milady
This commit is contained in:
nirholas
661
mcp-server/src/server.ts
Normal file
661
mcp-server/src/server.ts
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@@ -0,0 +1,661 @@
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/**
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* Shared MCP server definition — transport-agnostic.
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*
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* Exposes tools and resources for exploring the Claude Code source code.
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* This module is imported by both the STDIO and HTTP entrypoints.
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*/
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import { Server } from "@modelcontextprotocol/sdk/server/index.js";
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import {
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CallToolRequestSchema,
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ListToolsRequestSchema,
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ListResourcesRequestSchema,
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ReadResourceRequestSchema,
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ListResourceTemplatesRequestSchema,
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} from "@modelcontextprotocol/sdk/types.js";
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import * as fs from "node:fs/promises";
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import * as path from "node:path";
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import { fileURLToPath } from "node:url";
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// ---------------------------------------------------------------------------
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// Configuration
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// ---------------------------------------------------------------------------
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const __filename = fileURLToPath(import.meta.url);
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const __dirname = path.dirname(__filename);
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export const SRC_ROOT = path.resolve(
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process.env.CLAUDE_CODE_SRC_ROOT ?? path.join(__dirname, "..", "..", "src")
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);
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// ---------------------------------------------------------------------------
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// Helpers
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// ---------------------------------------------------------------------------
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async function dirExists(p: string): Promise<boolean> {
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try {
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return (await fs.stat(p)).isDirectory();
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} catch {
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return false;
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}
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}
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async function fileExists(p: string): Promise<boolean> {
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try {
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return (await fs.stat(p)).isFile();
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} catch {
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return false;
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}
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}
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async function listDir(dir: string): Promise<string[]> {
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try {
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const entries = await fs.readdir(dir, { withFileTypes: true });
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return entries
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.map((e) => (e.isDirectory() ? e.name + "/" : e.name))
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.sort();
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} catch {
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return [];
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}
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}
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async function walkFiles(root: string, rel = ""): Promise<string[]> {
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const results: string[] = [];
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let entries;
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try {
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entries = await fs.readdir(path.join(root, rel), { withFileTypes: true });
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} catch {
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return results;
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}
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for (const e of entries) {
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const child = rel ? `${rel}/${e.name}` : e.name;
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if (e.isDirectory()) {
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results.push(...(await walkFiles(root, child)));
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} else {
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results.push(child);
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}
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}
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return results;
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}
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/** Safely resolve a user-supplied relative path under SRC_ROOT (blocks path traversal). */
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function safePath(relPath: string): string | null {
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const resolved = path.resolve(SRC_ROOT, relPath);
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if (!resolved.startsWith(SRC_ROOT)) return null;
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return resolved;
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}
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// ---------------------------------------------------------------------------
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// Metadata Types
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// ---------------------------------------------------------------------------
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interface ToolInfo {
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name: string;
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directory: string;
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files: string[];
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}
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interface CommandInfo {
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name: string;
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path: string;
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isDirectory: boolean;
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files?: string[];
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}
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async function getToolList(): Promise<ToolInfo[]> {
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const toolsDir = path.join(SRC_ROOT, "tools");
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const entries = await fs.readdir(toolsDir, { withFileTypes: true });
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const tools: ToolInfo[] = [];
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for (const e of entries) {
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if (!e.isDirectory() || e.name === "shared" || e.name === "testing")
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continue;
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const files = await listDir(path.join(toolsDir, e.name));
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tools.push({ name: e.name, directory: `tools/${e.name}`, files });
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}
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return tools.sort((a, b) => a.name.localeCompare(b.name));
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}
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async function getCommandList(): Promise<CommandInfo[]> {
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const cmdsDir = path.join(SRC_ROOT, "commands");
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const entries = await fs.readdir(cmdsDir, { withFileTypes: true });
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const commands: CommandInfo[] = [];
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for (const e of entries) {
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if (e.isDirectory()) {
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const files = await listDir(path.join(cmdsDir, e.name));
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commands.push({
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name: e.name,
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path: `commands/${e.name}`,
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isDirectory: true,
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files,
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});
