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Issue: Data accessor lookup ignores subclasses when matching supported types

Issue: Data accessor lookup ignores subclasses when matching supported types: a task in LegoFlow-SWE (Harbor dataset). When a custom data accessor is registered to handle values of a specific class, the accessor is only returned for values whose type matches exactly —instances of subclasses are…

The task

When a custom data accessor is registered to handle values of a specific class, the accessor is only returned for values whose type matches *exactly*—instances of subclasses are not recognized. For example, if an accessor declares support for `int`, passing an instance of a user-defined class `MyInt(int)` (a subclass…

Part of Lego-X/LegoFlow-SWE.