[codex] add neural watermark scaffold #12

	name: test all

	on: [push, pull_request]

	permissions:
	contents: read

	jobs:
	build:
	runs-on: ubuntu-latest
	name: Test robust watermark engine
	defaults:
	run:
	working-directory: blind_watermark
	steps:
	- uses: actions/checkout@v6
	- uses: actions/setup-python@v6
	with:
	python-version: '3.10'
	- name: Install dependencies
	run: \|
	pip install -r requirements.txt
	- name: Smoke test - import and roundtrip
	shell: python {0}
	env:
	PYTHONPATH: .
	run: \|
	from rwm_engine import embed_watermark, extract_watermark, check_dependencies
	import numpy as np

	dep = check_dependencies()
	assert dep['ok'], f'Missing deps: {dep}'

	img = np.random.randint(0, 256, (800, 800, 3), dtype=np.uint8)

	embedded = embed_watermark(
	img,
	'hello world',
	password=42,
	quality='balanced',
	)
	assert embedded['ok'], f'Embed failed: {embedded}'
	assert embedded['image'] is not None, f'Embed image missing: {embedded}'
	assert embedded['engine_used'] in {'legacy', 'neural'}, embedded

	extracted = extract_watermark(
	embedded['image'],
	password=42,
	quality='balanced',
	)
	assert extracted['ok'], f'Extract failed: {extracted}'
	assert extracted['wm'] == 'hello world', f'Roundtrip failed: {extracted}'

	print('All tests passed.')

Provide feedback