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-performancegit 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-performance)<a href="https://agentmods.dev/skills/devexpress/agent-skills/devexpress-xaf-performance"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-performance/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-performance"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devexpress-xaf-performance.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 | $0.00086 | $0.02997 |
| Opus 5.5 | $0.00034 | $0.01199 |
| Sonnet 5.5 | $0.00017 | $0.00599 |
| Haiku 4.5 | $0.00009 | $0.00300 |
Grade A, and why
devexpress-xaf-performance 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 — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevExpress XAF — Performance Optimization
Three-layer optimization approach: Database → ORM → Application Code. Profile each layer before applying fixes. EF Core is the recommended ORM; EF Core examples are the default. XPO is also supported — see references/xpo-performance.md for XPO-specific optimizations.
Prerequisites & Installation
Performance optimization uses core XAF APIs — no additional module installation is required. The techniques in this skill apply to existing XAF projects.
NuGet Packages (already included in XAF projects)
| Package | Performance Features |
|---|---|
DevExpress.ExpressApp |
CollectionSourceDataAccessMode, EnableModelCache, GetDeclaredExportedTypes / GetDeclaredControllerTypes overrides |
DevExpress.ExpressApp.Blazor |
BlazorMdiShowViewStrategy.MaxTabLimit, TabOverflowStrategy, IModelOptionsBlazor.RestoreTabbedMdiLayout |
DevExpress.ExpressApp.EFCore |
PreFetchReferenceProperties, change-tracking proxies, EF Core SQL logging |
DevExpress.ExpressApp.Xpo |
DelayedAttribute, ExplicitLoadingAttribute, XPInstantFeedbackSource, XPServerCollectionSource |
DevExpress.Persistent.Base |
IndexedAttribute, PersistentAliasAttribute |
Configuration Locations
| Setting | File |
|---|---|
EF Core logging (LogTo, EnableSensitiveDataLogging) |
DbContext.OnConfiguring() or Startup.cs |
Model cache (EnableModelCache) |
MySolution.Blazor.Server\Startup.cs or MySolution.Win\Startup.cs |
Blazor tab limits (MaxTabLimit, TabOverflowStrategy) |
MySolution.Blazor.Server\Program.cs (static properties, set before app starts) |
| Data access mode | ModelNodesGeneratorUpdater in MySolution.Module or controller |
Database indexes ([Indexed]) |
Business class declarations in MySolution.Module\BusinessObjects\ |
External Tools
| Tool | Purpose |
|---|---|
XPO Profiler (XpoProfiler.exe) |
Trace XPO SQL queries and object loading (ships with DevExpress installation) |
| EF Core SQL logging | optionsBuilder.LogTo(Console.WriteLine) — see references/efcore-performance.md |
| .NET profiler (dotTrace, PerfView) | CPU and memory profiling for application-layer bottlenecks |
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 · 214 lines · 86 tokens per session scan A 329a96f2db76
devexpress-xaf-performance is a skill published in the GitHub repository DevExpress/agent-skills (66 stars, last pushed 11d ago), licensed MIT. It adds 86 tokens to every session and 2,997 once invoked, about $0.0003 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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