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langchain-ai/langchain

2,796 files 19 languages 411,720 total lines @1a43a6e analysed just now
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01Overview

langchain · 329,291 lines of actual code
2,796
Files
329,291
Code lines
39,917
Comments
19
Languages
17,429
Complexity
0
Secrets
Line Composition 411,720 total lines
Code329,29180.0%
Blank42,51210.3%
Comments39,9179.7%
~99%
tokens saved
Reading langchain-ai/langchain via an LLM
~2.3M tokens → ~1.4k tokens via code_analyze

The entire repo summarised by code_analyze — structured JSON in <2k tokens. The dossier above is built from one call. Drill into specifics with code_search.

02Languages & Tech Stack

what it’s written in, what it depends on

Language Breakdown

Language
Files
Code
Share
Python
2,536
310,764
94.4%
JSON
45
5,642
1.7%
YAML
47
5,543
1.7%
TOML
29
2,793
0.8%
Markdown
29
1,248
0.4%
Makefile
23
1,123
0.3%
License
22
374
0.1%
Shell
21
304
0.1%
JavaScript
2
235
0.1%
+ 10 more
—
559
·

Tech Stack  (47 detected)

LangChain 2034 pytest 340 Pydantic 272 unittest.mock / mock 57 OpenAI SDK 20 HTTPX 20 NumPy 18 Requests 11 PyYAML 11 Hugging Face Transformers 4 Anthropic SDK 3 Pandas 3 NLTK 3 Fire 2 python-dotenv 2 Hugging Face Datasets 1 SQLAlchemy 1 Playwright (Python) 1 redis-py (Redis) 1 Scikit-learn 1 Uvicorn 1 Elasticsearch Client 1 Sentence Transformers 1 SciPy 1 Beautiful Soup 1 Jinja2 1 Node.js Path 1 lxml 1 Node.js File System 1 FastAPI 1 Hugging Face Tokenizers 1 Streamlit 1 Aiohttp 1 spaCy 1 Standard Library 258313 modules

03Notable Files

where complexity and size live

Most Complex

FileLinesCx
libs/partners/openai/langchain_openai/chat_models/base.py4,756547
libs/core/tests/unit_tests/runnables/test_runnable.py4,841385
libs/langchain_v1/langchain/agents/factory.py1,452255
libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py1,555228
libs/core/langchain_core/language_models/llms.py1,137221
libs/core/langchain_core/messages/block_translators/openai.py930210
libs/standard-tests/langchain_tests/integration_tests/chat_models.py3,063193
libs/core/langchain_core/callbacks/manager.py1,949172
libs/core/langchain_core/messages/utils.py2,147152
libs/partners/ollama/langchain_ollama/chat_models.py1,642148

Largest

FileLinesCx
libs/partners/openrouter/langchain_openrouter/data/_profiles.py7,4940
libs/core/langchain_core/runnables/base.py6,38932
libs/core/tests/unit_tests/runnables/test_runnable.py4,841385
libs/partners/openai/langchain_openai/chat_models/base.py4,756547
libs/partners/openai/tests/unit_tests/chat_models/test_base.py4,41881
libs/text-splitters/tests/unit_tests/test_text_splitters.py3,73857
libs/partners/anthropic/tests/unit_tests/test_chat_models.py3,73460
libs/core/tests/unit_tests/test_tools.py3,62844
libs/partners/openrouter/tests/unit_tests/test_chat_models.py3,42459
libs/standard-tests/langchain_tests/integration_tests/chat_models.py3,063193

04Code Quality

style, correctness, and maintainability findings

By Severity & Category

Warning
0
Info
36
Error
0
Total
3,932
By Category
correctness 17 maintainability 19

Top Findings

Ensure functions have docstrings for documentation ×2
.github/scripts/check_diff.py:56 + 1 more
Avoid unnecessary list conversions; use generators where possible ×3
.github/scripts/check_diff.py:127 + 2 more

05Secrets & Credentials

pattern-based scan for hardcoded secrets
✓   No hardcoded credentials or secret patterns detected. Pattern-based scan only — does not catch logic-level vulnerabilities.

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