Agent skill

Capacity

by VectorSpaceLab in VectorSpaceLab/AREX-Skill

A skill your agent uses when updating installed capacity data, adding capacity parsers, or diagnosing Electricity Maps capacity configuration timelines.

Custom licenceAuto-check passed

Install Capacity

skills CLI
$ npx skills add VectorSpaceLab/AREX-Skill --skill capacity -a claude-code

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

GitHub CLI
$ gh skill install VectorSpaceLab/AREX-Skill capacity --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/VectorSpaceLab/AREX-Skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/repositories/repo-skills/electricitymaps-contrib/sub-skills/capacity .claude/skills/capacity && 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
capacity
GitHub stars
330
Token cost
~860 tokens
SKILL.md length
300 words
Files
5 (incl. scripts, references)
Skills in repo
159
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when updating installed capacity data, adding capacity parsers, or diagnosing Electricity Maps capacity configuration timelines.

  • Works in 4 steps: Decide whether the user wants a single… → Inspect available capacity parser… → Execute only after confirming… → …
  • Updating installed capacity data
  • SKILL.md covers First decisions, Read these references, Capacity workflow checklist and Focused checks
  • Runs Python scripts from its folder; calls python and uv; needs ENTSOE_TOKEN and EIA_KEY

What it does

Capacity is an agent skill from VectorSpaceLab/AREX-Skill. Use when updating installed capacity data, adding capacity parsers, or diagnosing Electricity Maps capacity configuration timelines.

Its SKILL.md is about 860 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts and reference files (for example `references/data-formats.md`, `references/troubleshooting.md` and `references/workflows.md`).

The repository describes itself as: A Skill Library for Automated Machine Learning.

When your agent uses it

  • Updating installed capacity data
  • Adding capacity parsers
  • Diagnosing Electricity Maps capacity configuration timelines

Example prompts

  • “/capacity”

Requirements

  • Python 3
  • A credential in ENTSOE_TOKEN
  • A credential in EIA_KEY

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Decide whether the user wants a single zone update, a source group
  2. Inspect available capacity parser ownership before mutating files
  3. Execute only after confirming network/API-token requirements and expected
  4. Review the config diff and run focused native tests before formatting or

What it can do on your machine

Read from SKILL.md and the folder at commit ac3fe1a. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python
    • uv

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

  • Network

    No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.

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

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • ENTSOE_TOKEN
    • EIA_KEY
    • EMBER_CAPACITY_KEY
    • OPENELECTRICITY_TOKEN
    • FINGRID_TOKEN

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

Context cost

Capacity loads about 860 tokens when it runs, and up to ~3.8k if it reads all its reference files. Until then it costs about 35 tokens; SKILL.md has 300 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~35
When it runs · the whole SKILL.md, loaded when a task matches
~860
With references · SKILL.md plus every file in references/, read only if the agent opens them
~3.8k

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 passed

The automated check found no risky patterns in SKILL.md.

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); the scripts in this folder are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 300 words (~860 tokens).

“Use this sub-skill for installed-capacity workflows: capacity parsers, capacity_update, zone capacity config timelines, capacity source groups, and aggregate parent-zone capacity updates.”

— opening of SKILL.md by VectorSpaceLab, Custom licence
name
capacity
disable-model-invocation
true
metadata.disco-role
operating
license
NOASSERTION

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (scripts, references) in skills/repositories/repo-skills/electricitymaps-contrib/sub-skills/capacity of VectorSpaceLab/AREX-Skill.

  • SKILL.md
  • references/data-formats.md
  • references/troubleshooting.md
  • references/workflows.md
  • scripts/capacity_update.py

Open the folder on GitHubat commit ac3fe1a

Compare with similar skills

Capacity 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.

Capacity compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Capacity this skillVectorSpaceLab/AREX-Skill330—~860Automated safety check: PassCustom licence
Openclaw Updateopenclaw/openclaw392k—~1.5kAutomated safety check: PassMIT
Update Installed SkillsMoizIbnYousaf/ai-agent-skills1.1k—~393Automated safety check: PassMIT
Update Docsvercel/next.js143k—~1.9kAutomated safety check: PassMIT
Generating Python Installeraffaan-m/ECC276k1 repos~6.1kAutomated safety check: PassMIT
Skill Installercodewhale-hq/Codewhale41k—~360Automated safety check: PassMIT

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Questions about Capacity

What does Capacity do?

A skill your agent uses when updating installed capacity data, adding capacity parsers, or diagnosing Electricity Maps capacity configuration timelines. Capacity is an agent skill from VectorSpaceLab/AREX-Skill. Use when updating installed capacity data, adding capacity parsers, or diagnosing Electricity Maps capacity configuration timelines.

When should I use Capacity?

Capacity fits situations like: updating installed capacity data; adding capacity parsers; diagnosing Electricity Maps capacity configuration timelines.

How do I install Capacity in Claude Code?

Run `npx skills add VectorSpaceLab/AREX-Skill --skill capacity -a claude-code`. Or copy the skill folder (skills/repositories/repo-skills/electricitymaps-contrib/sub-skills/capacity in VectorSpaceLab/AREX-Skill) into .claude/skills/capacity in your project. Claude Code loads it when a task matches its description.

How do I install Capacity in Codex?

Run `npx skills add VectorSpaceLab/AREX-Skill --skill capacity -a codex`. Or copy the skill folder (skills/repositories/repo-skills/electricitymaps-contrib/sub-skills/capacity in VectorSpaceLab/AREX-Skill) into .agents/skills/capacity in your project. Codex loads it when a task matches its description.

Can I use Capacity 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 VectorSpaceLab/AREX-Skill --skill capacity -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/capacity, .gemini/skills/capacity, .github/skills/capacity and .opencode/skills/capacity in your project.

What does Capacity need to run?

Going by SKILL.md and its folder, Capacity needs Python for the scripts in its folder, the command-line tools its instructions call (python and uv) and credentials named ENTSOE_TOKEN, EIA_KEY, EMBER_CAPACITY_KEY and OPENELECTRICITY_TOKEN. Our summary lists: Python 3; A credential in ENTSOE_TOKEN; A credential in EIA_KEY.

Does Capacity access the network?

SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Capacity safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Capacity use?

Capacity has a licence file (declared in SKILL.md) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Capacity use?

About 860 tokens (SKILL.md is roughly 3.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3k tokens, read only when the agent opens those files.

What are the alternatives to Capacity?

Skills that share tags, products or a category with Capacity: Openclaw Update (openclaw/openclaw, 392k stars), Update Installed Skills (MoizIbnYousaf/ai-agent-skills, 1.1k stars), Update Docs (vercel/next.js, 143k stars) and Generating Python Installer (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Capacity?

VectorSpaceLab (a GitHub organization) maintains it in VectorSpaceLab/AREX-Skill, which has 330 GitHub stars. The repository holds 159 skills in this directory. The repository was last updated on September 3, 2026.

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