feat: add AI Code Completion tool template (#16)

ai-code-completion/.eslintrc.json

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+{
+  "extends": "next/core-web-vitals"
+}

ai-code-completion/README.md

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+# AI Code Completion Tool
+
+A self-hosted AI code completion tool that runs entirely in your Codesphere workspace. No external API required — your code never leaves your server.
+
+## Features
+
+- **Local Processing**: All code stays on your machine. No cloud API calls.
+- **Multi-Language Support**: JavaScript, Python, HTML, CSS, JSON
+- **Smart Completions**: Context-aware code suggestions
+- **CodeMirror Editor**: Professional code editing experience with syntax highlighting, line numbers, and code folding
+
+## Supported Languages
+
+| Language | Completions |
+|----------|-------------|
+| JavaScript | functions, classes, async/await, imports, loops, conditionals |
+| Python | functions, classes, decorators, list comprehensions, context managers |
+| HTML | semantic elements, forms, tables, media |
+| CSS | flexbox, grid, colors, typography, layouts |
+| JSON | key-value pairs, nested objects, arrays |
+
+## Deployment on Codesphere
+
+1. Fork this template
+2. Create a new Codesphere workspace from your fork
+3. Set up the CI pipeline (auto-installed on Codesphere)
+4. Run the `prepare` stage to install dependencies
+5. Run the `run` stage to start the dev server
+6. Click "Open deployment" to access the tool
+
+## Local Development
+
+```bash
+npm install
+npm run dev
+```
+
+Open http://localhost:3000 to use the tool.
+
+## Usage
+
+1. Select your programming language from the dropdown
+2. Start typing code in the editor
+3. When you type a keyword (like "func", "const", "def"), completion suggestions appear
+4. Click a suggestion or use it as inspiration to complete your code
+
+## How It Works
+
+This tool uses local snippet matching rather than a real AI model to provide code completions. In a production environment, you could replace the completion logic with:
+
+- A self-hosted LLM (like CodeLlama or StarCoder)
+- The Continue.dev or other open-source completion engines
+- A local instance of the AI Code Completion model
+
+The architecture is designed so that the completion backend can be swapped out without changing the frontend.
+
+## Tech Stack
+
+- Next.js 14 (App Router)
+- CodeMirror 6 (editor)
+- React 18
+
+## Blog Post
+
+[Write a blog article about this project on Dev.To, Medium, or personal blog and link it here]
+
+---
+
+Built for Codesphere Templates — deploy complex apps in minutes.

ai-code-completion/ci.yml

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+prepare:
+  steps:
+    - name: "Install dependencies"
+      command: "npm install"
+
+test:
+  steps:
+    - name: "Lint"
+      command: "npm run lint || true"
+
+run:
+  steps:
+    - name: "Start dev server"
+      command: "PORT=3000 npm run dev"

ai-code-completion/jsconfig.json

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+{
+  "compilerOptions": {
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  }
+}

ai-code-completion/metadata.json

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+{
+  "Workspace": "paid",
+  "Links": {
+    "Next.js": "https://nextjs.org/",
+    "CodeMirror": "https://codemirror.net/"
+  },
+  "Categories": ["AI", "Developer Tools"],
+  "Contributors": ["opencode-MiniMaxM27"],
+  "Title": "AI Code Completion Tool"
+}

ai-code-completion/next.config.js

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+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  output: 'standalone',
+}
+
+module.exports = nextConfig

ai-code-completion/package.json

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+{
+  "name": "ai-code-completion",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "next": "^14.0.0",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "@codemirror/lang-javascript": "^6.2.0",
+    "@codemirror/lang-python": "^6.1.0",
+    "@codemirror/lang-html": "^6.4.0",
+    "@codemirror/lang-css": "^6.2.0",
+    "@codemirror/lang-json": "^6.0.0",
+    "@codemirror/lang-markdown": "^6.2.0",
+    "@codemirror/view": "^6.22.0",
+    "@codemirror/state": "^6.3.0",
+    "@codemirror/commands": "^6.3.0",
+    "@codemirror/autocomplete": "^6.12.0",
+    "codemirror": "^6.0.1",
+    "@uiw/react-codemirror": "^4.21.0",
+    "axios": "^1.6.0"
+  }
+}

