Data visualizer capability #40

	name: Validate Capabilities

	on:
	pull_request:
	paths:
	- "capabilities/**/pixi.toml"
	- "spec/capability.schema.json"

	jobs:
	validate:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"

	- name: Install jsonschema
	run: pip install jsonschema==4.*

	- name: Validate capabilities
	run: \|
	python - <<'EOF'
	import sys
	import tomllib
	import json
	import pathlib
	import jsonschema

	schema_path = pathlib.Path("spec/capability.schema.json")
	schema = json.loads(schema_path.read_text())

	manifests = sorted(pathlib.Path("capabilities").glob("*/pixi.toml"))
	if not manifests:
	print("No capabilities found to validate.")
	sys.exit(0)

	errors = []
	for manifest in manifests:
	print(f"Validating {manifest} ...", end=" ")
	data = tomllib.loads(manifest.read_text())
	try:
	jsonschema.validate(instance=data, schema=schema)
	print("OK")
	except jsonschema.ValidationError as e:
	print("FAILED")
	errors.append(f"{manifest}: {e.message} (path: {' -> '.join(str(p) for p in e.absolute_path)})")

	if errors:
	print("\nValidation errors:")
	for err in errors:
	print(f" - {err}")
	sys.exit(1)

	print(f"\nAll {len(manifests)} capability manifest(s) are valid.")
	EOF

Provide feedback