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timeline-builder

Generate beautiful interactive timeline HTML pages from JSON data, with vertical, horizontal, or dual-side layouts, collapsible details, and custom colors. Ideal for project milestones, company histories, or resumes. Triggered when a user mentions 'timeline', 'history of events', 'project milestones', 'release log', or asks to visualize a chronological sequence of data.

79

Quality

100%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

100%

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

A well-structured, actionable skill body that uses tables and executable commands efficiently, keeps implementation in the bundled script, and documents a clear single-step workflow. It avoids teaching concepts Claude already knows and stays lean throughout.

DimensionReasoningScore

Conciseness

The body is dominated by token-efficient tables and code blocks with no concept explanations Claude already knows; the brief 'Use Cases' list adds scenarios rather than padding, matching the lean anchor rather than the explanatory-fluff of level 2.

3 / 3

Actionability

Provides fully executable bash commands ('python3 scripts/generate_timeline.py --config timeline_data.json --output timeline.html'), a complete JSON config example, and CLI/event-field tables that are copy-paste ready.

3 / 3

Workflow Clarity

This is a simple single-action skill (provide JSON config, run script, receive HTML) that is not destructive or batch, so the validation-cap rule does not apply; the single action is unambiguous and clearly shown with multiple invocation variants.

3 / 3

Progressive Disclosure

SKILL.md serves as a clear overview/usage guide while the implementation is appropriately split into the one-level-deep bundled script at scripts/generate_timeline.py (a real file referenced via executable commands), with well-organized sections for easy navigation.

3 / 3

Total

12

/

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, specific description that states concrete capabilities, includes natural trigger terms, and explicitly signals when to use the skill. The mild buzzword 'beautiful' is the only minor fluff and does not undermine the concrete action list.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'Generate beautiful interactive timeline HTML pages from JSON data, with vertical, horizontal, or dual-side layouts, collapsible details, and custom colors' — matching the anchor for several specific actions rather than the partial coverage of level 2.

3 / 3

Completeness

Explicitly answers both what ('Generate...timeline HTML pages from JSON data...') and when ('Triggered when a user mentions...'), satisfying the explicit-trigger requirement so the level-2 cap does not apply.

3 / 3

Trigger Term Quality

Provides natural terms a user would actually say: 'timeline', 'history of events', 'project milestones', 'release log', and 'visualize a chronological sequence of data', giving good coverage rather than the partial set at level 2.

3 / 3

Distinctiveness Conflict Risk

Occupies a clear niche (interactive timeline HTML generation) with distinct triggers, making conflict with other skills unlikely; voice is third person with no first/second-person penalty.

3 / 3

Total

12

/

12

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository
zebbern/claude-code-guide
Reviewed

Table of Contents

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