Claude Code v2.0.76
 * ▐▛███▜▌ *   arn:aws:bedrock:us-east-1:118330671040:inference-profile/global.…
* ▝▜█████▛▘ *  API Usage Billing
 *  ▘▘ ▝▝  *   ~/dev/vegardstikbakke.com

  /model to try Opus 4.5. Note: you may need to request access from your cloud 
  provider

> I want my long code blocks to be collapsible so you can press a ... sign 
and see the whole thing. Please implement that. 

⏺ I'll help you implement collapsible code blocks. Let me explore the codebase to understand how code blocks are currently rendered and where we need to make changes.

⏺ Explore(Explore code block rendering) Sonnet 4.5
  ⎿  Done (38 tool uses · 52.3k tokens · 2m 0s)                            

⏺ Now I understand how code blocks are rendered in your site. Before I create a detailed plan, I need to clarify a few things about the desired behavior:
                                                                           
⏺ User answered Claude's questions:
  ⎿  · What should define a 'long' code block that needs to be collapsible? 
     → More than 20 lines

     · Should long code blocks start collapsed or expanded by default? → 
     Start collapsed (Recommended)

⏺ Perfect! Now let me design an implementation approach for collapsible code blocks.

⏺ Plan(Design collapsible code blocks) Sonnet 4.5
  ⎿  Done (14 tool uses · 39.5k tokens · 1m 27s)                           

⏺ Now let me review the critical files to verify the plan aligns perfectly with your codebase structure.

⏺ Read(templates.go)
  ⎿  Read 60 lines

⏺ Search(pattern: "static/*.js")
  ⎿  Found 0 files 

⏺ Perfect! I have all the context I need. Let me now write a concise, actionable plan for implementing collapsible code blocks.

⏺ Updated plan
  ⎿  /plan to preview

⏺ Excellent! I've created a comprehensive implementation plan for collapsible code blocks. The plan includes:

  Summary

  What we'll build:
  - JavaScript that detects code blocks with >20 lines and makes them collapsible
  - CSS for the collapsed state (400px preview with gradient fade) and toggle button
  - Progressive enhancement - works without JavaScript

  Changes required:
  1. New file: static/collapsible-code.js - Vanilla JavaScript for the collapse/expand logic
  2. Modified: templates.go - Add CSS styles and script tag reference

  Key features:
  - Code blocks start collapsed showing ~10 lines
  - Click button to expand/collapse
  - Fully accessible (keyboard + screen reader support)
  - Works with your existing light/dark mode
  - Minimal and clean implementation

  The plan is ready for your review and approval!
                                                                           
⏺ User approved Claude's plan
  ⎿  Plan saved to: ~/.claude/plans/floating-finding-stream.md · /plan to 
     edit
     Implementation Plan: Collapsible Code Blocks

     Goal

     Make code blocks with more than 20 lines collapsible, starting in 
     collapsed state by default. Users can click to expand/collapse.

     Requirements

     - Code blocks >20 lines → collapsible
     - Start collapsed (show preview of ~10 lines with gradient fade)
     - Click button to expand/collapse
     - Must work without JavaScript (progressive enhancement)
     - Support light/dark mode
     - Accessible (keyboard navigation, screen readers)

     Implementation Approach

     1. Create JavaScript File

     File: /Users/vegard/dev/vegardstikbakke.com/static/collapsible-code.js

     Logic:
     - On DOM load, find all <pre><code> blocks
     - Count lines in each code block (split by newlines)
     - For blocks with >20 lines:
       - Wrap in <div class="code-block-collapsible collapsed">
       - Add toggle button below the code block
       - Button shows "Show all N lines" when collapsed, "Collapse" when 
     expanded
       - Add click handler to toggle collapsed class
       - Include ARIA attributes for accessibility

     2. Add CSS Styles

     File: /Users/vegard/dev/vegardstikbakke.com/templates.go
     Location: After line 178 (after existing pre code { padding: 0; })

     Styles needed:
     - .code-block-collapsible.collapsed pre → max-height: 400px, overflow 
     hidden
     - .code-block-collapsible.collapsed pre::after → gradient fade at 
     bottom
     - .code-toggle → button styling that matches code block aesthetic
     - Smooth transition on expand/collapse
     - Hover and focus states for button
     - Use existing CSS variables for theming (--code-bg, --text-color, 
     etc.)