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} else {
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commands.push({
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name: e.name.replace(/\.(ts|tsx)$/, ""),
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path: `commands/${e.name}`,
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isDirectory: false,
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});
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}
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}
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return commands.sort((a, b) => a.name.localeCompare(b.name));
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}
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// ---------------------------------------------------------------------------
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// Server Factory
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// ---------------------------------------------------------------------------
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export function createServer(): Server {
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const server = new Server(
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{ name: "claude-code-explorer", version: "1.1.0" },
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{
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capabilities: {
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tools: {},
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resources: {},
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},
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}
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);
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// ---- Resources ---------------------------------------------------------
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server.setRequestHandler(ListResourcesRequestSchema, async () => ({
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resources: [
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{
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uri: "claude-code://architecture",
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name: "Architecture Overview",
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description:
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"High-level overview of the Claude Code source architecture",
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mimeType: "text/markdown",
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},
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{
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uri: "claude-code://tools",
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name: "Tool Registry",
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description: "List of all agent tools with their files",
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mimeType: "application/json",
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},
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{
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uri: "claude-code://commands",
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name: "Command Registry",
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description: "List of all slash commands",
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mimeType: "application/json",
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},
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],
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}));
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server.setRequestHandler(
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ListResourceTemplatesRequestSchema,
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async () => ({
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resourceTemplates: [
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{
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uriTemplate: "claude-code://source/{path}",
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name: "Source file",
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description:
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"Read a source file from the Claude Code src/ directory",
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mimeType: "text/plain",
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},
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],
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})
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);
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server.setRequestHandler(
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ReadResourceRequestSchema,
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async (request: { params: { uri: string } }) => {
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const { uri } = request.params;
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if (uri === "claude-code://architecture") {
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const readmePath = path.resolve(SRC_ROOT, "..", "README.md");
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let text: string;
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try {
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text = await fs.readFile(readmePath, "utf-8");
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} catch {
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text = "README.md not found.";
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}
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return { contents: [{ uri, mimeType: "text/markdown", text }] };
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}
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if (uri === "claude-code://tools") {
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const tools = await getToolList();
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return {
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contents: [
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{
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uri,
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mimeType: "application/json",
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text: JSON.stringify(tools, null, 2),
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},
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],
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};
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}
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if (uri === "claude-code://commands") {
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const commands = await getCommandList();
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return {
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contents: [
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{
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uri,
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mimeType: "application/json",
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text: JSON.stringify(commands, null, 2),
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},
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],
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};
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}
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if (uri.startsWith("claude-code://source/")) {
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const relPath = uri.slice("claude-code://source/".length);
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const abs = safePath(relPath);
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if (!abs) throw new Error("Invalid path");
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const text = await fs.readFile(abs, "utf-8");
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return { contents: [{ uri, mimeType: "text/plain", text }] };
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}
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throw new Error(`Unknown resource: ${uri}`);
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}
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);
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// ---- Tools -------------------------------------------------------------
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server.setRequestHandler(ListToolsRequestSchema, async () => ({
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tools: [
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{
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name: "list_tools",
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description:
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"List all Claude Code agent tools (BashTool, FileReadTool, etc.) with their source files.",
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inputSchema: { type: "object" as const, properties: {} },
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},
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{
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name: "list_commands",
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description:
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"List all Claude Code slash commands (/commit, /review, /mcp, etc.) with their source files.",
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inputSchema: { type: "object" as const, properties: {} },
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},
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{
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name: "get_tool_source",
