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workers-performance

Cloudflare Workers performance optimization with CPU, memory, caching, bundle size. Use for slow workers, high latency, cold starts, or encountering CPU limits, memory issues, timeout errors.

Install with Tessl CLI

npx tessl i github:secondsky/claude-skills --skill workers-performance
What are skills?

Overall
score

92%

Does it follow best practices?

Validation for skill structure

SKILL.md
Review
Evals

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 a well-crafted skill description that excels across all dimensions. It clearly identifies the specific platform (Cloudflare Workers), the optimization domains (CPU, memory, caching, bundle size), and provides explicit trigger conditions using natural language that users would actually use when experiencing performance problems. The description is concise yet comprehensive.

DimensionReasoningScore

Specificity

Lists multiple specific concrete optimization areas: 'CPU, memory, caching, bundle size' - these are distinct, actionable domains rather than vague language.

3 / 3

Completeness

Clearly answers both what ('Cloudflare Workers performance optimization with CPU, memory, caching, bundle size') and when ('Use for slow workers, high latency, cold starts, or encountering CPU limits, memory issues, timeout errors').

3 / 3

Trigger Term Quality

Excellent coverage of natural terms users would say: 'slow workers', 'high latency', 'cold starts', 'CPU limits', 'memory issues', 'timeout errors' - these match real user problem descriptions.

3 / 3

Distinctiveness Conflict Risk

Highly specific niche targeting Cloudflare Workers performance specifically, with distinct triggers like 'cold starts', 'CPU limits' that wouldn't overlap with general coding or other cloud platform skills.

3 / 3

Total

12

/

12

Passed

Implementation

87%

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

This is a well-crafted performance optimization skill that delivers dense, actionable content efficiently. The code examples are executable and the organization allows quick navigation to specific optimization areas. The main weakness is the lack of explicit validation workflows to verify optimizations are effective.

Suggestions

Add a validation workflow showing how to measure performance before/after optimizations (e.g., 'Run benchmark.sh, apply fix, re-run benchmark.sh, verify CPU time decreased')

Include explicit checkpoints in the profiling section showing how to interpret timing results and decide if further optimization is needed

DimensionReasoningScore

Conciseness

The content is lean and efficient, presenting code examples without explaining basic concepts Claude already knows. Every section delivers actionable information without padding or unnecessary context.

3 / 3

Actionability

Provides fully executable TypeScript code examples throughout, with clear good/bad comparisons. The code is copy-paste ready with specific patterns for streaming, caching, batch processing, and profiling.

3 / 3

Workflow Clarity

While individual techniques are clear, the skill lacks explicit validation checkpoints or feedback loops for optimization workflows. The 'Top 10 Performance Errors' table provides symptom-fix mapping but no verification steps to confirm fixes worked.

2 / 3

Progressive Disclosure

Excellent structure with a quick wins section upfront, detailed sections for specific concerns, and clear one-level-deep references to specific reference files, templates, and scripts organized by use case.

3 / 3

Total

11

/

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.

Validation13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

description_trigger_hint

Description may be missing an explicit 'when to use' trigger hint (e.g., 'Use when...')

Warning

metadata_version

'metadata' field is not a dictionary

Warning

license_field

'license' field is missing

Warning

Total

13

/

16

Passed

Reviewed

Table of Contents

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If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.