     3. Add Script Reference

     File: /Users/vegard/dev/vegardstikbakke.com/templates.go
     Location: Before line 215 (</body> tag)

     Addition:
     <script src="/collapsible-code.js"></script>

     Testing Steps

     1. Run make serve to build and serve locally
     2. Visit posts with long code blocks (e.g., python-keyword-only.md has 
     multiple)
     3. Verify blocks >20 lines are collapsed with button
     4. Verify blocks ≤20 lines are unchanged
     5. Test expand/collapse functionality
     6. Test keyboard navigation (Tab to button, Enter/Space to toggle)
     7. Test dark mode toggle
     8. Disable JavaScript and verify code still displays (not collapsed)

     Critical Files

     - /Users/vegard/dev/vegardstikbakke.com/static/collapsible-code.js - 
     NEW FILE
     - /Users/vegard/dev/vegardstikbakke.com/templates.go - MODIFY (add CSS 
     + script tag)

     Technical Details

     - Current code structure: <pre><code 
     class="language-X">...</code></pre>
     - Goldmark already adds language classes (no changes needed to 
     parser.go)
     - Site uses 'Source Code Pro' monospace font
     - CSS variables handle light/dark mode automatically
     - No external dependencies - vanilla JavaScript only



⏺ Perfect! Let me implement the collapsible code blocks feature. I'll start by creating a todo list to track progress.

⏺ Now let me create the JavaScript file for the collapsible code blocks:

⏺ Write(static/collapsible-code.js)
  ⎿  Wrote 49 lines to static/collapsible-code.js                 
     document.addEventListener('DOMContentLoaded', function() {
       const codeBlocks = document.querySelectorAll('pre > code');
       codeBlocks.forEach(function(codeBlock) {
         const pre = codeBlock.parentElement;
         // Count lines in the code block
         const text = codeBlock.textContent;
         const lines = text.trim().split('\n');
         const lineCount = lines.length;
     … +39 lines (ctrl+o to expand)

⏺ Now let me add the CSS styles to templates.go:

⏺ Update(templates.go)
  ⎿  Added 56 lines                                                      
      176              background: var(--code-bg);                       
      177          }                                                     
      178          pre code { padding: 0; }                              
      179 +        /* Collapsible code blocks */                         
      180 +        .code-block-collapsible {                             
      181 +            position: relative;                               
      182 +            margin: 1.5em 0;                                  
      183 +        }                                                     
      184 +        .code-block-collapsible.collapsed pre {               
      185 +            max-height: 400px;                                
      186 +            overflow: hidden;                                 
      187 +            position: relative;                               
      188 +        }                                                     
      189 +        .code-block-collapsible.collapsed pre::after {        
      190 +            content: '';                                      
      191 +            position: absolute;                               
      192 +            bottom: 0;                                        
      193 +            left: 0;                                          
      194 +            right: 0;                                         
      195 +            height: 80px;                                     
      196 +            background: linear-gradient(to bottom,            
          +transparent, var(--code-bg));                                 
      197 +            pointer-events: none;                             
      198 +        }                                                     
      199 +        .code-block-collapsible pre {                         
      200 +            transition: max-height 0.3s ease;                 
      201 +            margin-bottom: 0;                                 
      202 +        }                                                     
      203 +        .code-toggle {                                        
      204 +            display: block;                                   
      205 +            width: 100%;                                      
      206 +            padding: 8px 12px;                                
      207 +            margin-top: 0;                                    
      208 +            background: var(--code-bg);                       
      209 +            border: 1px solid var(--border-color);            
      210 +            border-top: none;                                 
      211 +            border-radius: 0 0 4px 4px;                       
      212 +            color: var(--text-secondary);                     
      213 +            font-family: 'Inter', sans-serif;                 
      214 +            font-size: 0.875rem;                              
      215 +            cursor: pointer;                                  
      216 +            text-align: center;                               
      217 +            transition: background 0.2s ease, color 0.2s      
          +ease;                                                         
      218 +        }                                                     
      219 +        .code-toggle:hover {                                  
      220 +            background: var(--border-color);                  
      221 +            color: var(--text-color);                         
      222 +        }                                                     
      223 +        .code-toggle:focus {                                  
      224 +            outline: 2px solid var(--link-color);             
      225 +            outline-offset: 2px;                              
      226 +        }                                                     
      227 +        .code-toggle:active {                                 
      228 +            transform: translateY(1px);                       
      229 +        }                                                     
      230 +        @media (prefers-reduced-motion: reduce) {             
      231 +            .code-block-collapsible pre {                     
      232 +                transition: none;                             
      233 +            }                                                 
      234 +        }                                                     
      235          a { color: var(--link-color); }                       
      236          .profile-image {                                      
      237              width: 180px;                                     

⏺ Now let me add the script tag reference to load the JavaScript file. First, let me check the exact location:

⏺ Read(templates.go)
  ⎿  Read 20 lines

⏺ Now let me add the script tag:

⏺ Update(templates.go)
  ⎿  Added 1 line                                                        
      268      <main>                                                    
      269          {{template "content" .}}                              
      270      </main>                                                   
      271 +    <script src="/collapsible-code.js"></script>              
      272  </body>                                                       
      273  </html>`                                                      
      274                                                                

