cloudflare/references/tail-workers/api.md

Tail Workers APIs

Fetch the handler reference for current event shapes and language examples instead of maintaining local interface definitions.

Task	Documentation
Implement the handler and understand asynchronous processing	Tail handler syntax
Interpret execution outcomes, logs, exceptions, and timestamps	Tail handler event reference
Inspect request fields and redaction behavior	TailRequest
Interpret events from dynamic dispatch and user Workers	Handler parameters
Write aggregated metrics	Analytics Engine from Tail Workers

Choose the event fields required by the destination and preserve the distinction between execution outcome and HTTP response status. Review what data may be retained before bypassing redaction; the documented heuristics are not a complete application privacy policy. See patterns.md for filter design.