Bug Description

Several legacy exports are still listed in llama_index.core.__all__, but are no longer actually bound at runtime.

This causes import failures for names that appear to be part of the public API, for example:

from llama_index.core import GPTKnowledgeGraphIndex
from llama_index.core import SummaryPrompt
from llama_index.core import *

At runtime, these currently fail because:

• GPTKnowledgeGraphIndex is listed in llama_index.core.indices.__all__, but is not actually imported/bound there
• legacy prompt aliases such as SummaryPrompt, TreeInsertPrompt, RefinePrompt, etc. exist in llama_index.core.prompts.prompts, but are not re-exported through llama_index.core.prompts or llama_index.core

This also means from llama_index.core import * can fail with AttributeError because __all__ references names that are missing from the module object.

Version

0.14.18

Steps to Reproduce

1. Create a clean environment and install/import llama-index-core
2. Run:

from llama_index.core import GPTKnowledgeGraphIndex

3. Run:

from llama_index.core import SummaryPrompt

4. Run:

from llama_index.core import *

Relevant Logs/Tracbacks

ImportError: cannot import name 'GPTKnowledgeGraphIndex' from 'llama_index.core'
ImportError: cannot import name 'SummaryPrompt' from 'llama_index.core'
AttributeError: module 'llama_index.core' has no attribute 'GPTKnowledgeGraphIndex'