crw-watch — change tracking and diffing

When to use

• You want to know what changed between two snapshots of a page.
• Step 7 in the crw ladder. Assumes you can already scrape the page — see crw-scrape (step 2).
• You want a self-hosted, stateless diff primitive you control. Firecrawl offers change tracking only as a managed cloud feature; crw exposes the same primitive as a REST endpoint that runs on your own infra — you own the snapshots, the cadence, and the data.

Architecture: crw is stateless

crw stores nothing between calls. The caller owns the snapshots: