microsoft / microsoft/react-native-windows
Hermes Debugger Support Planning
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@vmoroz is already working on this.
Since Nov 6, 2025.
enhancement
- Dominant language
- C++
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Description
- Build RNW ( Hermes runtime) with new Fusebox arch for debugger
- To inspect the RNW apps attach correct inspectorTarget and see if we can excahneg CDP message from Devtools
- Figure out what features work and what doesn't so that we can create an exhaustive list of abi_stable apis to implemented.
- Implement Vtable(function pointer tables) for dynamic dispatch serves as a bridge interface between RNW and hermes.dll.
- Implement APIs in RNW to create and configure debugger-enabled Hermes runtime
- Implement the missing and mock APIs above in hermes-windows to be loaded in RNW via hermes.dll using the vtable(function pointer table) .
- Add notifs/messages mech to verify communication btw debugger UI ( cdp) -> hermes runtime -> VM .
- Combine the above and test by creating a RNW app with debugger enable hemres.dll settings.
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