Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add managedcode/dotnet-skills --skill entity-framework-coregit clone --depth 1 https://github.com/managedcode/dotnet-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/managedcode/dotnet-skills/entity-framework-core)<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/entity-framework-core"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/entity-framework-core/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/entity-framework-core"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/entity-framework-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00110 | $0.02138 |
| Opus 5.5 | $0.00044 | $0.00855 |
| Sonnet 5.5 | $0.00022 | $0.00428 |
| Haiku 4.5 | $0.00011 | $0.00214 |
Grade A, and why
entity-framework-core scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 293 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Entity Framework Core
Trigger On
- working on
DbContext, migrations, model configuration, or EF queries - reviewing tracking, loading, performance, or transaction behavior
- porting data access from EF6 or custom repositories to EF Core
- optimizing slow database queries
Documentation
References
- patterns.md - Query patterns, tracking strategies, loading strategies, projections, compiled queries, pagination, and temporal tables
- anti-patterns.md - Common EF Core mistakes including N+1 queries, large contexts, generic repositories, and missing indexes
Workflow
- Prefer EF Core for new development unless a documented gap requires Dapper or raw SQL
- Keep
DbContextlifetime scoped — align with unit of work - Review query translation — check generated SQL, avoid N+1
- Treat migrations as first-class — reviewable, not throwaway
- Be deliberate about provider behavior — cross-provider but not identical
- Validate with query inspection — not just in-memory mental model
Current Upstream Notes
- EF Core
v10.0.11is a servicing release. It fixes Azure SQL compatibility-level 170 JSON translation so nestedOPENJSONprojections retainAS JSON, and keeps EF compatible with .NET 11MemoryExtensions.Min/Maxoverload additions. Re-run provider-backed JSON queries and compile against the repository's selected target framework after upgrading. - The August 2026 EF Core vs EF6 comparison remains the first stop for migration decisions. EF Core is the active cross-platform stack, but EF6-only EDMX/ObjectContext-heavy code should not move without a feature inventory and database-backed equivalence tests.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 293 lines · 110 tokens per session scan A 4def57730a68
entity-framework-core is a skill published in the GitHub repository managedcode/dotnet-skills (489 stars, last pushed today), licensed MIT. It adds 110 tokens to every session and 2,138 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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