The user wants me to build a playable piano keyboard web app with specific requirements:
1. Use the pre-provided tone.min.js (global Tone)
2. Controlled by mouse and computer keys
3. Synthesizes notes with an ADSR envelope
4. Visual key feedback
5. All in a single self-contained index.html file
6. No external resources/CDNs/network requests

I need to:
1. First check what files are in the current directory to confirm tone.min.js exists
2. Create an index.html file with:
   - HTML structure for a piano keyboard
   - CSS styling for the keys and visual feedback
   - JavaScript using Tone.js to create synths with ADSR envelopes
   - Mouse event handlers for clicking keys
   - Keyboard event handlers for computer keys
   - Visual feedback when keys are pressed

Let me start by checking the current directory contents.

The user wants me to build a playable piano keyboard that:
1. Uses the pre-provided tone.min.js (which provides the global Tone object)
2. Is controlled by mouse and computer keys
3. Synthesizes notes with an ADSR envelope
4. Has visual key feedback
5. Should be a single self-contained index.html file
6. Should load tone.min.js from the local filesystem

I need to create a complete HTML file with:
- HTML structure for the piano keyboard
- CSS for styling and visual feedback
- JavaScript using Tone.js to create the synthesizer with ADSR envelope
- Event listeners for both mouse clicks and computer keyboard input
- Visual feedback when keys are pressed

Let me create a comprehensive piano keyboard implementation. I'll use:
- A simple sine wave oscillator with ADSR envelope
- White and black keys layout
- Computer keyboard mapping (QWERTY keys for white keys, number keys for black keys)
- Visual feedback with CSS transitions/animations
- Tone.js for audio synthesis

I'll write the complete index.html file in one go.

The user wants a single-page piano keyboard web app using the provided tone.min.js file. I need to create a complete HTML file with embedded CSS and JavaScript that:

1. Loads tone.min.js locally
2. Creates a playable piano keyboard with both white and black keys
3. Supports mouse interaction (click and drag)
4. Supports computer keyboard keys (QWERTY layout)
5. Uses ADSR envelope for synthesis
6. Provides visual key feedback when keys are pressed
7. Is fully self-contained with no external resources

I've created a comprehensive index.html file that includes:
- A modern gradient background
- A full piano keyboard with 7 white keys and 5 black keys (C major scale from C4 to C5)
- Computer keyboard mapping: QWERTY for white keys, 1-8 for black keys
- Tone.js PolySynth with ADSR envelope (attack: 0.05, decay: 0.2, sustain: 0.3, release: 0.4)
- Reverb effect for richer sound
- Visual feedback with pressed state and key highlighting
- Status display showing current actions
- Responsive design for mobile devices
- All in one self-contained HTML file

The file has been successfully written to /tmp/ws/index.html. Let me verify it's there.

The user wants me to build a single-page web app piano keyboard using the provided tone.min.js file. I need to create a complete, self-contained index.html file with:

1. CSS in a `<style>` tag
2. JavaScript in a `<script>` tag  
3. Load tone.min.js from the local file
4. Include ADSR envelope for the synth
5. Support mouse and keyboard controls
6. Include visual key feedback
7. No external resources - everything must be self-contained

I've created a comprehensive piano keyboard app with:
- A full 2-octave piano (C4 to C6)
- White and black keys with proper positioning
- ADSR envelope (attack: 0.05, decay: 0.2, sustain: 0.3, release: 0.4)
- Mouse click/drag support
- Keyboard mapping (QWERTY for white keys, 1-8 for black keys)
- Visual feedback with pressed state
- Reverb effect for richer sound
- Status display
- Responsive design
- Loading indicator

Let me verify the file was created correctly and check if there are any issues.