dfd SKILL.md skillA
dfd from me2resh/apexyard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add me2resh/apexyard/dfd@git:20261008.3d1669cPins git:20261008.3d1669c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- me2resh/apexyard
- Path
.claude/skills/dfd/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261008.3d1669c, committed Oct 8, 2026
- First version recorded
- May 24, 2026
- Size
- 22,388 bytes
- Repository stars
- 542
- License
- MIT
DFD with trust boundaries + data classifications (Mermaid + optional Threat Dragon JSON). Source-of-truth for /threat-model.
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
# /dfd — Data Flow Diagram Extractor Read `.claude/rules/writing-standard.md`. Use the **controlled technical writing profile** for the DFD and accompanying explanation. Keep classifications and uncertainty explicit. Reads a codebase (or a portfolio of codebases for system-wide DFDs) and produces a Data Flow Diagram showing external actors, processes, data stores, data flows, trust boundaries, and per-element data classifications. The DFD is the **input to STRIDE threat modelling** and to GDPR cross-border / DPA-coverage analysis. This skill is the **canonical DFD producer** in the apexyard family. `/threat-model` and `/compliance-check` consume the DFD it writes instead of regenerating their own — see AgDR-0026 for the design rationale. | Skill | Role | |-------|------| | `/dfd` (this skill) | Produces the DFD — six-axis discovery + classifications + cross-repo trace | | `/threat-model` | Consumes the DFD — STRIDE walk over each trust-boundary crossing | | `/compliance-check` | Consumes the DFD's classifications — cross-border transfers + DPA coverage | | `/c4` | Static topology (different shape — system + containers, no data-flow semantics) | …
Read the whole file at its exact version.
How to install
mdr add me2resh/apexyard/dfd@sha256:21d36ad2c4745feeThe line at the top of this page pins the label git:20261008.3d1669c, 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_fim7qe7hb6do72va)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 24, 2026 and Oct 8, 2026, about one every 34 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.3d1669c latest | 2026-10-08 | 3d1669c | 22,388 B | A | view · diff |
| git:20260927.9042cbe | 2026-09-27 | 9042cbe | 21,847 B | A | view · diff |
| git:20260910.aac255e | 2026-09-10 | aac255e | 21,184 B | A | view · diff |
| git:20260529.b0eb6fa | 2026-05-29 | b0eb6fa | 21,003 B | A | view · diff |
| git:20260524.44f7e7a | 2026-05-24 | 44f7e7a | 20,173 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 (22388 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
me2resh/apexyard · 542 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fim7qe7hb6do72va GET https://markdownregistry.com/api/v1/resolve?ref=me2resh/apexyard/dfd GET https://markdownregistry.com/api/v1/blob/21d36ad2c4745feef2b10dfd846f544c53362287064fbaa27ca3ac9245dae131
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.