A tool for generating architecture diagrams, which show the parts of a software system and how they connect. It supports views such as system context, components, data movement, cloud infrastructure, integrations, and dependencies.

Use it to create or update C4 diagrams, system maps, data-flow diagrams, AWS infrastructure diagrams, integration diagrams, and dependency graphs.

It turns complicated system relationships into visuals that teams can inspect and discuss. This makes it easier to explain boundaries, data paths, infrastructure, and connections between systems.

diagram — Skill for Claude Code by DavidROliverBA

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add DavidROliverBA/ArchitectKB --skill diagram

Clone the repo

git clone --depth 1 https://github.com/DavidROliverBA/ArchitectKB

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/davidroliverba/architectkb/diagram/github.svg)](https://agentmods.dev/skills/davidroliverba/architectkb/diagram)

Your own site

<a href="https://agentmods.dev/skills/davidroliverba/architectkb/diagram"><img src="https://agentmods.dev/badge/skills/davidroliverba/architectkb/diagram/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/davidroliverba/architectkb/diagram"><img src="https://agentmods.dev/badge/skills/davidroliverba/architectkb/diagram.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,134 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.

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	$0.00009	$0.04134
Opus 5	$0.00005	$0.02067
Sonnet 5	$0.00002	$0.00827
Haiku 4.5	$0.00001	$0.00413

Measured 10d ago against content hash c038148d8545, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

diagram 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 10d 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/SKILL.md · 471 lines

How it starts

The opening of the file, as written. The whole thing — 471 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/diagram Skill

Generate architecture diagrams in multiple formats (C4, System Landscape, Data Flow, AWS).

When to Use This Skill

Use /diagram when you need to create or update architecture visualizations:

Create new C4 context/container/component diagrams
Generate system landscape maps
Visualize data flow architectures
Create AWS infrastructure diagrams
Diagram integration patterns
Map system dependencies

Usage

/diagram <type> [options]

Diagram Types

Type	Description	Use Case
`c4-context`	C4 Level 1 - System context	Show external actors and system boundary
`c4-container`	C4 Level 2 - System containers	Show major components (services, databases)
`c4-component`	C4 Level 3 - Component level	Show detailed component interactions
`system-landscape`	Enterprise system map	Show all systems and connections
`data-flow`	Data movement diagram	Show how data moves through systems
`aws-architecture`	AWS infrastructure	Show EC2, RDS, S3, networking
`integration-pattern`	Integration architecture	Show message flows and patterns
`dependency-graph`	System dependencies	Show what depends on what

Workflow

Phase 1: Capture Requirements

When invoked, the skill asks:

Diagram type (required)
- Options: c4-context, c4-container, system-landscape, data-flow, aws-architecture, integration-pattern, dependency-graph
- Default: c4-context
Scope (required)
- For C4: Which system/product?
- For landscape: Which program/domain?
- For AWS: Which account/region?
- For data-flow: Which integration?
Systems to include (optional)
- Comma-separated list of systems
- Leave blank to auto-detect from context
Styling preferences (optional)
- Color scheme: classic, muted, vibrant
- Icon set: simple, detailed, minimalist
- Default: classic, simple
Output format (optional)
- python — PNG via Python diagrams library (default for AWS/landscape types)
- mermaid — Inline Mermaid (default for C4 types; renders natively in Obsidian)
- plantuml — C4-PlantUML with directional hints (for complex C4 layouts, >15 elements)
- For C4 types (c4-context, c4-container, c4-component), suggest Mermaid or PlantUML and cross-reference /c4-diagram for data-driven generation from System note frontmatter

Read the full file on GitHub · 471 lines

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.

10d ago First seen · 471 lines · 9 tokens per session scan A c038148d8545

Subscribe to this mod's changes

diagram is a skill published in the GitHub repository DavidROliverBA/ArchitectKB (52 stars, last pushed 6mo ago), licensed MIT. It adds 9 tokens to every session and 4,134 once invoked, about $0.0000 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.

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