API Integration

HAI Build Code Generator exposes a public API that allows other VS Code extensions to programmatically control Cline tasks. This enables powerful integrations and automation workflows.

Overview

The HAI API provides methods to:

Start new coding tasks with optional images
Send messages to active tasks
Simulate button interactions
Control task lifecycle

Getting Started

1. Install the Type Definitions

Copy the type definition file from the HAI Build repository:

cp node_modules/hai-build/src/exports/hai.d.ts ./src/types/

Or create it manually:

// src/types/hai.d.ts
export interface HAIAPI {
  /**
   * Starts a new task with an optional initial message and images.
   * @param task Optional initial task message.
   * @param images Optional array of image data URIs (e.g., "data:image/webp;base64,...").
   */
  startNewTask(task?: string, images?: string[]): Promise<void>

  /**
   * Sends a message to the current task.
   * @param message Optional message to send.
   * @param images Optional array of image data URIs (e.g., "data:image/webp;base64,...").
   */
  sendMessage(message?: string, images?: string[]): Promise<void>

  /**
   * Simulates pressing the primary button in the chat interface.
   */
  pressPrimaryButton(): Promise<void>

  /**
   * Simulates pressing the secondary button in the chat interface.
   */
  pressSecondaryButton(): Promise<void>
}

2. Add Extension Dependency

Ensure HAI Build is activated before your extension by adding it to package.json:

{
  "name": "your-extension",
  "extensionDependencies": [
    "presidio-inc.hai-build-code-generator"
  ]
}

3. Access the API

Get the API instance in your extension’s activate function:

import * as vscode from 'vscode'
import type { HAIAPI } from './types/hai'

export async function activate(context: vscode.ExtensionContext) {
  const clineExtension = vscode.extensions.getExtension<HAIAPI>(
    'presidio-inc.hai-build-code-generator'
  )

  if (!clineExtension?.isActive) {
    throw new Error('HAI Build extension is not activated')
  }

  const cline = clineExtension.exports

  if (!cline) {
    throw new Error('HAI API is not available')
  }

  // Now you can use the API
  await cline.startNewTask('Hello, HAI! Let\'s build something amazing...')
}

API Reference

startNewTask()

Starts a new task with an optional initial message and images. Signature:

startNewTask(task?: string, images?: string[]): Promise<void>

Parameters:

task (optional): Initial task description
images (optional): Array of image data URIs in base64 format

Example:

// Start a simple task
await cline.startNewTask('Create a React component for a login form')

// Start without a prompt (opens chat interface)
await cline.startNewTask()

// Start with images
const imageData = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA...'
await cline.startNewTask(
  'Implement this design',
  [imageData]
)

Behavior:

Clears any existing task
Updates the webview state
Initializes a new task with the provided prompt
Opens the HAI Build sidebar if not already visible

sendMessage()

Sends a message to the currently active task. Signature:

sendMessage(message?: string, images?: string[]): Promise<void>

Parameters:

message (optional): Message text to send
images (optional): Array of image data URIs

Example:

// Send a follow-up message
await cline.sendMessage('Can you add error handling?')

// Send with images
await cline.sendMessage(
  'Update the UI to match this mockup',
  [imageDataUri]
)

// Send empty message (continues conversation)
await cline.sendMessage()

Error Handling: If no task is active, logs an error but does not throw:

// Safe to call even without active task
await cline.sendMessage('Hello') // Logs error if no task

pressPrimaryButton()

Simulates clicking the primary button in the chat interface (e.g., “Save”, “Proceed”). Signature:

pressPrimaryButton(): Promise<void>

Example:

// Auto-approve an action
await cline.pressPrimaryButton()

Use Cases:

Auto-approve file changes in automation workflows
Proceed with task execution programmatically
Confirm user actions in headless scenarios

pressSecondaryButton()

Simulates clicking the secondary button (e.g., “Reject”, “Cancel”). Signature:

pressSecondaryButton(): Promise<void>

Example:

// Reject a proposed change
await cline.pressSecondaryButton()

Usage Patterns

Pattern 1: Task Automation

Create automated workflows that run Cline tasks:

import * as vscode from 'vscode'
import type { HAIAPI } from './types/hai'

class TaskAutomation {
  constructor(private cline: HAIAPI) {}

  async runDailyTasks() {
    // Update documentation
    await this.cline.startNewTask(
      'Update the CHANGELOG.md with recent commits'
    )

