OptionaldialectsEvery applied adapter (composition, amendment 1).
OptionalfilamentsOptionalfilamentSlicer-reported total filament consumption (#183); absent when not emitted.
OptionalmachineOptionalplatesMulti-plate container plates (#306/#3): the discovered plates and which one was parsed into this
IR. Absent for non-container / single-plate sources. One plate is parsed at a time — plates are
never merged into one scene; re-parse with parseOptions.plate to select another.
OptionalprintThe slicer's own print-time estimate (#183); absent when not emitted.
OptionalrawWhitelisted key/value settings only — bounded, never local paths.
Optionalthumbnails
Optional result metadata riding beside the IR (DD-005 §4.2) — no IR schema bump; structured-cloneable across the worker boundary (thumbnail bytes transferable).