[FEATURE] subagents share a single temp file or clean up after themselves

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

'echo "tmpclaude-*" >> .gitignore' only hides these (dead?) root-level files. In my case the contents of these temp files are all the same (hence the suggestion to share between subagents).
In addition to several of these files, I see a similar 'nul' file in the root directory.

Proposed Solution

These temporary files are not visible to the file system after the agent is done. Maybe as simple as deleting the file during the agent cleanup.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_