Fix GitHub Pages Mermaid diagram rendering in docs/

[Copilot]

After script-regenerated docs/*.md files, mermaid diagrams stopped rendering due to missing YAML front matter and improper Mermaid initialization.

Changes

YAML Front Matter

• Added front matter to pipeline_map.md and project_audit.md (the only files with mermaid blocks that were missing it)

Layout Updates (_layouts/default.html)

• Added defer to all script tags
• Split Mermaid init into dedicated mermaid-init.js

New assets/js/mermaid-init.js

• Converts Jekyll's <pre><code class="language-mermaid"> → <div class="mermaid">
• Initializes Mermaid with dark theme config
• Retry logic with 5s max timeout for async CDN loading

// Jekyll renders ```mermaid as:
<pre><code class="language-mermaid">graph TD...</code></pre>

// But Mermaid.js expects:
<div class="mermaid">graph TD...</div>

Refactored assets/js/custom.js

• Removed duplicate Mermaid code (now in mermaid-init.js)

Original prompt

Summary:
The docs/ folder is used to deploy the project site via GitHub Pages. After a script regenerated docs/*.md files, mermaid diagrams stopped rendering and some pages appear unprocessed. Root causes likely include missing YAML front matter in regenerated Markdown files, missing/incorrect docs/_layouts/default.html that loads assets, asset path mismatches due to missing site.baseurl usage, and lack of a mermaid initialization script that converts fenced mermaid code blocks to .mermaid divs and calls mermaid.init().

Goal:
Create a PR that restores proper GitHub Pages rendering for docs/ mermaid diagrams and ensures the static site builds correctly when docs/*.md are re-generated by scripts. The PR should add or update files in the docs/ tree and update content while preserving existing page content.

Deliverables (actions for the coding agent):

1. Ensure docs/pipeline_map.md and docs/project_audit.md (and any other docs/*.md that include mermaid fences) have YAML front matter. If a file is missing front matter, prepend a minimal front matter block that preserves existing content. Use this template:

---

layout: default
title: "REPLACE_WITH_PAGE_TITLE"

(Replace the title with a one-line title derived from the file name; keep the rest of the file unchanged.)

2. Add docs/_layouts/default.html if it does not exist, or update it if present, to ensure site skeleton includes scripts/styles with site.baseurl/relative_url. The layout must include at minimum:

• meta charset and viewport
• link to css at {{ '/assets/css/style.css' | relative_url }} (if present)
• mermaid JS inclusion via CDN (defer) and a local mermaid-init.js using relative_url, loaded with defer
• yield the page content with {{ content }}

Provide a safe, minimal layout that will not overwrite custom head blocks if they already exist (i.e., keep markup simple but workable).

3. Add docs/assets/js/mermaid-init.js that:

• waits for DOMContentLoaded
• finds

   or code.language-mermaid blocks

• converts them into
  with the inner text preserved
• calls mermaid.initialize({ startOnLoad: false }) and then mermaid.init(undefined, document.querySelectorAll('.mermaid'))
• uses defensive checks so it fails silently if mermaid is not loaded

Use the following implementation (agent should create file with this content):
(function(){
function migrateMermaidCodeBlocks(){
try{
var codes = document.querySelectorAll('pre > code.language-mermaid, pre > code.lang-mermaid');
codes.forEach(function(code){
var pre = code.parentNode;
var container = document.createElement('div');
container.className = 'mermaid';
container.textContent = code.textContent;
pre.parentNode.replaceChild(container, pre);
});
if(window.mermaid && typeof window.mermaid.init === 'function'){
window.mermaid.initialize({ startOnLoad: false });
window.mermaid.init(undefined, document.querySelectorAll('.mermaid'));
}
}catch(e){
console.warn('mermaid-init error', e);
}
}
if(document.readyState === 'loading') document.addEventListener('DOMContentLoaded', migrateMermaidCodeBlocks);
else migrateMermaidCodeBlocks();
})();

4. Ensure docs/_config.yml contains correct url and baseurl for project site. If baseurl is missing or incorrect, update (or add) these keys:
   url: "https://basic-nature.github.io"
   baseurl: "/html_Parser_prototype"

If docs/_config.yml already contains these keys, do not overwrite other configs; only set/add these two keys if missing or wrong.

5. Update any layouts or include files to reference scripts/styles using relative_url or prepend {{ site.baseurl }} to absolute assets. Specifically, change script/link tags to use the Liquid filters like: {{ '/assets/js/mermaid-init.js' | relative_url }}. Do not hardcode absolute paths beginning with '/'.

6. Add a short README note docs/README_pages_FIX.md describing what changed and why (front matter, baseurl, mermaid-init), so future generators preserve front matter and assets.

7. Tests and verification steps (in PR description):

• Run a local Jekyll build (bundle exec jekyll build --source docs --destination _site) and confirm that pipeline_map.html and project_audit.html are generated under _site and contain
  elements rather than raw fenced blocks.
• Open the generated HTML in a browser (or inspect generated HTML) to ensure the mermaid-init script is referenced and asset URLs include the baseurl path.
• In browser DevTools (Network tab) ensure there are no 404s for mermaid-init.js or mermaid.min.js and check Console for no mermaid-related errors.

Implementation notes and constraints for the agent:

• Preserve existing content inside docs/*.md files (only add front matter when missing, do not modify other text except the insertion).
• When updating docs/_config.yml, preserve other keys and comments. Add or update only url and baseurl.
• When addi...

