aggregation-helper
Aggregation Helper - Auto-activating skill for Data Analytics. Triggers on: aggregation helper, aggregation helper Part of the Data Analytics skill category.
33
0%
Does it follow best practices?
Impact
97%
1.02xAverage 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/aggregation-helper/SKILL.mdQuality
Discovery
0%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 essentially a placeholder with no substantive content. It names a category ('Data Analytics') and a label ('Aggregation Helper') but provides zero concrete actions, no natural trigger terms, and no guidance on when Claude should select this skill. It would be nearly impossible for Claude to correctly choose this skill from a pool of alternatives.
Suggestions
Add specific concrete actions the skill performs, e.g., 'Computes sums, averages, counts, and group-by aggregations on tabular datasets.'
Add an explicit 'Use when...' clause with natural trigger terms, e.g., 'Use when the user asks to summarize, aggregate, group, pivot, or roll up data, or mentions terms like sum, average, count, or group by.'
Remove the duplicate trigger term ('aggregation helper' listed twice) and replace with varied natural language terms users would actually say, such as 'aggregate', 'summarize data', 'totals', 'group by column'.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description says 'Aggregation Helper' and 'Data Analytics' but provides no concrete actions. There is no indication of what specific tasks it performs—no verbs like 'computes', 'summarizes', 'groups', etc. | 1 / 3 |
Completeness | The description fails to answer 'what does this do' beyond a vague label and completely lacks a 'when should Claude use it' clause. There is no explicit trigger guidance. | 1 / 3 |
Trigger Term Quality | The only trigger terms listed are 'aggregation helper' repeated twice, which is not a natural phrase a user would say. Missing natural terms like 'sum', 'group by', 'average', 'aggregate data', 'pivot', 'rollup', etc. | 1 / 3 |
Distinctiveness Conflict Risk | The description is extremely generic—'Data Analytics' could overlap with countless other skills, and 'Aggregation Helper' without specifics doesn't carve out a clear niche. | 1 / 3 |
Total | 4 / 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 substantive content. It contains only generic boilerplate that could apply to any topic—there are no concrete aggregation examples (e.g., GROUP BY patterns, window functions, ROLLUP/CUBE), no executable code, no workflows, and no references to supporting materials. It provides zero value beyond what the skill's title alone conveys.
Suggestions
Add concrete, executable SQL examples for common aggregation patterns (GROUP BY, HAVING, window functions, ROLLUP/CUBE) with sample input and expected output.
Define a clear workflow for building aggregation queries: e.g., 1) identify dimensions and measures, 2) write the query, 3) validate results with a COUNT/SUM sanity check, 4) optimize with indexes or materialized views.
Remove all boilerplate sections ('When to Use', 'Example Triggers', 'Capabilities') that describe the skill meta-information rather than teaching actionable techniques.
Include specific guidance on common pitfalls (e.g., aggregating over joins causing row duplication, NULL handling in GROUP BY, performance considerations for large datasets).
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is entirely filler and boilerplate. It explains nothing Claude doesn't already know, provides no domain-specific information, and every section restates the same vague concept ('aggregation helper') without adding substance. | 1 / 3 |
Actionability | There is zero concrete guidance—no SQL examples, no code snippets, no specific commands, no aggregation patterns. The skill describes rather than instructs, offering only vague promises like 'provides step-by-step guidance' without actually providing any. | 1 / 3 |
Workflow Clarity | No workflow, steps, or process is defined. There are no sequences, no validation checkpoints, and no actual procedure for performing any aggregation task. | 1 / 3 |
Progressive Disclosure | The content is a monolithic block of placeholder text with no references to supporting files, no structured navigation, and no meaningful organization of content across levels of detail. | 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
3a2d27d
- Reviewed
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