diagram

diagram is a command for Claude Code from doncheli/don-cheli-sdd. It costs 76 tokens per session (666 once invoked), scanned A, original, Apache-2.0.

A code-analysis command that generates Mermaid or C4 diagrams from imports, function calls, data models, and execution flows. Mermaid is a text format for diagrams, while C4 describes software architecture at different levels.

In plain words
What is it for?
Generating class, sequence, architecture, entity-relationship, and business-flow diagrams from selected files or project features.
Why use it?
It creates visual documentation from the code and reduces the need to maintain diagrams by hand.

Command for Claude Code

Written for Claude Code: installed under .claude/.

Part of the don-cheli-sdd plugin — 28 skills, 115 commands, 1 agent shipped together

Good fit Generating class, sequence, architecture, entity-relationship, and business-flow diagrams from selected files or project features.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/doncheli/don-cheli-sdd/diagram
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.

Clone the repo
git clone --depth 1 https://github.com/doncheli/don-cheli-sdd

Made for: Claude Code.

Or install don-cheli-sdd, the plugin that ships this one along with the rest of its 28 skills, 115 commands, 1 agent.

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.

agentmods badge for diagram

README.md
[![agentmods](https://agentmods.dev/badge/commands/doncheli/don-cheli-sdd/diagram/github.svg)](https://agentmods.dev/commands/doncheli/don-cheli-sdd/diagram)
Your own site
<a href="https://agentmods.dev/commands/doncheli/don-cheli-sdd/diagram"><img src="https://agentmods.dev/badge/commands/doncheli/don-cheli-sdd/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.

agentmods 80×15 button for diagram

Your own site · 80×15
<a href="https://agentmods.dev/commands/doncheli/don-cheli-sdd/diagram"><img src="https://agentmods.dev/badge/commands/doncheli/don-cheli-sdd/diagram.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 666 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00076 $0.00666
Opus 5.5 $0.00030 $0.00266
Sonnet 5.5 $0.00015 $0.00133
Haiku 4.5 $0.00008 $0.00067

Measured 1mo ago against content hash 4d424005e87f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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.

scripts/.claude/commands/dc/diagram.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/dc:diagram

Objetivo

Analizar el código fuente del proyecto (imports, llamadas a funciones, modelos de datos, flujos) y producir automáticamente diagramas en formato Mermaid o C4. Elimina el mantenimiento manual de documentación visual y la mantiene sincronizada con el código real.

Uso

/dc:diagram class
/dc:diagram sequence --file src/auth/login.ts
/dc:diagram architecture
/dc:diagram erd --dir src/models
/dc:diagram flowchart --feature checkout
/dc:diagram --output docs/arquitectura.md

Comportamiento

  1. Determinar tipo de diagrama solicitado
  2. Analizar archivos relevantes según el tipo:
    • class → analizar definiciones de clase/interfaz e imports
    • sequence → analizar llamadas a funciones y flujo de ejecución
    • architecture → analizar módulos de alto nivel, dependencias y boundaries (C4 Context/Container)
    • erd → analizar modelos, entidades y relaciones
    • flowchart → analizar lógica de negocio de un flujo o feature
  3. Construir el diagrama en sintaxis Mermaid
  4. Validar que la sintaxis sea correcta (no generar Mermaid inválido)
  5. Guardar como bloque en el archivo destino o imprimir en stdout

Tipos de Diagrama

Tipo Mermaid Fuente analizada
class classDiagram Clases, interfaces, herencia
sequence sequenceDiagram Llamadas, callbacks, async
architecture C4 Context/Container Módulos, boundaries, APIs externas
erd erDiagram Modelos, FK, relaciones
flowchart flowchart TD Lógica condicional, bifurcaciones

Reglas

  • Máximo 20 nodos por diagrama para mantener legibilidad
  • Si el scope es mayor, segmentar en subdiagramas por módulo
  • Nunca inventar relaciones que no existen en el código
  • Anotar la fecha de generación como comentario

Output

<!-- Generado por /dc:diagram — 2026-03-28 -->
```mermaid
classDiagram
  class UserService {
    +createUser(dto) User
    +findById(id) User
  }
  class UserRepository {
    +save(user) void
    +findById(id) User
  }
  UserService --> UserRepository
```

Read the full file on GitHub · 72 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.

  1. 1mo ago First seen · 72 lines · 76 tokens per session scan A 4d424005e87f

Subscribe to this mod's changes

diagram is a command published in the GitHub repository doncheli/don-cheli-sdd (57 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 76 tokens to every session and 666 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.