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Agent skill

Diagrams

by citypaul in citypaul/.dotfiles

Create or audit maintainable diagrams when relationships, sequence, state, hierarchy, or quantitative comparisons are materially clearer visually than in prose.

Custom licenceAuto-check passedDevelopment

Install Diagrams

skills CLI
$ npx skills add citypaul/.dotfiles --skill diagrams -a claude-code

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

GitHub CLI
$ gh skill install citypaul/.dotfiles diagrams --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/citypaul/.dotfiles.git skills-src && mkdir -p .claude/skills && cp -r skills-src/claude/.claude/skills/diagrams .claude/skills/diagrams && 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
diagrams
GitHub stars
740
Token cost
~1.4k tokens
SKILL.md length
714 words
Files
3 (incl. references)
Skills in repo
44
Repo updated
First seen
Licence
Custom licence

At a glance

Create or audit maintainable diagrams when relationships, sequence, state, hierarchy, or quantitative comparisons are materially clearer visually than in prose.

  • Works in 5 steps: Establish The Contract → Choose The Smallest Supported Format → Model Before Styling → …
  • Tasks that involve Diagrams
  • SKILL.md covers 1. Establish The Contract, 2. Choose The Smallest…, 3. Model Before Styling and 4. Make The Meaning Available…, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Diagrams is an agent skill from citypaul/.dotfiles. Create or audit maintainable diagrams when relationships, sequence, state, hierarchy, or quantitative comparisons are materially clearer visually than in prose. Selects a format the destination actually renders, preserves source authority, validates output, and includes an accessible text explanation.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/source-notes.md`).

It sits in Development, covering Diagrams. It works with Mermaid.

When your agent uses it

  • Tasks that involve Diagrams

Example prompts

  • “/diagrams”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Establish The Contract
  2. Choose The Smallest Supported Format
  3. Model Before Styling
  4. Make The Meaning Available Without The Renderer
  5. Validate The Real Output

What it can do on your machine

Read from SKILL.md and the folder at commit cd4028d. 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

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    Links to these hosts (documentation or services it may open):

    • mermaid.js.org
    • graphviz.org
    • vega.github.io
    • plantuml.com
    • jsoncanvas.org

    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

Diagrams loads about 1.4k tokens when it runs, and up to ~1.9k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 714 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~78
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.9k

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); files beside SKILL.md 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 714 words (~1,442 tokens).

“Use the smallest visual that makes the relationship easier to understand. A short paragraph or table wins when it communicates the same thing more clearly.”

— opening of SKILL.md by citypaul, Custom licence
name
diagrams
metadata.provenance
Original 2026 rewrite; historical import removed. See references/source-notes.md.

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in claude/.claude/skills/diagrams of citypaul/.dotfiles.

  • SKILL.md
  • NOTICE
  • references/source-notes.md

Open the folder on GitHubat commit cd4028d

Compare with similar skills

Diagrams 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.

Diagrams compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Diagrams this skillcitypaul/.dotfiles740—~1.4kAutomated safety check: PassCustom licence
Archify Diagramstt-a1i/archify82k—~2.9kAutomated safety check: PassMIT
Diagram Designcathrynlavery/diagram-design49k1 repos~7.6kAutomated safety check: PassMIT
Draw.io Diagram StudioAgents365-ai/drawio-skill10k—~2.4kAutomated safety check: NotesMIT
Pretty Mermaid Rendererimxv/Pretty-mermaid-skills1.5k—~2kAutomated safety check: PassMIT
Archify Diagram BuilderUnclecheng-li/AI_Animation1.5k2 repos~4.1kAutomated safety check: PassMIT

Similar skills

  • Archify Diagrams

    tt-a1i/archify

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    82k GitHub stars~2.9k tokensUpdated today
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  • Diagram Design

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    Creates branded diagrams, from architecture, flowchart and sequence to charts and maps, as self-contained HTML with inline SVG, with import from draw.io, Mermaid and Excalidraw.

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  • Draw.io Diagram Studio

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  • Pretty Mermaid Renderer

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    Writes and renders Mermaid diagrams as themed SVG, PNG or terminal ASCII and Unicode art with a bundled Node.js CLI that needs no browser.

    1.5k GitHub stars~2k tokensUpdated 1 mo ago
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  • Archify Diagram Builder

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    Builds validated architecture, workflow, sequence, data-flow and lifecycle diagrams as standalone interactive HTML from a small JSON spec, with optional motion and image export.

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Works with

Categories

Questions about Diagrams

What does Diagrams do?

Create or audit maintainable diagrams when relationships, sequence, state, hierarchy, or quantitative comparisons are materially clearer visually than in prose. dotfiles. Create or audit maintainable diagrams when relationships, sequence, state, hierarchy, or quantitative comparisons are materially clearer visually than in prose.

When should I use Diagrams?

Diagrams fits situations like: tasks that involve Diagrams.

How do I install Diagrams in Claude Code?

Run `npx skills add citypaul/.dotfiles --skill diagrams -a claude-code`. Or copy the skill folder (claude/.claude/skills/diagrams in citypaul/.dotfiles) into .claude/skills/diagrams in your project. Claude Code loads it when a task matches its description.

How do I install Diagrams in Codex?

Run `npx skills add citypaul/.dotfiles --skill diagrams -a codex`. Or copy the skill folder (claude/.claude/skills/diagrams in citypaul/.dotfiles) into .agents/skills/diagrams in your project. Codex loads it when a task matches its description.

Can I use Diagrams 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 citypaul/.dotfiles --skill diagrams -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/diagrams, .gemini/skills/diagrams, .github/skills/diagrams and .opencode/skills/diagrams in your project.

What does Diagrams need to run?

SKILL.md names no scripts, command-line tools or credentials: Diagrams is instructions for the agent only.

Does Diagrams access the network?

SKILL.md names 5 domains. As links in the text: mermaid.js.org, graphviz.org, vega.github.io, plantuml.com and jsoncanvas.org. This is read from the text; nothing was executed.

Is Diagrams 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. Review the folder before installing.

What licence does Diagrams use?

Diagrams has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Diagrams use?

About 1.4k tokens (SKILL.md is roughly 5.8k 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 474 tokens, read only when the agent opens those files.

What are the alternatives to Diagrams?

Skills that share tags, products or a category with Diagrams: Archify Diagrams (tt-a1i/archify, 82k stars), Diagram Design (cathrynlavery/diagram-design, 49k stars), Draw.io Diagram Studio (Agents365-ai/drawio-skill, 10k stars) and Pretty Mermaid Renderer (imxv/Pretty-mermaid-skills, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Diagrams?

citypaul (a GitHub user) maintains it in citypaul/.dotfiles, which has 740 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 9, 2026.

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