feat: allow writing evals.json for config

[tbuckley]

No description provided.

[cursor]

Bug: JSON Errors Misreported as YAML

When parsing JSON configuration files, errors are incorrectly reported as "Invalid YAML". The getConfig method's error handling logic is designed for YAML-specific errors, causing JSON parsing failures to fall through to a generic message that hardcodes "Invalid YAML". Consequently, JSON errors also lack detailed line-specific information.

src/lib/storage/FileSystemEvalsStorage.ts#L100-L110

evals-pwa/src/lib/storage/FileSystemEvalsStorage.ts

Lines 100 to 110 in 111a5b1

	}
	} catch (err) {
	if (err instanceof yaml.YAMLParseError) {
	if (text && err.linePos) {
	const line = text.split('\n')[err.linePos[0].line - 1];
	const error = `Line ${err.linePos[0].line}: ${line}`;
	throw new UiError({ type: 'invalid-config', errors: [error] });
	}
	}
	throw new UiError({ type: 'invalid-config', errors: ['Invalid YAML'] });
	}

Fix in Cursor • Fix in Web

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