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⚡ Performance Engineer Master Kit · dokhacgiakhoa | DecimalAI

devopsby dokhacgiakhoa

⚡ Performance Engineer Master Kit

dokhacgiakhoa/performance-engineer

Source dokhacgiakhoa/agent-skills-4-vibe-coding-cli ↗License NOASSERTION

Expert performance engineer specializing in modern observability.

NewMaintained

Automatic

DevOps & SRE pack

Last verified 8/29/2026

What it changes

Passed 0 of 23 test cases with the skill, and 23 of 23 without it.

Without skill100%

With skill0%

Checks it passed that the model alone missed

Includes the command python .agent/skills/performance-engineer/scripts/lighthouse_check.py http://localhost:3000.
Includes the execution command python .agent/skills/performance-engineer/scripts/lighthouse_check.py http://localhost:3000.

2 fixed17 passed either way2 still failing2 broke

Pass-rate lift: -100 pp
Tokens: +37%
Agent turns: 0%
Response time: +10%

Model gemini-3.6-flashMeasured 8/29/2026v119 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-performance-engineer/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-performance-engineer/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dokhacgiakhoa-performance-engineer, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dokhacgiakhoa-performance-engineer/ and pins it in .decimal/skills.lock

decimalai skills add dokhacgiakhoa-performance-engineer

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-performance-engineer/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-performance-engineer/SKILL.md

Raw file: /s/dokhacgiakhoa-performance-engineer/SKILL.md ↗ · machine-readable summary at /s/dokhacgiakhoa-performance-engineer.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 2

Prompt

Can you help us diagnose and fix our web application's slow loading times and layout instability? Please evaluate http://localhost:3000 and provide a structured plan covering client-side rendering metric targets, bundle reduction strategies, and automated audit execution steps.

What was checked, without and with the skill
Checked	Without skill	With skill
Includes the execution command python .agent/skills/performance-engineer/scripts/lighthouse_check.py http://localhost:3000.	Missed	Passed
Specifies a Largest Contentful Paint target under 2.5 seconds.	Passed	Passed
Specifies a Cumulative Layout Shift target under 0.1.	Passed	Passed

case-01 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md69 lines3 filesincludes scripts

⚡ Performance Engineer Master Kit

You are a Principal Performance Architect and Site Reliability Engineer. Your mission is to eliminate bottlenecks, minimize latency, and ensure systems scale gracefully under load.

1. Core Web Vitals & Frontend Speed

LCP (Largest Contentful Paint): < 2.5s. Optimize images, remove render-blocking resources.
CLS (Cumulative Layout Shift): < 0.1. Set dimensions for media, avoid manual DOM jumps.
INP (Interaction to Next Paint): < 200ms. Break up long tasks, optimize event handlers.
Bundle Optimization:
- Code splitting (Dynamic imports).
- Tree-shaking (ESM imports).
- Minification & Compression (Brotli/Gzip).

2. Backend & Database Optimization

Caching: Multi-tier strategy (Browser -> CDN -> Edge -> Application -> Redis).
Queries: Optimize N+1 issues, implement proper indexing, use Explain Plan.
Async Processing: Offload heavy tasks to background workers (BullMQ, Sidekiq).
Resource Limits: Tune CPU/Memory limits in Kubernetes (VPA/HPA).

3. Modern Observability (OpenTelemetry)

Tracing: Implement distributed tracing across microservices to find path latency.
Metrics: Standardize golden signals: Latency, Traffic, Errors, and Saturation.
Log Correlation: Attach trace IDs to every log entry for unified debugging.

Track record

Benchmark

0 / 23

test cases passed, vs 23 / 23 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dokhacgiakhoa / agent-skills-4-vibe-coding-cli

.agent/skills/performance-engineer/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/10/2026Version v1Bundled 2 files · scripts

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

⚡ Performance Engineer Master Kit

📑 Internal Menu

1. Core Web Vitals & Frontend Speed

2. Backend & Database Optimization

3. Modern Observability (OpenTelemetry)

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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