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## Summary Opening an uncached community seeded each previously unseen channel's read marker separately. Every seed copied and serialized the full read-state snapshot, started three preference writes, and notified listeners. Home now collects those seeds and saves/emits once, using the existing monotonic marker admission rules. For a 400-channel fixture with one existing marker, initial seeding falls from 399 full snapshot saves to one. Existing unread frontiers, local-only seeds and explicit read publishing keep their behavior. No transport, cache, relay or unread eligibility changes. This is independent of #8580 and #8490. ## Validation - `just mobile-install mobile-check mobile-test`: clean analysis; 3,779 tests passed, 19 skipped, plus four checks for builds without push configuration. - Real Home/channel-provider/read-state journey covers 400 channels, preservation of an existing unread highlight, persisted marks, no seed publication, and no repeated seed save on refresh. It replaces the earlier fake-notifier seed test. - Restoring the old per-channel loop makes the new journey fail at the single-snapshot assertion. - Diff and file-size checks pass. - Merged current main (`209fcd217`) at `d34d29627`; retained both the cold read-seeding and cached-community landing test registrations. The production diff is byte-for-byte unchanged from the version reviewed by the Court at `6a232ed37`. The complete mobile gates above passed again on the merged tree. Device latency is unmeasured. The Court source review found no blockers at `6a232ed37`; app/device testing and human acceptance remain unconfirmed. To try: open a community without a saved channel list, confirm its channels load and existing unread highlights remain correct, then refresh and reopen it. The performance claim here is reduced save work, not a measured end-to-end speedup. Signed-off-by: Wes <wesbillman@users.noreply.github.com> Co-authored-by: Star Lord <b89298dbe87c6b3fd8a425b535d9d161f23c88d555a47925ae0b04dfe02b201e@buzz.block.builderlab.xyz>