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description:
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"Read the full source code of a specific Claude Code tool implementation.",
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inputSchema: {
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type: "object" as const,
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properties: {
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toolName: {
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type: "string",
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description: "Tool directory name, e.g. 'BashTool'",
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},
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fileName: {
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type: "string",
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description:
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"Specific file within the tool directory. Omit for the main file.",
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},
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},
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required: ["toolName"],
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},
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},
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{
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name: "get_command_source",
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description:
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"Read the source code of a specific Claude Code slash command.",
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inputSchema: {
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type: "object" as const,
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properties: {
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commandName: {
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type: "string",
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description: "Command name, e.g. 'commit', 'review'",
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},
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fileName: {
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type: "string",
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description: "Specific file within the command directory.",
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},
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},
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required: ["commandName"],
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},
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},
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{
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name: "read_source_file",
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description:
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"Read any source file from the Claude Code src/ directory by relative path.",
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inputSchema: {
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type: "object" as const,
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properties: {
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path: {
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type: "string",
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description: "Relative path from src/, e.g. 'QueryEngine.ts'",
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},
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startLine: {
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type: "number",
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description: "1-based start line.",
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},
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endLine: {
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type: "number",
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description: "1-based end line.",
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},
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},
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required: ["path"],
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},
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},
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{
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name: "search_source",
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description:
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"Search for a regex pattern across the Claude Code source. Returns matching lines with paths and line numbers.",
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inputSchema: {
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type: "object" as const,
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properties: {
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pattern: {
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type: "string",
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description: "Search pattern (regex).",
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},
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filePattern: {
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type: "string",
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description: "File extension filter, e.g. '.ts'",
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||||
},
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maxResults: {
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type: "number",
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description: "Max matches (default: 50).",
|
||||
},
|
||||
},
|
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required: ["pattern"],
|
||||
},
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||||
},
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{
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name: "list_directory",
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description: "List files and subdirectories under src/.",
|
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inputSchema: {
|
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type: "object" as const,
|
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properties: {
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path: {
|
||||
type: "string",
|
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description: "Relative path from src/, e.g. 'services'. '' for root.",
|
||||
},
|
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},
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required: ["path"],
|
||||
},
|
||||
},
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{
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name: "get_architecture",
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description:
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"Get a high-level architecture overview of Claude Code.",
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inputSchema: { type: "object" as const, properties: {} },
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||||
},
|
||||
],
|
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}));
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server.setRequestHandler(
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CallToolRequestSchema,
|
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async (request: {
|
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params: { name: string; arguments?: Record<string, unknown> };
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}) => {
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const { name, arguments: args } = request.params;
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switch (name) {
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case "list_tools": {
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const tools = await getToolList();
|
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return {
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content: [
|
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{ type: "text" as const, text: JSON.stringify(tools, null, 2) },
|
||||
],
|
||||
};
|
||||
}
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||||
|
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case "list_commands": {
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const commands = await getCommandList();
|
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return {
|
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content: [
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||||
{
|
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type: "text" as const,
|
||||
text: JSON.stringify(commands, null, 2),
|
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},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "get_tool_source": {
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const toolName = (args as Record<string, unknown>)
|
||||
?.toolName as string;
|
||||
if (!toolName) throw new Error("toolName is required");
|
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const toolDir = safePath(`tools/${toolName}`);
|
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if (!toolDir || !(await dirExists(toolDir)))
|
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throw new Error(`Tool not found: ${toolName}`);
|
||||
|
||||
let fileName = (args as Record<string, unknown>)?.fileName as
|
||||
| string
|
||||
| undefined;
|
||||
if (!fileName) {
|
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const files = await listDir(toolDir);
|
||||
const main =
|
||||
files.find(
|
||||
(f) => f === `${toolName}.ts` || f === `${toolName}.tsx`
|
||||
) ??
