Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add pproenca/dot-skills --skill ruby-refactorgit clone --depth 1 https://github.com/pproenca/dot-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/pproenca/dot-skills/ruby-refactor)<a href="https://agentmods.dev/skills/pproenca/dot-skills/ruby-refactor"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/ruby-refactor.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00065 | $0.01751 |
| Opus 5 | $0.00032 | $0.00875 |
| Sonnet 5 | $0.00013 | $0.00350 |
| Haiku 4.5 | $0.00006 | $0.00175 |
Grade A, and why
ruby-refactor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Community Ruby Refactoring Best Practices
Comprehensive refactoring guide for Ruby applications, maintained by the community. Contains 45 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.
When to Apply
Reference these guidelines when:
- Refactoring Ruby code to reduce complexity and improve design
- Extracting methods, classes, or value objects from large units
- Simplifying complex conditionals and deep nesting
- Reducing coupling between classes and modules
- Adopting idiomatic Ruby patterns and modern Ruby 3.x features
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Structure & Decomposition | CRITICAL | struct- |
| 2 | Conditional Simplification | CRITICAL | cond- |
| 3 | Coupling & Dependencies | HIGH | couple- |
| 4 | Ruby Idioms | HIGH | idiom- |
| 5 | Data & Value Objects | MEDIUM-HIGH | data- |
| 6 | Design Patterns | MEDIUM | pattern- |
| 7 | Modern Ruby 3.x | MEDIUM | modern- |
| 8 | Naming & Readability | LOW-MEDIUM | name- |
Quick Reference
1. Structure & Decomposition (CRITICAL)
struct-extract-method- Extract Long Methods into Focused Unitsstruct-extract-class- Extract Class for Single Responsibilitystruct-parameter-object- Introduce Parameter Object for Long Signaturesstruct-compose-method- Compose Methods at Single Abstraction Levelstruct-replace-method-with-object- Replace Complex Method with Method Objectstruct-single-responsibility- One Reason to Change per Classstruct-flatten-deep-nesting- Flatten Deep Nesting with Early Extraction
2. Conditional Simplification (CRITICAL)
What ships with it
50 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 9.0 KB
- assets/templates/_template.md 590 B
- metadata.json 1.1 KB
- README.md 4.5 KB
- references/_sections.md 2.0 KB
- references/cond-consolidate-duplicates.md 2.2 KB
- references/cond-decompose-conditional.md 1.7 KB
- references/cond-guard-clauses.md 1.9 KB
- references/cond-null-object.md 1.9 KB
- references/cond-pattern-matching.md 2.2 KB
- references/cond-replace-with-polymorphism.md 2.6 KB
- references/couple-avoid-class-methods-domain.md 1.8 KB
- references/couple-composition-over-inheritance.md 2.0 KB
- references/couple-dependency-injection.md 1.5 KB
- references/couple-feature-envy.md 1.5 KB
- references/couple-law-of-demeter.md 1.6 KB
- references/couple-tell-dont-ask.md 1.4 KB
- references/data-define-immutable.md 2.1 KB
- references/data-encapsulate-collection.md 1.9 KB
- references/data-replace-data-clump.md 2.3 KB
- references/data-separate-query-command.md 2.0 KB
- references/data-value-object.md 2.3 KB
- references/idiom-block-yield.md 1.5 KB
- references/idiom-duck-typing.md 1.7 KB
- references/idiom-implicit-return.md 1.8 KB
- references/idiom-keyword-arguments.md 1.3 KB
- references/idiom-predicate-methods.md 1.3 KB
- references/idiom-prefer-enumerable.md 1.5 KB
- references/idiom-respond-to-missing.md 1.8 KB
- references/modern-deconstruct-keys.md 2.2 KB
- references/modern-endless-methods.md 1.6 KB
- references/modern-hash-pattern-guard.md 2.1 KB
- references/modern-pattern-matching.md 1.8 KB
- references/modern-rightward-assignment.md 2.0 KB
- references/name-avoid-abbreviations.md 2.1 KB
- references/name-consistent-vocabulary.md 1.8 KB
- references/name-intention-revealing.md 1.6 KB
- references/name-rename-to-remove-comments.md 1.5 KB
- references/pattern-decorator.md 2.2 KB
- references/pattern-factory.md 1.8 KB
- references/pattern-null-object-protocol.md 2.1 KB
- references/pattern-strategy.md 2.2 KB
- references/pattern-template-method.md 2.6 KB
- references/struct-compose-method.md 3.0 KB
- references/struct-extract-class.md 2.1 KB
- references/struct-extract-method.md 3.1 KB
- references/struct-flatten-deep-nesting.md 2.9 KB
- references/struct-parameter-object.md 3.1 KB
- references/struct-replace-method-with-object.md 3.2 KB
- references/struct-single-responsibility.md 2.6 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 117 lines · 65 tokens per session scan A 5937bcf56b1e
ruby-refactor is a skill published in the GitHub repository pproenca/dot-skills (203 stars, last pushed 23d ago), licensed MIT. It adds 65 tokens to every session and 1,751 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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