Stock Velocity Report

Purpose

Compute stock velocity (units sold per day) for every SKU over a configurable rolling window. Flags fast-movers at risk of stockout and slow-movers consuming storage space. Combines current stock levels with velocity to project days-of-stock-remaining for each product. Read-only — no data is modified.

Prerequisites

• WooCommerce store with REST API enabled
• Consumer Key with Read scope
• Minimum WooCommerce version: 3.5.0

Parameters

Authentication

WooCommerce uses OAuth 1.0a for HTTP and Basic Auth over HTTPS.

For HTTPS stores (recommended):

Authorization: Basic base64(consumer_key:consumer_secret)

For HTTP stores (development only): Use OAuth 1.0a — include oauth_consumer_key, oauth_nonce, oauth_signature, oauth_signature_method=HMAC-SHA1, oauth_timestamp, oauth_version=1.0

Never log or output consumer_key or consumer_secret values.

See docs/AUTHENTICATION.md for full setup instructions.

Safety

Read-only skill — no mutations are executed. Safe to run at any time.

Workflow Steps

Step 1 — Fetch completed orders in the lookback window

GET /wp-json/wc/v3/orders
  ?status=completed&after=<now - lookback_days>&per_page=100&page=1

Aggregate units sold per product_id from line_items.

Step 2 — Fetch current stock for all products

GET /wp-json/wc/v3/products?status=publish&per_page=100&page=1

Extract: id, name, sku, stock_quantity, manage_stock

Step 3 — Compute velocity

For each product:

velocity = units_sold / lookback_days  (units per day)
days_of_stock = stock_quantity / velocity  (if velocity > 0, else ∞)

Step 4 — Classify and export

Classify as: FAST (velocity > fast_mover_threshold), SLOW (< slow_mover_threshold), NORMAL Flag CRITICAL if days_of_stock < low_days_of_stock.

API Endpoints Used

GET  /wp-json/wc/v3/orders              — sales data for velocity calc
GET  /wp-json/wc/v3/products            — current stock levels
GET  /wp-json/wc/v3/reports/top_sellers — supplementary ranking data

Pagination Strategy

WooCommerce REST API uses page/per_page pagination (not cursor-based).

Standard pattern:

page = 1
while True:
  response = GET /endpoint?per_page=100&page=page
  process(response)
  if len(response) < 100: break
  page += 1

Maximum per_page is 100 for most endpoints. The X-WP-Total and X-WP-TotalPages response headers report totals. Always read X-WP-TotalPages on the first request to estimate job size.

Session Tracking

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

STARTUP:

╔══════════════════════════════════════════╗
║  SKILL: woo-stock-velocity-report        ║
║  STORE: <store_url>                      ║
║  TIME:  <ISO-8601 UTC>                   ║
║  MODE:  READ-ONLY                        ║
╚══════════════════════════════════════════╝

PER-OPERATION (emit after each API call batch):

[N/TOTAL] <METHOD> <endpoint> → <result_count> records | params: <key>=<val>

COMPLETION (human format):

╔══════════════════════════════════════════╗
║  COMPLETE: woo-stock-velocity-report     ║
║  RECORDS PROCESSED: <n>                  ║
║  OUTPUT: <filename>                      ║
╚══════════════════════════════════════════╝

COMPLETION (json format):

{
  "skill": "woo-stock-velocity-report",
  "store": "<store_url>",
  "completed_at": "<ISO-8601>",
  "records_processed": <n>,
  "output_file": "<path>",
  "dry_run": false
}

Output Format

CSV filename: woo-stock-velocity-report_<YYYY-MM-DD>.csv Columns: product_id, sku, name, category, units_sold, lookback_days, velocity_per_day, stock_quantity, days_of_stock, classification, critical

Error Handling

Best Practices

• Run weekly to track velocity changes, especially during promotions or seasonal peaks.
• Use critical flag to trigger immediate reorder — these products will stock out before your lead time.
• Combine SLOW classification output with woo-dead-stock-identifier for comprehensive clearance planning.