skill-creator

Guide for creating effective Agent Skills. Use when users want to create a new skill (or update an existing skill) that extends an AI agent's capabilities with specialized knowledge, workflows, or tool integrations. Covers skill structure, YAML frontmatter, trigger configuration, and the 500-line rule.

Quality

85%

Does it follow best practices?

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Adds up to 20 points to the overall score

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Securityby

Passed

No findings from the security scan

Quality

Content

78%Weight 40%Scale 1-5

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

A well-structured, highly actionable skill-creation guide with excellent progressive disclosure and copy-paste-ready commands. The main weakness is mild verbosity in conceptual explanations and a missing error-recovery feedback loop around the destructive skill-rules regeneration step.

Suggestions

Tighten or remove conceptual padding (the 'onboarding guides' analogy and the 'context window is a public good' rationale) since the agent already understands these ideas.

Add an explicit feedback loop to Step 5: 'If validate reports errors, fix them and re-run validate before regenerating skill-rules.json.'

Add a checkpoint before the destructive 'generate-skill-rules' command (e.g. confirm/backup the existing skill-rules.json) to guard against overwriting valid rules.

Dimension	Reasoning	Score
Conciseness	Mostly efficient with concrete code blocks, tables, and commands, but includes unnecessary explanatory padding ('Skills are modular, self-contained packages... Think of them as onboarding guides', the 'context window is a public good' rationale) that an expert agent does not need.	3 / 5
Actionability	Fully executable copy-paste-ready commands (init, validate, generate-skill-rules, the piped-JSON test command), complete frontmatter templates, a field table, and a directory tree cover the common authoring cases.	5 / 5
Workflow Clarity	Clear six-step sequence with an explicit validate step, but the destructive 'generate-skill-rules' overwrite lacks an explicit error-recovery feedback loop and a checkpoint before regenerating.	4 / 5
Progressive Disclosure	Clear overview with a dedicated Reference Files section pointing to four well-signaled one-level-deep references (workflows, output-patterns, patterns-library, troubleshooting), all verified to exist as real bundle files.	5 / 5
	Total	17 / 20 Passed

Description

92%Weight 40%Scale 1-5

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 that explicitly covers both what the skill does and when to use it, with concrete capability coverage and a clear, low-conflict niche. Keyword coverage is good but could add a few more natural synonyms.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete capabilities ('Covers skill structure, YAML frontmatter, trigger configuration, and the 500-line rule') and concrete actions ('create a new skill', 'update an existing skill'), giving comprehensive coverage rather than minor gaps.	5 / 5
Completeness	Explicitly answers both 'what' ('Guide for creating effective Agent Skills... Covers skill structure...') and 'when' ('Use when users want to create a new skill (or update an existing skill)...') with concrete trigger phrases.	5 / 5
Trigger Term Quality	Good natural keyword coverage ('create a new skill', 'update an existing skill', 'skill', 'SKILL.md'), but missing common synonym variations a user might say (e.g. 'how to write a skill', 'skill-rules').	4 / 5
Distinctiveness Conflict Risk	Targets a clear niche (skill authoring/management) with distinct triggers ('SKILL.md', 'skill structure', 'trigger configuration') and minimal overlap risk with other skills.	5 / 5
	Total	19 / 20 Passed

Validation

75%

Warnings & errors only

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

Validation — 12 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning
metadata_field	'metadata' should map string keys to string values	Warning
relative_links	Relative link issues: 2 missing	Warning
referenced_paths_exist	Referenced path issues: 10 missing	Warning

	Total	12 / 16 Passed

Repository: hashintel/hash
Path: .claude/skills/skill-creator/SKILL.md
Commit: 0144f9c

Reviewed: 1 day ago

Table of Contents

Discovery Implementation Validation

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