| 1 | using System.Collections.Frozen; |
| 2 | using System.Net.Http.Json; |
| 3 | using System.Text.Json; |
| 4 | using AgentForge.Abstractions; |
| 5 | using AgentForge.Credentials; |
| 6 | using AgentForge.Mcp; |
| 7 | using ModelContextProtocol.Protocol; |
| 8 | using ModelContextProtocol.Server; |
| 9 | using Tool = ModelContextProtocol.Protocol.Tool; |
| 10 | |
| 11 | var load = ForgeMcpConfigLoader.Load(args); |
| 12 | if (load.IsHelp) |
| 13 | { |
| 14 | PrintUsage(); |
| 15 | return 0; |
| 16 | } |
| 17 | |
| 18 | if (!load.IsSuccess || load.Settings is null) |
| 19 | { |
| 20 | Console.Error.WriteLine(load.Error ?? "Failed to load MCP config."); |
| 21 | PrintUsage(); |
| 22 | return 1; |
| 23 | } |
| 24 | |
| 25 | var settings = load.Settings; |
| 26 | |
| 27 | var jsonOptions = new JsonSerializerOptions |
| 28 | { |
| 29 | PropertyNameCaseInsensitive = true, |
| 30 | PropertyNamingPolicy = JsonNamingPolicy.CamelCase, |
| 31 | }; |
| 32 | |
| 33 | using var http = CreateHttpClient(settings); |
| 34 | using var runCts = new CancellationTokenSource(); |
| 35 | |
| 36 | var options = new McpServerOptions |
| 37 | { |
| 38 | ServerInfo = new Implementation { Name = "AgentForgeMcp", Version = "0.4.0" }, |
| 39 | ServerInstructions = ServerInstructions.Text, |
| 40 | ProtocolVersion = "2024-11-05", |
| 41 | Capabilities = new ServerCapabilities |
| 42 | { |
| 43 | Tools = new ToolsCapability { ListChanged = settings.ToolsListChanged }, |
| 44 | }, |
| 45 | Handlers = new McpServerHandlers |
| 46 | { |
| 47 | ListToolsHandler = async (_, cancellationToken) => |
| 48 | { |
| 49 | var tools = await ForgeMcpToolLoader.LoadFromCapabilitiesAsync(http, jsonOptions, cancellationToken) |
| 50 | .ConfigureAwait(false); |
| 51 | ForgeMcpCursorToolDescriptorSync.TrySync(tools, settings); |
| 52 | return new ListToolsResult { Tools = tools }; |
| 53 | }, |
| 54 | CallToolHandler = async (request, cancellationToken) => |
| 55 | { |
| 56 | var name = request.Params?.Name ?? ""; |
| 57 | var args = request.Params?.Arguments is IReadOnlyDictionary<string, JsonElement> dictionary |
| 58 | ? dictionary |
| 59 | : FrozenDictionary<string, JsonElement>.Empty; |
| 60 | |
| 61 | try |
| 62 | { |
| 63 | var payload = new ForgeMcpInvokeRequest |
| 64 | { |
| 65 | Tool = name, |
| 66 | Arguments = args.Count == 0 ? null : args.ToDictionary(static p => p.Key, static p => p.Value), |
| 67 | }; |
| 68 | |
| 69 | using var response = await http.PostAsJsonAsync("/api/v1/mcp/invoke", payload, jsonOptions, cancellationToken) |
| 70 | .ConfigureAwait(false); |
| 71 | var body = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false); |
| 72 | var invoke = JsonSerializer.Deserialize<ForgeMcpInvokeResponse>(body, jsonOptions) |
| 73 | ?? new ForgeMcpInvokeResponse { Success = false, Body = body }; |
| 74 | |
| 75 | return new CallToolResult |
| 76 | { |
