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-logicgit 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-logic)<a href="https://agentmods.dev/skills/devexpress/agent-skills/devexpress-xaf-business-logic"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-business-logic/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-logic"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-business-logic.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 | $0.00186 | $0.02765 |
| Opus 5.5 | $0.00074 | $0.01106 |
| Sonnet 5.5 | $0.00037 | $0.00553 |
| Haiku 4.5 | $0.00019 | $0.00277 |
Grade A, and why
devexpress-xaf-business-logic 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 — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevExpress XAF — Business Logic & CRUD Operations
All data manipulation in XAF applications flows through the Object Space — an ORM-independent abstraction implementing the Repository and Unit of Work patterns. This skill covers creating, reading, updating, and deleting objects, handling Object Space events, and implementing business logic in controllers and business classes.
ORM Detection — Composite Skill Pattern
Before generating code, inspect the project:
- Check
usingdirectives forDevExpress.Xpo,DevExpress.Persistent.BaseImpl(XPO indicators) - Check
.csprojforDevExpress.ExpressApp.Xpopackage references - If XPO is detected, also load
devexpress-xaf-business-logic-xpofor XPO-specific patterns (Session, UnitOfWork, XPCollection, NestedUnitOfWork, AfterConstruction/OnSaving overrides)
This base skill covers the ORM-independent IObjectSpace API used by both EF Core and XPO applications.
When to Use This Skill
- Create new persistent objects and save them to the database
- Load objects by key, criteria, or LINQ query
- Delete objects programmatically
- Handle save/commit lifecycle events (Committing, Committed, ObjectSaving)
- React to property changes (ObjectChanged, ModifiedChanged)
- Refresh or rollback unsaved changes
- Access Object Space in controllers, business classes, Updater, or ASP.NET Core services
- Create additional Object Spaces for bulk operations or popup views
- Implement business logic in IXafEntityObject lifecycle hooks
Prerequisites & Installation
| Package | Purpose |
|---|---|
DevExpress.ExpressApp |
Core XAF framework, IObjectSpace, IXafEntityObject, IObjectSpaceLink |
DevExpress.ExpressApp.EFCore |
EFCoreObjectSpace implementation |
DevExpress.Persistent.Base |
Attributes (DefaultClassOptionsAttribute, ActionAttribute, etc.) |
DevExpress.Persistent.BaseImpl.EF |
BaseObject for EF Core (implements IXafEntityObject + IObjectSpaceLink) |
Before You Start — Ask the Developer
What ships with it
6 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 · 220 lines · 186 tokens per session scan A 9550ba210415
devexpress-xaf-business-logic is a skill published in the GitHub repository DevExpress/agent-skills (66 stars, last pushed 11d ago), licensed MIT. It adds 186 tokens to every session and 2,765 once invoked, about $0.0007 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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