AutoFillIn - Browser Form Automation Skill

Trigger Command: autofillin

An intelligent automation skill that fills web forms, uploads files/folders to correct positions, and handles complex multi-field submissions with persistent login support.

What's New in v1.2.0

• Enhanced Error Handling: Graceful error recovery with detailed messages
• Consolidated Configuration: Merged mcp-config into SKILL.md
• Improved Robustness: Better port conflict handling and process management
• Cross-platform Fixes: Improved Windows/Linux compatibility

Changelog

Version	Changes
v1.2.0	Enhanced error handling, consolidated config, improved robustness
v1.1.0	Added Playwright support, session persistence, folder upload
v1.0.0	Initial release with Chrome debug mode

Features

• Navigate to any web form URL
• Auto-fill text fields, textareas, dropdowns
• Upload files/folders to correct form positions
• Persistent login via saved browser storage
• Wait for manual confirmation before submission
• Support for multi-file uploads with position mapping
• Graceful error recovery

Quick Setup

# 1. Install Playwright browsers
npx playwright install chromium

# 2. First-time login (saves session for reuse)
npx playwright open --save-storage=~/.playwright-auth.json "https://your-target-site.com"
# Login manually in the browser that opens, then close it

# 3. Future runs will auto-login using saved session
npx playwright open --load-storage=~/.playwright-auth.json "https://your-target-site.com"

MCP Configuration

Add to your MCP settings (Claude Code, OpenCode, etc.):

{
  "mcpServers": {
    "playwright": {
      "command": "npx",
      "args": ["-y", "@anthropic-ai/mcp-server-playwright"]
    },
    "filesystem": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-filesystem", "/"]
    }
  }
}

Environment variables for shell integration:

export CHROME_DEBUG_PORT=9222
export CHROME_USER_DATA_DIR="$HOME/.chrome-autofillin"

Browser Automation Options

Option 1: Playwright CLI (Recommended for OAuth sites)

# First login - saves session
npx playwright open --save-storage=~/.playwright-auth.json "https://molthub.com/upload"

# Subsequent uses - loads saved session
npx playwright open --load-storage=~/.playwright-auth.json "https://molthub.com/upload"

Advantages:

• No "unsafe browser" blocks from Google/GitHub OAuth
• Session persistence across runs
• Works with MCP browser tools

Option 2: Chrome Debug Mode (For non-OAuth sites)

# Start Chrome with debug port
./scripts/start-chrome.sh "https://example.com/form"

# With your default Chrome profile (keeps existing logins)
./scripts/start-chrome.sh --use-default-profile "https://example.com/form"

Note: Chrome debug mode with custom --user-data-dir is blocked by Google OAuth. Use Playwright for sites requiring Google/GitHub login.

Usage Examples

Basic Form Filling

autofillin https://example.com/form
- Fill "Name" field with "John Doe"
- Fill "Email" field with "john@example.com"
- Upload resume.pdf to file input

MoltHub Skill Upload

autofillin https://molthub.com/upload

Form Data:
- Slug: autofillin
- Display name: AutoFillIn - Browser Form Automation Skill
- Version: 1.2.0
- Tags: automation, browser, form, playwright, mcp
- Changelog: v1.2.0 - Enhanced error handling, consolidated config

Upload:
- Folder: ~/clawd/skills/autofillin/

[WAIT FOR MANUAL CONFIRMATION TO PUBLISH]

Multi-file Upload with Position Mapping

autofillin https://example.com/document-upload

Files to upload:
- Position 1 (ID Document): ~/documents/id_card.pdf
- Position 2 (Proof of Address): ~/documents/utility_bill.pdf
- Position 3 (Photo): ~/photos/headshot.jpg

[WAIT FOR MANUAL CONFIRMATION]

Workflow

1. BROWSER SETUP
   - Check for saved session (~/.playwright-auth.json)
   - Launch Playwright Chromium with session
   - Or prompt for one-time login if no session exists

2. NAVIGATION & LOGIN
   - Navigate to target URL
   - Detect if login is required
   - If login needed: Fill username, prompt for password, save session

3. PAGE ANALYSIS
   - Take accessibility snapshot
   - Identify all form fields
   - Map field labels to input elements

4. AUTO-FILL PHASE
   - Fill text fields using fill() or fill_form()
   - Select dropdown options
   - Upload files/folders via upload_file()

5. CONFIRMATION PHASE
   - Display summary of filled data
   - WAIT FOR MANUAL CONFIRMATION
   - User reviews and clicks Submit/Publish

MCP Tools Used

Tool	Purpose
take_snapshot	Get page accessibility tree
fill	Fill single form field
fill_form	Fill multiple fields at once
upload_file	Upload file or folder
browser_click	Click buttons
evaluate_script	Run JavaScript
navigate_page	Navigate to URLs

Credential Management

Safe Storage (Recommended)

# Use macOS Keychain
security add-generic-password -a "github" -s "autofillin" -w "your-password"
security find-generic-password -a "github" -s "autofillin" -w

# Use Linux secret-tool
secret-tool store --label="autofillin-github" service autofillin username github

# Use Windows Credential Manager
cmdkey /add:autofillin-github /user:github /pass:your-password

Session Persistence

Sessions saved to ~/.playwright-auth.json include cookies, localStorage, and sessionStorage.

Error Handling

Error	Cause	Solution
Unsafe browser	Google OAuth blocked	Use Playwright instead of Chrome debug
Login required	Session expired	Run with --save-storage
Element not found	Page changed	Take new snapshot
Upload failed	Wrong file type	Check webkitdirectory
Port in use	Another Chrome instance	Script auto-kills conflicting process
Chrome not found	Not installed	Run setup-env.sh

Troubleshooting

Chrome won't start with debug mode

# Check if port is in use
lsof -i:9222

# Kill existing processes
pkill -f "remote-debugging-port=9222"

# Retry
./scripts/start-chrome.sh "https://example.com"

Session not persisting

# Verify auth file exists
ls -la ~/.playwright-auth.json

# Re-authenticate
npx playwright open --save-storage=~/.playwright-auth.json "https://target-site.com"

File upload not working

• Ensure file path is absolute
• Check file permissions: ls -la /path/to/file
• For folder uploads, verify the input has webkitdirectory attribute

Files in This Skill

autofillin/
├── SKILL.md              # This documentation (includes MCP config)
└── scripts/
    ├── setup-env.sh      # Environment setup (cross-platform)
    ├── start-chrome.sh   # Chrome debug launcher
    └── autofillin.sh     # Main orchestrator with error handling

Author

• GitHub: @leohan123123

License

MIT