JetStart VS Code Extension

The JetStart Kotlin & Compose Snippets extension is designed to give Android developers a fast, React-like scaffolding experience directly in VS Code. It provides robust, package-aware, and import-aware snippets for Kotlin and Jetpack Compose.

Features

• 🚀 Smart Snippets: Quick templates for Classes, ViewModels, Composables, Room Entities, and more.
• 📦 Package Awareness: Automatically detects and inserts the correct package declaration based on your folder structure.
• 📥 Auto-Imports: Automatically adds required imports to the top of the file when you use a snippet.
• 🔍 Compose Import Helper: Quick suggestions for missing Compose and AndroidX imports.

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Installation

Since the extension is currently in beta, you can install it directly by downloading the .vsix package.

1. Download the Extension

Download the latest version of the JetStart extension:

📥 Download JetStart VS Code Extension (.vsix)

2. Install in VS Code

1. Open Visual Studio Code.
2. Go to the Extensions view (Ctrl+Shift+X).
3. Click the More Actions (...) menu in the top-right corner of the Extensions bar.
4. Select Install from VSIX...
5. Locate and select the jetstart-kotlin-snippets.vsix file you just downloaded.
6. Restart VS Code if prompted.

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Common Snippets

Type these prefixes in any .kt file to trigger the snippets:

Prefix	What you get
ktc	Class with auto-detected package name
ktdc	Data class
ktsc	Sealed class (Success/Error/Loading)
ktec	Enum class
ktvm	ViewModel + StateFlow + coroutine scope
kthiltvm	Hilt ViewModel + @Inject
ktrep	Repository class
ktent	Room @Entity
ktdao	Room @Dao
ktdb	Room Database singleton
ktcf	@Composable function
ktcfs	@Composable + remember state
ktprev	@Preview composable
ktscaffold	Full Scaffold + TopAppBar + FAB
ktlazycol	LazyColumn with items
ktlazyr	LazyRow with items
ktlazysgrid	LazyVerticalStaggeredGrid
ktcard	Material3 Card
ktrow / ktcol	Row / Column
ktalertd	AlertDialog
ktbottomsheet	ModalBottomSheet
kttab	TopAppBar
ktnav	NavHost setup
ktstate	var x by remember { mutableStateOf(...) }
ktsflow	MutableStateFlow + StateFlow pair
ktcollect	collectAsState()
ktlaunch / ktsideef / ktdisposable / ktderived	Effects
ktcoro / ktio / ktasync	Coroutines
ktfun / ktsfun / ktef / ktlambda	Functions
ktwhen / ktwhenresult	when expressions

Auto-features

• Smart Package Insertion: Open a new empty .kt file and the package name is auto-inserted based on the directory structure.
• Instant Auto-Imports: Type an identifier like mutableStateOf and the import suggestion appears immediately.
• Deep Support: Works for 150+ Compose/Kotlin identifiers across Room, Hilt, Navigation, Coroutines, and more.

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How it Works (and Automation)

A common question is: Why use a manual import map instead of an official source?

Unlike Android Studio, which builds a heavy local index of all your dependencies (often consuming significant RAM), JetStart's VS Code extension is designed for instant, zero-latency feedback.

1. The "Official" Way: Standard IDEs use the Language Server Protocol (LSP) to scan your Gradle dependencies. While powerful, this can be slow and often fails in complex environments.
2. The JetStart Way: We use a curated high-performance map of over 150 common Compose and Kotlin identifiers. This gives you instant suggestions the moment you type, without waiting for a background indexer.

Automating Updates

To keep this map up-to-date without manual effort, we are working on a Sync Runner script that will:

• Automatically scan the build.gradle classpath.
• Extract public identifiers from AndroidX and Kotlin libraries.
• Regenerate the mapping files for the extension.

This ensures you always have the latest Material3 and Compose symbols without the performance cost of a full IDE indexer.

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Recommended Configuration

For the best experience, we recommend using this extension alongside other Kotlin tools for full IDE features like go-to-definition and linting.

Complementary Extensions

JetStart's extension works perfectly alongside the following popular Kotlin extensions:

• Kotlin Language Server: Provides the core IDE engine (diagnostics, formatting, etc.).
• Kotlin on VSCode (sethjones): A popular extension pack that bundles essential Kotlin tools.

Why use JetStart's extension?
While the extensions above provide great language support, JetStart's extension is uniquely focused on Android/Compose speed:

• Instant Imports: No waiting for the Language Server to index; imports are added instantly.
• Android-First Snippets: Tailored templates for M3 Scaffold, ViewModels, and Room that aren't available in generic Kotlin packs.