Top-Level fields

Strategy Definition field	MesoLive support	Notes
MesoSimVersion	Used	Must be v3+ (validated during import).
StrategyName	Supported	Used as the default strategy name during import; can be overwritten.
Description	Supported	Used as the default strategy description during import; can be overwritten.
Backtest.Name	Ignored	Backtest metadata is not used for live execution.
Backtest.Start	Ignored	Live runs on real time (wall-clock).
Backtest.End	Ignored	Live runs on real time (wall-clock).
Backtest.Cash	Ignored	Live uses the real-time account NAV via the `nav` variable.
Symbol	Supported	Used as the default underlying in the Build flow, but you can change it per position.
Structure	Supported	See Structure.
Entry	Supported	See Entry.
Adjustment	Supported	See Adjustments.
Exit	Supported	See Exit.
ExternalData	Supported	Loaded from CSV and refreshed periodically (typically ~1 minute). See External Data.
Settings	Supported	Many sim-only settings are ignored; some “core” knobs are overridden by MesoLive UI controls. See Settings.