c4-modeling SKILL.md skillA
c4-modeling from fabiandistler/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add fabiandistler/agents/c4-modeling@git:20261025.ebda69cPins git:20261025.ebda69c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- fabiandistler/agents
- Path
skills/c4-modeling/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261025.ebda69c, committed Oct 25, 2026
- First version recorded
- Oct 12, 2026
- Size
- 8,444 bytes
- Repository stars
- 2
- License
- none declared
Drafts a C4 model of a software system with the user and renders it as Mermaid at Context, Container, Component, Landscape, Dynamic, and Deployment level (not Code). Use when asked to draw or document a system as C4 diagrams.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# C4 Modeling This skill drafts a C4 model (c4model.com) *with* the user in a short interview, then renders the agreed diagrams as Mermaid so they display directly in the repository and in chat. The one habit that makes C4 diagrams stay consistent: **model first, diagrams second.** All diagrams are projections of one element/relationship table; you never edit a diagram directly, you edit the table and re-derive. ## When to use When someone asks to "draw the architecture", "create a C4 diagram", "make a context / container / component diagram", "visualize the system (landscape / deployment)", or wants architecture documentation with diagrams. The model is elicited interview-style (one question at a time) and reviewed against the c4model.com notation checklist. Not for inventing the component decomposition itself (→ `members/logical-component-design/SKILL.md`) or choosing topology / code organization (→ `members/architecture-pattern-advisor/SKILL.md`); both are read via the `architecture` router. Reference pages: - [references/c4-best-practices.md](references/c4-best-practices.md) (step 1 for diagram choice, step 5 for review) — the …
Read the whole file at its exact version.
How to install
mdr add fabiandistler/agents/c4-modeling@sha256:4fb3a105412fafa1The line at the top of this page pins the label git:20261025.ebda69c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_k7jd5awnhtrc6xo2)
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Versions
The registry has recorded 5 versions of this file, between Oct 12, 2026 and Oct 25, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261025.ebda69c latest | 2026-10-25 | ebda69c | 8,444 B | A | view · diff |
| git:20261023.76ca594 | 2026-10-23 | 76ca594 | 8,294 B | A | view · diff |
| git:20261021.5004bde | 2026-10-21 | 5004bde | 9,131 B | A | view · diff |
| git:20261019.b3c7d90 | 2026-10-19 | b3c7d90 | 9,160 B | A | view · diff |
| git:20261012.204299c | 2026-10-12 | 204299c | 9,077 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8444 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
fabiandistler/agents · 2 stars · license none declared · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_k7jd5awnhtrc6xo2 GET https://markdownregistry.com/api/v1/resolve?ref=fabiandistler/agents/c4-modeling GET https://markdownregistry.com/api/v1/blob/4fb3a105412fafa1bb64e233337930f19f655d697873e51f31290f7e39368c0a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.