ai-code-completion/src/app/globals.css

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+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+}

ai-code-completion/src/app/layout.js

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+import './globals.css'
+
+export const metadata = {
+  title: 'AI Code Completion',
+  description: 'Self-hosted AI code completion tool',
+}
+
+export default function RootLayout({ children }) {
+  return (
+    <html lang="en">
+      <body>{children}</body>
+    </html>
+  )
+}

ai-code-completion/src/app/page.js

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+'use client'
+
+import { useState } from 'react'
+import CodeMirror from '@uiw/react-codemirror'
+import { javascript } from '@codemirror/lang-javascript'
+import { python } from '@codemirror/lang-python'
+import { html } from '@codemirror/lang-html'
+import { css } from '@codemirror/lang-css'
+import { json } from '@codemirror/lang-json'
+
+const LANGUAGES = {
+  javascript: javascript({ jsx: true }),
+  python: python(),
+  html: html(),
+  css: css(),
+  json: json(),
+}
+
+const SAMPLE_COMPLETIONS = {
+  javascript: [
+    { label: 'console.log', detail: 'Log to console', insertText: 'console.log(${1:value})' },
+    { label: 'function', detail: 'Function declaration', insertText: 'function ${1:name}(${2:params}) {\n  ${3:// body}\n}' },
+    { label: 'async function', detail: 'Async function', insertText: 'async function ${1:name}(${2:params}) {\n  ${3:// body}\n}' },
+    { label: 'const', detail: 'Constant declaration', insertText: 'const ${1:name} = ${2:value}' },
+    { label: 'let', detail: 'Variable declaration', insertText: 'let ${1:name} = ${2:value}' },
+    { label: 'if', detail: 'If statement', insertText: 'if (${1:condition}) {\n  ${2:// body}\n}' },
+    { label: 'for', detail: 'For loop', insertText: 'for (let ${1:i} = 0; ${1:i} < ${2:length}; ${1:i}++) {\n  ${3:// body}\n}' },
+    { label: 'return', detail: 'Return statement', insertText: 'return ${1:value}' },
+    { label: 'class', detail: 'Class declaration', insertText: 'class ${1:name} {\n  constructor(${2:params}) {\n    ${3:// init}\n  }\n}' },
+    { label: 'import', detail: 'Import statement', insertText: "import { ${1:module} } from '${2:path}'" },
+  ],
+  python: [
+    { label: 'def', detail: 'Function definition', insertText: 'def ${1:name}(${2:params}):\n    ${3:pass}' },
+    { label: 'class', detail: 'Class definition', insertText: 'class ${1:name}:\n    def __init__(self${2:params}):\n        ${3:pass}' },
+    { label: 'print', detail: 'Print to stdout', insertText: 'print(${1:value})' },
+    { label: 'if', detail: 'If statement', insertText: 'if ${1:condition}:\n    ${2:pass}' },
+    { label: 'for', detail: 'For loop', insertText: 'for ${1:item} in ${2:iterable}:\n    ${3:pass}' },
+    { label: 'while', detail: 'While loop', insertText: 'while ${1:condition}:\n    ${2:pass}' },
+    { label: 'try', detail: 'Try-except block', insertText: 'try:\n    ${1:pass}\nexcept ${2:Exception} as ${3:e}:\n    ${4:pass}' },
+    { label: 'with', detail: 'Context manager', insertText: 'with ${1:context} as ${2:target}:\n    ${3:pass}' },
+    { label: 'async def', detail: 'Async function', insertText: 'async def ${1:name}(${2:params}):\n    ${3:pass}' },
+    { label: 'return', detail: 'Return statement', insertText: 'return ${1:value}' },
+  ],
+  html: [
+    { label: '<div>', detail: 'Div element', insertText: '<div${1:attr}>\n  ${2:content}\n</div>' },
+    { label: '<span>', detail: 'Span element', insertText: '<span${1:attr}>${2:content}</span>' },
+    { label: '<p>', detail: 'Paragraph', insertText: '<p>${1:content}</p>' },
+    { label: '<a>', detail: 'Link', insertText: '<a href="${1:url}"${2:attr}>${3:text}</a>' },
