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:core:protocol — summary-side patch path ported from the web reference: - wire/SummaryPatching.kt: patchSessionSummary port with the summary path's >= versioned gates (replicated web divergence vs the detail path's strict >, documented), derived-field recompute (pendingRequestsCount/Kinds/Requests capped 5, todoProgress), render-irrelevance filter (activeAt-only keep-alive suppression), toSessionSummary/toSessionSummaryMetadata projection, and the deprecated canApplyVersionedSummaryPatch legacy gate. - wire/SessionSorting.kt: exact sortSessionSummaries comparator (globalPinned > pinned > active > pendingRequestsCount among active > updatedAt desc; Long-safe, stable). - SessionMetadata grows the per-flavor agent session id fields the agentSessionId projection needs. :core:data store/ — StateFlow stores with per-hub JSON snapshots: - JsonSnapshotStore: debounced (500 ms) atomic tmp+fsync+rename snapshots, synchronous cold-start load, corrupt files degrade to null. - SessionStore: sorted summary list + per-id detail cache (strict-> detail patching via SessionPatching), full-session upsert preserving hub-computed scheduled fields, REST fallback for unparseable payloads, coalesced refresh (16 ms batch like the web), optimistic pin/archive. - MachineStore: full/patch/null machine-updated decision tree per sse.md. - LastSeenStore: per-session last-seen watermarks + once-per-scope baseline seeding + unread derivation (sessionLastSeen.ts/sessionAttention.ts port). - StoreSyncTargets: SyncEventRouter fan-in — global-scope message-stream events refresh the list, gap handshakes full-resync. :app feature/sessions/ — standalone screen + plain-constructor ViewModel: - SessionListScreen: pinned section, status dot with thinking pulse, flavor/ machine/worktree meta line, pending badge, todo chip, unread dot, machine filter chips, PullToRefreshBox, offline banner, empty states, long-press pin/archive sheet; taps emit onOpenSession only (no navigation). - SessionListViewModel: store combine -> UiState, owns the global SSE subscription while started (subscribe after collector registration), entry refresh, error SharedFlow for snackbars. Tests: SummaryPatching/SessionSorting JVM tests (cases mined from useSSE.test.ts), store tests (stale/equal/newer patches, full replace, keep-alive identity, snapshot round-trips, optimistic rollback), ViewModel combine + handshake tests with fake stores. All of :core:protocol:test, :core:data:test, :app:testDebugUnitTest, :app:assembleDebug green.