efcore-d2-db-diagram SKILL.md skillA
efcore-d2-db-diagram from okhp3/skillz is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add okhp3/skillz/efcore-d2-db-diagram@git:20260828.866dec6Pins git:20260828.866dec6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- okhp3/skillz
- Path
community/efcore-d2-db-diagram/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260828.866dec6, committed Aug 28, 2026
- Size
- 9,145 bytes
- Repository stars
- 3
- License
- MIT
Generate D2 database diagrams from Entity Framework Core models. USE FOR: EF Core database diagram, Entity Framework Core ERD, DbContext diagram, C# entity relationship diagram, PostgreSQL schema visualization, generate .d2 file from EF Core entities, Fluent API mapping diagram, migrations-based database diagram, table relationships, owned types, many-to-many join tables, indexes and constraints. DO NOT USE FOR: runtime debugging, database migration execution, schema deployment, SQL…
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
# EF Core D2 Database Diagram Generator ## When to Use Use this skill when the user wants to generate a database / ERD diagram from an Entity Framework Core codebase. Typical requests: - Generate a D2 database diagram from EF Core entities. - Visualize tables, columns, primary keys, foreign keys and relationships. - Analyze `DbContext`, `DbSet<T>`, `IEntityTypeConfiguration<T>`, Fluent API and migrations. - Produce a `.d2` file renderable to SVG/PNG with the `d2` CLI. - Document the database model of an ASP.NET Core / .NET project. ## Goal Create a readable D2 entity-relationship diagram that reflects the actual EF Core persistence model, not only the raw C# class shape. The diagram must prioritize: 1. Database tables and relationships. 2. Primary keys, foreign keys, required/optional columns. 3. Owned types and value objects. 4. Many-to-many relationships and join tables. 5. Indexes, unique constraints and table names. 6. EF Core conventions only when explicit mapping is absent. Output is `.d2` source code. It can be rendered to SVG or PNG via the `d2` CLI. ## Tools - **d2 CLI**: render `.d2` files to SVG/PNG. - `d2 input.d2 output.svg` …
Read the whole file at its exact version.
How to install
mdr add okhp3/skillz/efcore-d2-db-diagram@sha256:e0689c25df306906The line at the top of this page pins the label git:20260828.866dec6, 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_nfi6atxtdk4ayiz3)
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Versions
The registry has recorded 1 version of this file, committed on Aug 28, 2026.
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 (9145 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
okhp3/skillz · 3 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nfi6atxtdk4ayiz3 GET https://markdownregistry.com/api/v1/resolve?ref=okhp3/skillz/efcore-d2-db-diagram GET https://markdownregistry.com/api/v1/blob/e0689c25df306906b3d916a90fa63a8a5bf78f8ee41328befcbe7f475a58d011
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.