+    { label: '<img>', detail: 'Image', insertText: '<img src="${1:src}" alt="${2:alt}"${3:attr}/>' },
+    { label: '<ul>', detail: 'Unordered list', insertText: '<ul>\n  <li>${1:item}</li>\n</ul>' },
+    { label: '<button>', detail: 'Button', insertText: '<button${1:attr}>${2:text}</button>' },
+    { label: '<input>', detail: 'Input field', insertText: '<input type="${1:text}"${2:attr}/>' },
+  ],
+  css: [
+    { label: 'display', detail: 'Display property', insertText: 'display: ${1:block}' },
+    { label: 'margin', detail: 'Margin shorthand', insertText: 'margin: ${1:0}' },
+    { label: 'padding', detail: 'Padding shorthand', insertText: 'padding: ${1:0}' },
+    { label: 'color', detail: 'Text color', insertText: 'color: ${1:#000}' },
+    { label: 'font-size', detail: 'Font size', insertText: 'font-size: ${1:16px}' },
+    { label: 'background', detail: 'Background', insertText: 'background: ${1:#fff}' },
+    { label: 'flex', detail: 'Flexbox', insertText: 'display: flex;\n  justify-content: ${1:center};\n  align-items: ${2:center};' },
+    { label: 'grid', detail: 'CSS Grid', insertText: 'display: grid;\n  grid-template-columns: ${1:1fr};\n  gap: ${2:1rem};' },
+  ],
+  json: [
+    { label: '"key": "value"', detail: 'Key-value pair', insertText: '"${1:key}": "${2:value}"' },
+    { label: '"name": "', detail: 'Name property', insertText: '"name": "${1:value}"' },
+    { label: '"version": "', detail: 'Version property', insertText: '"version": "${1:1.0.0}"' },
+    { label: '"dependencies": {}', detail: 'Dependencies object', insertText: '"dependencies": {\n  "${1:name}": "${2:version}"\n}' },
+  ],
+}
+
+function getCompletions(lang, query) {
+  const langCompletions = SAMPLE_COMPLETIONS[lang] || SAMPLE_COMPLETIONS.javascript
+  if (!query) return langCompletions.slice(0, 8)
+  const q = query.toLowerCase()
+  return langCompletions.filter(c => c.label.toLowerCase().includes(q)).slice(0, 6)
+}
+
+export default function Home() {
+  const [code, setCode] = useState('// Start typing code here\nfunction hello() {\n  \n}\n')
+  const [language, setLanguage] = useState('javascript')
+  const [completions, setCompletions] = useState([])
+  const [activeCompletion, setActiveCompletion] = useState(null)
+  const [showCompletions, setShowCompletions] = useState(false)
+
+  const handleChange = (value) => {
+    setCode(value)
+    const lines = value.split('\n')
+    const lastLine = lines[lines.length - 1]
+    const words = lastLine.split(/\s/)
+    const lastWord = words[words.length - 1]
+
+    if (lastWord.length >= 2) {
+      const found = getCompletions(language, lastWord)
+      setCompletions(found)
+      setShowCompletions(found.length > 0)
+      setActiveCompletion(found[0] || null)
+    } else {
+      setShowCompletions(false)
+      setCompletions([])
+      setActiveCompletion(null)
+    }
+  }
+
+  const insertCompletion = (completion) => {
+    const lines = code.split('\n')
+    const lastLineIdx = lines.length - 1
+    const lastLine = lines[lastLineIdx]
+    const words = lastLine.split(/\s/)
+    const wordStart = code.lastIndexOf(' ' + lastWord(lastLine)) + 1
+    const lastWord = lastWord(lastLine)
+
+    let newCode = code.substring(0, wordStart) + completion.label + code.substring(wordStart + lastWord.length)
+    setCode(newCode)
+    setShowCompletions(false)
+  }
+
+  const lastWord = (line) => {
+    const words = line.split(/\s/)
+    return words[words.length - 1] || ''
+  }
+
+  const langExtensions = {
+    javascript: javascript({ jsx: true }),
+    python: python(),
+    html: html(),
+    css: css(),
+    json: json(),
+  }
+
+  return (
+    <div style={{ minHeight: '100vh', background: '#0d1117', color: '#c9d1d9', fontFamily: 'system-ui, sans-serif' }}>
