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Agent skill

Cost Local

by ruvnet in ruvnet/ruflo

Cost per million tokens on hardware you own (Ollama, llama.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a…

MITAuto-check: notesAI & LLM Engineering

Install Cost Local

skills CLI
$ npx skills add ruvnet/ruflo --skill cost-local -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ruvnet/ruflo cost-local --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/ruflo-cost-tracker/skills/cost-local .claude/skills/cost-local && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
cost-local
GitHub stars
74k
Token cost
~336 tokens
SKILL.md length
111 words
Files
1
Skills in repo
264
Repo updated
First seen
Licence
MIT

At a glance

Cost per million tokens on hardware you own (Ollama, llama.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a…

  • Local-vs-API break-even questions
  • Calls node
  • Tasks that involve LLM inference and serving

What it does

Cost Local is an agent skill from ruvnet/ruflo. Cost per million tokens on hardware you own (Ollama, llama.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a hosted model. Use for local-vs-API break-even questions.

Its SKILL.md is about 340 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering LLM inference and serving. It works with llama.cpp, Ollama and vLLM. The repository describes itself as: 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory…. The licence is MIT.

When your agent uses it

  • Local-vs-API break-even questions
  • Tasks that involve LLM inference and serving

Example prompts

  • “/cost-local”

Requirements

  • Pre-approved tools (allowed-tools): Bash

What it can do on your machine

Read from SKILL.md and the folder at commit 58e0ae7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • node

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cost Local loads about 336 tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 111 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~66
When it runs · the whole SKILL.md, loaded when a task matches
~336

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from ruvnet/ruflo at commit 58e0ae7, republished under its MIT licence (© ruvnet). 111 words, ~336 tokens.

Download SKILL.mdSave it as .claude/skills/cost-local/SKILL.md (or your agent's skills folder).
name
cost-local
description
Cost per million tokens on hardware you own (Ollama, llama.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a hosted model. Use for local-vs-API break-even questions.
allowed-tools
Bash
argument-hint
--tok-per-s <n> [--busy 0.25] [--compare <model>] [--format json|markdown]

Cost Local

bash
node ${CLAUDE_PLUGIN_ROOT}/scripts/local-cost.mjs --tok-per-s 80 --busy 0.25 --compare claude-haiku-4-5

Inputs (all the user's): --watts-idle, --watts-active, --kwh, --hw-price, --life-years, --resale. --tok-per-s is required and must be a measured generation speed.

Rules

  • Cost = fixed (amortisation + idle power, paid busy or not) + marginal (extra watts while generating). Utilisation decides the answer: always show the table at 5/25/50/100% busy.
  • It is an estimate from the inputs; say so. Nothing is measured.
  • Compare against a same-capability hosted model, not a frontier one; price alone is a poor reason to buy a GPU for sporadic use.
  • Read real counts from the server (Ollama eval_count/prompt_eval_count on the native API, llama.cpp timings, vLLM /metrics), not the lossy OpenAI-compatible usage, and count model reloads (load_duration) as overhead.

© ruvnet, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/ruflo-cost-tracker/skills/cost-local of ruvnet/ruflo.

Open the folder on GitHubat commit 58e0ae7

Compare with similar skills

Cost Local next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cost Local compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Cost Local this skillruvnet/ruflo74k—~336Automated safety check: NotesMIT
Aider DelegateamElnagdy/delegate-skills2.3k2 repos~3kAutomated safety check: PassMIT
Resolvealexziskind1/model-shelf130—~792Automated safety check: PassMIT
Ollama Optimizerluongnv89/skills131—~4.1kAutomated safety check: NotesMIT
Local LLM Expertsickn33/agentic-awesome-skills47k2 repos~1.6kAutomated safety check: PassMIT
Jetson LLM BenchmarkNVIDIA/skills3.5k1 repos~3.1kAutomated safety check: PassApache-2.0

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Works with

Categories

Questions about Cost Local

What does Cost Local do?

Cost per million tokens on hardware you own (Ollama, llama.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a…. Cost Local is an agent skill from ruvnet/ruflo.cpp, vLLM, LM Studio) from watts, electricity price, hardware price and measured tokens/second, and the utilisation at which local beats a hosted model.

When should I use Cost Local?

Cost Local fits situations like: local-vs-API break-even questions; tasks that involve LLM inference and serving.

How do I install Cost Local in Claude Code?

Run `npx skills add ruvnet/ruflo --skill cost-local -a claude-code`. Or copy the skill folder (plugins/ruflo-cost-tracker/skills/cost-local in ruvnet/ruflo) into .claude/skills/cost-local in your project. Claude Code loads it when a task matches its description.

How do I install Cost Local in Codex?

Run `npx skills add ruvnet/ruflo --skill cost-local -a codex`. Or copy the skill folder (plugins/ruflo-cost-tracker/skills/cost-local in ruvnet/ruflo) into .agents/skills/cost-local in your project. Codex loads it when a task matches its description.

Can I use Cost Local in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ruvnet/ruflo --skill cost-local -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cost-local, .gemini/skills/cost-local, .github/skills/cost-local and .opencode/skills/cost-local in your project.

What does Cost Local need to run?

Going by SKILL.md and its folder, Cost Local needs the command-line tools its instructions call (node). Its frontmatter pre-approves these tools: Bash.

Does Cost Local access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Cost Local safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Cost Local use?

Cost Local is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Cost Local use?

About 336 tokens (SKILL.md is roughly 1.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Cost Local?

Skills that share tags, products or a category with Cost Local: Aider Delegate (amElnagdy/delegate-skills, 2.3k stars), Resolve (alexziskind1/model-shelf, 130 stars), Ollama Optimizer (luongnv89/skills, 131 stars) and Local LLM Expert (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cost Local?

ruvnet (a GitHub user) maintains it in ruvnet/ruflo, which has 74,159 GitHub stars. The repository holds 264 skills in this directory. The repository was last updated on October 9, 2026.

Source: ruvnet/ruflo on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.