Validation

All of the following are rejected at startup with a descriptive error and a non-zero exit code — chime never partially starts.

General

Unknown fields anywhere in the TOML
tick_interval_sec outside 1..=60
Unknown IANA timezone
Webhook env var unset, empty, or not a valid https URL
Two different webhook names that map to the same env var (e.g. team-a and team_a)
thread_id that is empty, not all digits, zero or beyond 64 bits (or written as a TOML integer)
Neither reminders, status pages, watches nor rss feeds defined
poll_interval_sec outside 60..=3600

Duplicate or empty status page name
Status page url or avatar_url that is not https, or has no host
Status page kind that is not one of statuspage / instatus / incidentio / datadog / custom
custom status page without mapping, or mapping on a page of any other kind
mapping without id or title, with an unknown key, or with a pointer that does not start with /
min_impact that is not one of none / maintenance / minor / major / critical

Duplicate or empty watch name
source.kind that is not firefox / chrome / json, or an unknown key inside source
firefox.channel / chrome.platform / chrome.channel / chrome.rollout outside their listed values
chrome watch with channel = "extended" on linux, android, webview or ios — Extended Stable exists only for win, win64, mac and mac_arm64, and the API rejects the rest
json watch whose url / link is not https, or whose pointer does not start with /