How to Use This Tool

Build a workflow from step cards, watch the flow diagram redraw as you edit, and export the finished design. Everything runs in your browser; nothing is executed and nothing is sent to a server.

1. Add steps

Click Add step to create a new step. Give it a unique name, write the prompt template, and use {{variable}} placeholders for runtime inputs. Reorder steps with the arrows or drag them, duplicate a step, or remove it with the trash icon. Changes autosave to your browser storage.

2. Pick a model

Open the model picker to search the live models.dev catalog, grouped by provider. Featured chips give one-click access to popular models. Models that do not support temperature disable the slider automatically. If the catalog is unreachable, a small offline list is used instead.

3. Branch and merge

Use the Next steps picker on a step to route it to one or more following steps. Multiple successors create branches; steps with multiple incoming edges are merge points. The flow diagram draws arrows, branch arms, and merges automatically, and flags cycles.

4. Review with a preview run

Fill the Variables across workflow values once, then run the preview. Every step resolves its prompt with your values (including {{stepName.output}} references to earlier steps), and the linter reports unknown variables, unclosed braces, duplicate names, and cycles.

5. Export

Export the workflow as versioned JSON ({ version, exportedAt, title, steps }) and import it back later, or copy it as Markdown for pasting into a team doc. JSON import accepts either a bare array of steps or the wrapped object shape.

Features

• Branching DAG with merge points, not just a linear chain
• Live SVG flow diagram that redraws as you edit; click a node to jump to its editor
• Live model catalog from models.dev with search, provider grouping, and featured chips
• Per-step temperature slider (0-2) that disables for models with fixed sampling
• Variables detected per step with {{name}} regex; step-output references via {{stepName.output}}
• Preview run that resolves every prompt with your variable values and lints the workflow
• Per-step and total token estimates
• Versioned JSON export plus readable Markdown export
• Startup templates (linear chain, classifier branch, summarizer chain)
• Validation with inline errors and undo/redo
• Autosave to localStorage under awb-workflow