feat(host): push channel lifecycle through project lobbies (#337)

* feat(host): push channel lifecycle through project lobbies

After each successful publish to the directory, a host diffs its channels
against its previous publication and sends each change (created, renamed,
summarized, archived, resumed, moved, deleted, or a run's end, with the new
listing) to that project's lobby. Each stays queued, latest per channel, until
the lobby echoes it back, and is resent after a reconnect, since a socket can
die unnoticed. A lobby the host no longer needs stays until the next
publication, so a project's last deletion still reaches it.

Teammates' hosts apply events to their directory listings at once and rebuild
listings once per burst, so a replay of thousands of events reads catalogs a
few times, not per event; a directory read already in flight reapplies them,
and a resync reads the directory again.

While every project a host subscribes to has a live lobby and its last publish
succeeded, the 30 s directory poll slows to a 5 min read; changes still
publish immediately, and a change that arrives during a sync runs another.
Activity alone sends no event and reaches teammates through peers or that
read. Without lobbies the poll stays at 30 s. Refs #17, #14.

Why: apps/host/src/lobby.ts#function published | events must be sent only after the directory PUT succeeds, so a teammate that reads the directory on receipt agrees with the event
Why: apps/host/src/directory.ts#function watch | the poll may slow only while every subscribed project's lobby is live and the last publish succeeded; a 404, dropped lobby, or failed PUT must keep the 30 s poll
Why: apps/host/src/directory.ts#function apply | a directory read that started before a lifecycle event must reapply it, or the stale read undoes the push
Why: apps/host/src/lobby.ts#function receive | this host's events stay queued until the lobby echoes them (same channel and at), since a socket can die unnoticed for up to SILENT
Why: apps/host/src/lobby.ts#function update | a lobby no longer wanted must stay until the next publication, or a project's last deletion is never sent
Why: apps/host/src/lobby.ts#function listed | teammates' events rebuild listings once per burst; a replay must never re-read catalogs per event

* lane: sync lobby-lifecycle memory

* lane: sync lobby-lifecycle memory

* lane: sync lobby-lifecycle memory

* lane: sync lobby-lifecycle memory

* lane: sync lobby-lifecycle memory

* lane: sync lobby-lifecycle memory

Author: iamnbutler

.lane/attic/apps/host/src/directory.ts/01M4YSX88PD74Z0WQTMNG5FNPJ-the-poll-may-slow-only-while.md

@@ -0,0 +1,12 @@
+---
+id: 01M4YSX88PD74Z0WQTMNG5FNPJ
+anchor: function watch
+created: 2026-10-15T03:32:48Z
+norm: '1'
+sig: 01895e7ff9a47d37
+body_hash: e498ff76c7097ccb
+raw_hash: e58e16ae5b37f605
+lines: 89-148
+---
+
+the poll may slow only while every subscribed project's lobby is live; a 404 or dropped lobby must keep the 30 s poll

…0CWEPTZV-refresh-diagnostics-sync-joi.md …0CWEPTZV-refresh-diagnostics-sync-joi.md.lane/memory/apps/host/src/directory.ts/01M4YX72ZF09QKX1XJ0CWEPTZV-refresh-diagnostics-sync-joi.md renamed to .lane/attic/apps/host/src/directory.ts/01M4YX72ZF09QKX1XJ0CWEPTZV-refresh-diagnostics-sync-joi.md .lane/memory/apps/host/src/directory.ts/01M4YX72ZF09QKX1XJ0CWEPTZV-refresh-diagnostics-sync-joi.md renamed to .lane/attic/apps/host/src/directory.ts/01M4YX72ZF09QKX1XJ0CWEPTZV-refresh-diagnostics-sync-joi.md

@@ -0,0 +1,12 @@
+---
+id: 01M4YSX88YQ6XNNRA7NZD729XT
+anchor: function apply
+created: 2026-10-15T03:32:48Z
+norm: '1'
+sig: 952447435beb8f3b
+body_hash: aab39324170917ad
+raw_hash: 7c1c5d4a8207184b
+lines: 58-61
+---
+
+a directory read that started before a lifecycle event must reapply it, or the stale read undoes the push

.lane/memory/apps/host/src/directory.ts/01M4YSX88YQ6XNNRA7NZD729XT-a-directory-read-that-starte.md

