performance-optimization

performance-optimization is a skill for Claude Code, Codex from pvillega/claude-templates. It costs 97 tokens per session (938 once invoked), scanned A, original, no licence file.

A guide for finding and fixing slow backend services, APIs, databases, and other system components.

In plain words
What is it for?
Use it when investigating API latency, tuning queries, improving throughput, or diagnosing slow server responses.
Why use it?
It helps separate likely causes of slow response times, overloaded systems, and inefficient database queries instead of applying caching without checking the underlying problem.

Skill for Claude CodeCodex

Part of the ct plugin — 38 skills, 7 agents, 7 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/pvillega/claude-templates/performance-optimization
Any agent
npx skills add pvillega/claude-templates --skill performance-optimization
Clone the repo
git clone --depth 1 https://github.com/pvillega/claude-templates

Made for: Claude Code, Codex.

Or install ct, the plugin that ships this one along with the rest of its 38 skills, 7 agents, 7 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for performance-optimization

README.md
[![agentmods](https://agentmods.dev/badge/skills/pvillega/claude-templates/performance-optimization.svg)](https://agentmods.dev/skills/pvillega/claude-templates/performance-optimization)
Your own site
<a href="https://agentmods.dev/skills/pvillega/claude-templates/performance-optimization"><img src="https://agentmods.dev/badge/skills/pvillega/claude-templates/performance-optimization.svg" alt="Measured on agentmods" height="20"></a>
Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 938 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00097 $0.00938
Opus 5 $0.00048 $0.00469
Sonnet 5 $0.00019 $0.00188
Haiku 4.5 $0.00010 $0.00094

Measured 4d ago against content hash 9c19d5038414, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

performance-optimization scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Record **tool + metric + value + conditions** (e.g., "k6 load test: p95 = 4.2s at 100 req/s, dataset: 10k rows"). Must be reproducible — `curl` wall-clock time is NOT a baseline. Use load testing tools (k6, wrk, vegeta)
plugins/ct/skills/performance-optimization/SKILL.md · 93 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 93 lines · 97 tokens per session scan A 9c19d5038414

Subscribe to this mod's changes

performance-optimization is a skill published in the GitHub repository pvillega/claude-templates (23 stars, last pushed 1mo ago), with no licence file. It adds 97 tokens to every session and 938 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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