performance

A set of checks and benchmarks for improving a command-line program's performance. It focuses on startup time, memory use, and the number of tokens used in related output or processing.

In plain words
What is it for?
Use it when measuring or improving RTK's startup speed, memory usage, or token savings.
Why use it?
It helps identify where the program is slow, uses too much memory, or consumes more tokens than needed. This gives performance work concrete measurements to compare.

Skill for Claude CodeCodex

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/mdmatk/tormentnexus/performance
Any agent
npx skills add MDMAtk/TormentNexus --skill performance
Clone the repo
git clone --depth 1 https://github.com/MDMAtk/TormentNexus

Made for: Claude Code, Codex.

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,394 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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 $0.00013 $0.03394
Opus 5 $0.00006 $0.01697
Sonnet 5 $0.00003 $0.00679
Haiku 4.5 $0.00001 $0.00339

Measured 3d ago against content hash 4ea0282376d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

performance scanned grade B 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 3d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo dtrace -n 'syscall::open*:entry { @[execname] = count(); }' &
third_party/rtk/.claude/skills/performance/SKILL.md · 436 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. 3d ago First seen · 436 lines · 13 tokens per session scan B 4ea0282376d2

Subscribe to this mod's changes

performance is a skill published in the GitHub repository MDMAtk/TormentNexus (11 stars, last pushed 1mo ago), with no licence file. It adds 13 tokens to every session and 3,394 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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