* feat(agents): default to eager delegation in the main session
The delegation prompt section now defaults to "prefer" in each agent's
canonical main session and "suggest" elsewhere; explicit config wins in
both directions. The section is rewritten to be token-leaner and now
covers the hidden-vs-visible spawn distinction (hidden subagents are
invisible and auto-archived; deliverable-bearing work spawns
visible=true and replies with the link) plus the run-end notification
contract. The Messaging spawn-mechanics line is suppressed when the
Delegation section renders, and the stable Tooling visible:true hint is
aligned with the new guidance.
* perf(sessions): coalesce session-state wake bursts
Watched-session change notices woke the watcher's main session with the
generic 250ms heartbeat coalesce, so a burst of changes across several
watched sessions produced one wake per change. Wakes now coalesce for
20s; notices are already queued and deduped, so none are lost.
* test(agents): regenerate prompt snapshots after rebase
* test(sessions,agents): update sibling assertions for coalesced wakes and visible guidance
session-state-events tests advance timers past the new 20s wake
coalesce window; the sessions_spawn schema test tracks the updated
visible description.
Peter Steinberger
7f0a87de1d