|
||||
files.find((f) => f.endsWith(".ts") || f.endsWith(".tsx"));
|
||||
if (!main) throw new Error(`No source files in ${toolName}`);
|
||||
fileName = main;
|
||||
}
|
||||
|
||||
const filePath = safePath(`tools/${toolName}/${fileName}`);
|
||||
if (!filePath || !(await fileExists(filePath)))
|
||||
throw new Error(`File not found: tools/${toolName}/${fileName}`);
|
||||
const content = await fs.readFile(filePath, "utf-8");
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: "text" as const,
|
||||
text: `// tools/${toolName}/${fileName}\n// ${content.split("\n").length} lines\n\n${content}`,
|
||||
},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "get_command_source": {
|
||||
const commandName = (args as Record<string, unknown>)
|
||||
?.commandName as string;
|
||||
if (!commandName) throw new Error("commandName is required");
|
||||
|
||||
const candidates = [
|
||||
`commands/${commandName}`,
|
||||
`commands/${commandName}.ts`,
|
||||
`commands/${commandName}.tsx`,
|
||||
];
|
||||
let found: string | null = null;
|
||||
let isDir = false;
|
||||
for (const c of candidates) {
|
||||
const abs = safePath(c);
|
||||
if (abs && (await dirExists(abs))) {
|
||||
found = abs;
|
||||
isDir = true;
|
||||
break;
|
||||
}
|
||||
if (abs && (await fileExists(abs))) {
|
||||
found = abs;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (!found) throw new Error(`Command not found: ${commandName}`);
|
||||
|
||||
if (!isDir) {
|
||||
const content = await fs.readFile(found, "utf-8");
|
||||
return { content: [{ type: "text" as const, text: content }] };
|
||||
}
|
||||
|
||||
const reqFile = (args as Record<string, unknown>)?.fileName as
|
||||
| string
|
||||
| undefined;
|
||||
if (reqFile) {
|
||||
const filePath = safePath(`commands/${commandName}/${reqFile}`);
|
||||
if (!filePath || !(await fileExists(filePath)))
|
||||
throw new Error(
|
||||
`File not found: commands/${commandName}/${reqFile}`
|
||||
);
|
||||
const content = await fs.readFile(filePath, "utf-8");
|
||||
return { content: [{ type: "text" as const, text: content }] };
|
||||
}
|
||||
|
||||
const files = await listDir(found);
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: "text" as const,
|
||||
text: `Command: ${commandName}\nFiles:\n${files.map((f) => ` ${f}`).join("\n")}`,
|
||||
},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "read_source_file": {
|
||||
const relPath = (args as Record<string, unknown>)?.path as string;
|
||||
if (!relPath) throw new Error("path is required");
|
||||
const abs = safePath(relPath);
|
||||
if (!abs || !(await fileExists(abs)))
|
||||
throw new Error(`File not found: ${relPath}`);
|
||||
const content = await fs.readFile(abs, "utf-8");
|
||||
const lines = content.split("\n");
|
||||
const start =
|
||||
((args as Record<string, unknown>)?.startLine as number) ?? 1;
|
||||
const end =
|
||||
((args as Record<string, unknown>)?.endLine as number) ??
|
||||
lines.length;
|
||||
const slice = lines.slice(
|
||||
Math.max(0, start - 1),
|
||||
Math.min(lines.length, end)
|
||||
);
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: "text" as const,
|
||||
text: slice
|
||||
.map(
|
||||
(l: string, i: number) =>
|
||||
`${(start + i).toString().padStart(5)} | ${l}`
|
||||
)
|
||||
.join("\n"),
|
||||
},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "search_source": {
|
||||
const pattern = (args as Record<string, unknown>)
|
||||
?.pattern as string;
|
||||
if (!pattern) throw new Error("pattern is required");
|
||||
const filePattern = (args as Record<string, unknown>)
|
||||
?.filePattern as string | undefined;
|
||||
const maxResults =
|
||||
((args as Record<string, unknown>)?.maxResults as number) ?? 50;
|
||||
|
||||
let regex: RegExp;
|
||||
try {
|
||||
regex = new RegExp(pattern, "i");
|
||||
