complex-join-helper
Complex Join Helper - Auto-activating skill for Data Analytics. Triggers on: complex join helper, complex join helper Part of the Data Analytics skill category.
36
Quality
3%
Does it follow best practices?
Impact
100%
1.00xAverage score across 3 eval scenarios
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./planned-skills/generated/12-data-analytics/complex-join-helper/SKILL.mdQuality
Discovery
7%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 description is severely underdeveloped and essentially non-functional for skill selection. It provides no concrete actions, no natural trigger terms users would actually say, and no guidance on when to use it. The skill name 'Complex Join Helper' is repeated as the only trigger, which is circular and unhelpful.
Suggestions
Add specific actions the skill performs, e.g., 'Constructs multi-table SQL joins, optimizes JOIN syntax, debugs join conditions, and explains join types (INNER, LEFT, RIGHT, FULL, CROSS)'
Add a 'Use when...' clause with natural trigger terms like 'SQL joins', 'joining tables', 'LEFT JOIN', 'multiple tables', 'database relationships', 'foreign keys'
Include file types or contexts where this applies, e.g., 'Use when writing SQL queries that combine data from multiple tables or when debugging join-related query errors'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description only says 'Complex Join Helper' without describing any concrete actions. It doesn't explain what the skill actually does - no verbs describing capabilities like 'generates', 'analyzes', or 'constructs'. | 1 / 3 |
Completeness | The description fails to answer both 'what does this do' and 'when should Claude use it'. There's no explanation of capabilities and no 'Use when...' clause with explicit triggers. | 1 / 3 |
Trigger Term Quality | The trigger terms are just 'complex join helper' repeated twice, which is not natural language users would say. Missing natural terms like 'SQL joins', 'multiple tables', 'LEFT JOIN', 'database query', etc. | 1 / 3 |
Distinctiveness Conflict Risk | While 'complex join' hints at a specific domain (SQL/database joins), the lack of detail means it could overlap with general SQL skills or database query skills. The category 'Data Analytics' is too broad to provide clear distinction. | 2 / 3 |
Total | 5 / 12 Passed |
Implementation
0%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This skill is an empty template with no actual content. It describes what a complex join helper skill would do without providing any SQL examples, join patterns, validation steps, or actionable guidance. The entire content is meta-description rather than instruction.
Suggestions
Add concrete SQL examples showing complex join patterns (multi-table joins, self-joins, anti-joins, etc.) with executable code
Include a workflow for analyzing join requirements: identify tables → determine join keys → validate cardinality → write and test query
Provide specific guidance on common pitfalls (Cartesian products, NULL handling in joins, performance considerations) with examples
Remove all meta-description sections ('When to Use', 'Capabilities', 'Example Triggers') and replace with actual technical content
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is entirely boilerplate with no actual technical substance. It explains what the skill does in abstract terms without providing any concrete information Claude doesn't already know. | 1 / 3 |
Actionability | No concrete code, commands, SQL examples, or executable guidance is provided. The content only describes capabilities in vague terms like 'provides step-by-step guidance' without actually providing any guidance. | 1 / 3 |
Workflow Clarity | No workflow, steps, or process is defined. The skill claims to provide 'step-by-step guidance' but contains zero actual steps for performing complex joins or any data analytics task. | 1 / 3 |
Progressive Disclosure | No references to external files, no structured content organization, and no actual technical content to organize. The sections are just meta-descriptions of what the skill supposedly does. | 1 / 3 |
Total | 4 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
allowed_tools_field | 'allowed-tools' contains unusual tool name(s) | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 9 / 11 Passed | |
- Commit
0c08951
- Reviewed
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