feat: support reference mutation through IPC#4
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wellwelwel
previously approved these changes
Mar 17, 2026
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Problem
When running as a child process, calling a shared resource method that mutates a reference argument (e.g. pushing into an array, updating an object property) had no effect on the caller's local variable. Arguments are serialized over IPC to the parent, where a copy gets mutated — but the original reference in the child was never updated.
Solution
After each remote procedure call, the parent now sends back the post-call state of all arguments (
mutatedArgs). The child-side proxy then reconciles each original reference in-place using a newwriteBackutility.