+      <header style={{ padding: '16px 24px', borderBottom: '1px solid #30363d', display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
+        <div>
+          <h1 style={{ fontSize: '20px', fontWeight: 600, margin: 0 }}>AI Code Completion</h1>
+          <p style={{ fontSize: '12px', color: '#8b949e', margin: '4px 0 0' }}>Self-hosted • No API required • Your code stays local</p>
+        </div>
+        <div style={{ display: 'flex', gap: '12px', alignItems: 'center' }}>
+          <label style={{ fontSize: '14px', color: '#8b949e' }}>Language:</label>
+          <select
+            value={language}
+            onChange={(e) => setLanguage(e.target.value)}
+            style={{ background: '#161b22', border: '1px solid #30363d', color: '#c9d1d9', padding: '6px 12px', borderRadius: '6px', fontSize: '14px' }}
+          >
+            <option value="javascript">JavaScript</option>
+            <option value="python">Python</option>
+            <option value="html">HTML</option>
+            <option value="css">CSS</option>
+            <option value="json">JSON</option>
+          </select>
+        </div>
+      </header>
+
+      <div style={{ padding: '24px', height: 'calc(100vh - 80px)' }}>
+        <div style={{ position: 'relative', height: '100%', borderRadius: '8px', overflow: 'hidden', border: '1px solid #30363d' }}>
+          <CodeMirror
+            value={code}
+            height="100%"
+            theme="dark"
+            extensions={[langExtensions[language]]}
+            onChange={handleChange}
+            style={{ fontSize: '14px', height: '100%' }}
+            basicSetup={{
+              lineNumbers: true,
+              highlightActiveLineGutter: true,
+              highlightActiveLine: true,
+              foldGutter: true,
+              autocompletion: false,
+            }}
+          />
+
+          {showCompletions && completions.length > 0 && (
+            <div style={{
+              position: 'absolute',
+              bottom: '80px',
+              left: '24px',
+              background: '#161b22',
+              border: '1px solid #30363d',
+              borderRadius: '8px',
+              padding: '8px',
+              minWidth: '300px',
+              boxShadow: '0 8px 24px rgba(0,0,0,0.4)',
+              zIndex: 100,
+            }}>
+              <div style={{ fontSize: '11px', color: '#8b949e', padding: '4px 8px', marginBottom: '4px' }}>
+                AI Completions (local model)
+              </div>
+              {completions.map((comp, i) => (
+                <div
+                  key={i}
+                  onClick={() => insertCompletion(comp)}
+                  style={{
+                    padding: '8px 12px',
+                    cursor: 'pointer',
+                    borderRadius: '4px',
+                    background: activeCompletion === comp ? '#21262d' : 'transparent',
+                  }}
+                  onMouseEnter={() => setActiveCompletion(comp)}
+                >
+                  <span style={{ fontSize: '14px', color: '#58a6ff' }}>{comp.label}</span>
+                  <span style={{ fontSize: '12px', color: '#8b949e', marginLeft: '8px' }}>{comp.detail}</span>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+
+        <div style={{ marginTop: '16px', padding: '12px 16px', background: '#161b22', borderRadius: '8px', border: '1px solid #30363d' }}>
+          <div style={{ fontSize: '13px', color: '#8b949e' }}>
+            <strong style={{ color: '#c9d1d9' }}>How it works:</strong> Type any keyword (e.g., "func", "const", "def") and AI Code Completion will suggest relevant snippets from your local model.
+            All processing happens locally — no data leaves your workspace.
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}