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testland/timecop-ruby

Wraps timecop (github.com/travisjeffery/timecop), the Ruby time-mocking gem: Timecop.freeze, Timecop.travel, Timecop.scale (time-speedup), Timecop.return (cleanup), and RSpec-friendly helpers. Use when testing Ruby/Rails code that calls Time / Date / DateTime.

77

Quality

97%

Does it follow best practices?

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Overview
Quality
Evals
Security
Files

Quality

Content

92%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, actionable reference with executable code and strong cleanup guidance; the only weak spot is progressive disclosure, since everything is inline with no bundle files to delegate detail to.

Suggestions

Consider moving the cross-language/companion-catalog list and the detailed API behavior into a references file (e.g. references/timecop-methods.md) so SKILL.md stays a concise overview that links one level deep.

If keeping everything inline is intentional, trim the cross-language catalog list (freezegun-python, mockclock-jvm, etc.) to only the most relevant companions, as it is tangential to a Ruby-specific skill.

Add a one-line 'How this skill is organized' note at the top so readers know the sections are self-contained scenarios rather than a multi-step workflow.

DimensionReasoningScore

Conciseness

The body is lean and code-heavy — sections like freeze/travel/scale/manual control are almost entirely executable Ruby with only brief, useful distinctions ('freeze pauses; travel keeps the clock ticking'); no padding explaining basic concepts.

3 / 3

Actionability

Fully executable, copy-paste-ready examples: Gemfile snippet, 'bundle exec rspec', Timecop.freeze blocks, RSpec after-each hook, and a GitHub Actions YAML job — concrete commands and code throughout.

3 / 3

Workflow Clarity

A single-purpose reference skill organized by scenario with explicit cleanup guidance — 'Use ensure blocks to guarantee cleanup', 'config.after(:each) { Timecop.return }', plus an anti-patterns table addressing cross-test contamination — so the risky cleanup path is well covered.

3 / 3

Progressive Disclosure

No bundle files exist (references/scripts/assets absent), so all ~180 lines live inline in SKILL.md; sections are well-organized but there is no file-level split and the under-50-line exception does not apply, leaving it a structured monolith rather than a navigable overview pointing to detail files.

2 / 3

Total

11

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12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description: specific API actions, natural trigger terms, explicit 'Use when' guidance, and a clear Ruby time-mocking niche with low conflict risk.

DimensionReasoningScore

Specificity

Lists multiple concrete actions: 'Timecop.freeze, Timecop.travel, Timecop.scale (time-speedup), Timecop.return (cleanup), and RSpec-friendly helpers' — names specific API methods rather than vague capabilities.

3 / 3

Completeness

Explicitly answers both what ('Wraps timecop... the Ruby time-mocking gem: ...') and when ('Use when testing Ruby/Rails code that calls Time / Date / DateTime').

3 / 3

Trigger Term Quality

Natural user-facing terms are present: 'testing Ruby/Rails code that calls Time / Date / DateTime' — exactly what a developer would say when they need time mocking.

3 / 3

Distinctiveness Conflict Risk

Clearly scoped to the Ruby timecop gem with distinct Time/Date/DateTime triggers, unlikely to fire for unrelated skills.

3 / 3

Total

12

/

12

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Reviewed

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