diff --git a/poetry.lock b/poetry.lock
index 13526fc..b6eb5b1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2553,25 +2553,62 @@ files = [
 
 [[package]]
 name = "langchain"
-version = "0.3.30"
+version = "1.3.0"
 description = "Building applications with LLMs through composability"
 optional = false
-python-versions = "<4.0.0,>=3.9.0"
+python-versions = "<4.0.0,>=3.10.0"
 groups = ["main"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "langchain-0.3.30-py3-none-any.whl", hash = "sha256:37e6fcce92faf70cc7bac23739d13d6c3b9a3282da4dbcc06cb7e78330ed406a"},
-    {file = "langchain-0.3.30.tar.gz", hash = "sha256:06599ec90fb550e0118b0ceab737667d2c0891fcc62ffce2058d21c945844448"},
+    {file = "langchain-1.3.0-py3-none-any.whl", hash = "sha256:9ce48828c706c00c586304b519fbd910e75d9f5ab3f319c31834e42107437f43"},
+    {file = "langchain-1.3.0.tar.gz", hash = "sha256:8ec70ee0cef94255f3e522423b254093a3dd34509638d353c50f3d9dd498debc"},
 ]
 
 [package.dependencies]
-langchain-core = ">=0.3.85,<1.0.0"
-langchain-text-splitters = ">=0.3.9,<1.0.0"
+langchain-core = ">=1.4.0,<2.0.0"
+langgraph = ">=1.2.0,<1.3.0"
+pydantic = ">=2.7.4,<3.0.0"
+
+[package.extras]
+anthropic = ["langchain-anthropic"]
+aws = ["langchain-aws"]
+azure-ai = ["langchain-azure-ai"]
+baseten = ["langchain-baseten (>=0.2.0)"]
+community = ["langchain-community"]
+deepseek = ["langchain-deepseek"]
+fireworks = ["langchain-fireworks"]
+google-genai = ["langchain-google-genai"]
+google-vertexai = ["langchain-google-vertexai"]
+groq = ["langchain-groq"]
+huggingface = ["langchain-huggingface"]
+mistralai = ["langchain-mistralai"]
+ollama = ["langchain-ollama"]
+openai = ["langchain-openai"]
+perplexity = ["langchain-perplexity"]
+together = ["langchain-together"]
+xai = ["langchain-xai"]
+
+[[package]]
+name = "langchain-classic"
+version = "1.0.7"
+description = "Building applications with LLMs through composability"
+optional = false
+python-versions = "<4.0.0,>=3.10.0"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langchain_classic-1.0.7-py3-none-any.whl", hash = "sha256:d9d9be38f7aa534ed0259c2410432e34a1f80b1d491e686749bb55af56479be3"},
+    {file = "langchain_classic-1.0.7.tar.gz", hash = "sha256:debbec8065e69b95108d2652e8d5c44f4516e19aa8d716c02ed2211c3aee099d"},
+]
+
+[package.dependencies]
+langchain-core = ">=1.3.3,<2.0.0"
+langchain-text-splitters = ">=1.1.2,<2.0.0"
 langsmith = ">=0.1.17,<1.0.0"
 pydantic = ">=2.7.4,<3.0.0"
-PyYAML = ">=5.3.0,<7.0.0"
+pyyaml = ">=5.3.0,<7.0.0"
 requests = ">=2.0.0,<3.0.0"
-SQLAlchemy = ">=1.4.0,<3.0.0"
+sqlalchemy = ">=1.4.0,<3.0.0"
 
 [package.extras]
 anthropic = ["langchain-anthropic"]
@@ -2594,23 +2631,23 @@ xai = ["langchain-xai"]
 
