LLM CPU Calculator Agent Skill

Estimate CPU and RAM needs for plain-English LLM workloads.

Context cost
2.9k tokensestimated from the bundle, loaded when it triggers
Bundle
2 files · 20.3 kB1 script among them — read before you run
Licence
MITthe author’s own terms
Last change
—v0.2.0
Servers it uses
Noneruns standalone

What it does

Estimate CPU and RAM needs for plain-English LLM workloads.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

data science

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md11.4 kB · preview
--- name: llm-cpu-calculator license: MIT metadata: author: Rajiv Mehta, Hermes Agent hermes_related_skills: "" hermes_tags: llm, cpu, ram, model-sizing, speculative-decoding platforms: macos, linux version: 0.2.0 ---
13# LLM CPU Calculator Skill
14
15Convert a user's plain-English LLM workload description into a grounded CPU and memory requirement estimate **for a named target machine** — typically a remote server (cloud GPU/CPU box, Lightning.ai instance, rented Linux host). The machine executing this skill is only the calculator host: it runs scripts/estimate.py and nothing else. Never profile the local machine, never produce a local-run verdict, and never recommend local LLM deployment.
16
17This is an estimator, not a benchmark. Never present an exact throughput or an exact KV-cache size when the model architecture, runtime, or concurrency is unknown. Separate measured host facts from estimates and label uncertainty.
18
19## When to Use
20
21Use when the user asks for CPU, RAM, system-memory, SIMD, or server-sizing requirements for an LLM workload intended for a named or remote machine:
22
23- "What CPU and RAM do I need for a 14B Q4 model?"
24- "Size a server for speculative decoding."
25- "Will an 8 vCPU / 32 GiB cloud box handle this?"
26- "Compare two remote server options for this workload."
27
28Do not use for model quality comparisons, training hardware, or a benchmark that requires running the model. For GPU/VRAM-only sizing, explain that this skill can provide only a secondary CPU/RAM estimate unless the user also requests CPU requirements.
29
30**Out of scope, always:** assessing whether the machine running this skill can host the workload. If a question implies local deployment ("can my MacBook run this?"), answer with the target-machine requirements only and state that local deployment is not part of this workflow.
31
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md1,729 words
Files2
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈80
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
2,770
on trigger
The instruction body and 1 supporting file, read only when the skill fires.
1.4%
of a 200k window
Ten skills this size would take about 14% of the window before you open a file.
050k100k150k200k context window

2.9k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Middling. Fine to keep on in a project where you use it weekly, worth unloading in one where you never do.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

2 files, 20.3 kB on disk. Mostly text — the instructions the model reads — with 1 script in it that your client would run only if the instructions tell it to.

  • SKILL.md11.4 kB
  • scripts/estimate.py8.9 kB
What is not in it

A skill installs nothing and depends on nothing: it is a folder your client reads. This one carries 1 script beside the text, so the bundle is 2 files you can review in full before installing. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# LLM CPU Calculator · 2.9k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/llm-cpu-calculator/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/llm-cpu-calculator" ] && { [ ! -e .claude/skills/llm-cpu-calculator ] || { mv .claude/skills/llm-cpu-calculator "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/llm-cpu-calculator" .claude/skills/ && echo "Installed .claude/skills/llm-cpu-calculator"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add rajivmehtaflex/llm-cpu-calculator

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/llm-cpu-calculator/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/llm-cpu-calculator/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/llm-cpu-calculator" ] && { [ ! -e ~/.claude/skills/llm-cpu-calculator ] || { mv ~/.claude/skills/llm-cpu-calculator "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/llm-cpu-calculator" ~/.claude/skills/ && echo "Installed ~/.claude/skills/llm-cpu-calculator" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/llm-cpu-calculator/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Version0.2.0
Publishedno release date on file
PriceFree
Referencerajivmehtaflex/llm-cpu-calculator

Versions

v0.2.0 is what is on the shelf; no release here carries a date. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

v0.2.0
  • No earlier releases have been published to the marketplace.
Pinning

The install command always fetches the release that is current the day you run it — v0.2.0 today — and cannot ask for an earlier one. The copy on your disk does not change until you run it again.

Reviews

—no reviews yet

Nobody has reviewed this skill yet. The rating is the mean of the reviews written here, so there is none until somebody writes the first.

Sign in to review it

A review is tied to an account so it can be answered, edited and taken down by the person who wrote it.

Sign in
Who can post

Anybody with an account, one review each. It carries the version that was current when you wrote it, and the publisher may reply once.

Publisher
Servers0
Claim this skill