    // Wait for completion (implement your own logic)
    await this.waitForCompletion()

    // Run tests
    await this.cline.startNewTask('Run the test suite and fix any failures')
  }

  private async waitForCompletion(): Promise<void> {
    // Implement based on your needs
    // Could watch file changes, listen to events, etc.
  }
}

Pattern 2: Context-Aware Commands

Create VS Code commands that pass context to Cline:

vscode.commands.registerCommand('myext.fixProblems', async () => {
  const editor = vscode.window.activeTextEditor
  if (!editor) return

  const diagnostics = vscode.languages.getDiagnostics(editor.document.uri)
  const problems = diagnostics
    .map(d => `${d.message} at line ${d.range.start.line + 1}`)
    .join('\n')

  await cline.startNewTask(
    `Fix these problems in ${editor.document.fileName}:\n${problems}`
  )
})

Pattern 3: Screenshot-Based Tasks

Capture screenshots and send to Cline:

import * as fs from 'fs'

async function implementFromScreenshot(screenshotPath: string) {
  const imageBuffer = fs.readFileSync(screenshotPath)
  const base64 = imageBuffer.toString('base64')
  const dataUri = `data:image/png;base64,${base64}`

  await cline.startNewTask(
    'Implement the UI shown in this screenshot',
    [dataUri]
  )
}

Pattern 4: Interactive Approval Flow

Implement custom approval logic:

class ApprovalHandler {
  constructor(private cline: HAIAPI) {}

  async processTaskWithApproval(task: string) {
    await this.cline.startNewTask(task)

    // Wait for user decision
    const approved = await vscode.window.showQuickPick(
      ['Approve', 'Reject'],
      { placeHolder: 'Review the proposed changes' }
    )

    if (approved === 'Approve') {
      await this.cline.pressPrimaryButton()
    } else {
      await this.cline.pressSecondaryButton()
    }
  }
}

Pattern 5: Git Integration

Integrate with git workflows:

import { execSync } from 'child_process'

async function reviewCurrentBranch() {
  const diff = execSync('git diff --staged').toString()
  
  await cline.startNewTask(
    `Review these staged changes and suggest improvements:\n\n${diff}`
  )
}

async function generateCommitMessage() {
  const diff = execSync('git diff --cached').toString()
  
  await cline.startNewTask(
    `Generate a conventional commit message for these changes:\n\n${diff}`
  )
}

Complete Integration Example

Here’s a full extension that integrates with HAI Build:

import * as vscode from 'vscode'
import type { HAIAPI } from './types/hai'

export async function activate(context: vscode.ExtensionContext) {
  // Get HAI Build API
  const clineExtension = vscode.extensions.getExtension<HAIAPI>(
    'presidio-inc.hai-build-code-generator'
  )

  if (!clineExtension?.isActive) {
    vscode.window.showErrorMessage('HAI Build extension not found')
    return
  }

  const cline = clineExtension.exports

  // Register commands
  context.subscriptions.push(
    vscode.commands.registerCommand('myext.refactorFile', async () => {
      const editor = vscode.window.activeTextEditor
      if (!editor) return

      await cline.startNewTask(
        `Refactor ${editor.document.fileName} to improve code quality`
      )
    })
  )

  context.subscriptions.push(
    vscode.commands.registerCommand('myext.addTests', async () => {
      const editor = vscode.window.activeTextEditor
      if (!editor) return

      await cline.startNewTask(
        `Add comprehensive unit tests for ${editor.document.fileName}`
      )
    })
  )

  context.subscriptions.push(
    vscode.commands.registerCommand('myext.explainCode', async () => {
      const editor = vscode.window.activeTextEditor
      if (!editor) return

      const selection = editor.document.getText(editor.selection)
      if (!selection) return

      await cline.sendMessage(
        `Explain this code:\n\n\`\`\`\n${selection}\n\`\`\``
      )
    })
  )

  vscode.window.showInformationMessage('HAI Build integration active')
}

export function deactivate() {}

package.json:

{
  "name": "hai-build-integration",
  "displayName": "HAI Build Integration",
  "version": "1.0.0",
  "engines": {
    "vscode": "^1.80.0"
  },
  "extensionDependencies": [
    "presidio-inc.hai-build-code-generator"
  ],
  "activationEvents": [
    "onStartupFinished"
  ],
  "contributes": {
    "commands": [
      {
        "command": "myext.refactorFile",
        "title": "Refactor with HAI"
      },
      {
        "command": "myext.addTests",
        "title": "Add Tests with HAI"
      },
      {
        "command": "myext.explainCode",
        "title": "Explain with HAI"
      }
    ]
  }
}

