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 DevExpress/agent-skills --skill devexpress-xaf-business-modelgit clone --depth 1 https://github.com/DevExpress/agent-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/devexpress/agent-skills/devexpress-xaf-business-model)<a href="https://agentmods.dev/skills/devexpress/agent-skills/devexpress-xaf-business-model"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-business-model/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/devexpress/agent-skills/devexpress-xaf-business-model"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-business-model.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00146 | $0.03981 |
| Opus 5.5 | $0.00058 | $0.01592 |
| Sonnet 5.5 | $0.00029 | $0.00796 |
| Haiku 4.5 | $0.00015 | $0.00398 |
Grade A, and why
devexpress-xaf-business-model 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 10d 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 — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevExpress XAF — Business Model Design
XAF business model classes define your database schema and drive UI generation. You declare C# classes with properties; XAF maps them to database tables, generates List Views and Detail Views, and wires up property editors automatically. Both Entity Framework Core and XPO are supported as the underlying ORM.
When to Use This Skill
Use this skill when you need to:
- Create a new business class (entity) for an XAF application
- Choose the right base class (EF Core
BaseObjectvs XPOBaseObject/XPObject/XPCustomObject) - Define one-to-many, many-to-many, one-to-one, or aggregated relationships
- Apply XAF attributes to control UI and metadata (
[DefaultClassOptions],[ModelDefault],[XafDisplayName], etc.) - Register entity types in
DbContext(EF Core) orModuleBase.AdditionalExportedTypes(XPO) - Supply initial/seed data via the
Updater.UpdateDatabaseAfterUpdateSchema()method - Configure EF Core migrations or automatic schema updates
- Initialize default property values via
IXafEntityObject.OnCreated()orAfterConstruction() - Map property types to built-in property editors
- Reverse-engineer an existing database into EF Core entities
Prerequisites & Installation
NuGet Packages
| Package | Purpose |
|---|---|
DevExpress.ExpressApp.EFCore |
EF Core Object Space provider |
DevExpress.Persistent.Base |
XAF attributes and interfaces (DefaultClassOptionsAttribute, IXafEntityObject, etc.) |
DevExpress.Persistent.BaseImpl.EF |
Built-in EF Core base classes (BaseObject, PermissionPolicyUser, etc.) |
DevExpress.ExpressApp.Xpo |
XPO Object Space provider (XPO projects only) |
DevExpress.Persistent.BaseImpl.Xpo |
Built-in XPO base classes (XPO projects only) |
dotnet add package DevExpress.ExpressApp.EFCore
dotnet add package DevExpress.Persistent.BaseImpl.EF
Important: All DevExpress packages in a project must share the same version number (e.g., 26.1.x). A valid DevExpress license is required.
What ships with it
4 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.
- 10d ago First seen · 272 lines · 146 tokens per session scan A 7d3524d9f70c
devexpress-xaf-business-model is a skill published in the GitHub repository DevExpress/agent-skills (66 stars, last pushed 11d ago), licensed MIT. It adds 146 tokens to every session and 3,981 once invoked, about $0.0006 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 2026-10-20.
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