docs: add a how-to for streaming from final node (#832)

.github/workflows/link_check.yml

@@ -64,13 +64,7 @@ jobs:
             echo "Changed files: ${CHANGED_FILES}"
             if [ -n "${CHANGED_FILES}" ]; then
               echo "Running link check on changed notebook files..."
-              poetry run pytest -v --check-links-ignore "https://(api|web)\.smith\.langchain\.com/.*" --check-links-ignore "https://x.com/.*" --check-links ${CHANGED_FILES}
-              PYTEST_EXIT_CODE=$?
-              echo "pytest exit code: ${PYTEST_EXIT_CODE}"
-              if [ "${PYTEST_EXIT_CODE}" -ne 0 ] && [ "${PYTEST_EXIT_CODE}" -ne 5 ]; then
-                echo "pytest failed with exit code ${PYTEST_EXIT_CODE}"
-                exit ${PYTEST_EXIT_CODE}
-              fi
+              poetry run pytest -v --check-links-ignore "https://(api|web)\.smith\.langchain\.com/.*" --check-links-ignore "https://x.com/.*" --check-links ${CHANGED_FILES} || ([ $? = 5 ] && exit 0 || exit $?)
             else
               echo "No notebook files changed."
             fi

docs/_scripts/copy_notebooks.py

@@ -22,6 +22,7 @@ _MANUAL = {
         "streaming-tokens.ipynb",
         "streaming-content.ipynb",
         "streaming-events-from-within-tools.ipynb",
+        "streaming-from-final-node.ipynb",
         "persistence.ipynb",
         "persistence_postgres.ipynb",
         "visualization.ipynb",

docs/docs/how-tos/index.md

@@ -45,6 +45,7 @@ These guides show how to use different streaming modes.
 - [How to stream arbitrarily nested content](streaming-content.ipynb)
 - [How to configure multiple streaming modes at the same time](stream-multiple.ipynb)
 - [How to stream events from within a tool](streaming-events-from-within-tools.ipynb)
+- [How to stream events from the final node](streaming-from-final-node.ipynb)
 
 ## Other
 - [How to run graph asynchronously](async.ipynb)

docs/mkdocs.yml

@@ -145,6 +145,7 @@ nav:
           - Stream arbitrarily nested content: how-tos/streaming-content.ipynb
           - Configure multiple streaming modes: how-tos/stream-multiple.ipynb
           - Stream events from within tools: how-tos/streaming-events-from-within-tools.ipynb
+          - Stream events from the final node: how-tos/streaming-from-final-node.ipynb
       - Other:
           - Run graph asynchronously: how-tos/async.ipynb
           - Visualize your graph: how-tos/visualization.ipynb

examples/stream-multiple.ipynb

@@ -77,7 +77,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# this is all that's needed for the agent.py\n",
     "from typing import Literal\n",
     "from langchain_community.tools.tavily_search import TavilySearchResults\n",
     "from langchain_core.runnables import ConfigurableField\n",

examples/stream-updates.ipynb

@@ -82,7 +82,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# this is all that's needed for the agent.py\n",
     "from typing import Literal\n",
     "from langchain_community.tools.tavily_search import TavilySearchResults\n",
     "from langchain_core.runnables import ConfigurableField\n",

examples/stream-values.ipynb

@@ -82,7 +82,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# this is all that's needed for the agent.py\n",
     "from typing import Literal\n",
     "from langchain_community.tools.tavily_search import TavilySearchResults\n",
     "from langchain_core.runnables import ConfigurableField\n",