Claude Code doesn't see pasted prompt

Bug Description

I pasted a somewhat long prompt (see below) and Claude Code couldn't see it:

❯ [Pasted text #2 +102 lines] ● I see you've pasted some text. Could you share what you'd like me to help you with? I can see there's pasted content but I need to see what it contains to assist you.

Environment Info

• Platform: Windows 11 24H2
• Terminal: Windows Terminal 1.23
• Version: 2.1.29
• Feedback ID: c84800ce-ea78-4c27-8f75-517d02c15ea8

Errors

[]

Here is my prompt:

Create a single self-contained HTML5 file (no external assets, no CDN) that renders beautiful generative art.

GOALS


- Produce striking, gallery-quality generative art on an HTML5 <canvas>.

- Must be a single file: all HTML/CSS/JS inline.

- Must run offline.

- Must look good at any window size and on high-DPI screens.

- Must be performant (aim for 60fps if animated; avoid heavy per-pixel loops unless optimized).

- Include a deterministic PRNG with a user-provided seed so the same seed reproduces the same artwork.

- Provide a minimal UI overlay:
	- Seed input (text) + “Randomize” button

	- “Regenerate” button

	- Toggle: Animated (on/off)

	- Slider(s) for at least 2 parameters (e.g., complexity, palette shift, density)

	- “Save PNG” button (download current canvas)

	- Display current seed in the UI


- Allow keyboard shortcuts:
	- R = regenerate

	- S = save PNG

	- Space = toggle animation


- Handle resize smoothly:
	- Re-render on resize (debounced)

	- Respect devicePixelRatio for crisp output


- Add a subtle background and tasteful typography in CSS; keep UI unobtrusive.

- Use an algorithm that reliably produces aesthetically pleasing results:
	- Examples: flow fields + particles, domain warping, layered noise fields, signed-distance shapes, or ribbon/ink effects.

	- Use your own PRNG and noise implementation (value/perlin/simplex-like is fine) without external libraries.


DELIVERABLES


1. Write the complete HTML into a file named: generative-art.html

2. After writing it, open it in the user’s default browser on Windows.
	- Use a Windows-appropriate command (PowerShell or cmd).

	- Prefer something that works universally, e.g. cmd /c start "" "generative-art.html".


IMPLEMENTATION NOTES


- Keep the JS well-structured:
	- initCanvas(), resizeCanvas(), renderStill(), startAnimation(), stopAnimation()

	- PRNG(seedString) -> random() in [0,1)

	- noise2D(x,y) and/or fbm for richer structure

	- Palette function that returns harmonious colors (e.g., HSL-based with curated constraints)


- Visual quality:
	- Layer multiple passes with varying blend modes (globalCompositeOperation) carefully.

	- Use subtle grain/dither (lightweight) for texture.

	- Ensure colors aren’t muddy; keep contrast and negative space.


- Accessibility/usability:
	- UI readable on dark background.

	- Works with mouse and touch.

	- Doesn’t spam console; no errors.


WHAT TO OUTPUT


- Create/edit the file generative-art.html with the full code.

- Then run the command to open it.

- Do not provide partial snippets; the HTML must be complete and runnable.

Now implement it.
Create a single self-contained HTML5 file (no external assets, no CDN) that renders beautiful generative art.

GOALS


- Produce striking, gallery-quality generative art on an HTML5 <canvas>.

- Must be a single file: all HTML/CSS/JS inline.

- Must run offline.

- Must look good at any window size and on high-DPI screens.

- Must be performant (aim for 60fps if animated; avoid heavy per-pixel loops unless optimized).

- Include a deterministic PRNG with a user-provided seed so the same seed reproduces the same artwork.

- Provide a minimal UI overlay:
	- Seed input (text) + “Randomize” button

	- “Regenerate” button

	- Toggle: Animated (on/off)

	- Slider(s) for at least 2 parameters (e.g., complexity, palette shift, density)

	- “Save PNG” button (download current canvas)

	- Display current seed in the UI


- Allow keyboard shortcuts:
	- R = regenerate

	- S = save PNG

	- Space = toggle animation


- Handle resize smoothly:
	- Re-render on resize (debounced)

	- Respect devicePixelRatio for crisp output


- Add a subtle background and tasteful typography in CSS; keep UI unobtrusive.

- Use an algorithm that reliably produces aesthetically pleasing results:
	- Examples: flow fields + particles, domain warping, layered noise fields, signed-distance shapes, or ribbon/ink effects.

	- Use your own PRNG and noise implementation (value/perlin/simplex-like is fine) without external libraries.


DELIVERABLES


1. Write the complete HTML into a file named: generative-art.html

2. After writing it, open it in the user’s default browser on Windows.
	- Use a Windows-appropriate command (PowerShell or cmd).

	- Prefer something that works universally, e.g. cmd /c start "" "generative-art.html".


IMPLEMENTATION NOTES


- Keep the JS well-structured:
	- initCanvas(), resizeCanvas(), renderStill(), startAnimation(), stopAnimation()

	- PRNG(seedString) -> random() in [0,1)

	- noise2D(x,y) and/or fbm for richer structure

	- Palette function that returns harmonious colors (e.g., HSL-based with curated constraints)


- Visual quality:
	- Layer multiple passes with varying blend modes (globalCompositeOperation) carefully.

	- Use subtle grain/dither (lightweight) for texture.

	- Ensure colors aren’t muddy; keep contrast and negative space.


- Accessibility/usability:
	- UI readable on dark background.

