DOC-3356: New feature documentation for tinymceai.

-scripts/README-llm-files.md

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+# Generating LLM Files
+
+This directory contains scripts to automatically generate `llms.txt` and `llms-full.txt` files for LLM consumption.
+
+## Overview
+
+The LLM files provide structured documentation references that help AI assistants:
+- Find the correct documentation pages
+- Understand the documentation structure
+- Reduce hallucinations by providing accurate URLs
+- Discover all available integration options
+
+## Files
+
+- `generate-llm-files.js` - Node.js script that generates the LLM files
+- `generate-llm-files.sh` - Shell wrapper script for easier execution
+
+## Usage
+
+### Option 1: After Local Build
+
+1. Build the documentation site:
+   ```bash
+   yarn antora ./antora-playbook.yml
+   ```
+
+2. Generate LLM files from local sitemap:
+   ```bash
+   yarn generate-llm-files
+   # or
+   ./-scripts/generate-llm-files.sh
+   ```
+
+### Option 2: From Remote Sitemap
+
+Generate directly from the published sitemap (useful for syncing with production):
+
+```bash
+yarn generate-llm-files-from-url
+# or
+node ./-scripts/generate-llm-files.js https://www.tiny.cloud/docs/antora-sitemap.xml
+```
+
+### Option 3: Custom Sitemap Source
+
+```bash
+node ./-scripts/generate-llm-files.js /path/to/sitemap.xml
+# or
+node ./-scripts/generate-llm-files.js https://example.com/sitemap.xml
+```
+
+## Workflow
+
+### Manual Regeneration (Current Approach)
+
+**After major/minor/patch releases:**
+1. Run the script to regenerate files from production sitemap:
+   ```bash
+   yarn generate-llm-files-from-url
+   ```
+   This ensures the LLM files match what's actually published on the live site.
+
+   Alternatively, if you need to generate from a local build:
+   ```bash
+   yarn generate-llm-files
+   ```
+2. Review the generated files in a PR
+3. Commit and merge
+
+**Why not automated in CI/CD?**
+- The script makes 400+ HTTP requests to fetch H1 titles (~4-5 minutes)
+- Resource-intensive and slow for every build
+- Manual review ensures quality before committing
+- Validates no 404s are listed and titles match actual page content
+
+### File Locations
+
+The files are generated in `modules/ROOT/attachments/`:
+- `llms.txt` - Simplified, curated documentation index (~105 lines)
+- `llms-full.txt` - Complete documentation index with all pages (~700 lines)
+
+**Post-build:** Files are moved to the root directory (handled in separate PR) and accessible at:
+- `https://www.tiny.cloud/docs/tinymce/latest/llms.txt`
+- `https://www.tiny.cloud/docs/llms-full.txt`
+
+## How It Works
+
+1. **Reads sitemap.xml** - Extracts all documentation URLs from the sitemap (only `/latest/` URLs)
+2. **Fetches H1 titles** - Makes HTTP requests to each page to get the actual H1 title (validates no 404s)
+3. **Generates titles** - Uses fetched H1 titles, falls back to URL-based titles if fetch fails
+4. **Categorizes pages** - Groups by topic (integrations, plugins, API, etc.) based on URL patterns
+5. **Deduplicates** - Removes duplicate URLs and makes titles unique within categories
+6. **Generates structured markdown** - Creates both simplified (`llms.txt`) and complete (`llms-full.txt`) indexes
+
+## Customization
+
+The script uses hardcoded categorization logic. To customize:
+
+1. Edit `generate-llm-files.js`
+2. Modify the `categorizeUrl()` function to adjust categorization
+3. Update `generateLLMsTxt()` and `generateLLMsFullTxt()` to change output format
+
+## Notes
+
+- The script requires Node.js and `sanitize-html` package (installed via `yarn install`)
+- Generated files are written to `modules/ROOT/attachments/`
+- Uses only the sitemap (no dependency on `nav.adoc`)
+- Fetches actual H1 titles from pages (validates no 404s)
+- Rate-limited fetching: 10 concurrent requests with 100ms delay between batches
+- Request timeout: 10 seconds per page
+- Security: Validates URLs to prevent SSRF attacks (only allows tiny.cloud domains)
+- Handles HTML entity decoding (`’` → `'`)
+- Filters out error pages and duplicate URLs
+- Makes titles unique within categories (e.g., "ES6 and npm (Webpack)", "ES6 and npm (Rollup)")
+- Falls back to URL-based title generation if H1 fetch fails
+
+## Troubleshooting
+
+**Error: "Source not found"**
+- Make sure the sitemap path is correct
+- For remote URLs, check your internet connection
+- For local files, ensure Antora has generated the site first
+
+**Missing page titles**
+- If H1 fetch fails, the script uses URL-based title generation as fallback
+- Check that pages return valid HTML with H1 tags
+- 404 pages are automatically filtered out
+
+**Incorrect categorization**
+- Review the `categorizeUrl()` function (note: function name is singular, not plural)
+- Add custom patterns for new page types