| 77 | Content = [new TextContentBlock { Text = invoke.Body }], |
| 78 | IsError = !invoke.Success, |
| 79 | }; |
| 80 | } |
| 81 | catch (HttpRequestException ex) |
| 82 | { |
| 83 | return Error($"Forge unreachable at {settings.BaseUri}: {ex.Message}"); |
| 84 | } |
| 85 | catch (Exception ex) |
| 86 | { |
| 87 | return Error(ex.Message); |
| 88 | } |
| 89 | }, |
| 90 | }, |
| 91 | }; |
| 92 | |
| 93 | static CallToolResult Error(string message) => |
| 94 | new() |
| 95 | { |
| 96 | Content = [new TextContentBlock { Text = $"Error: {message}" }], |
| 97 | IsError = true, |
| 98 | }; |
| 99 | |
| 100 | static HttpClient CreateHttpClient(ForgeMcpSettings settings) |
| 101 | { |
| 102 | var http = new HttpClient { BaseAddress = settings.BaseUri }; |
| 103 | http.DefaultRequestHeaders.Accept.ParseAdd("application/json"); |
| 104 | |
| 105 | var apiToken = settings.ApiToken |
| 106 | ?? new ForgeCredentialStore().TryGetToken(ForgeHostUrl.NormalizeKey(settings.BaseUri)); |
| 107 | if (string.IsNullOrEmpty(apiToken)) |
| 108 | Console.Error.WriteLine( |
| 109 | $"Forge MCP: no API token for {ForgeHostUrl.NormalizeKey(settings.BaseUri)}. " + |
| 110 | "Set [identity].api_token in forge-mcp.toml, FORGE_API_TOKEN env, or run forge auth login."); |
| 111 | if (!string.IsNullOrEmpty(apiToken)) |
| 112 | http.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", apiToken); |
| 113 | |
| 114 | if (!string.IsNullOrEmpty(settings.Actor)) |
| 115 | http.DefaultRequestHeaders.TryAddWithoutValidation("X-Forge-Actor", settings.Actor); |
| 116 | |
| 117 | return http; |
| 118 | } |
| 119 | |
| 120 | static void PrintUsage() |
| 121 | { |
| 122 | Console.Error.WriteLine( |
| 123 | """ |
| 124 | AgentForge.Mcp — stdio bridge to Agent Forge API. |
| 125 | |
| 126 | Usage: |
| 127 | AgentForge.Mcp [--config|-c PATH] |
| 128 | |
| 129 | Config (TOML, recommended): |
| 130 | version = 1 |
| 131 | [forge] |
| 132 | base_url = "http://127.0.0.1:8770" |
| 133 | [identity] |
| 134 | actor = "oar:YourName" |
| 135 | [mcp] |
| 136 | tools_list_changed = true |
| 137 | capabilities_poll_seconds = 120 |
| 138 | [cursor] |
| 139 | sync_tool_descriptors = true |
| 140 | tool_descriptors_dir = "C:/Users/you/.cursor/projects/<slug>/mcps/user-forge/tools" |
| 141 | |
| 142 | Env overrides (optional): |
| 143 | FORGE_BASE_URL, FORGE_API_TOKEN, FORGE_ACTOR |
| 144 | FORGE_MCP_TOOLS_LIST_CHANGED, FORGE_MCP_CAPABILITIES_POLL_SECONDS |
| 145 | FORGE_CURSOR_SYNC_TOOLS, FORGE_CURSOR_TOOLS_DIR |
| 146 | Token fallback: ~/.forge/credentials.json (forge login) |
| 147 | """); |
| 148 | } |
| 149 | |
| 150 | var transport = new StdioServerTransport("AgentForgeMcp"); |
| 151 | await using var server = McpServer.Create(transport, options); |
| 152 | ForgeMcpCapabilitiesPoller.StartIfEnabled(server, http, settings, jsonOptions, runCts.Token); |
| 153 | await server.RunAsync(runCts.Token); |
| 154 | return 0; |
| 155 | |