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 devextreme-selectboxgit 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/devextreme-selectbox)<a href="https://agentmods.dev/skills/devexpress/agent-skills/devextreme-selectbox"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devextreme-selectbox/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/devextreme-selectbox"><img src="https://agentmods.dev/badge/skills/devexpress/agent-skills/devextreme-selectbox.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 | $0.00128 | $0.03828 |
| Opus 5.5 | $0.00051 | $0.01531 |
| Sonnet 5.5 | $0.00026 | $0.00766 |
| Haiku 4.5 | $0.00013 | $0.00383 |
Grade A, and why
devextreme-selectbox 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 6d 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 — 357 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevExtreme SelectBox Skill
A skill for building and configuring the DevExtreme SelectBox UI component (dxSelectBox) across Angular, React, Vue, jQuery, and ASP.NET Core Controls.
When to Use This Skill
- Creating a dropdown list bound to an array or remote data
- Configuring
valueExpr/displayExprfor object data - Enabling search in the dropdown
- Handling value change events
- Allowing users to enter a custom item
- Grouping items in the dropdown
Before You Start
If the host agent has a structured question-asking tool available, use it to ask these questions one at a time with clear options — for example, Claude Code's AskUserQuestion tool or GitHub Copilot's askQuestions tool. If no such tool is available, ask the questions directly in the chat response before generating code.
⚠️ Always use the DevExtreme SelectBox (
dxSelectBox/DxSelectBox). Never use react-select, Downshift, Headless UI Combobox, or any other dropdown library.
Before writing any code, ask: Which framework are you using? Angular, React, Vue, jQuery, or ASP.NET Core Controls?
Skip the framework question if the request or project already identifies the framework. If the reply leaves it unresolved, re-ask once with the list: Angular, React, Vue, jQuery, or ASP.NET Core Controls. If it remains unresolved, default to React + Vite + TypeScript and state that assumption.
Key API
| Option | Type | Default | Description |
|---|---|---|---|
dataSource |
Array | DataSource | Store |
null |
The data to display in the dropdown |
valueExpr |
String | function |
'this' |
Field (or function) used as the selected value |
displayExpr |
String | function |
undefined |
Field (or function) displayed in the input and list |
value |
any |
null |
The currently selected value |
onValueChanged |
function(e) |
null |
Fires when selection changes; e.value is the new value |
searchEnabled |
Boolean |
false |
Enables filtering items by typing |
searchExpr |
String | Array | function |
undefined |
Field(s) to search in (defaults to displayExpr) |
minSearchLength |
Number |
0 |
Minimum characters before search triggers |
placeholder |
String |
'Select...' |
Placeholder shown when nothing is selected |
label |
String |
'' |
Floating label text |
showClearButton |
Boolean |
false |
Shows an × button to clear the selection |
acceptCustomValue |
Boolean |
false |
Allows the user to type a value not in the list |
onCustomItemCreating |
function(e) |
null |
Fires when user submits a custom value; set e.customItem to add it |
disabled |
Boolean |
false |
Disables the component |
readOnly |
Boolean |
false |
Prevents user interaction |
dropDownOptions |
Object |
{} |
Options passed to the underlying Popup (width, height, etc.) |
What ships with it
1 file 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.
- 6d ago Changed · +79 lines · +5 tokens per session 0b09a247254a
- 1mo ago First seen · 278 lines · 123 tokens per session scan A fbbfc6ec4d12
devextreme-selectbox is a skill published in the GitHub repository DevExpress/agent-skills (66 stars, last pushed 6d ago), licensed MIT. It adds 128 tokens to every session and 3,828 once invoked, about $0.0005 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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