Imported from TechShady/traffic-analyzer-for-infra (AGENTS.md). Install upstream with npx skills add TechShady/traffic-analyzer-for-infra. Copyright stays with the author.

AI Coding Agent Instructions

DQL - Dynatrace Query Language

Before writing any DQL query, the agent must always use the knowledge base (dql_search tool) to search for relevant DQL documentation, syntax, and examples, whenever the tool is available.

UI Components - Strato

Before using any Strato UI component, the agent must always use the knowledge base tools to search for relevant component documentation and usage examples, whenever the tools are available:

• Use the strato_search tool to search for available Strato components by name or keyword.
• Use the strato_get_component tool to retrieve detailed documentation, props, and code examples for a specific component.
• Use the strato_get_usecase_details tool to get code for specific component use cases and patterns.

Project Overview

This repository contains a Dynatrace App built with the Dynatrace App Toolkit "dt-app", running on Dynatrace AppEngine. Use the App Toolkit during development and CI (dt-app dev, dt-app build, dt-app deploy, dt-app publish).

Core Concepts

Dynatrace Apps

• UI is TypeScript/React using Strato Design System components for consistent Dynatrace UX.
• Backend logic runs inside the Dynatrace JavaScript runtime. Let the app execute backend code, primarily to call external URLs (e.g., third‑party APIs) that shouldn’t be invoked directly from the browser.
• Apps can use Intents for cross-app communication
• Apps can provide Actions and Widgets to extend Dynatrace.

Grail

• Grail stores observability data (logs, metrics, events, traces, business events).
• DQL is used to query Grail.

DQL (Dynatrace Query Language)

DQL is a pipeline-style query language for Grail: you start with a data source (e.g., fetch logs or timeseries for metrics), then add pipe‑separated commands like filter, summarize, sort, and makeTimeseries to transform and aggregate results. Typical patterns include counting events, building time series, and grouping by dimensions (e.g., host or status).

Platform Services

A set of services are available to Dynatrace Apps to read and write data. Every service provides a typescript client sdk to interact with it. Common services include:

• Grail Query Service: Query Dynatrace Grail data using DQL. Prefer using the useDql React hook from @dynatrace-sdk/react-hooks in UI code, but the low‑level client @dynatrace-sdk/client-query is also available.
• Document Service: Store and retrieve json files. Used e.g. for dashboards, can be shared with other users. Use @dynatrace-sdk/client-document to interact with it.
• (User) App State Service: Store and retrieve user‑specific or app‑specific key/value data. Used for caching or user preferences. Use @dynatrace-sdk/client-state to interact with it.

Strato Design System

The Strato Design System is Dynatrace's official design system and component library. It provides React components, design tokens (colors, borders, shadows), and icons to build consistent UIs that align with Dynatrace's look and feel.

Available packages:

• @dynatrace/strato-components — Stable react components. Components here include: Button, ProgressBar, ProgressCircle, Skeleton, SkeletonText, AppRoot, Container, Divider, Flex, Grid, Surface, Heading, Link, List, Paragraph, Strikethrough, Strong, Text, TextEllipsis
• @dynatrace/strato-components-preview — Most components are here, including Charts (TimeseriesChart, HistogramChart, HoneycombChart, SingleValue, PieChart, ...), Content (Accordion, Chip, HealthIndicator, MessageContainer, ...), Editors (CodeEditor, DQLEditor), Filters (FilterBar, FilterField, SegmentSelector, TimeframeSelector), Forms (Checkbox, Radio, Select, Switch, TextInput, ...), Layouts (AppHeader, HelpMenu, InputGroup, Page, TitleBar), Navigation (AppLink, Breadcrumbs, Menu, Tabs), Overlays (Modal, Overlay, Sheet, Tooltip), Tables (DataTable, SimpleTable)
• @dynatrace/strato-design-tokens — design tokens (colors, spacing, typography) for consistent styling.
• @dynatrace/strato-geo — map visualization primitives.
• @dynatrace/strato-icons — Strato icon library.

Working with Table components

When using table components from Strato, prefer DataTable from @dynatrace/strato-components-preview/tables for advanced features like sorting, filtering, pagination, and selection. Use SimpleTable for basic tabular data without interactivity, mostly used for Markdown rendering.