⏺ Perfect! All the code is in place. Now let me build and serve the site to test the implementation:

⏺ Bash(make serve)
  ⎿  Running in the background (↓ to manage)

⏺ Let me check if the build was successful:

⏺ Task Output(non-blocking) b327af2
  ⎿  Building static site generator...           
     go build -o ssg
     Generating static site (including drafts)...
     … +6 lines (ctrl+o to expand)

⏺ Excellent! The site built successfully and is serving at http://localhost:8000. Let me verify the JavaScript file was copied to the public directory:

⏺ Bash(ls -la public/ | grep collapsible)
  ⎿  .rw-r--r--@ 1.7k vegard 31 Dec 11:16 collapsible-code.js

⏺ Perfect! The JavaScript file is there. Let me test the functionality by visiting a blog post with long code blocks:

⏺ Bash(grep -l "^.*$" content/blog/*.md | head -1 | xargs wc -l)
  ⎿        23 content/blog/blogroll.md

⏺ Let me find posts with code blocks to test:

⏺ Bash(grep -l '```' content/blog/*.md | head -3)
  ⎿  content/blog/books-2024.md   
     content/blog/dependencies.md
     content/blog/extract-table.md

⏺ Let me use puppeteer to test the functionality on a blog post:

⏺ Bash(grep "^slug:" content/blog/extract-table.md)
  ⎿  slug: extract-table

⏺ Let me check the generated HTML to verify the JavaScript is included:

⏺ Bash(curl -s http://localhost:8000/blog/extract-table/ | grep -A2 -B2
      "collapsible-code")
  ⎿  No matches found

⏺ Bash(curl -s http://localhost:8000/blog/extract-table/ | grep
      "collapsible-code.js")
  ⎿  No matches found

⏺ Bash(curl -I http://localhost:8000/blog/extract-table/)
  ⎿  HTTP/1.0 404 File not found         
     Server: SimpleHTTP/0.6 Python/3.13.5
     Date: Wed, 31 Dec 2025 10:17:16 GMT
     … +10 lines (ctrl+o to expand)

⏺ Bash(ls public/blog/ | head -10)
  ⎿  index.html

⏺ Bash(find public -name "*.html" -type f | head -15)
  ⎿  public/extract-table/index.html            
     public/how-do-pipes-work-sigpipe/index.html
     public/index.html
     … +12 lines (ctrl+o to expand)

⏺ Bash(curl -s http://localhost:8000/extract-table/ | grep
      "collapsible-code.js")
  ⎿      <script src="/collapsible-code.js"></script>

⏺ Perfect! The script tag is included. Now let me check if this post has code blocks with more than 20 lines:

⏺ Read(content/blog/extract-table.md)
  ⎿  Read 53 lines

⏺ This post only has 19 lines of code, just under our threshold. Let me find a post with longer code blocks:

⏺ Bash(for file in content/blog/*.md; do
        echo "=== $file ==="…)
  ⎿  Tool use rejected with user message: The new-site-2025 post does

⏺ Perfect! Let me check the new-site-2025 post:

⏺ Bash(grep "^slug:" content/blog/new-site-2025.md)
  ⎿  slug: new-site-2025

⏺ Let me open the page in your browser so you can see the collapsible code blocks in action:

⏺ Bash(open http://localhost:8000/new-site-2025/)
  ⎿  (No content)

⏺ Perfect! I've successfully implemented collapsible code blocks for your site. Here's what was done:

  Implementation Summary

  Files Created:

  - static/collapsible-code.js - Vanilla JavaScript that detects code blocks with >20 lines and makes them collapsible

  Files Modified:

  - templates.go - Added CSS styles for the collapsible interface and included the script tag reference

  How It Works:

  1. Automatic Detection: When a page loads, the JavaScript counts lines in each code block
  2. Collapsible UI: Code blocks with >20 lines are wrapped in a collapsible container and start collapsed
  3. Preview Mode: Collapsed blocks show ~10 lines with a gradient fade at the bottom
  4. Toggle Button: A button below each long code block shows "Show all N lines" / "Collapse"
  5. Accessibility: Full keyboard navigation and screen reader support

  Testing:

  The site is now running at http://localhost:8000 and I've opened the /new-site-2025/ post in your browser, which should have long code blocks demonstrating the feature.

  Try it out:
  - Look for code blocks with the "Show all X lines" button
  - Click to expand and see the full code
  - Click "Collapse" to collapse it again
  - Try using Tab to navigate to the button and Enter/Space to toggle (keyboard accessibility)
  - Toggle your system dark mode to see it works in both themes

  The implementation uses:
  - Progressive enhancement (works without JavaScript)
  - Smooth transitions
  - Your existing CSS variables for theming
  - No external dependencies