Sumhound — e-commerce platform changes & seller deadlines

List recent seller-facing changes on Amazon, Shopify and/or TikTok Shop, newest first. Use for "what changed on TikTok Shop recently", "any new Amazon fees", "Shopify API updates this month". Each change is curated from the platform's official changelog/announcement and includes a summary, change type, impact types, effective date and the original source URL. Args: platform: Optional platform slug — amazon, shopify or tiktok-shop. Empty = all platforms. limit: Max changes to return, 1-100 (default 10). Returns {generated_at, source, platforms, total, changes:[{id, platform, publishedAt, title, summary, changeType, topics, impactTypes, effectiveAt, deadline, originalUrl}]}. Cite each record's originalUrl when presenting; mention generated_at if freshness matters.

List upcoming seller-facing deadlines on Amazon, Shopify and/or TikTok Shop, soonest first. Use for "any Amazon deadlines coming up", "what do TikTok Shop sellers need to do before month end". Deadlines come from curated official announcements (API sunsets, policy compliance dates, fee effective dates); past deadlines are excluded server-side. Free-form deadlines ("rolling") sort after dated ones. Args: platform: Optional platform slug — amazon, shopify or tiktok-shop. Empty = all platforms. Returns {generated_at, as_of, platforms, total, deadlines:[{id, platform, deadline, title, summary, effectiveAt, originalUrl, ...}]}. `as_of` is the server-side cutoff date used. Cite each record's originalUrl.