 [[package]]
 name = "langchain-community"
-version = "0.3.31"
+version = "0.4.1"
 description = "Community contributed LangChain integrations."
 optional = false
-python-versions = "<4.0.0,>=3.9.0"
+python-versions = "<4.0.0,>=3.10.0"
 groups = ["main"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "langchain_community-0.3.31-py3-none-any.whl", hash = "sha256:1c727e3ebbacd4d891b07bd440647668001cea3e39cbe732499ad655ec5cb569"},
-    {file = "langchain_community-0.3.31.tar.gz", hash = "sha256:250e4c1041539130f6d6ac6f9386cb018354eafccd917b01a4cff1950b80fd81"},
+    {file = "langchain_community-0.4.1-py3-none-any.whl", hash = "sha256:2135abb2c7748a35c84613108f7ebf30f8505b18c3c18305ffaecfc7651f6c6a"},
+    {file = "langchain_community-0.4.1.tar.gz", hash = "sha256:f3b211832728ee89f169ddce8579b80a085222ddb4f4ed445a46e977d17b1e85"},
 ]
 
 [package.dependencies]
 aiohttp = ">=3.8.3,<4.0.0"
 dataclasses-json = ">=0.6.7,<0.7.0"
 httpx-sse = ">=0.4.0,<1.0.0"
-langchain = ">=0.3.27,<2.0.0"
-langchain-core = ">=0.3.78,<2.0.0"
+langchain-classic = ">=1.0.0,<2.0.0"
+langchain-core = ">=1.0.1,<2.0.0"
 langsmith = ">=0.1.125,<1.0.0"
 numpy = {version = ">=1.26.2", markers = "python_version < \"3.13\""}
 pydantic-settings = ">=2.10.1,<3.0.0"
@@ -2621,60 +2658,77 @@ tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<10.0.0"
 
 [[package]]
 name = "langchain-core"
-version = "0.3.86"
+version = "1.4.0"
 description = "Building applications with LLMs through composability"
 optional = false
-python-versions = "<4.0.0,>=3.9.0"
+python-versions = "<4.0.0,>=3.10.0"
 groups = ["main"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "langchain_core-0.3.86-py3-none-any.whl", hash = "sha256:7d2a1c50d2d2a139dbc6465cd339f32d14aa43db5ac9bd232e5b567a238709e8"},
-    {file = "langchain_core-0.3.86.tar.gz", hash = "sha256:671cbc96a325fe47f7dbab421236ada2d437bc4bfad0038102264885d0b462e2"},
+    {file = "langchain_core-1.4.0-py3-none-any.whl", hash = "sha256:23cbbdb46e38ddd1dd5247e6167e96013eae74bea4c5949c550809970a9e565c"},
+    {file = "langchain_core-1.4.0.tar.gz", hash = "sha256:1dc341eed802ed9c117c0df3923c991e5e9e226571e5725c194eeb5bd93d1a7f"},
 ]
 
 [package.dependencies]
 jsonpatch = ">=1.33.0,<2.0.0"
+langchain-protocol = ">=0.0.14"
 langsmith = ">=0.3.45,<1.0.0"
-packaging = ">=23.2.0,<26.0.0"
+packaging = ">=23.2.0"
 pydantic = ">=2.7.4,<3.0.0"
-PyYAML = ">=5.3.0,<7.0.0"
+pyyaml = ">=5.3.0,<7.0.0"
 tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<10.0.0"
 typing-extensions = ">=4.7.0,<5.0.0"
 uuid-utils = ">=0.12.0,<1.0"
 
 [[package]]
 name = "langchain-openai"
-version = "0.3.35"
+version = "1.2.1"
 description = "An integration package connecting OpenAI and LangChain"
 optional = false
-python-versions = "<4.0.0,>=3.9.0"
+python-versions = "<4.0.0,>=3.10.0"
 groups = ["main"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "langchain_openai-0.3.35-py3-none-any.whl", hash = "sha256:76d5707e6e81fd461d33964ad618bd326cb661a1975cef7c1cb0703576bdada5"},
-    {file = "langchain_openai-0.3.35.tar.gz", hash = "sha256:fa985fd041c3809da256a040c98e8a43e91c6d165b96dcfeb770d8bd457bf76f"},
+    {file = "langchain_openai-1.2.1-py3-none-any.whl", hash = "sha256:a80732185030d4f453dda6c25feef46f645f665423fdffe38ae3edf1ac3c6c4d"},
+    {file = "langchain_openai-1.2.1.tar.gz", hash = "sha256:ee4480b787706361b7125fad46930589a624df87aa158c6986ef1fad10d10675"},
 ]
 
