161-java-profiling-detect

Use when you need to set up Java application profiling to detect and measure performance issues — including automated async-profiler v4.0 setup, problem-driven profiling (CPU, memory, threading, GC, I/O), interactive profiling scripts, JFR integration with Java 25 (JEP 518, JEP 520), or collecting profiling data with flamegraphs and JFR recordings. Part of the skills-for-java project

Quality

67%

Does it follow best practices?

Impact

Pending

No eval scenarios have been run

Securityby

Advisory

Suggest reviewing before use

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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 a strong skill description that clearly articulates what the skill does (Java profiling setup and performance measurement) and when to use it. It includes specific tools (async-profiler v4.0, JFR), concrete profiling domains (CPU, memory, threading, GC, I/O), and output formats (flamegraphs, JFR recordings). The description uses proper third-person voice and provides excellent trigger term coverage for Java developers.

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions: 'automated async-profiler v4.0 setup', 'problem-driven profiling (CPU, memory, threading, GC, I/O)', 'interactive profiling scripts', 'JFR integration with Java 25', 'collecting profiling data with flamegraphs and JFR recordings'.	3 / 3
Completeness	Explicitly answers both what (setup profiling, detect performance issues, various profiling types) AND when ('Use when you need to set up Java application profiling to detect and measure performance issues'). The 'Use when' clause is present and clear.	3 / 3
Trigger Term Quality	Excellent coverage of natural terms users would say: 'Java', 'profiling', 'performance issues', 'async-profiler', 'CPU', 'memory', 'threading', 'GC', 'I/O', 'flamegraphs', 'JFR'. These are terms developers naturally use when discussing Java performance.	3 / 3
Distinctiveness Conflict Risk	Highly distinctive with clear niche: Java profiling specifically with async-profiler v4.0, JFR, Java 25 JEPs. The specific tool versions and Java-specific terminology make it unlikely to conflict with general debugging or other language profiling skills.	3 / 3
	Total	12 / 12 Passed

Implementation

35%

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

This skill functions primarily as a table of contents pointing to a reference file rather than providing actionable guidance itself. While it correctly identifies what profiling covers and when to use it, the complete absence of executable code or concrete commands in the body undermines its utility. The skill would benefit from including at least the basic setup commands and one example script inline.

Suggestions

Include the actual bash script template or at minimum the core profiling commands directly in the skill body rather than deferring everything to the reference file

Add a numbered workflow with explicit steps: 1) Create directories, 2) Download async-profiler, 3) Set JVM flags, 4) Run profiling script, with validation checkpoints

Provide at least one concrete, copy-paste ready example command (e.g., the chmod command, directory creation, or a sample profiler invocation)

Remove redundancy between the description paragraph and the 'What is covered' bullet list

Dimension	Reasoning	Score
Conciseness	The skill is reasonably efficient but includes some redundancy between the description and the 'What is covered' section. The bullet points are helpful but could be tighter.	2 / 3
Actionability	Despite mentioning 'exact bash script templates' multiple times, no actual code or commands are provided in the skill body. All concrete guidance is deferred to the reference file, making this skill abstract rather than executable.	1 / 3
Workflow Clarity	The skill mentions steps (create directories, make scripts executable, verify processes) but lacks clear sequencing and explicit validation checkpoints. The workflow is implied rather than explicitly structured.	2 / 3
Progressive Disclosure	There is a clear reference to a detailed file, but the skill body itself provides almost no actionable content - it's essentially just a pointer to the reference file with some context. The balance between overview and reference is off.	2 / 3
	Total	7 / 12 Passed

Validation

100%

Warnings & errors only

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.

Repository: jabrena/cursor-rules-java
Commit: 7772a1b

Reviewed: 4 days ago

Table of Contents

Discovery Implementation Validation

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