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calendar-calculation-method

Use when calculating calendars, determining seasonal timing, or establishing the correct 正朔. Covers leap month intercalation using the 19-year Metonic cycle, solstice measurement via shadow length (晷景), and dynastic calendar differences.

75

Quality

92%

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SecuritybySnyk

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SKILL.md
Quality
Evals
Security

Quality

Content

85%

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

The body is concise, clearly sequenced with validation, and well-organized for a simple skill. Its main weakness is actionability: several procedural steps are abstract and lack a concrete computational method.

Suggestions

Add a concrete worked example of the leap-month calculation (e.g., show how the 7 intercalary months are placed across a sample 19-year cycle) so the intercalation step is executable rather than descriptive.

Replace abstract steps like 'Adjust calculations as needed' and 'Observe sun's position against stars' with specific, measurable procedures or thresholds for when and how to adjust.

Specify the shadow-length measurement concretely (e.g., instrument, unit, and the solstice-detection threshold) instead of only naming 晷景.

DimensionReasoningScore

Conciseness

The body is lean — terse bullets and minimal prose that assume Claude's competence without explaining known concepts — so every token largely earns its place; it is not reduced to 2 because there is no padding or unnecessary exposition.

3 / 3

Actionability

Some concrete guidance exists ('19 years = 235 lunar months', 'Insert 7 leap months in 19-year cycle', 'Measure shadow length (晷景)'), but several steps stay abstract ('Adjust calculations as needed', 'Observe sun's position against stars', 'Document all anomalies') without a concrete computational method, matching the incomplete-guidance anchor rather than copy-paste-ready.

2 / 3

Workflow Clarity

A clear 4-step sequence (base point → celestial movement → intercalation → verify/adjust) is paired with an explicit 3-item Validation checklist and a compare-with-observations feedback step, matching the clear-sequence-with-validation anchor.

3 / 3

Progressive Disclosure

The skill is a single-purpose, under-50-line document with well-organized sections and no external references needed, which the rubric allows to score 3 for simple well-structured skills.

3 / 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.

The description is strong: it states concrete capabilities, includes explicit 'Use when...' triggers, answers both what and when, and occupies a clearly distinct niche. No significant weaknesses to address.

DimensionReasoningScore

Specificity

Lists several concrete actions — 'leap month intercalation using the 19-year Metonic cycle', 'solstice measurement via shadow length (晷景)', 'dynastic calendar differences', and 'establishing the correct 正朔' — matching the multi-specific-action anchor rather than the partial score-2 example.

3 / 3

Completeness

Explicitly answers both 'what' ('Covers leap month intercalation... solstice measurement... dynastic calendar differences') and 'when' ('Use when calculating calendars, determining seasonal timing, or establishing the correct 正朔'), satisfying the explicit-trigger anchor.

3 / 3

Trigger Term Quality

Natural triggers like 'calculating calendars', 'determining seasonal timing', and 'establishing the correct 正朔' cover what a user with this need would say, alongside domain terms (Metonic cycle, leap month, solstice); not reduced to 2 because coverage is broad rather than missing common variations.

3 / 3

Distinctiveness Conflict Risk

The niche is highly specific (正朔, Metonic cycle, 晷景 shadow measurement) with distinct triggers, making overlap with other skills unlikely.

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.

Repository
baojie/shiji-kb
Reviewed

Table of Contents

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