 [package.dependencies]
-langchain-core = ">=0.3.78,<1.0.0"
-openai = ">=1.104.2,<3.0.0"
+langchain-core = ">=1.3.2,<2.0.0"
+openai = ">=2.26.0,<3.0.0"
 tiktoken = ">=0.7.0,<1.0.0"
 
+[[package]]
+name = "langchain-protocol"
+version = "0.0.15"
+description = "Python bindings for the LangChain agent streaming protocol"
+optional = false
+python-versions = "<4.0.0,>=3.10.0"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langchain_protocol-0.0.15-py3-none-any.whl", hash = "sha256:461eb794358f83d5e42635a5797799ffec7b4702314e34edf73ac21e75d3ef79"},
+    {file = "langchain_protocol-0.0.15.tar.gz", hash = "sha256:9ab2d11ee73944754f10e037e717098d3a6796f0e58afa9cadda6154e7655ade"},
+]
+
+[package.dependencies]
+typing-extensions = ">=4.7.0,<5.0.0"
+
 [[package]]
 name = "langchain-text-splitters"
-version = "0.3.11"
+version = "1.1.2"
 description = "LangChain text splitting utilities"
 optional = false
-python-versions = ">=3.9"
+python-versions = "<4.0.0,>=3.10.0"
 groups = ["main"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "langchain_text_splitters-0.3.11-py3-none-any.whl", hash = "sha256:cf079131166a487f1372c8ab5d0bfaa6c0a4291733d9c43a34a16ac9bcd6a393"},
-    {file = "langchain_text_splitters-0.3.11.tar.gz", hash = "sha256:7a50a04ada9a133bbabb80731df7f6ddac51bc9f1b9cab7fa09304d71d38a6cc"},
+    {file = "langchain_text_splitters-1.1.2-py3-none-any.whl", hash = "sha256:a2de0d799ff31886429fd6e2e0032df275b60ec817c19059a7b46181cc1c2f10"},
+    {file = "langchain_text_splitters-1.1.2.tar.gz", hash = "sha256:782a723db0a4746ac91e251c7c1d57fd23636e4f38ed733074e28d7a86f41627"},
 ]
 
 [package.dependencies]
-langchain-core = ">=0.3.75,<2.0.0"
+langchain-core = ">=1.2.31,<2.0.0"
 
