A VSCode extension that provides intelligent autocomplete, validation, and navigation for SST (Serverless Stack) function handlers.
Features
🔍 Smart Handler Autocomplete: Automatically suggests available handler functions when writing SST constructs
📊 Usage Statistics: View handler usage statistics on hover - see where and how often each handler is used
🔗 Go-to-Definition: Navigate directly to handler implementations
⚠️ Real-time Validation: Detect missing files, invalid handler paths, and broken references
🛠️ Code Actions: Quick fixes for common handler issues
Supported SST Constructs
sst.aws.Function - Lambda functions
sst.aws.Cron - Scheduled functions
sst.aws.Queue - Queue subscribers
sst.aws.Bucket - Bucket notifications
sst.aws.ApiGatewayV1 - API routes
Usage Statistics
Hover over any handler path to see:
Usage count - How many times the handler is referenced
Usage locations - Exact files and lines where it's used
Context information - Type of SST construct using the handler
Bundle Size Optimization
This extension uses an optimized build strategy:
TypeScript External: Uses VSCode's built-in TypeScript instead of bundling (~36KB vs several MB)
Smart Loading: Dynamically loads TypeScript at runtime from VSCode's environment
Efficient Bundling: Uses esbuild with external dependencies for minimal size
Bundle Details
Unminified: ~76KB
Minified: ~36KB
Final VSIX: ~14KB
No TypeScript bundled - uses VSCode's copy
Development
# Install dependencies
pnpm install
# Build extension
pnpm build
# Watch mode
pnpm watch
# Run tests
pnpm test
Architecture
The extension is built on top of the sst-analyzer library which provides:
TypeScript AST analysis for handler detection
File system scanning with tsconfig.json support
Validation logic and error reporting
Usage statistics analysis
This modular approach allows the same core logic to be used in both the VSCode extension and CLI tools.
