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Forewarn watches public web pages — competitor pricing, product changelogs, news, regulatory docs, anything — and tells you in one sentence when something meaningful ships. You add URLs, Forewarn renders and extracts them on a schedule, diffs them against the previous snapshot, and emails you a summary. Slack delivery is in the works.

The explicit goal is to be ignorable: quiet when nothing matters, loud exactly when something does.

1. Create an account. Free plan includes 5 URLs.
2. Go to Dashboard and add a source + a URL to watch.
3. Add a destination in Settings. Email alerts ship today; you can also paste a Slack incoming webhook (delivery coming soon).
4. That's it. Forewarn will start checking on the next scheduled tick and notify you when a meaningful change lands.

Forewarn tunes its classifier per page type. When you add a URL, it's auto-classified into one of:

• pricing — plan names, prices, feature bullets.
• changelog — new entries or major version bumps.
• blog — new posts only; unchanged listings ignored.
• careers — new roles appearing or disappearing.
• other — generic diff-based classification.

You can pick the page type when adding a URL — useful for pages that look like one thing but behave like another (e.g. a pricing FAQ). If auto-detection guesses wrong, delete and re-add with the correct type.

Each URL is assigned a bucket: every 15 min, hourly, every 4 hours, or daily (default). Each bucket runs on its own schedule; the dispatcher claims any page whose tick has come due and queues it for checking.

Fetches run in a real Chromium browser via Playwright, so JS-rendered pages work the same as static ones. Requests identify themselves as ForewarnBot.

Every diff is labeled meaningful, minor, or ignore with a confidence score. Only meaningful changes trigger notifications.

The underlying rules — with examples — are:

• pricing: number, plan-name, or feature-bullet change → meaningful; layout-only reflows → minor.
• careers: new role → meaningful; role removed → minor.
• blog / changelog: new post or entry → meaningful; edits to existing posts are usually minor unless the substance changed.
• CSS classes, whitespace, build/asset hashes, CSRF tokens, analytics IDs, server-render timestamps, "last updated" indicators that move on their own → ignore.

Add as many destinations as your plan allows in Settings.

• Email — pending alerts are batched and sent every 5 minutes. One email per meaningful change.
• Slack — you can save an incoming webhook URL today, but Slack delivery isn't shipped yet. Coming soon.