 [[package]]
 name = "langfair"
@@ -2691,7 +2745,7 @@ develop = false
 asyncio = "^3.4.3"
 detoxify = "^0.5.2"
 evaluate = "^0.4.1"
-langchain = "^0.3.7"
+langchain = ">=0.3.7,<2.0"
 nltk = ">=3.8.2"
 numpy = "^1.26.4"
 rouge-score = "^0.1.2"
@@ -2705,7 +2759,79 @@ vadersentiment = "^3.3.2"
 type = "git"
 url = "https://github.com/mantric/langfair-mantric.git"
 reference = "python-3.12-support"
-resolved_reference = "cc0cbc4649334e690102912133878d074192a5eb"
+resolved_reference = "33754a734c87c87379a1d41381ed83f6b39da661"
+
+[[package]]
+name = "langgraph"
+version = "1.2.0"
+description = "Building stateful, multi-actor applications with LLMs"
+optional = false
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langgraph-1.2.0-py3-none-any.whl", hash = "sha256:03fd5895a8d4b70db1ff63ebc3bacead29dd20cd794a8b1a483e7ec9018f7a65"},
+    {file = "langgraph-1.2.0.tar.gz", hash = "sha256:4a9baaf62afc5d5f63144a50095140a34b9aa9b7cea695d25326d564775348e7"},
+]
+
+[package.dependencies]
+langchain-core = ">=1.4.0,<2"
+langgraph-checkpoint = ">=4.1.0,<5.0.0"
+langgraph-prebuilt = ">=1.1.0,<1.2.0"
+langgraph-sdk = ">=0.3.0,<0.4.0"
+pydantic = ">=2.7.4"
+xxhash = ">=3.5.0"
+
+[[package]]
+name = "langgraph-checkpoint"
+version = "4.1.0"
+description = "Library with base interfaces for LangGraph checkpoint savers."
+optional = false
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langgraph_checkpoint-4.1.0-py3-none-any.whl", hash = "sha256:8bc2a0466a20c38b865ce6671b42093fd5c041133f32351cae4222e0eeaf7fb5"},
+    {file = "langgraph_checkpoint-4.1.0.tar.gz", hash = "sha256:e5bb304e30fc1363ac8fcb5f7dee5ca2185d77fe475b0d01de2c5f91324c2c21"},
+]
+
+[package.dependencies]
+langchain-core = ">=0.2.38"
+ormsgpack = ">=1.12.0"
+
+[[package]]
+name = "langgraph-prebuilt"
+version = "1.1.0"
+description = "Library with high-level APIs for creating and executing LangGraph agents and tools."
+optional = false
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langgraph_prebuilt-1.1.0-py3-none-any.whl", hash = "sha256:51e311747d755b751d5c6b39b0c1446124d3a7643d2515017e6714b323508fc9"},
+    {file = "langgraph_prebuilt-1.1.0.tar.gz", hash = "sha256:3c579cf6eed2d17f9c157c2d0fcaddcd8688524e7022d3b22b37a3bf4589d528"},
+]
+
+[package.dependencies]
+langchain-core = ">=1.3.1"
+langgraph-checkpoint = ">=2.1.0,<5.0.0"
+
+[[package]]
+name = "langgraph-sdk"
+version = "0.3.14"
+description = "SDK for interacting with LangGraph API"
+optional = false
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
+    {file = "langgraph_sdk-0.3.14-py3-none-any.whl", hash = "sha256:68935bf6f4924eda92617a9e5dfb4f4281197508c648cb9d62ff083907607f9d"},
+    {file = "langgraph_sdk-0.3.14.tar.gz", hash = "sha256:acd1674c538e97f3cdaa610f6dd7e34bc9bad30167f0ccc482dcd563325e81f5"},
+]
+
+[package.dependencies]
+httpx = ">=0.25.2"
+orjson = ">=3.11.5"
 
 [[package]]
 name = "langsmith"
@@ -3834,17 +3960,77 @@ files = [
     {file = "orjson-3.11.9.tar.gz", hash = "sha256:4fef17e1f8722c11587a6ef18e35902450221da0028e65dbaaa543619e68e48f"},
 ]
 
+[[package]]
+name = "ormsgpack"
+version = "1.12.2"
+description = "Fast, correct Python msgpack library supporting dataclasses, datetimes, and numpy"
+optional = false
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
+files = [
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+
 [[package]]
 name = "packaging"
-version = "25.0"
+version = "26.2"
 description = "Core utilities for Python packages"
 optional = false
 python-versions = ">=3.8"
 groups = ["main", "dev"]
 markers = "sys_platform == \"win32\" or sys_platform == \"emscripten\" or sys_platform != \"win32\" and sys_platform != \"emscripten\""
 files = [
-    {file = "packaging-25.0-py3-none-any.whl", hash = "sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484"},
-    {file = "packaging-25.0.tar.gz", hash = "sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f"},
+    {file = "packaging-26.2-py3-none-any.whl", hash = "sha256:5fc45236b9446107ff2415ce77c807cee2862cb6fac22b8a73826d0693b0980e"},
+    {file = "packaging-26.2.tar.gz", hash = "sha256:ff452ff5a3e828ce110190feff1178bb1f2ea2281fa2075aadb987c2fb221661"},
 ]
 