Table API:

• Tables require the data and columns props
• Column definitions must include id, header, and accessor (string path or function)

Importing Strato Components

When importing Strato components, follow these guidelines to ensure optimal bundle size and performance:

1. Never import from @dynatrace/strato-components or @dynatrace/strato-components-preview package root
2. Always import from the specific category subdirectory (e.g., /layouts, /typography, /tables)
3. Wrong: import { Flex, Heading } from "@dynatrace/strato-components";
4. Correct:

   import { Flex } from "@dynatrace/strato-components/layouts";
   import { Heading } from "@dynatrace/strato-components/typography";

TypeScript Definitions: All Strato packages have TypeScript definitions located directly in the package root under each component folder. For example:

• node_modules/@dynatrace/strato-components-preview/forms/select/Select.d.ts - Main Select component
• node_modules/@dynatrace/strato-components-preview/forms/select/SelectOption.d.ts - Select.Option component
• Pattern: node_modules/@dynatrace/strato-components[-preview]/<category>/<component>/<Component>.d.ts

Important: Always check the .d.ts files directly in node_modules/@dynatrace/strato-components[-preview]/ to understand component APIs. Do NOT look for a separate types/ subdirectory.

Client SDKs

Dynatrace provides TypeScript client SDKs to interact with platform services. Each service has its own package, for example: @dynatrace-sdk/client-query, @dynatrace-sdk/client-document, @dynatrace-sdk/client-state. Those packages are autogenerated from the service OpenAPI specs and have the following characteristics:

• Exported clients to call service endpoints, eg. queryClient or documentClient.
• Example:

const result = await queryClient.queryExecute({ body: { query: 'fetch logs | count' }});

Important: Prefer using the higher‑level React hooks from @dynatrace-sdk/react-hooks in UI code, as they encapsulate state management, polling, and error handling.

Other SDKs

• React hooks — @dynatrace-sdk/react-hooks: React hooks for DQL (useDql), documents, app state, settings and other platform services. Prefer using these in UI code. Request and response types match the low‑level client SDKs. Example:

  const { data, error, isLoading } = useDocument({ id: documentId });

-- Common React Hooks: --- useDql(query: string) - Execute DQL queries --- useDocument({ id: string }) - Fetch a single document --- useListDocuments(params) - List all documents (requires document:documents:read scope) --- useAppState({ key: string }) and useUserAppState({ key: string }) - Read app (user) state --- useSetAppState() and useSetUserAppState() - Write app (user) state. Returns an execute function. --- useAppFunction({ name: string, data: any }) - Call backend functions -- All update/set/POST hooks return an execute function that you can call to perform the action.

• Units & formatting — @dynatrace-sdk/units: Convert values to human‑readable strings (e.g., bytes → KiB/MB) and ensure consistent unit formatting across UI and functions.
• App Environment — @dynatrace-sdk/app-environment: Read app/environment context (IDs, URLs, current user) directly in the app
• User Preferences — @dynatrace-sdk/user-preferences: Retrieve the logged‑in user’s theme, language, regional format, and timezone to adapt UI/formatting. Can not be used to store custom user settings. Use the App State service for that.

Development Workflow

Commands (via dt-app CLI)

• Dev Server: npm run start - runs with hot reload, auto-opens browser
• Build: npm run build - outputs to dist/ folder
• Deploy: npm run deploy - deploys to environment in app.config.json

Configuration

• App Metadata: app.config.json defines app name, ID, version, and required scopes
• Environment URL: Set environmentUrl in app.config.json to target Dynatrace environment
• Scopes: Add required permissions to app.config.json scopes array (e.g., storage:logs:read, document:documents:read, document:documents:write, state:app-states:read, state:app-states:write)

Key Dependencies

• @dynatrace/strato-components and -preview: UI component library
• @dynatrace/strato-design-tokens: Design tokens (colors, borders, shadows)
• @dynatrace-sdk/react-hooks: Hooks for Dynatrace APIs (useDql, etc.)
• @dynatrace-sdk/client-*: Query API clients, every service has its own client package

Common Tasks

• Add Route: Update Routes in ui/app/App.tsx and add nav item to ui/app/components/Header.tsx
• Query Data: Use useDql hook with DQL query string (Dynatrace Query Language)
• Style Components: Import from @dynatrace/strato-design-tokens/{colors,borders,box-shadows} for design tokens