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fix: preserve legacy path bytes and repair tag, tree and ref edge cases #55

	name: Downstream compatibility

	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	test:
	runs-on: ubuntu-latest
	timeout-minutes: 30
	strategy:
	fail-fast: false
	matrix:
	project: [langchain, mlflow, bandit, swebench, datahub]
	backend: [gix, cli]
	steps:
	- uses: actions/checkout@v7
	with:
	persist-credentials: false
	- name: Ensure Git 2.52 or newer
	run: \|
	if ! dpkg --compare-versions "$(git version \| awk '{print $3}')" ge 2.52; then
	sudo add-apt-repository --yes ppa:git-core/ppa
	sudo apt-get update
	sudo apt-get install --yes git
	fi
	- name: Prepare Rust for GixPython fixture tooling
	run: \|
	rustup update stable
	rustup default stable
	echo "CARGO_TARGET_DIR=$RUNNER_TEMP/gix-target" >> "$GITHUB_ENV"
	- name: Cache GixPython builds
	uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	${{ runner.temp }}/gix-target
	key: downstream-gix-${{ runner.os }}-${{ hashFiles('gix-requirements.txt') }}
	- name: Install uv
	uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
	with:
	version: '0.12.13'
	enable-cache: false
	- name: Test latest release against this checkout
	run: uv run test/downstream/run.py "${{ matrix.project }}" --backend "${{ matrix.backend }}"