optimizing-ef-core-queries SKILL.md skillA
optimizing-ef-core-queries from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dotnet/skills/optimizing-ef-core-queries@git:20261012.7ce04b1Pins git:20261012.7ce04b1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dotnet/skills
- Path
plugins/dotnet-data/skills/optimizing-ef-core-queries/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261012.7ce04b1, committed Oct 12, 2026
- First version recorded
- Mar 7, 2026
- Size
- 24,565 bytes
- Repository stars
- 5,836
- License
- MIT
Review and optimize application data access that uses Entity Framework Core (EF Core). Use for EF Core performance and correctness reviews of services, repositories, imports, and background jobs: slow or memory-heavy queries, excessive round-trips, hidden SaveChanges, premature materialization, dynamic query construction, result-graph tracking, bulk writes, DbContext lifetime or overlapping operations, search semantics, paging, raw SQL, and model/index coverage. Use whether or not EF Core owns…
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
# Optimizing EF Core Queries Diagnose and fix slow or incorrect application data access built on EF Core. In a source-only review, trace the code without executing it and separate proven code behavior from runtime assumptions. When SQL, logs, or plans are available, use them to confirm the bottleneck. Prefer changes that reduce round-trips, duplicated rows, scans, or per-call translation cost over micro-optimizations. ## When to Use - EF Core queries are slow or emit far more SQL statements than expected - The same query repeats once per row (N+1 / lazy loading) - Multiple collection `Include`s blow up or duplicate rows - Deep pages slow down as `Skip` grows, or bulk updates load rows just to modify them - A filtered/sorted query scans **even though the column is indexed**, or a filtered/sorted column has no supporting index - A hot, frequently-executed query pays EF Core's LINQ-translation cost on every call ## When Not to Use - **The code uses Dapper or raw ADO.NET, not EF Core.** Answer the SQL/indexing/query-plan question directly; do not introduce a `DbContext` or recommend `AsNoTracking`, `Include`, `AsSplitQuery`, or other EF Core APIs. ## Source review workflow …
Read the whole file at its exact version.
How to install
mdr add dotnet/skills/optimizing-ef-core-queries@sha256:a4c0d87d624f3ac1The line at the top of this page pins the label git:20261012.7ce04b1, 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_ruoleha4nzkkocg3)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Mar 7, 2026 and Oct 12, 2026, about one every 73 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261012.7ce04b1 latest | 2026-10-12 | 7ce04b1 | 24,565 B | A | view · diff |
| git:20260805.0b81eee | 2026-08-05 | 0b81eee | 10,970 B | A | view · diff |
| git:20260421.05aeb65 | 2026-04-21 | 05aeb65 | 5,765 B | A | view · diff |
| git:20260307.042a9d2 | 2026-03-07 | 042a9d2 | 5,752 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 (24565 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
dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ruoleha4nzkkocg3 GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/optimizing-ef-core-queries GET https://markdownregistry.com/api/v1/blob/a4c0d87d624f3ac1e291db0e613026815ee3247f5414ece17fd3b45600943ff7
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.