	- Works with mouse and touch.

	- Doesn’t spam console; no errors.


WHAT TO OUTPUT


- Create/edit the file generative-art.html with the full code.

- Then run the command to open it.

- Do not provide partial snippets; the HTML must be complete and runnable.

Now implement it.Create a single self-contained HTML5 file (no external assets, no CDN) that renders beautiful generative art.

GOALS


- Produce striking, gallery-quality generative art on an HTML5 <canvas>.

- Must be a single file: all HTML/CSS/JS inline.

- Must run offline.

- Must look good at any window size and on high-DPI screens.

- Must be performant (aim for 60fps if animated; avoid heavy per-pixel loops unless optimized).

- Include a deterministic PRNG with a user-provided seed so the same seed reproduces the same artwork.

- Provide a minimal UI overlay:
	- Seed input (text) + “Randomize” button

	- “Regenerate” button

	- Toggle: Animated (on/off)

	- Slider(s) for at least 2 parameters (e.g., complexity, palette shift, density)

	- “Save PNG” button (download current canvas)

	- Display current seed in the UI


- Allow keyboard shortcuts:
	- R = regenerate

	- S = save PNG

	- Space = toggle animation


- Handle resize smoothly:
	- Re-render on resize (debounced)

	- Respect devicePixelRatio for crisp output


- Add a subtle background and tasteful typography in CSS; keep UI unobtrusive.

- Use an algorithm that reliably produces aesthetically pleasing results:
	- Examples: flow fields + particles, domain warping, layered noise fields, signed-distance shapes, or ribbon/ink effects.

	- Use your own PRNG and noise implementation (value/perlin/simplex-like is fine) without external libraries.


DELIVERABLES


1. Write the complete HTML into a file named: generative-art.html

2. After writing it, open it in the user’s default browser on Windows.
	- Use a Windows-appropriate command (PowerShell or cmd).

	- Prefer something that works universally, e.g. cmd /c start "" "generative-art.html".


IMPLEMENTATION NOTES


- Keep the JS well-structured:
	- initCanvas(), resizeCanvas(), renderStill(), startAnimation(), stopAnimation()

	- PRNG(seedString) -> random() in [0,1)

	- noise2D(x,y) and/or fbm for richer structure

	- Palette function that returns harmonious colors (e.g., HSL-based with curated constraints)


- Visual quality:
	- Layer multiple passes with varying blend modes (globalCompositeOperation) carefully.

	- Use subtle grain/dither (lightweight) for texture.

	- Ensure colors aren’t muddy; keep contrast and negative space.


- Accessibility/usability:
	- UI readable on dark background.

	- Works with mouse and touch.

	- Doesn’t spam console; no errors.


WHAT TO OUTPUT


- Create/edit the file generative-art.html with the full code.

- Then run the command to open it.

- Do not provide partial snippets; the HTML must be complete and runnable.

Now implement it.Create a single self-contained HTML5 file (no external assets, no CDN) that renders beautiful generative art.

GOALS


- Produce striking, gallery-quality generative art on an HTML5 <canvas>.

- Must be a single file: all HTML/CSS/JS inline.

- Must run offline.

- Must look good at any window size and on high-DPI screens.

- Must be performant (aim for 60fps if animated; avoid heavy per-pixel loops unless optimized).

- Include a deterministic PRNG with a user-provided seed so the same seed reproduces the same artwork.

- Provide a minimal UI overlay:
	- Seed input (text) + “Randomize” button

	- “Regenerate” button

	- Toggle: Animated (on/off)

	- Slider(s) for at least 2 parameters (e.g., complexity, palette shift, density)

	- “Save PNG” button (download current canvas)

	- Display current seed in the UI


- Allow keyboard shortcuts:
	- R = regenerate

	- S = save PNG

	- Space = toggle animation


- Handle resize smoothly:
	- Re-render on resize (debounced)

	- Respect devicePixelRatio for crisp output


- Add a subtle background and tasteful typography in CSS; keep UI unobtrusive.

- Use an algorithm that reliably produces aesthetically pleasing results:
	- Examples: flow fields + particles, domain warping, layered noise fields, signed-distance shapes, or ribbon/ink effects.

	- Use your own PRNG and noise implementation (value/perlin/simplex-like is fine) without external libraries.


DELIVERABLES


1. Write the complete HTML into a file named: generative-art.html

2. After writing it, open it in the user’s default browser on Windows.
	- Use a Windows-appropriate command (PowerShell or cmd).

	- Prefer something that works universally, e.g. cmd /c start "" "generative-art.html".


IMPLEMENTATION NOTES


- Keep the JS well-structured:
	- initCanvas(), resizeCanvas(), renderStill(), startAnimation(), stopAnimation()

	- PRNG(seedString) -> random() in [0,1)

	- noise2D(x,y) and/or fbm for richer structure

	- Palette function that returns harmonious colors (e.g., HSL-based with curated constraints)


- Visual quality:
	- Layer multiple passes with varying blend modes (globalCompositeOperation) carefully.

	- Use subtle grain/dither (lightweight) for texture.

	- Ensure colors aren’t muddy; keep contrast and negative space.


- Accessibility/usability:
	- UI readable on dark background.

	- Works with mouse and touch.

	- Doesn’t spam console; no errors.


WHAT TO OUTPUT


- Create/edit the file generative-art.html with the full code.

- Then run the command to open it.

- Do not provide partial snippets; the HTML must be complete and runnable.

Now implement it.