This pull request was created as a result of the following prompt from Copilot chat.

Summary:
The docs/ folder is used to deploy the project site via GitHub Pages. After a script regenerated docs/*.md files, mermaid diagrams stopped rendering and some pages appear unprocessed. Root causes likely include missing YAML front matter in regenerated Markdown files, missing/incorrect docs/_layouts/default.html that loads assets, asset path mismatches due to missing site.baseurl usage, and lack of a mermaid initialization script that converts fenced mermaid code blocks to .mermaid divs and calls mermaid.init().

Goal:
Create a PR that restores proper GitHub Pages rendering for docs/ mermaid diagrams and ensures the static site builds correctly when docs/*.md are re-generated by scripts. The PR should add or update files in the docs/ tree and update content while preserving existing page content.

Deliverables (actions for the coding agent):

1. Ensure docs/pipeline_map.md and docs/project_audit.md (and any other docs/*.md that include mermaid fences) have YAML front matter. If a file is missing front matter, prepend a minimal front matter block that preserves existing content. Use this template:

---

layout: default
title: "REPLACE_WITH_PAGE_TITLE"

(Replace the title with a one-line title derived from the file name; keep the rest of the file unchanged.)

2. Add docs/_layouts/default.html if it does not exist, or update it if present, to ensure site skeleton includes scripts/styles with site.baseurl/relative_url. The layout must include at minimum:

• meta charset and viewport
• link to css at {{ '/assets/css/style.css' | relative_url }} (if present)
• mermaid JS inclusion via CDN (defer) and a local mermaid-init.js using relative_url, loaded with defer
• yield the page content with {{ content }}

Provide a safe, minimal layout that will not overwrite custom head blocks if they already exist (i.e., keep markup simple but workable).

3. Add docs/assets/js/mermaid-init.js that:

• waits for DOMContentLoaded
• finds

   or code.language-mermaid blocks

• converts them into
  with the inner text preserved
• calls mermaid.initialize({ startOnLoad: false }) and then mermaid.init(undefined, document.querySelectorAll('.mermaid'))
• uses defensive checks so it fails silently if mermaid is not loaded

Use the following implementation (agent should create file with this content):
(function(){
function migrateMermaidCodeBlocks(){
try{
var codes = document.querySelectorAll('pre > code.language-mermaid, pre > code.lang-mermaid');
codes.forEach(function(code){
var pre = code.parentNode;
var container = document.createElement('div');
container.className = 'mermaid';
container.textContent = code.textContent;
pre.parentNode.replaceChild(container, pre);
});
if(window.mermaid && typeof window.mermaid.init === 'function'){
window.mermaid.initialize({ startOnLoad: false });
window.mermaid.init(undefined, document.querySelectorAll('.mermaid'));
}
}catch(e){
console.warn('mermaid-init error', e);
}
}
if(document.readyState === 'loading') document.addEventListener('DOMContentLoaded', migrateMermaidCodeBlocks);
else migrateMermaidCodeBlocks();
})();

4. Ensure docs/_config.yml contains correct url and baseurl for project site. If baseurl is missing or incorrect, update (or add) these keys:
   url: "https://basic-nature.github.io"
   baseurl: "/html_Parser_prototype"

If docs/_config.yml already contains these keys, do not overwrite other configs; only set/add these two keys if missing or wrong.

5. Update any layouts or include files to reference scripts/styles using relative_url or prepend {{ site.baseurl }} to absolute assets. Specifically, change script/link tags to use the Liquid filters like: {{ '/assets/js/mermaid-init.js' | relative_url }}. Do not hardcode absolute paths beginning with '/'.

6. Add a short README note docs/README_pages_FIX.md describing what changed and why (front matter, baseurl, mermaid-init), so future generators preserve front matter and assets.

7. Tests and verification steps (in PR description):

• Run a local Jekyll build (bundle exec jekyll build --source docs --destination _site) and confirm that pipeline_map.html and project_audit.html are generated under _site and contain
  elements rather than raw fenced blocks.
• Open the generated HTML in a browser (or inspect generated HTML) to ensure the mermaid-init script is referenced and asset URLs include the baseurl path.
• In browser DevTools (Network tab) ensure there are no 404s for mermaid-init.js or mermaid.min.js and check Console for no mermaid-related errors.

Implementation notes and constraints for the agent:

• Preserve existing content inside docs/*.md files (only add front matter when missing, do not modify other text except the insertion).
• When updating docs/_config.yml, preserve other keys and comments. Add or update only url and baseurl.
• When adding files, use the docs/ path and adjust any directory creation needed (docs/_layouts, docs/assets/js).
• Add minimal tests or verification steps to the PR description explaining how to verify manually.
• Use a concise, descriptive PR title like: "fix(docs): restore mermaid rendering and site baseurl handling for GitHub Pages"

Please open a pull request in repository Basic-Nature/html_Parser_prototype with the changes above. Leave base_ref blank (use default branch). Do not assign reviewers. Include the verification steps in the PR body.

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[Basic-Nature]

@copilot Can you please keep going with making sure the mermaid graphs work on the automated generated files. I would really appreciate if we get more of the graphs to show the node connection for pipeline_map and project_audit. The automated script for these exist within the shared_logic so if we need to make sure the mermaid syntax is correc to regenerate than we should work on patching the code there rather than those specific md. the todos.md, project_audit, and the pipeline_map are all automated scripts to keep track of the overall architecture of the file. There was also some slight automated script in the architecture.md so these are prone to have problems if the code generating the files is not fixed.