What is diagram-design?

A reference guide for designing fourteen kinds of diagrams, including flowcharts, timelines, sequence diagrams, trees, and architecture diagrams. In this setup it is guidance for creating diagrams in presentation slides, not a standalone web-page generator.

Use it when hand-authoring diagram slides and deciding how to arrange nodes, connections, labels, and visual structure.

It helps keep diagram layouts readable and appropriate to the relationship being shown. It also clarifies how this reference is used within the presentation workflow.

How byungjunjang/slide-master configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to byungjunjang/slide-master. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/byungjunjang/slide-master/main/.claude/skills/diagram-design/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/byungjunjang/slide-master

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/byungjunjang/slide-master/diagram-design/github.svg)](https://agentmods.dev/skills/byungjunjang/slide-master/diagram-design)

Your own site

<a href="https://agentmods.dev/skills/byungjunjang/slide-master/diagram-design"><img src="https://agentmods.dev/badge/skills/byungjunjang/slide-master/diagram-design/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/byungjunjang/slide-master/diagram-design"><img src="https://agentmods.dev/badge/skills/byungjunjang/slide-master/diagram-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,207 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00077	$0.02207
Opus 5	$0.00039	$0.01104
Sonnet 5	$0.00015	$0.00441
Haiku 4.5	$0.00008	$0.00221

Measured 11d ago against content hash 9ecf90e39533, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

diagram-design scanned grade A with 0 findings 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 11d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/diagram-design/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Diagram Design

ppt-master integration note: This skill is vendored as a reference library. In this repo, diagram slides are hand-authored by ppt-master's Executor as SVG pages in svg_output/ — not emitted as standalone HTML. Do NOT run the URL onboarding flow (references/onboarding.md) or the upstream style-guide gate; colors, fonts, and icons always come from the project's spec_lock.md, and the SVG must obey ppt-master's technical constraints (.claude/skills/ppt-master/references/shared-standards.md). The guidance below is upstream context — read it for per-type layout conventions, node/edge discipline, and complexity budgets, then author the page per ppt-master SKILL.md Step 6.

The upstream onboarding / one-time-setup / standalone-HTML-export sections (§0 style-guide gate, §5 Design System skinning, §6 HTML-skin SVG primitives, §7 page layout, §8 summary cards, §10 templates & variants, §11 HTML output) are preserved verbatim in references/diagram-onboarding-legacy.md — upstream provenance record only, never executed in ppt-master.

Fourteen diagram types. One shared design system, complexity budget, and taste gate. Type-specific conventions live in references/ and are loaded only when you pick a type.

1. Philosophy

The highest-quality move is usually deletion.

From .impeccable.md: "Confident restraint. Earn every element. One color accent, two families, a small spacing vocabulary. If removing it wouldn't hurt the page, remove it."

Applied to schematics:

Every node represents a distinct idea. Two nodes that always travel together are one node.
Every connection carries information. If the relationship is obvious from layout, remove the line.
Coral is editorial, not a flag. 1–2 focal nodes per diagram. Using it on 5 nodes erases the signal.
The schematic isn't done when everything is added. It's done when nothing can be removed.

Target density: 4/10. Enough to be technically complete. Not so dense it needs a guide. Above 9 nodes, it's probably two diagrams.

Read the full file on GitHub · 192 lines

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

11d ago First seen · 192 lines · 77 tokens per session scan A 9ecf90e39533

Subscribe to this mod's changes

diagram-design is a skill published in the GitHub repository byungjunjang/slide-master (247 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 2,207 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Design and UX

webgl-holographic-foil

A self-contained WebGL2 hero: thin-film interference over a crushed-foil surface whose palette shifts with the viewing angle; move the cursor to tilt the film.

nexu-io/open-design · 41 tokens

html-ppt-hermes-cyber-terminal

OpenDesign + BYOK: choosing and wiring your own model, hands-on — cost, quality, and the routing decision. Built as a decision-grade AI literacy deck for engineers, IT, applied-AI teams.

nexu-io/open-design · 53 tokens

html-ppt-taste-brutalist

16:9 HTML deck in tactical-telemetry / CRT-terminal taste. Deactivated-CRT charcoal slides, white-phosphor monospace, hazard-red accent, scanline overlay, ASCII syntax, density over decoration. Distilled from Leonxlnx/taste-skill brutalist-skill (Tactical Telemetry mode).

nexu-io/open-design · 78 tokens

slide-master: Skill for Claude Code