@@ -0,0 +1,13 @@
+---
+id: 01M4YWKAGD3FTMWYWE1KVXT9Q1
+anchor: function watch
+created: 2026-10-15T04:19:48Z
+norm: '1'
+sig: 01895e7ff9a47d37
+body_hash: 427b4a824965c455
+raw_hash: 051c8317452a26a4
+vouched: 2026-10-15T10:22:45Z
+lines: 89-149
+---
+
+the poll may slow only while every subscribed project's lobby is live and the last publish succeeded; a 404, dropped lobby, or failed PUT must keep the 30 s poll

.lane/memory/apps/host/src/directory.ts/01M4YWKAGD3FTMWYWE1KVXT9Q1-the-poll-may-slow-only-while.md

@@ -0,0 +1,13 @@
+---
+id: 01M4ZHBX7QSQ80PQ8ZKSCK37JC
+anchor: const sync
+created: 2026-10-15T10:22:45Z
+norm: '1'
+sig: 949f14184cef9b55
+body_hash: ebd35c8e35a08bcf
+raw_hash: 9df0f7c1d50b6827
+lines: 220-223
+supersedes: 01M4YX72ZF09QKX1XJ0CWEPTZV
+---
+
+Refresh (diagnostics sync), a directory change, and the heartbeat join an in-flight sync for the same URL; only a channel change queues one follow-up sync, since the running one may have read channels before it. A sync for an old URL never holds a directory change, which keeps Join/Change/Leave from waiting on a keychain prompt

.lane/memory/apps/host/src/directory.ts/01M4ZHBX7QSQ80PQ8ZKSCK37JC-refresh-diagnostics-sync-a-d.md

@@ -4,9 +4,9 @@ anchor: function serve
 created: 2026-10-15T03:39:45Z
 norm: '1'
 sig: 9102a6912d6b112c
-body_hash: 6ab7352408aef66a
-raw_hash: 263349ca929c8f26
-vouched: 2026-10-15T10:17:10Z
+body_hash: efe18941bbea238a
+raw_hash: 68e7635dd1eeb140
+vouched: 2026-10-15T10:22:50Z
 lines: 668-751
 ---
 

.lane/memory/apps/host/src/gateway.ts/01M4YT9Z8YJ2ZWZCVB752WDCFF-workers-and-agent-shells-fin.md

@@ -4,8 +4,9 @@ anchor: function serve
 created: 2026-10-15T10:17:10Z
 norm: '1'
 sig: 9102a6912d6b112c
-body_hash: 6ab7352408aef66a
-raw_hash: 263349ca929c8f26
+body_hash: efe18941bbea238a
+raw_hash: 68e7635dd1eeb140
+vouched: 2026-10-15T10:22:50Z
 lines: 830-948
 supersedes: 01M4Z2R1HEVDKEA8VEJ7XRJQ8F
 ---

.lane/memory/apps/host/src/gateway.ts/01M4ZH1NMBK54TCB970R3AJ1X1-a-loopback-host-must-not-cal.md

@@ -4,8 +4,9 @@ anchor: function update
 created: 2026-10-15T03:29:13Z
 norm: '1'
 sig: 8a0d2e97c61d3b2a
-body_hash: 58eec371bac94f06
-raw_hash: 9536211278b6a5e1
+body_hash: 9d97e7ca6f446b19
+raw_hash: 16839cd70b817237
+vouched: 2026-10-15T04:19:51Z
 lines: 135-164
 ---
 

.lane/memory/apps/host/src/lobby.ts/01M4YSPPFHAKTZ9ZN784YH431C-lobby-subscriptions-must-not.md

@@ -0,0 +1,13 @@
+---
+id: 01M4YSX88ENYGZDM1AWFYJQZCF
+anchor: function published
+created: 2026-10-15T03:32:48Z
+norm: '1'
+sig: f41cc449f904a732
+body_hash: fc3b5666ab1b7f61
+raw_hash: 5c41e63f4e355fb8
+vouched: 2026-10-15T04:19:48Z
+lines: 163-186
+---
+
+events must be sent only after the directory PUT succeeds, so a teammate that reads the directory on receipt agrees with the event

.lane/memory/apps/host/src/lobby.ts/01M4YSX88ENYGZDM1AWFYJQZCF-events-must-be-sent-only-aft.md

@@ -0,0 +1,12 @@
+---
+id: 01M4YWKAH0WM7TQT3FN8CKNJM5
+anchor: function receive
+created: 2026-10-15T04:19:48Z
+norm: '1'
+sig: 75d6998d076e5f0f
+body_hash: 7e73e7a02213b7b5
+raw_hash: c859d05ea4ef1c3a
+lines: 182-206
+---
+
+this host's events stay queued until the lobby echoes them (same channel and at), since a socket can die unnoticed for up to SILENT