Introduction

In the standard conversation flow of DeepSeek Harness, AI-generated content is usually presented as static code snippets or Markdown text blocks. This form has significant usability friction: developers cannot immediately verify interaction logic, form validation, or responsive layouts after generation, and must manually copy code into local build toolchains. In addition, switching between multiple windows increases the risk of context fragmentation.

@goodandready/dsh-live-canvas aims to solve the problems above. It transforms DSH into a standalone front-end development suite, providing in-memory ESM bundling, real-time SSE hot reload, an inline code editor, a time-travel debugger, and 30 dedicated agent tools.

System Requirements

Before use, please ensure your environment meets the following conditions:

  • DeepSeek Harness Version: Supports DSH 0.1.5-alpha.1+ (Native), and is compatible with Legacy DSH Profiles and Minimal / Standalone Profiles.
  • Node.js Version: Requires Node 20 or higher.
  • Navigation Layout: Supports all DSH navigation layouts, with no external dependencies.

Core Features

The plugin provides a complete front-end development workflow, mainly including the following modules:

1. Retool-Style CRUD Management Engine

This is one of the core components of the plugin, allowing complete data management micro-applications to be generated directly in the canvas.

  • Data Grid and Interaction: Supports real-time search, column sorting, and status filtering (such as Active, Pending, Suspended).
  • Form Validation: Provides immediate validation when creating and editing records.
  • Data Persistence: Automatically synchronizes record changes to localStorage, so data still exists after refreshing the page.
  • Data Export: Supports one-click export of table data as a downloadable .csv file.

2. Time-Travel Debugger

This tool (Tool 27) allows developers to trace back through session history.

  • Historical Timeline: Provides a visual timeline slider for browsing historical session snapshots.
  • Snapshot Comparison and Rollback: Can quickly restore to any previous snapshot state without manually operating Git.

3. Visual Development Environment

The plugin integrates modern development tool features to improve development efficiency.

  • Instant Preview: Directly generates interactive preview cards in chat, supporting drag-to-resize height (160px to 800px).
  • Hot Reload: Uses SSE technology to implement real-time code hot updates without refreshing the page.
  • Code Editor: Provides a split view, allowing code to be edited directly inside the canvas.
  • Figma Vector Bridge: Supports fetching vector assets from Figma.

4. Multi-Platform One-Click Deployment

The plugin integrates a deployment engine for static site distribution.

  • Platform Support: Supports Vercel and Cloudflare Pages.
  • Configuration Generation: Automatically generates routing rules (such as vercel.json or _routes.json) and security header configurations (such as _headers).

Typical Usage

By following the steps below, you can complete preparation from development to deployment in DSH:

  1. Generate a CRUD Application: Use the plugin tools to generate a data management interface with search, sorting, and status filtering.
  2. Interaction and Validation: Directly test form validation logic and user interaction flows in the canvas.
  3. Export Data: After confirming that the data structure is correct, use the export function to obtain a .csv file.
  4. Version Rollback: If a rollback is needed during development, drag the timeline slider to restore the previous stable snapshot.
  5. Deployment Readiness: Use the one-click deployment feature to generate static distribution configuration for Vercel or Cloudflare Pages.

Notes

  • The plugin runs with the permissions of the current DSH process.
  • It is recommended to review the source code and license (MIT) before installation.
  • The plugin supports Projects Hub and Recent Sessions management, making it easier for developers to switch between projects.