Is C4m safe and trustworthy?

tashan scores C4m on public evidence — tashan score 34.0/100, it is currently active, note: a single primary maintainer (bus-factor risk). Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install C4m?

Configure it from its source repository — it is a remote / registry server.

1 GitHub contributors, source: cheriftj/c4-model-skill.

‹ The Index

C4m

plugin

Interactive C4 architecture diagrams (Simon Brown's model) for Claude Code. Five mode-driven workflows — Design (greenfield), Document-code (retro-doc from a repo), Document-prose (from README/ADR/spec), Review (critique an existing diagram), Update (evolve one) — accessed via /c4m:auto, /c4m:design, /c4m:code, /c4m:prose, /c4m:review, /c4m:update. Output is one Markdown document per C4 level with embedded Mermaid; format negotiable (Structurizr DSL, PlantUML) and destination negotiable (filesys

Works with: Claude Code (native)
native: this artifact type is that client's own format

Category: Design — see all ranked ›

Install (Claude Code):

/plugin marketplace add anthropics/claude-plugins-community
/plugin install c4m@claude-community

solid

“6 worked examples; short of deep on per-tool docs and a stated limitation”

This grade is wrong ›

tashan score: 34.0
Instruction depth: 64.0 (solid — documents the job properly, with examples you could follow)
Adoption: 1 repos
Upkeep: 46.0
Freshness: 60.0
Evidence coverage: 84% of the inputs this score can use — the rest are unknown, and the score is discounted for it
Health: active
GitHub stars: 32
Contributors: 1
License: MIT

Security audit

Not scanned yet. We audit npm-published capabilities for known advisories, install-time scripts and permission surface; this one has no npm package we can resolve, or has not reached the queue.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

C4m scores 34 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

The whole series behind any row, back to the first day we measured it
The replacement, named — not just the news that something died
tashan doctor over your own config, on your own machine

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Show your score

Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/plugin-cheriftj-c4-model-skill-c4m.svg)](https://tashan.sh/capability/plugin-cheriftj-c4-model-skill-c4m.html)

source ↗ · plugin:cheriftj/c4-model-skill/c4m

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-09-13 · scorer s5 · how · something wrong here?