refactor: make `Agent.step()` multi-step #3229

	name: Code Formatter (Black)
	on:
	pull_request:
	paths:
	- '**.py'
	workflow_dispatch:
	jobs:
	black-check:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.head_ref }} # Checkout the PR branch
	fetch-depth: 0 # Fetch all history for all branches and tags
	- name: "Setup Python, Poetry and Dependencies"
	uses: packetcoders/action-setup-cache-python-poetry@main
	with:
	python-version: "3.12"
	poetry-version: "1.8.2"
	install-args: "-E dev" # TODO: change this to --group dev when PR #842 lands
	- name: Run Black
	id: black
	run: poetry run black --check .
	continue-on-error: true
	- name: Auto-fix with Black and commit
	if: steps.black.outcome == 'failure' && !contains(github.event.pull_request.labels.*.name, 'check-only')
	run: \|
	poetry run black .
	git config --local user.email "action@github.com"
	git config --local user.name "GitHub Action"
	git diff --quiet && git diff --staged --quiet \|\| (git add -A && git commit -m "Apply Black formatting")
	git push
	- name: Error if 'check-only' label is present
	if: steps.black.outcome == 'failure' && contains(github.event.pull_request.labels.*.name, 'check-only')
	run: echo "Black formatting check failed. Please run 'black .' locally to fix formatting issues." && exit 1

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