fix: restore missing prepare-publish.js for claude-code-agent (v0.0.4)

The prepare-publish.js file was accidentally deleted during the directory
architecture refactoring in commit 1a5f484. This restores the file with
the correct implementation following the same pattern as other MCP servers.

Also bumps version to 0.0.4 to trigger CI build and verify the fix works.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: tadasant

experimental/claude-code-agent/local/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-code-agent-mcp-server",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "Local implementation of claude-code-agent MCP server",
   "mcpName": "claude-code-agent",
   "main": "build/index.js",

experimental/claude-code-agent/local/prepare-publish.js

@@ -0,0 +1,64 @@
+#!/usr/bin/env node
+import { cp, rm } from 'fs/promises';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+import { execSync } from 'child_process';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+async function prepare() {
+  console.log('Preparing for publish...');
+
+  // First, ensure TypeScript is available
+  console.log('Installing TypeScript for build...');
+  try {
+    execSync('npm install --no-save typescript @types/node', { stdio: 'inherit' });
+  } catch (e) {
+    console.error('Failed to install TypeScript:', e.message);
+    process.exit(1);
+  }
+
+  // Build shared directory first
+  const sharedDir = join(__dirname, '../shared');
+  console.log('Building shared directory...');
+  try {
+    execSync('npm install && npm run build', { cwd: sharedDir, stdio: 'inherit' });
+  } catch (e) {
+    console.error('Failed to build shared directory:', e.message);
+    process.exit(1);
+  }
+
+  // Set up the shared directory for the build
+  console.log('Setting up shared directory for build...');
+  try {
+    // Create a symlink for the build process (like setup-dev.js does)
+    await rm(join(__dirname, 'shared'), { recursive: true, force: true });
+    execSync(`node setup-dev.js`, { cwd: __dirname, stdio: 'inherit' });
+  } catch (e) {
+    console.error('Failed to set up shared directory:', e.message);
+    process.exit(1);
+  }
+
+  // Now build the local package
+  console.log('Building local package...');
+  try {
+    execSync('npx tsc && npx tsc -p tsconfig.integration.json', { stdio: 'inherit' });
+  } catch (e) {
+    console.error('Failed to build local package:', e.message);
+    process.exit(1);
+  }
+
+  // Clean up the symlink and copy the actual files for publishing
+  try {
+    await rm(join(__dirname, 'shared'), { recursive: true, force: true });
+  } catch (e) {
+    // Ignore if doesn't exist
+  }
+
+  // Copy the built shared files
+  await cp(join(__dirname, '../shared/build'), join(__dirname, 'shared'), { recursive: true });
+
+  console.log('Copied shared files to local package');
+}
+
+prepare().catch(console.error);