Durable Viz
Visualize and build AWS Lambda Durable Functions workflows in VS Code.
- View mode: Parse handler code and render an interactive flowchart.
- Build mode: Design workflows from scratch and generate handler boilerplate.
Supports TypeScript/JavaScript, Python, Java, C# (.NET), Rust, and Go runtimes.
Install
Features
View Mode
- Interactive diagram. See your durable function as a flowchart in a side panel.
- Scroll zoom and click-drag pan.
- Click-to-navigate to source lines.
- Loops.
for, while, and foreach loops that wrap durable calls show the loop body in a dashed box with a next edge back to the loop.
- Auto-refresh on file save.
- Direction toggle (TD/LR), PNG export, source view (Mermaid/JSON).
Build Mode
- Drag-and-drop palette with 15 primitives filtered by language.
- Click-to-connect edges. Conditions auto-label
if/else branches.
- Compound nodes for Parallel/Map with drag-to-nest.
- Code generation in TypeScript, Python, Java, C#, Rust, and Go.
- Mermaid preview, save/load JSON, undo/redo.
Usage
| Mode |
Command |
| View |
Durable Viz: Open Lambda Durable Function Workflow |
| Build |
Durable Viz: Build Workflow Diagram |
A toolbar button also appears in the editor title bar for .ts, .js, .py, .java, .cs, .rs, and .go files.
Supported Languages
| Language |
Handler detection |
SDK |
| TypeScript / JavaScript |
withDurableExecution() |
@aws/durable-execution-sdk-js |
| Python |
@durable_execution decorator |
aws-durable-execution-sdk-python |
| Java |
extends DurableHandler |
aws-durable-execution-sdk-java |
| C# (.NET) |
DurableFunction.WrapAsync or [DurableExecution] |
Amazon.Lambda.DurableExecution |
| Rust |
durable::run(handler) |
aws-durable-execution-sdk |
| Go |
durable.Start(handler) |
aws-durable-execution-sdk-go |
Links
License
MIT
| |
