performance-optimizer

A coding assistant for finding and fixing slow parts of websites and software. It covers profiling, which measures where a program spends time and memory, website speed checks, and reducing the size of files sent to users.

In plain words
What is it for?
Use it to improve runtime speed, reduce JavaScript bundle size, check Core Web Vitals, and investigate results from benchmarks or Lighthouse.
Why use it?
It helps locate the causes of slow pages, high memory or CPU use, and large downloads instead of relying on guesswork.

Agent

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 agents/danstrem2/clawdbot-skill-master-pack/performance-optimizer
Clone the repo
git clone --depth 1 https://github.com/danstrem2/clawdbot-skill-master-pack
Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,068 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00053 $0.01068
Opus 5 $0.00026 $0.00534
Sonnet 5 $0.00011 $0.00214
Haiku 4.5 $0.00005 $0.00107

Measured 2d ago against content hash 967089346570, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

performance-optimizer scanned grade A with 0 findings 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 2d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/performance-optimizer.md · 188 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

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. 2d ago First seen · 188 lines · 53 tokens per session scan A 967089346570

Subscribe to this mod's changes

performance-optimizer is an agent published in the GitHub repository danstrem2/clawdbot-skill-master-pack (2 stars, last pushed 7mo ago), with no licence file. It adds 53 tokens to every session and 1,068 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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