Per-feature pages (install, quickstart, permissions, chats, history,
watch, send, groups, attachments, json, rpc, completions, advanced-imcore,
troubleshooting) plus an Apple-styled static-site builder rendering them
to dist/docs-site. GitHub Pages workflow deploys on every docs/ change to
imsg.sh.
This field helps distinguish between messages actually sent by the local
user vs messages received on a secondary phone number registered with
the same Apple ID.
When is_from_me is true but destination_caller_id differs from the
user's own numbers, the message was actually received from another
device/person messaging that secondary number.
This enables tools like Clawdbot to properly detect inbound messages
on secondary iMessage phone numbers.
