Pass input value to `handleChainStart` in `_transformStreamWithConfig` #1644

	# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs

	name: Platform Compatibility

	on:
	pull_request:
	# Only run this workflow if the following directories have changed.
	paths:
	- 'langchain/**'
	- 'langchain-core/**'
	- 'libs/**'
	workflow_dispatch: # Allows triggering the workflow manually in GitHub UI


	# If another push to the same PR or branch happens while this workflow is still running,
	# cancel the earlier run in favor of the next run.
	#
	# There's no point in testing an outdated version of the code. GitHub only allows
	# a limited number of job runners to be active at the same time, so it's better to cancel
	# pointless jobs early so that more useful jobs can run sooner.
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	platform-compatibility:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	steps:
	- uses: actions/checkout@v4
	- name: Use Node.js ${{ env.NODE_VERSION }}
	uses: actions/setup-node@v3
	with:
	node-version: ${{ env.NODE_VERSION }}
	cache: "yarn"
	- name: Install dependencies
	run: cd ./langchain-core && yarn workspaces focus
	- name: Build @langchain/scripts
	run: cd ./libs/langchain-scripts && yarn build:internal
	- name: Build `@langchain/core`
	run: cd ./langchain-core && yarn build:internal

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