cratis-arc-ef-core-migration SKILL.md skillA
cratis-arc-ef-core-migration from cratis/ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cratis/ai/cratis-arc-ef-core-migration@git:20261012.1578108Pins git:20261012.1578108 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cratis/ai
- Path
.cratis/ai/skills/cratis-arc-ef-core-migration/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261012.1578108, committed Oct 12, 2026
- First version recorded
- Sep 11, 2026
- Size
- 11,768 bytes
- Repository stars
- 4
- License
- MIT
Change an Entity Framework Core schema in a Cratis Arc application — the DbContext base types Arc provides, the cross-database column helpers, JSON columns, how a migration is created and applied, and how an EF Core read model becomes injectable into a command. Use when adding or changing a table, column, relationship, or index behind an Arc application. Do not use for Chronicle read models or for query paging.
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
# Change an EF Core schema in an Arc application Arc adds three things to Entity Framework Core: DbContext base types that apply its conversions, cross-database column helpers for migrations, and a resolver that makes an EF Core read model injectable into a command by the command's key. Everything else is ordinary EF Core. ## Verified product sources | Package | Version | Purpose | | --- | --- | --- | | `Cratis.Arc.EntityFrameworkCore` | `22.75.0` | `BaseDbContext`, `ReadOnlyDbContext`, `WithEntityFrameworkCore`, column helpers, `EntityFrameworkReadModelForCommandResolver` | | `Cratis.Arc.Core` | `22.75.0` | `Cratis.Arc.Queries.ModelBound.ReadModelAttribute`, `ICanResolveReadModelForCommand` | | `Microsoft.EntityFrameworkCore` | `10.0.11` | EF Core itself, including all migration tooling | > Arc EF context, builder and observation surface rechecked at v22.75.0. > Verify provider-specific migration behavior against the configured provider. Reverify before claiming support for another version. ⚠️ **Arc ships no migration tooling of its own.** There is no design-time DbContext factory, no migration runner, no table-name constant convention, and …
Read the whole file at its exact version.
How to install
mdr add cratis/ai/cratis-arc-ef-core-migration@sha256:36e61b6e8fcf8fdfThe line at the top of this page pins the label git:20261012.1578108, 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_u7l2ekzounlbryyi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 11, 2026 and Oct 12, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261012.1578108 latest | 2026-10-12 | 1578108 | 11,768 B | A | view · diff |
| git:20261007.41fab73 | 2026-10-07 | 41fab73 | 11,633 B | A | view · diff |
| git:20260916.8e5daaa | 2026-09-16 | 8e5daaa | 11,556 B | A | view · diff |
| git:20260911.75ad9bc | 2026-09-11 | 75ad9bc | 11,007 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 (11768 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
cratis/ai · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_u7l2ekzounlbryyi GET https://markdownregistry.com/api/v1/resolve?ref=cratis/ai/cratis-arc-ef-core-migration GET https://markdownregistry.com/api/v1/blob/36e61b6e8fcf8fdfe8c48584ff3045f17290b78230cf83661ebb5f2224cec209
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.