ARCHIVED TRAINING / caikit/caikit
caikit__caikit-233
This is a preserved training example. Membership in the current training wave has not been verified.
Problem statement
Support Functional Inheritance
## Describe the bug
When creating a `class` that inherits from a `DataObjectBase` and overrides parent functions without adding or changing any of the schema, an exception is raised:
```
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "/Users/ghart/Projects/github/caikit/caikit2/caikit/core/data_model/dataobject.py", line 88, in __new__
raise TypeError(
TypeError: All DataObjectBase classes must follow dataclass syntax
```
## Sample Code
```py
from caikit.core import DataObjectBase, dataobject
@dataobject
class Base(DataObjectBase):
foo: int
def doit(self):
return self.foo * 2
@dataobject
class Derived(Base):
def doit(self):
return self.foo * 3
```
## Expected behavior
```py
b_inst = Base(1)
assert b_inst.doit() == 2
d_inst = Derived(1)
assert d_inst.doit() == 3
```
## Observed behavior
```
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "/Users/ghart/Projects/github/caikit/caikit2/caikit/core/data_model/dataobject.py", line 88, in __new__
raise TypeError(
TypeError: All DataObjectBase classes must follow dataclass syntax
```
## Additional context
This will be very important for allowing content libraries to share common data structures with custom backend, construction, and functional interfaces
Training membership
opd_e4b_cispo_v5 opd_e4b_pure_v6a opd_e4b_pure_v6b opd_e4b_pure_v7 opd_e4b_pure_v7b opd_e4b_self_audit_v4
Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.
Task and snapshot provenance
Snapshot captured 2026-11-12T17:06:59.476467+00:00 · Autoresearch-Arena/gemma-4-developer-agent
{
"datasets": [
"opd_e4b_cispo_v5",
"opd_e4b_pure_v6a",
"opd_e4b_pure_v6b",
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"opd_e4b_pure_v7b",
"opd_e4b_self_audit_v4"
],
"examples": 33,
"instance_id": "caikit__caikit-233",
"problem_statement": "Support Functional Inheritance\n## Describe the bug\r\n\r\nWhen creating a `class` that inherits from a `DataObjectBase` and overrides parent functions without adding or changing any of the schema, an exception is raised:\r\n\r\n```\r\nTraceback (most recent call last):\r\n File \"<stdin>\", line 2, in <module>\r\n File \"/Users/ghart/Projects/github/caikit/caikit2/caikit/core/data_model/dataobject.py\", line 88, in __new__\r\n raise TypeError(\r\nTypeError: All DataObjectBase classes must follow dataclass syntax\r\n```\r\n\r\n## Sample Code\r\n\r\n```py\r\nfrom caikit.core import DataObjectBase, dataobject\r\n\r\n@dataobject\r\nclass Base(DataObjectBase):\r\n foo: int\r\n def doit(self):\r\n return self.foo * 2\r\n\r\n@dataobject\r\nclass Derived(Base):\r\n def doit(self):\r\n return self.foo * 3\r\n```\r\n\r\n## Expected behavior\r\n\r\n```py\r\nb_inst = Base(1)\r\nassert b_inst.doit() == 2\r\n\r\nd_inst = Derived(1)\r\nassert d_inst.doit() == 3\r\n```\r\n\r\n## Observed behavior\r\n\r\n```\r\nTraceback (most recent call last):\r\n File \"<stdin>\", line 2, in <module>\r\n File \"/Users/ghart/Projects/github/caikit/caikit2/caikit/core/data_model/dataobject.py\", line 88, in __new__\r\n raise TypeError(\r\nTypeError: All DataObjectBase classes must follow dataclass syntax\r\n```\r\n\r\n## Additional context\r\n\r\nThis will be very important for allowing content libraries to share common data structures with custom backend, construction, and functional interfaces",
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}{
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"membership": "archived training",
"membership_evidence": "Task issues extracted from preserved verified_rft_messages training examples. This is not a verified current RL wave manifest.",
"name": "Preserved post-training task archive",
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}