombok/JPA boundaries, performance evidence, and test data builders. Use for ambiguous or telescoping construction, incremental input, multiple representations, or a builder that permits invalid…
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
# Builder ## Purpose Make the construction of a complex object readable and safe. Java has no named arguments and no default parameter values; a builder can simulate both and gives one place where the whole object's invariants can be checked before publication. The original GoF pattern also separates a **construction process** from the representations it can produce: the same parser or director can drive a tree builder, text builder, or test builder. That is distinct from the now-common Effective Java fluent builder for one value type. Name which variant is intended; their selection criteria and failure modes differ. For a fluent value builder, readability, defaults, staged input and invariant enforcement are the usual justification. For a GoF representation builder, the justification is reuse of the construction process across outputs. A builder that provides neither is ceremony. Examples use Java 17 records/sealed types, without preview features. Inspect the target release, generated code and framework versions first; this skill does not authorize a toolchain upgrade. Start with consumer code: an ordinary creation, a relevant advanced use such as incremental input …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/gof-builder@sha256:3718e40efcc0e970The 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_s5axpxhxysuoialm)
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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 | 11,242 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 10,422 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 10,004 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 9,473 B | A | view · diff |
| git:20260903.f199530 | 2026-09-03 | f199530 | 8,610 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 (11242 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_s5axpxhxysuoialm GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/gof-builder GET https://markdownregistry.com/api/v1/blob/3718e40efcc0e97078e83cd74ca539085fe7a3e831f086eef16476119ac86d6a
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.