Managing llms.txt in Fiidom AEO

llms.txt is a public file published at /llms.txt on your store. It gives AI assistants an AI-friendly index of your store's most important content, so they can quickly see what you offer before deciding what to explore further.

Think of it as your store's table of contents for AI. Unlike llms-full.txt, it doesn't contain the full content of your website. It holds short summaries and the URL of each resource. llms.txt helps AI discover your store, and llms-full.txt helps it understand your store in depth. Both use the same data sources and the same settings screen.

Open the llms.txt page

Go to Apps > Fiidom AEO > AI Discovery, open AI Files, and select the AI Index (llms.txt) tab. You can also click View details next to llms.txt in the Overview table.

File status

Status	What it means
Synced	The file was processed successfully and is live.
Processing	Shopify is processing the file. Edit and Regenerate are turned off until it finishes.
Not synced	An error occurred, or processing took longer than 10 minutes.

The status is checked when you open the page and refreshes automatically while you're on it.

Header actions

View live file

Opens the public llms.txt on your store. This is exactly what AI assistants read, so use it to confirm your changes are live.

Regenerate

Rebuilds llms.txt from:

• Your current store data
• The index sources you've enabled
• The fields you've selected
• The item limit for each source

Once you've generated or edited llms.txt in Fiidom, it doesn't update automatically when you add new products, collections, or other content. Click Regenerate whenever your store content changes so AI assistants see your latest catalog.

After you click Regenerate, a save bar appears. Save to apply the new version.

• If it succeeds, the status changes to Synced, and the file size, last updated time, and preview all refresh.
• If it fails, the status changes to Not synced and you'll see the message Unable to regenerate llms.txt. Please try again.

Edit

Opens the editor so you can change part of the file (see the next section).

Note: The original llms.txt that Shopify creates can't be edited. Until you regenerate, the Edit button is disabled. Hover over it to see Regenerate the file before editing. Once you've regenerated, the file uses Fiidom's template, and you can edit it.

Edit llms.txt

The editor splits the file into two areas:

• Editable area (top): everything before the auto-generated block, such as your store name and short description. You can change this text freely.
• Auto-generated area (bottom, marked read-only): everything from the system-generated block onward, including your policies, products, collections, and other indexed content. This part is built from your index sources, so you change it through Index sources settings, not by typing.

To edit:

1. Click Edit.
2. Change the text in the editable area.
3. Click Save to keep your changes, or Discard to throw them away.

After saving, the editor returns to preview mode and shows the new status, such as Synced. While editing, you can also use View live file and Copy.

If the file is still processing after you save, editing is locked until it finishes. Hover over the editor to see why. If processing fails, or doesn't finish within 10 minutes, the status changes to Not synced and an error message appears on the page after you close the editor.

Reset to default

Once you've edited or regenerated llms.txt, a Reset to default button appears in the File Preview. It restores the original file Shopify created and removes your customizations. It isn't shown while you're still using Shopify's original file.

Choose what goes into llms.txt: Index sources

The Index sources panel controls which store content is included. Each source is a card that shows the fields you've selected and its status. Click a card to open its settings.

Source	Status options	Default
Products	Enabled / Disabled	Enabled
Collections	Enabled / Disabled	Enabled
Blog posts	Enabled / Disabled	Enabled when your store has at least one published article
Pages	Enabled / Disabled	Enabled
Policies / Store info	Auto	Always included

Source settings

Each source's settings window has the same structure:

• Status: turn the source on (Activated) or off (Deactivated). For example, "Include Products in file".
• Fields: the details included for each item. You can remove fields, but at least one must stay selected. You'll see an error and can't save if none are left.
• Filter (optional): include only items that match. Leave filters empty to include all active, published items.
• Item limit: how many items to include. Items are sorted by most recently created.

Click Save changes to apply your settings, then Regenerate the file so it reflects them.

Fields and filters by source

Source	Default fields	Optional fields	Filters
Products	Title, URL, Price	SEO title, SEO description	Tag, Type, Category, Collection, Vendor. You can choose several values for each.
Collections	Title, URL	SEO title, SEO description	Automated or manual collections
Blog posts	Title, URL	SEO title, SEO description	Blog and author. You can choose several of each.
Pages	Title, URL	SEO title, SEO description	None
Policies / Store info	Store name, Store URL (always included)	Contact page, Shipping policy, Refund policy, Privacy policy, Terms of service	None

Optional fields are available on the Loyalty plan.

Item limits

Products, collections, blog posts, and pages each have an item limit. The default is 100.

• Without the Loyalty plan: up to 100 items per source.
• With the Loyalty plan: up to 500 items per source.

Leave the limit empty for no limit, up to the maximum for your plan. Policies / Store info has no limit. To include more items, upgrade from the Loyalty page in the app.

How your content appears in llms.txt

Fiidom writes llms.txt as clean, plain text that AI assistants can read easily. It's published at /llms.txt in UTF-8, with no HTML or code blocks.

What's included, and what isn't

• Only the fields you select are added. Fields with no data are skipped, so there are no empty lines.
• Unpublished products, pages, and blog posts are never included.
• Passwords, private data, and customer data are never included.
• Any HTML in your content is converted to plain text.
• All links are full URLs, and prices use your store's currency.

SEO description

For every content type, Fiidom uses the first one available:

1. The SEO meta description
2. The excerpt or short description
3. The first 160 characters of the content

If none of these exist, the line is left out. Fiidom never writes its own SEO description.

Formats

Data	How it appears
One price	Price: 120,000 VND
Price range	Price: 54,100 - 97,696 VND
No price	The Price line is left out.
Variants	Variants: Black - 120,000 VND - SKU: ABC123; White - 125,000 VND - SKU: ABC124. Up to 10 variants are listed, followed by "... and X more".
Tags	Tags: cable, charger, phone accessory (no hashtags)
Inventory status	Inventory status: In stock or Inventory status: Out of stock
Inventory quantity	Inventory quantity: 24 (only if you select this field)

File Preview and File info

The File Preview shows your llms.txt exactly as it's published. It's read-only. Click Copy to copy the whole file. The preview updates after you save settings or regenerate the file.

The File info card shows:

• File size health: the file's size and a health label. Hover over the label for a tip.
• Last updated: when the file was last updated successfully.
• Live file URL: the public link to your llms.txt. Click it to open the live file.

File size health

File size	Health	What it means
Up to 20 KB	Excellent	Well optimized for AI discovery.
Over 20 KB, up to 50 KB	Good	Suitable for most stores.
Over 50 KB, up to 100 KB	Acceptable	Consider reducing duplicate content or splitting large knowledge into multiple files.
Over 100 KB, up to 256 KB	Needs Optimization	The knowledge base is becoming very large. Consider restructuring content for better AI retrieval.

Tips for a strong llms.txt

• Regenerate after store changes. New products and collections aren't added until you click Regenerate.
• Keep it a summary. llms.txt works best as a short index. Use item limits and filters to focus on your most important content, and leave the full detail to llms-full.txt.
• Add SEO fields if you can. SEO titles and descriptions help AI understand each item at a glance.
• Check the live file. After saving or regenerating, click View live file to confirm your changes are published.

Should you need any further information, please do not hesitate to contact us directly at [email protected]