c4-model skillA
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c4-model is agent-read markdown (skill) from ulises-jeremias/agent-toolkit: WHAT — C4 model methodology (Context, Container, Component, Code) guidance — what to draw at each level, when, and how to render C4-inspired diagrams via Mermaid (PlantUML/Structurizr optional advanced). Methodology not renderer..
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What the file says
# C4 Model — Methodology Overlay (WHAT → HOW via Mermaid) **Sources (2026-08-12):** Simon Brown C4 https://c4model.com/ (Context, Container, Component, Code); Structurizr DSL https://github.com/structurizr/dsl (open-source DSL, paid cloud) + `structurizr-mcp` https://github.com/cubical6/structurizr-mcp + `go-structurizr`; C4-PlantUML https://github.com/plantuml-stdlib/C4-PlantUML; overarch https://github.com/soulspace-org/overarch (PlantUML/Structurizr generation); rendering **via Mermaid** `mermaid-js/mermaid` MIT per §44. > **Pack:** `architecture` core (`architect + ADR + TRD + threat-model + mermaid (+ C4 via mermaid)`) — `c4-model` teaches *what* to draw; `mermaid` renders it. See `docs/architecture/research-385-diagram.md` for C4 vs Mermaid vs PlantUML/Structurizr decision (Excalidraw/draw.io REJECT). ## When to use - Need system Context / Container / Component / Code views. ## Instructions 1. **Select level:** Context (system + actors) → Container (apps/data stores) → Component (modules) → Code (classes, optional). 2. **Render via Mermaid** (C4-inspired): `flowchart TD` with `subgraph` for boundaries, e.g.: ```mermaid flowchart TD …
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How to install
mdr add ulises-jeremias/agent-toolkit/c4-model@v1.0mdr add ulises-jeremias/agent-toolkit/c4-model@sha256:65b2d4c2f03c1d19Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_ryn6tfvug3oasa27)
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Audit of the latest version
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Source
ulises-jeremias/agent-toolkit · 18 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ryn6tfvug3oasa27 GET https://markdownregistry.com/api/v1/resolve?ref=ulises-jeremias/agent-toolkit/c4-model GET https://markdownregistry.com/api/v1/blob/65b2d4c2f03c1d198cc2237cd058ef745bc06247bb6858d83ebf5a3d07862df6
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