jbvc/skill-developer
Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger patterns, working with hooks, debugging skill activation, or implementing progressive disclosure. Covers skill structure, YAML frontmatter, trigger types (keywords, intent patterns, file paths, content patterns), enforcement levels (block, suggest, warn), hook mechanisms (UserPromptSubmit, PreToolUse), session tracking, and the 500-line rule.
77
77%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
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.
This is an excellent skill description that clearly defines its scope (Claude Code skill creation and management), provides explicit trigger guidance via a 'Use when' clause, and includes highly specific technical terms that serve as strong discriminators. The description is comprehensive without being padded, covering both high-level actions and specific technical concepts that users would naturally reference.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions and concepts: creating skills, modifying skill-rules.json, debugging skill activation, implementing progressive disclosure, YAML frontmatter, trigger types, enforcement levels, hook mechanisms, session tracking, and the 500-line rule. | 3 / 3 |
Completeness | Clearly answers both 'what' (create and manage Claude Code skills, covers skill structure, YAML frontmatter, trigger types, enforcement levels, etc.) and 'when' (explicit 'Use when' clause listing creating new skills, modifying skill-rules.json, debugging skill activation, etc.). | 3 / 3 |
Trigger Term Quality | Includes many natural keywords a user would say: 'skills', 'skill-rules.json', 'hooks', 'trigger patterns', 'YAML frontmatter', 'UserPromptSubmit', 'PreToolUse', 'progressive disclosure', '500-line rule'. These cover both high-level concepts and specific technical terms users would reference. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive niche focused specifically on Claude Code skill authoring and management. Terms like 'skill-rules.json', 'trigger patterns', 'enforcement levels', 'UserPromptSubmit', 'PreToolUse', and '500-line rule' are very specific to this domain and unlikely to conflict with other skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
42%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The skill demonstrates excellent progressive disclosure and reasonable structure, but suffers significantly from verbosity and redundancy—the Quick Reference Summary essentially duplicates the main content, and many sections explain concepts Claude already understands. Actionability is moderate with some executable commands but lacks a complete worked example. The workflow has clear steps but missing validation criteria.
Suggestions
Eliminate the 'Quick Reference Summary' section entirely—it duplicates the main content and wastes ~80 lines of token budget. The main sections already cover this material.
Remove the 'When to Use This Skill' section (trigger keywords belong in YAML frontmatter description, not body), the 'Skill Status' footer, and explanatory text about what hooks/enforcement levels conceptually are—focus on how to use them.
Add a complete, concrete end-to-end example: create a specific real skill (e.g., 'docker-compose-editing') showing the exact SKILL.md content, exact skill-rules.json entry, exact test commands with expected output, demonstrating success and failure cases.
Add explicit validation criteria to the workflow steps—e.g., after 'Test Triggers', show what successful output looks like vs. failed output, so Claude knows when to proceed vs. iterate.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is extremely verbose at ~350+ lines, with significant redundancy. The 'Quick Reference Summary' at the end repeats nearly everything already covered. It explains concepts Claude already knows (what enforcement levels mean, what hooks are), includes unnecessary meta-commentary ('Philosophy Change (2025-10-27)'), and the 'When to Use This Skill' section listing trigger words is wasted tokens since that belongs in frontmatter description. | 1 / 3 |
Actionability | There are some concrete, executable commands (the npx tsx test commands, the JSON template for skill-rules.json, the SKILL.md template), but much of the content is descriptive rather than instructive. The skill-rules.json template is incomplete (missing required fields?), and the SKILL.md template is generic pseudocode rather than a real worked example. No complete end-to-end example of creating a specific skill. | 2 / 3 |
Workflow Clarity | The 5-step creation process is clearly sequenced and the testing checklist is thorough. However, there are no validation checkpoints or feedback loops within the steps—Step 3 says 'Test Triggers' but doesn't explain what success/failure looks like. Step 4 says 'Refine Patterns' without concrete criteria for when patterns are good enough. The checklist at the end partially compensates but lacks explicit pass/fail criteria. | 2 / 3 |
Progressive Disclosure | Excellent progressive disclosure with a clear overview in the main file and well-signaled one-level-deep references to 6 specific reference files (TRIGGER_TYPES.md, SKILL_RULES_REFERENCE.md, HOOK_MECHANISMS.md, TROUBLESHOOTING.md, PATTERNS_LIBRARY.md, ADVANCED.md), each with a brief description of what it contains. | 3 / 3 |
Total | 8 / 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.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
Reviewed
Table of Contents