Add LangChain 1.x support #75
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## Breaking Changes - Python 3.10+ required (dropped Python 3.9 support) - Requires langchain-core>=1.0.0,<2.0.0 - Requires langchain>=1.0.0,<2.0.0 - Requires langchain-openai>=1.0.0,<2.0.0 ## Test Summary | Test Suite | Passed | Total | |------------|--------|-------| | Unit Tests | 35 | 35 | | Integration Tests | 66 | 67 | | **Total** | **101** | **102** | ## Compatibility Testing ### LangChain 1.1.0 (Target Version) ``` langchain==1.1.0 langchain-core==1.1.0 langchain-openai==1.1.0 ``` - Unit tests: 35/35 passed (100%) - Integration tests: 66/67 passed (98.5%) ### LangChain 0.3.x (Backwards Compatibility Verified) ``` langchain==0.3.27 langchain-core==0.3.80 langchain-openai==0.3.35 ``` - Unit tests: 35/35 passed (100%) - Verified backwards compatibility works ## New Integration Test Files 1. **test_langchain_compatibility.py** (17 tests) - Basic invoke, streaming, async - Tool calling (single, multiple) - Structured output (function calling, JSON mode) - Response format tests - LangChain 1.x specific API tests 2. **test_chat_features.py** (16 tests) - LCEL chain tests (simple, with history, batch) - Async chain invocation - Streaming through chains - Tool calling in chain context - Structured output extraction - Model configuration tests - Conversation pattern tests 3. **test_multi_model.py** (33 tests) - Meta Llama models (4-scout, 4-maverick, 3.3-70b, 3.1-70b) - xAI Grok models (grok-3-70b, grok-3-mini-8b, grok-4-fast) - OpenAI models (gpt-oss-20b, gpt-oss-120b) - Cross-model consistency tests - Streaming tests across vendors ## Models Tested (Real OCI Inference - Chicago Region) ### Meta Llama | Model | Basic | Streaming | Tool Calling | Structured Output | |-------|-------|-----------|--------------|-------------------| | meta.llama-4-scout-17b-16e-instruct | ✅ | ✅ | ✅ | ✅ | | meta.llama-4-maverick-17b-128e-instruct-fp8 | ✅ | ✅ | ✅ | ✅ | | meta.llama-3.3-70b-instruct | ✅ | ✅ | ✅ | ✅ | | meta.llama-3.1-70b-instruct | ✅ | ✅ | ✅ | ✅ | ### xAI Grok | Model | Basic | Streaming | Tool Calling | Structured Output | |-------|-------|-----------|--------------|-------------------| | xai.grok-3-70b | ✅ | ✅ | ✅ | ✅ | | xai.grok-3-mini-8b | ✅ | ✅ | ✅ | ✅ | | xai.grok-4-fast-non-reasoning | ✅ | ✅ | ✅ | ✅ | ### OpenAI | Model | Basic | Streaming | Tool Calling | Structured Output | |-------|-------|-----------|--------------|-------------------| | openai.gpt-oss-20b | ✅ | ✅ | ✅ | ✅ | | openai.gpt-oss-120b | ✅ | ✅ | ✅ | ✅ | ## Code Changes - pyproject.toml: Updated dependencies to LangChain 1.x - test_tool_calling.py: Fixed import (langchain.tools -> langchain_core.tools) - test_oci_data_science.py: Updated stream chunk count assertion for LangChain 1.x
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Additional Test EvidenceUnit Test Output (LangChain 1.1.0)Integration Test Output (Real OCI Inference)test_langchain_compatibility.pytest_chat_features.pytest_multi_model.pyBackwards Compatibility Test (LangChain 0.3.x)Test Environment
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Review Request (Active Contributors)@YouNeedCryDear @paxiaatucsdedu @furqan-shaikh-dev - Would appreciate your review on this LangChain 1.x upgrade PR. |
- Update pytest to ^8.0.0 (required by pytest-httpx) - Update pytest-httpx to >=0.30.0 (compatible with httpx 0.28.1) - Update langgraph to ^1.0.0 (required by langchain 1.x) - Regenerate poetry.lock
- Remove main() functions with print statements - Fix import sorting issues - Remove unused imports - Fix line length violations - Format code with ruff
langchain-core 1.1.0 introduced ModelProfileRegistry which is required by langchain-tests 1.0.0. Update minimum version constraint to ensure CI resolves to a compatible version.
- Update bind_tools signature to match BaseChatModel (AIMessage return, tool_choice parameter) - Add isinstance checks for content type in integration tests - Remove unused type: ignore comments - Add proper type annotations for message lists - Import AIMessage in oci_data_science.py
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#66 |
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Thanks for the pointer @YouNeedCryDear! I reviewed PR #66 by @joseph-klein. Comparison: PR #75 vs PR #66
Key DifferencesPR #75 (this PR) - Laser-Focused Upgrade:
PR #66 - Combined Upgrade + Refactoring:
My RecommendationI believe smaller, focused PRs are easier to review and safer to merge. This PR (#75) intentionally does the minimum required for LangChain 1.x compatibility without bundling unrelated changes. If there are legitimate bug fixes in PR #66 (like the escaped JSON parsing), those could be submitted as a separate PR to keep concerns separated. @joseph-klein - Happy to collaborate! If you have specific fixes that should be included, we could coordinate. My goal was to keep this upgrade as low-risk as possible with extensive test coverage to validate nothing broke. |
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Summary
This PR upgrades langchain-oci to support LangChain 1.x (specifically tested with 1.1.0) and adds comprehensive integration tests to ensure compatibility.
Key Changes:
Breaking Changes
Test Evidence
Test Summary
Compatibility Testing
LangChain 1.1.0 (Target Version)
LangChain 0.3.x (Backwards Compatibility)
New Integration Test Files
Models Tested (Real OCI Inference - Chicago Region)
Meta Llama
xAI Grok
OpenAI (OCI-hosted)
Code Changes
pyproject.toml
test_tool_calling.py
langchain.tools→langchain_core.toolstest_oci_data_science.py
Test Plan