share(item, to?) as a route and an MCP tool. No target: route to the item's app crew and owners, then org members who follow the app, then anyone named. Every recipient passes canRead; a share never widens access.
Share to an agent becomes a tell/steer through existing routes; to a person, a boosted feed item with a "shared by X" reason.
Noise control: daily share budget per recipient, over-budget shares queued and decaying, dedupe per item, sender weight by past share-to-open rate, mute as a strong negative. Humans and agents both may share.
Tests: no access widening, budget, dedupe, agent routing.
Part of #351. Needs the feed model.
share(item, to?)as a route and an MCP tool. No target: route to the item's app crew and owners, then org members who follow the app, then anyone named. Every recipient passescanRead; a share never widens access.