shopify-admin-low-inventory-restock

What this skill does

## Purpose
Queries all tracked product variants at or below a configurable stock threshold and exports a restock CSV grouped by vendor. By pulling live inventory counts directly from the Shopify Admin API and sorting results by vendor name, this skill gives procurement teams an immediately actionable reorder list without manual exports from the Shopify admin inventory view.

## Prerequisites
- Authenticated Shopify CLI session: `shopify auth login --store <domain>`
- API scopes: `read_products`, `read_inventory`

## Parameters

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| store | string | yes | — | Store domain (e.g., mystore.myshopify.com) |
| format | string | no | human | Output format: `human` or `json` |
| dry_run | bool | no | false | Preview operations without executing mutations |
| threshold | integer | no | 10 | Variants at or below this quantity are included |
| location_id | string | no | — | GID of a specific location to filter by (optional; if omitted, uses `inventoryQuantity` across all locations) |
| include_zero_stock | bool | no | true | Include variants with 0 quantity |

## Workflow Steps

1. **OPERATION:** `productVariants` — query
   **Inputs:** `first: 250`, `query: "inventory_quantity:<= <threshold>"`, pagination cursor
   **Expected output:** List of variant objects with inventoryQuantity, product title, vendor, SKU; paginate until `hasNextPage: false`

## GraphQL Operations

```graphql
# productVariants:query — validated against api_version 2025-01
query LowInventoryVariants($first: Int!, $after: String, $query: String) {
  productVariants(first: $first, after: $after, query: $query) {
    edges {
      node {
        id
        title
        sku
        inventoryQuantity
        product {
          id
          title
          vendor
        }
        inventoryItem {
          id
          tracked
        }
      }
    }
    pageInfo {
      hasNextPage
      endCursor
    }
  }
}
```

## Session Tracking

**Claude MUST emit the following output at each stage. This is mandatory.**

**On start**, emit:
```
╔══════════════════════════════════════════════╗
║  SKILL: low-inventory-restock                ║
║  Store: <store domain>                       ║
║  Started: <YYYY-MM-DD HH:MM UTC>             ║
╚══════════════════════════════════════════════╝
```

**After each step**, emit:
```
[N/TOTAL] <QUERY|MUTATION>  <OperationName>
          → Params: <brief summary of key inputs>
          → Result: <count or outcome>
```

**On completion**, emit:

For `format: human` (default):
```
══════════════════════════════════════════════
OUTCOME SUMMARY
  Variants below threshold:  <n>
  Unique products:            <n>
  Vendors:                    <n>
  Errors:                     0
  Output:                     restock_list_<date>.csv
══════════════════════════════════════════════
```

For `format: json`, emit:
```json
{
  "skill": "low-inventory-restock",
  "store": "<domain>",
  "started_at": "<ISO8601>",
  "completed_at": "<ISO8601>",
  "dry_run": false,
  "steps": [
    { "step": 1, "operation": "LowInventoryVariants", "type": "query", "params_summary": "threshold <= 10, all locations", "result_summary": "<n> variants", "skipped": false }
  ],
  "outcome": {
    "variants_below_threshold": 0,
    "unique_products": 0,
    "vendors": 0,
    "errors": 0,
    "output_file": "restock_list_<date>.csv"
  }
}
```

## Output Format
CSV file `restock_list_<YYYY-MM-DD>.csv` grouped by vendor, sorted by vendor name then product title. Columns: `vendor`, `product_title`, `variant_title`, `sku`, `current_stock`.

## Error Handling
| Error | Cause | Recovery |
|-------|-------|----------|
| No variants returned | All variants are above threshold or inventory not tracked | Lower threshold or verify `inventoryItem.tracked: true` |
| `location_id` not found | Invalid location GID | Retrieve valid location IDs via Shopify admin |
| Rate limit (429) | Too many paginated requests | Reduce `first` to 100 and retry |

## Best Practices
1. Run without `location_id` first to get store-wide low stock; then filter by location if you operate multiple warehouses.
2. Only variants with `inventoryItem.tracked: true` have meaningful stock counts — untracked variants always appear as 0.
3. The restock CSV is sorted by vendor — share the vendor-grouped output directly with your procurement team without reformatting.
4. Set `include_zero_stock: false` to skip variants already on back-order to focus on nearly-depleted items.
5. Schedule this skill to run weekly via cron and pipe the CSV to your purchasing workflow.