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top-cost-drivers

Use when identifying where cloud spend is concentrated — which services, accounts, teams, or regions are driving the most cost — to prioritize optimization efforts

65

Quality

78%

Does it follow best practices?

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SecuritybySnyk

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tessl review fix ./plugins/cost-analyst/skills/top-cost-drivers/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

72%Weight 40%Scale 1-3

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

Highly actionable with concrete executable queries and clear sequencing, but it is verbose due to repetitive code blocks and overlapping guidance sections, and lacks explicit validation checkpoints in the workflow.

Suggestions

Collapse the repeated per-dimension get_cost_data blocks into one parameterized example plus a table of group_by values to remove redundancy.

Merge or trim the overlapping Best Practices, Tips for Effective Analysis, Common Analysis Patterns, and Advanced Techniques sections, which restate the same guidance.

Add an explicit validation step (e.g. reconcile per-dimension totals against the overall total, handle empty/missing dimensions) with a feedback loop before producing the output tables.

DimensionReasoningScore

Conciseness

The body repeats near-identical get_cost_data blocks across four primary dimensions and four multi-dimensional breakdowns (only group_by varies), and the Best Practices, Tips, Common Patterns, and Advanced Techniques sections restate overlapping guidance, so it could be materially tightened.

2 / 3

Actionability

Dozens of concrete, executable get_cost_data calls with real FQDIDs (CZ:Service, CZ:Account, User:Defined:Team, CZ:Tag:Environment) and specific parameters are copy-paste ready.

3 / 3

Workflow Clarity

Steps 1–7 are clearly sequenced and the "All Math In Code" rule is a useful correctness check, but there are no explicit validation/error-recovery checkpoints (e.g. empty results, missing dimensions, totals not reconciling across breakdowns).

2 / 3

Progressive Disclosure

The body is well-sectioned and offloads detailed reference material to clearly signaled one-level-deep files in the See Also block (best-practices, tools reference, error-handling, dimensions, cost-types).

3 / 3

Total

10

/

12

Passed

Description

85%Weight 40%Scale 1-3

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, third-person description with an explicit trigger and concrete scope; its main weakness is trigger phrasing that is more formal than the words users naturally say.

Suggestions

Add natural user-facing trigger terms (e.g. "biggest costs", "top spend", "most expensive services") to the description so it matches how users actually phrase the request.

Consider naming the ranking/contribution-percentage action explicitly ("ranks and quantifies contribution") to sharpen the capability statement.

DimensionReasoningScore

Specificity

Names the cloud-spend domain plus multiple concrete dimensions ("services, accounts, teams, or regions") and concrete actions (identifying concentration, prioritizing optimization), matching the multi-action anchor.

3 / 3

Completeness

An explicit "Use when..." clause supplies the trigger and the body of the sentence states what the skill does (identify/rank cost drivers and prioritize optimization), answering both what and when.

3 / 3

Trigger Term Quality

Phrasing is formal ("identifying where cloud spend is concentrated") and omits the natural terms users actually say ("biggest costs", "top spend", "most expensive"), so coverage of common variations is incomplete.

2 / 3

Distinctiveness Conflict Risk

The cloud-cost-driver framing with specific dimensions carves a clear niche unlikely to fire for unrelated skills.

3 / 3

Total

11

/

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
Cloudzero/cloudzero-claude-marketplace
Reviewed

Table of Contents

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