Threads anchored to an address, each with a chain of messages
(user/assistant/system). Notes carry editors[], messages carry
a single immutable author. rebuildAddressAnnotations folds note
counts into the gutter so the UI can render breadcrumbs.
Workspace is now a thin host adapter. Engine owns sessions and
notebook entries (via store observation), GitHub auth + OAuth
device flow, hook-pack discovery, address annotations and address
actions, the disassembler cache, and all instrument lifecycle.
EventLog is @Observable so SwiftUI tracks it directly; the host
no longer mirrors event arrays or version counters.
R2 (live disassembly + trace inspection) lives entirely in
LumaCore as concrete Disassembler / TraceDisassembler classes
returning portable StyledText spans. ProcessNodeViewModel and
InstrumentRuntime are gone; views read engine.processNodes /
node.instruments / engine.descriptor(for:) directly.
Reorganize Luma/Models/ — instrument UI dispatch lives under
Luma/Instruments/, Monaco editor glue under Luma/Editor/, and the
remaining UI types sit at the top of Luma/.