fix(ccw): Add path validation for --cd parameter in CLI executor

Validate working directory path before passing to spawn() to prevent
ENOENT errors when malformed paths are provided. Uses existing
validatePath utility for path validation and existence checks.

- Import validatePath from path-resolver
- Validate cd parameter with mustExist check before use
- Provide clear error message with invalid path details

ccw/src/tools/cli-executor.ts

@@ -9,6 +9,7 @@ import type { HistoryIndexEntry } from './cli-history-store.js';
 import { spawn, ChildProcess } from 'child_process';
 import { existsSync, mkdirSync, readFileSync, writeFileSync, unlinkSync, readdirSync, statSync } from 'fs';
 import { join, relative } from 'path';
+import { validatePath } from '../utils/path-resolver.js';
 
 // Track current running child process for cleanup on interruption
 let currentChildProcess: ChildProcess | null = null;
@@ -675,8 +676,17 @@ async function executeCliTool(
 
   const { tool, prompt, mode, format, model, cd, includeDirs, timeout, resume, id: customId, noNative, category, parentExecutionId } = parsed.data;
 
-  // Determine working directory early (needed for conversation lookup)
-  const workingDir = cd || process.cwd();
+  // Validate and determine working directory early (needed for conversation lookup)
+  let workingDir: string;
+  if (cd) {
+    const validation = validatePath(cd, { mustExist: true });
+    if (!validation.valid) {
+      throw new Error(`Invalid working directory (--cd): ${validation.error}. Path: ${cd}`);
+    }
+    workingDir = validation.path!;
+  } else {
+    workingDir = process.cwd();
+  }
   ensureHistoryDir(workingDir); // Ensure history directory exists
 
   // NEW: Check if model is a custom LiteLLM endpoint ID