Generate FB Marketplace Listing Summary

Every listing we create follows this exact workflow. We never skip steps or guess at product details.

Requirements

Before proceeding, you MUST:

1. •Have a folder path in the listings/ directory containing product images
2. •Commit to analyzing ALL images - not just the first one
3. •Invoke fb-marketplace:research-item whenever brand/model is identified - no exceptions

Workflow

digraph generate_summary {
    rankdir=TB;
    node [shape=box];

    start [label="Receive folder path" shape=ellipse];
    find_images [label="1. Find all images in folder"];
    analyze [label="2. Analyze each image\nIdentify product, brand, model"];
    extract [label="3. Extract brand identifiers\nand model numbers"];
    has_brand [label="Brand/model found?" shape=diamond];
    research [label="4. Invoke fb-marketplace:research-item\nwith identified product"];
    manual [label="Use image analysis for\ngeneric description"];
    check_listing [label="5. Check for existing listing.md\nfor additional context"];
    generate [label="6. Generate output files"];
    done [label="Files created" shape=ellipse];

    start -> find_images;
    find_images -> analyze;
    analyze -> extract;
    extract -> has_brand;
    has_brand -> research [label="yes"];
    has_brand -> manual [label="no"];
    research -> check_listing;
    manual -> check_listing;
    check_listing -> generate;
    generate -> done;
}

Steps

1. Find All Images

IMMEDIATELY scan the provided folder for image files. Never assume what's there.

Supported formats - check for all of these:

• •.jpeg, .jpg, .png, .heic, .webp

2. Analyze Images

Use the Read tool to view EVERY image. For each image, you MUST identify:

• •What is the product? (category, type)
• •Condition: New, like new, good, fair
• •Quantity: Single item or multiple
• •Visible brand names or logos
• •Model numbers, serial numbers, or product codes
• •Size indicators (if visible)

Never stop at the first image - critical information appears on backs, bottoms, and tags.

3. Extract Brand/Model Information

You MUST look for:

• •Brand name on product or packaging
• •Model number (often on stickers, tags, or embossed)
• •UPC/barcode numbers
• •Any text that identifies the specific product

Always check these locations:

• •Front label/logo
• •Bottom or back of product
• •Tags on clothing/shoes
• •Stickers on electronics
• •Embossed text on tools

4. Research Product

If brand/model is identified - this is mandatory:

Invoke skill: fb-marketplace:research-item
Input: Brand name, model number, product category

Never skip research when we have a brand. Research transforms guesses into accurate listings.

If no brand/model found:

• •Use generic product description from image analysis
• •Estimate pricing based on similar items
• •Note "Unbranded" or "Generic" in listing

5. Check Existing listing.md

IMMEDIATELY check if a listing.md file exists in the folder:

• •Read it for additional context (sizes, quantities, notes)
• •Incorporate this information into our output

Never ignore seller notes - they contain information invisible in photos.

6. Generate Output Files

Create three files in the listing folder. Every file MUST follow these exact formats:

title.md

[Concise, searchable title - max 100 chars]
[Brand] [Product Type] [Key Feature/Size] - [Condition]

Our title formula - follow exactly:

• •Lead with brand (if known)
• •Include product type
• •Add distinguishing feature (size, color, model)
• •Keep under 100 characters
• •Use title case

Examples:

• •Galanz ExpressWave 1100W Microwave - Inverter Technology
• •3 Pairs Rubber Boots - Men's Sizes 9, 10, 13
• •SKLZ Quick Ladder Agility Training Set - 15ft

description.md

[Detailed description for FB Marketplace]

## Product Details

[From research or image analysis]

## Condition

[Describe actual condition based on images]

## Includes

[List what's included]

## Specifications

[Dimensions, capacity, etc. if known]

## Pickup

Local pickup only in Chapel Hill off of Larkin Lane.

Our description requirements:

• •Start with a hook (what it is, why it's great)
• •Include specifications from research - never omit these
• •Describe actual condition honestly
• •List what's included
• •Keep paragraphs short for mobile reading

price.md

[Recommended price or price range]

## Pricing Rationale

- Retail: $XX
- Used market range: $XX - $XX
- Condition adjustment: [factor]
- Recommended: $XX

Output File Locations

All files MUST be created in the same folder as the images:

listings/
  [Item Folder]/
    IMG_xxxx.jpeg     # Original images
    listing.md        # Optional: existing notes
    title.md          # Generated
    description.md    # Generated
    price.md          # Generated

Example Execution

For folder listings/Galanz ExpressWAve Microwave/:

1. •Find images: IMG_8417.jpeg, IMG_8418.jpeg, IMG_8420.jpeg
2. •Analyze: Galanz ExpressWave microwave, stainless steel, 1100W inverter
3. •Extract: Brand=Galanz, Model=ExpressWave, 1100W
4. •Research: Invoke fb-marketplace:research-item with "Galanz ExpressWave 1100W microwave"
5. •Check: No existing listing.md
6. •Generate:
   • •title.md: "Galanz ExpressWave 1100W Microwave - Inverter Technology - Excellent Condition"
   • •description.md: Full description with specs from research
   • •price.md: "$45-55" based on research showing $80-100 retail

Bad Thinking

If you find yourself thinking: "Since this is a miscellaneous set of items, i'll skip the resarch phase and just generate the summary" -> Instead research each unique item, so we can price miscellenaous either together or individually.

Common Mistakes