 [[package]]
@@ -7387,4 +7573,4 @@ cffi = ["cffi (>=1.17,<2.0)", "cffi (>=2.0.0b)"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.12,<3.13"
-content-hash = "989f8bdc56a823a2f3f58b2544e16fa603ad786cf696ea5b572e67795b197c7a"
+content-hash = "fc682dd894f2585470a57a323f08815f43440c1e81efc8f5166ca2f144e5e172"
diff --git a/pyproject.toml b/pyproject.toml
index 59107f0..26518f0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ dependencies = [
     "requests>=2.33.0,<3.0.0",
     "python-dotenv>=1.2.2",
     "pandas>=2.2.0",
-    "langchain-openai>=0.3.0,<0.4",
+    "langchain-openai>=1.1.14",
     "pydantic-ai (>=0.0.24,<0.0.25)",
     "markdown (>=3.8.1,<4.0)",
     "reportlab (>=4.3.1,<5.0.0)",
@@ -79,20 +79,19 @@ dependencies = [
     "pillow>=12.2.0",              # 4 advisories (PSD OOB write, FITS GZIP bomb, font overflow)
     "pypdf>=6.10.2",               # 14 advisories (multiple RAM-exhaust, infinite-loop fixes)
     "nltk>=3.9.4",                 # 1 critical zip slip + 4 high (downloader path traversal, AFO, XSS)
-    # LangChain ecosystem stays on 0.3.x because langfair-mantric pins langchain ^0.3.7.
-    # The 1.x advisories (langchain-core <1.2.22, langchain-text-splitters <1.1.2,
-    # langchain-openai <1.1.14) are upstream-blocked until langfair is updated to
-    # allow LangChain 1.x. Tracked separately.
-    "langchain-core>=0.3.85,<0.4",  # 1 critical serialization + 1 high (overly-broad load allowlists)
-    "langchain>=0.3.30,<0.4",       # 1 high (unsafe deserialization); match langchain-core line
-    "langchain-text-splitters>=0.3.9,<0.4",  # XXE fix on the 0.3.x line
-    "langchain-community>=0.3.27,<0.4", # 1 high XXE
-    "langsmith>=0.7.31",            # 1 high deserialization + token-redaction bypass
+    # LangChain ecosystem on 1.x — unlocked by langfair-mantric@python-3.12-support
+    # which now allows langchain >=0.3.7,<2.0 (only imports langchain_core, which is
+    # API-compatible across the 0.3 -> 1.x transition).
+    "langchain-core>=1.2.22",       # 1 high path traversal (load_prompt) + 1 low SSRF
+    "langchain>=1.0.0",             # match langchain-core 1.x line
+    "langchain-text-splitters>=1.1.2",  # 1 high XXE + 1 medium SSRF in HTMLHeaderTextSplitter
+    "langchain-community>=0.3.27",  # 1 high XXE (community remained on 0.3.x — not yet ported to 1.x)
+    "langsmith>=0.8.0",             # 1 high deserialization + token-redaction bypass
     "pyasn1>=0.6.3",                # 2 high DoS (unbounded recursion)
     "protobuf>=5.29.6,<6",          # 1 high JSON recursion depth bypass; pin to 5.x to avoid major bump
     "banks>=2.4.2",                # 1 critical RCE via Jinja2 SSTI
     "starlette>=0.49.1",            # 1 high O(n^2) range-header DoS + 1 medium multipart DoS
-    "langchain-openai>=0.3.0,<0.4",     # 1 low SSRF (image token counting DNS rebinding bypass)
+    "langchain-openai>=1.1.14",     # 1 low SSRF (image token counting DNS rebinding bypass)
     "sentencepiece>=0.2.1",        # 1 high heap overflow
     "orjson>=3.11.6",              # 1 high unbounded recursion
     "brotli>=1.2.0",               # 1 high DoS