cEDH Meta Gap

Generate a prompt analyzing your deck against current cEDH meta. Paste into ChatGPT, Claude, or Gemini.

Compare your deck against 1 to 3 EDH Top 16 reference lists for the same commander, generate a strict AI prompt, and paste the returned meta_gap JSON back here for a readable upgrade path.

Step 1 fetches EDH Top 16 reference decks, Step 2 generates the prompt from 1 to 3 selected lists, and Step 3 renders the returned meta_gap JSON.
Save your work in progress to a zip file you can re-import later.
Resume from a saved session (.zip)

Choose a .zip file you previously downloaded from Step 3. This rehydrates the response JSON and jumps back to the meta-gap results step.

Step 1

Load your deck and fetch reference lists

Paste your deck URL or deck export, optionally override the commander name, then pull the top tournament lists for that commander from EDH Top 16.

Your Deck

Required
Moxfield URL support requires the DeckFlow Bridge extension → Install it here

DeckFlow's server cannot reach Moxfield reliably, so Moxfield URLs in this app go through the DeckFlow Bridge extension, which fetches the deck from your logged-in browser. Install it once, allow this site, and every future Moxfield URL import just works.

Download DeckFlow Bridge (.zip) Full install instructions →

  1. Download the ZIP above and unzip it anywhere on your machine.
  2. Load unpacked in Chrome/Edge: open chrome://extensions, enable Developer mode, click Load unpacked, and pick the unzipped deckflow-bridge folder.
  3. Allow this site — open the DeckFlow Bridge Options page and add this DeckFlow origin to the allowed-origins list.
  4. Retry — paste the Moxfield URL here again and submit. The DeckFlow Bridge intercepts automatically.

Can't install? Make the Moxfield deck public, or use Moxfield's Bulk Edit view and paste the deck export text into the text field instead.

Want your Moxfield tags and categories to come through? Use Bulk Edit →

Moxfield's Bulk Edit view lists every card with its #tags inline — copy it, paste it into the text field here, and the tags travel with the deck. No extension required.

  1. Open your deck on moxfield.com.
  2. Click Bulk Edit. The Main Deck tab opens by default, with each card formatted like 1 Card Name (set) cn #Tag #Other.
  3. Copy the Main Deck contents and paste them into the text field here. Run Gap Analysis — tags are preserved end-to-end.

EDH Top 16 Filters

Required

Step 2

Select 1 to 3 reference decks and generate the prompt

Choose 1 to 3 EDH Top 16 entries, build the prompt, then paste it into your AI and request a readable response followed by the fenced meta_gap JSON block.

Analyze with

What you do:
  1. Select 1 to 3 reference decks.
  2. Click Generate Meta Gap Prompt.
  3. Copy 30-meta-gap-prompt.txt.
  4. Paste it into your AI.
  5. Have your AI respond with a readable meta-gap summary first, then a fenced ```json block whose top-level object is meta_gap.
  6. Paste that JSON into Step 3.

Step 3

Paste the returned meta-gap JSON

Paste the fenced JSON block or raw JSON payload that contains the top-level meta_gap object. Extra prose above it is fine.