} catch {
|
||||
throw new Error(`Invalid regex pattern: ${pattern}`);
|
||||
}
|
||||
|
||||
const allFiles = await walkFiles(SRC_ROOT);
|
||||
const filtered = filePattern
|
||||
? allFiles.filter((f) => f.endsWith(filePattern))
|
||||
: allFiles;
|
||||
|
||||
const matches: string[] = [];
|
||||
for (const file of filtered) {
|
||||
if (matches.length >= maxResults) break;
|
||||
const abs = path.join(SRC_ROOT, file);
|
||||
let content: string;
|
||||
try {
|
||||
content = await fs.readFile(abs, "utf-8");
|
||||
} catch {
|
||||
continue;
|
||||
}
|
||||
const lines = content.split("\n");
|
||||
for (let i = 0; i < lines.length; i++) {
|
||||
if (matches.length >= maxResults) break;
|
||||
if (regex.test(lines[i]!)) {
|
||||
matches.push(`${file}:${i + 1}: ${lines[i]!.trim()}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: "text" as const,
|
||||
text:
|
||||
matches.length > 0
|
||||
? `Found ${matches.length} match(es):\n\n${matches.join("\n")}`
|
||||
: "No matches found.",
|
||||
},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "list_directory": {
|
||||
const relPath =
|
||||
((args as Record<string, unknown>)?.path as string) ?? "";
|
||||
const abs = safePath(relPath);
|
||||
if (!abs || !(await dirExists(abs)))
|
||||
throw new Error(`Directory not found: ${relPath}`);
|
||||
const entries = await listDir(abs);
|
||||
return {
|
||||
content: [
|
||||
{
|
||||
type: "text" as const,
|
||||
text:
|
||||
entries.length > 0
|
||||
? entries.join("\n")
|
||||
: "(empty directory)",
|
||||
},
|
||||
],
|
||||
};
|
||||
}
|
||||
|
||||
case "get_architecture": {
|
||||
const topLevel = await listDir(SRC_ROOT);
|
||||
const tools = await getToolList();
|
||||
const commands = await getCommandList();
|
||||
|
||||
const overview = `# Claude Code Architecture Overview
|
||||
|
||||
## Source Root
|
||||
${SRC_ROOT}
|
||||
|
||||
## Top-Level Entries
|
||||
${topLevel.map((e) => `- ${e}`).join("\n")}
|
||||
|
||||
## Agent Tools (${tools.length})
|
||||
${tools.map((t) => `- **${t.name}** — ${t.files.length} files: ${t.files.join(", ")}`).join("\n")}
|
||||
|
||||
## Slash Commands (${commands.length})
|
||||
${commands.map((c) => `- **${c.name}** ${c.isDirectory ? "(directory)" : "(file)"}${c.files ? ": " + c.files.join(", ") : ""}`).join("\n")}
|
||||
|
||||
## Key Files
|
||||
- **main.tsx** — CLI entrypoint (Commander.js)
|
||||
- **QueryEngine.ts** — Core LLM API caller, streaming, tool loops
|
||||
- **Tool.ts** — Base tool types, schemas, permission model
|
||||
- **commands.ts** — Command registry and loader
|
||||
- **tools.ts** — Tool registry and loader
|
||||
- **context.ts** — System/user context collection
|
||||
|
||||
## Core Subsystems
|
||||
- **bridge/** — IDE integration (VS Code, JetBrains)
|
||||
- **coordinator/** — Multi-agent orchestration
|
||||
- **services/mcp/** — MCP client connections
|
||||
- **services/api/** — Anthropic API client
|
||||
- **plugins/** — Plugin system
|
||||
- **skills/** — Skill system
|
||||
- **tasks/** — Background task management
|
||||
- **server/** — Server/remote mode
|
||||
`;
|
||||
return { content: [{ type: "text" as const, text: overview }] };
|
||||
}
|
||||
|
||||
default:
|
||||
throw new Error(`Unknown tool: ${name}`);
|
||||
}
|
||||
}
|
||||
);
|
||||
|
||||
return server;
|
||||
}
|
||||
|
||||
/** Validate that SRC_ROOT exists. Exits with error if not. */
|
||||
export async function validateSrcRoot(): Promise<void> {
|
||||
if (!(await dirExists(SRC_ROOT))) {
|
||||
console.error(
|
||||
`Error: Claude Code src/ directory not found at ${SRC_ROOT}`
|
||||
);
|
||||
console.error(
|
||||
"Set CLAUDE_CODE_SRC_ROOT environment variable to the src/ directory path."
|
||||
);
|
||||
process.exit(1);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user