Luna/Luna.Configuration/Extensions/ConfigurationBuilderExtensions.cs

using Luna.Configuration.Services.Agents;
using Luna.Configuration.Services.Providers;
using Microsoft.Extensions.Configuration;

namespace Luna.Configuration.Extensions;

public static class ConfigurationBuilderExtensions
{
    private static readonly string[] AgentConfigSearchPaths =
    [
        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".luna", "agents")
    ];

    private static readonly string[] ProviderConfigSearchPaths =
    [
        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".luna", "providers")
    ];

    extension(IConfigurationBuilder builder)
    {
        public IConfigurationBuilder AddLunaConfiguration()
        {
            builder.Add(new AgentOptionsConfigurationSource());

            foreach (var searchPath in AgentConfigSearchPaths)
            {
                builder.Add(new AgentOptionsConfigurationSource(searchPath));
            }

            builder.Add(new ProviderOptionsConfigurationSource());

            foreach (var searchPath in ProviderConfigSearchPaths)
            {
                builder.Add(new ProviderOptionsConfigurationSource(searchPath));
            }

            // Re-applied last so environment variables take precedence over the TOML
            // sources above. This is how secrets (API keys, bot tokens) are supplied —
            // the embedded defaults ship with empty credentials.
            builder.AddEnvironmentVariables();

            return builder;
        }
    }
}