##Describe the bug
When using clawdbot on macOS in a workspace containing deep directory structures (specifically projects with node_modules), the bot fails to execute any shell commands. It crashes immediately with Error: spawn EBADF.
To Reproduce
Steps to reproduce the behavior:

1. On macOS (Apple Silicon), initialize clawdbot in a root directory that contains a sub-project with heavy dependencies (e.g., ~/clawd/skills/my-project/node_modules).
2. Start the bot.
3. Attempt to run a simple command via the agent (e.g., echo "test").
4. Result: The tool crashes with spawn EBADF.
   Expected behavior
   The bot should ignore irrelevant heavy folders like node_modules to preserve system resources and execute commands successfully.
   Error Log / Stack Trace

Error: spawn EBADF at ChildProcess.spawn (node:internal/child_process:420:11) at execute (file://.../dist/agents/bash-tools.exec.js:129:3) ... [tools] bash failed: spawn EBADF

Root Cause Analysis (Deep Dive)
We performed extensive debugging to isolate the issue:

1. Code Integrity: We verified bash-tools.exec.js. Isolated child_process.spawn scripts work perfectly on the same machine. The code is not the issue.
2. Resource Exhaustion: Using lsof -p , we discovered that the clawdbot process was holding >11,500 file descriptors open.
3. The Culprit: The file watcher (chokidar or similar) is recursively watching every single file inside node_modules.
   • Evidence: lsof output showed thousands of lines pointing to .../node_modules/....
4. Mechanism: This exhausts the macOS file descriptor limit (soft limit is often restricted). When exec.js tries to spawn a new process, the OS refuses to allocate new file descriptors for stdin/stdout pipes, resulting in EBADF (Bad File Descriptor).
   Verification
   • Workaround: Removing the node_modules folder from the workspace immediately resolved the issue.
   • System Limits: Manually forcing ulimit -n 65536 and sudo sysctl -w kern.maxfiles=524288 postpones the crash but is not a viable default solution for users.
   Suggested Fix
   The file watcher implementation needs default ignore patterns to prevent monitoring of dependency directories.
   Please add standard ignores:
   • /node_modules/
   • /.git/
   • /dist/
   • Support for .gitignore / .clawdignore
   Environment
   • OS: macOS (Apple Silicon)
   • Node.js: Tested on v22 LTS, v24, v25
   • Version: 2026.1.15