Removes the zep-cloud dependency entirely and replaces it with a
local file-based graph store (LocalGraphStore) that persists nodes,
edges, and episodes as JSON files under uploads/graphs/{graph_id}/.
- Add backend/app/utils/local_graph_store.py: thread-safe JSON store
with keyword search, node upsert, and episode append
- Rewrite graph_builder.py: LLM-based entity/relationship extraction
from text batches, stored locally instead of sent to Zep Cloud
- Rewrite zep_graph_memory_updater.py: agent activities written as
episodes + searchable fact edges in local JSON
- Rewrite zep_entity_reader.py: reads nodes/edges from local JSON
- Rewrite zep_tools.py: keyword search on local JSON replaces
Zep semantic search; _local_search is now the primary path
- Update oasis_profile_generator.py: local store replaces Zep client
for entity context enrichment
- Update ontology_generator.py: generated code template uses
pydantic BaseModel instead of Zep EntityModel/EdgeModel
- Convert zep_paging.py to a no-op stub (pagination not needed)
- Remove ZEP_API_KEY from config.py, add GRAPH_STORAGE_DIR
- Remove ZEP_API_KEY guards from api/graph.py and api/simulation.py
- Remove zep-cloud==3.13.0 from requirements.txt and pyproject.toml
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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