Best Practices

Error Handling

Always check if the extension and API are available:

const clineExt = vscode.extensions.getExtension<HAIAPI>(
  'presidio-inc.hai-build-code-generator'
)

if (!clineExt) {
  vscode.window.showErrorMessage('HAI Build not installed')
  return
}

if (!clineExt.isActive) {
  await clineExt.activate()
}

const cline = clineExt.exports
if (!cline) {
  vscode.window.showErrorMessage('HAI API not available')
  return
}

Image Data URIs

Ensure images are properly encoded:

import * as fs from 'fs/promises'
import * as path from 'path'

async function loadImageAsDataUri(filePath: string): Promise<string> {
  const buffer = await fs.readFile(filePath)
  const ext = path.extname(filePath).slice(1)
  const mimeType = ext === 'png' ? 'image/png' : 'image/jpeg'
  const base64 = buffer.toString('base64')
  return `data:${mimeType};base64,${base64}`
}

Task State Management

Keep track of active tasks to avoid conflicts:

class TaskManager {
  private activeTask: boolean = false

  async startTask(cline: HAIAPI, task: string) {
    if (this.activeTask) {
      const proceed = await vscode.window.showWarningMessage(
        'A task is already active. Start a new one?',
        'Yes', 'No'
      )
      if (proceed !== 'Yes') return
    }

    await cline.startNewTask(task)
    this.activeTask = true
  }
}

Troubleshooting

Extension Not Found

if (!clineExtension) {
  vscode.window.showErrorMessage(
    'HAI Build not installed. Install from the marketplace.'
  )
}

API Not Available

if (!cline) {
  console.error('HAI API exports are undefined')
  // Check if extension activated correctly
  await clineExtension.activate()
}

Task Not Responding

If sendMessage() doesn’t work, ensure a task is active:

await cline.startNewTask() // Start task first
await cline.sendMessage('Your message') // Then send message

Get Started

Core Features

Configuration

Usage Guides

Advanced

API Integration

API Integration

Overview

Getting Started

1. Install the Type Definitions

2. Add Extension Dependency

3. Access the API

API Reference

startNewTask()

sendMessage()

pressPrimaryButton()

pressSecondaryButton()

Usage Patterns

Pattern 1: Task Automation

Pattern 2: Context-Aware Commands

Pattern 3: Screenshot-Based Tasks

Pattern 4: Interactive Approval Flow

Pattern 5: Git Integration

Complete Integration Example

Best Practices

Error Handling

Image Data URIs

Task State Management

Troubleshooting

Extension Not Found

API Not Available

Task Not Responding

Next Steps

CLI Usage

Custom Experts

Build docs developers (and LLMs) love

Get Started

Core Features

Configuration

Usage Guides

Advanced

​API Integration

​Overview

​Getting Started

​1. Install the Type Definitions

​2. Add Extension Dependency

​3. Access the API

​API Reference

​startNewTask()

​sendMessage()

​pressPrimaryButton()

​pressSecondaryButton()

​Usage Patterns

​Pattern 1: Task Automation

​Pattern 2: Context-Aware Commands

​Pattern 3: Screenshot-Based Tasks

​Pattern 4: Interactive Approval Flow

​Pattern 5: Git Integration

​Complete Integration Example

​Best Practices

​Error Handling

​Image Data URIs

​Task State Management

​Troubleshooting

​Extension Not Found

​API Not Available

​Task Not Responding

​Next Steps

CLI Usage

Custom Experts

Build docs developers (and LLMs) love

API Integration

Overview

Getting Started

1. Install the Type Definitions

2. Add Extension Dependency

3. Access the API

API Reference

startNewTask()

sendMessage()

pressPrimaryButton()

pressSecondaryButton()

Usage Patterns

Pattern 1: Task Automation

Pattern 2: Context-Aware Commands

Pattern 3: Screenshot-Based Tasks

Pattern 4: Interactive Approval Flow

Pattern 5: Git Integration

Complete Integration Example

Best Practices

Error Handling

Image Data URIs

Task State Management

Troubleshooting

Extension Not Found

API Not Available

Task Not Responding

Next Steps