Find stock gaps between Shopify and Sage Intacct by SKU

**Objective:** Compare stock on hand in Intacct with available stock in Shopify for `{sku}` (default: every item, up to `{max-items}` items, default 50) and report every SKU where the two differ by at least `{min-difference}` units (default 1).

**Step 1: Read the Intacct items**

If `{sku}` is set, call `intacct-get-item` with `item-id` = `{sku}`. Otherwise call `intacct-get-item` with `status` = active and `max-records` = `{max-items}` (default 50). Keep `item-id`, `item-name`, `item-type` and `on-hand`. Skip items whose `item-type` shows they are not stocked (non-inventory or kit items).

For a per-warehouse view, call `intacct-get-item-warehouse` with the same `item-id` and keep `warehouse-id` and `on-hand`.

**Step 2: Read Shopify stock for each SKU**

For each Intacct `item-id`, call `shopify-get-inventory-level` with `sku` = that item-id. Sum `available` across every location returned. Treat the SKU as matching only on an exact, case-sensitive match; do not trim or pad it.

If Shopify returns nothing, record the item as "in Intacct, not in Shopify" and continue.

**Step 3: Line up locations (optional)**

Call `shopify-get-location` and `intacct-get-warehouse` once each. Where a Shopify location `name` equals an Intacct `warehouse-name`, compare that pair's quantities too. Do not guess a pairing for names that do not match; list them as unpaired.

**Step 4: Report**

A table with columns: SKU, item name, Intacct on hand, Shopify available, difference (Shopify minus Intacct). Include only rows where the absolute difference is at least `{min-difference}` (default 1), sorted by largest absolute difference. Then list SKUs found in only one system, and any unpaired locations or warehouses.

**Rules & Guidelines:**

* `intacct-get-item`, `intacct-get-item-warehouse` and `intacct-get-warehouse` are on the intacct server. `shopify-get-inventory-level` and `shopify-get-location` are on the shopify server.
* This prompt is read-only. Do NOT call `shopify-add-inventory-level`, `intacct-create-order-entry-document` or any other create or update tool on either server.
* Shopify "available" excludes committed stock, so a small positive gap in Intacct is expected for unfulfilled orders. Say so in the report rather than treating it as an error.

**Validation:**

* If `intacct-get-item` returns nothing for `{sku}`, try `shopify-get-product-variant` with `sku` = `{sku}` to confirm it exists in Shopify, report which side it is missing from, and stop.
* If an Intacct item-id matches more than one Shopify inventory item, list the matches and flag the SKU as duplicated in Shopify rather than summing them.