[Bug] bypassPermissions mode: sub-agents still prompt for file creation confirmation

Bug Description

When defaultMode is set to bypassPermissions in ~/claudesettingsjson, sub-agents spawned via the Agent tool still prompt the user for file creation confirmation (Write tool), despite the parent session correctly operating in bypass mode

Environment

• Claude Code CLI
• macOS (Darwin 2340)

Settings

{
  "permissions": {
    "allow": ["Read", "Edit", "Write", "Grep", "Glob", "Agent", "Bash(*)"],
    "defaultMode": "bypassPermissions"
  },
  "skipDangerousModePermissionPrompt": true
}

Steps to Reproduce

1 Configure defaultMode: "bypassPermissions" in global settings
2 Confirm bypass mode is active (status bar shows "bypass permissions on")
3 Use the Agent tool to spawn multiple sub-agents in parallel (3+ agents)
4 Have a sub-agent attempt to create a new file using the Write tool

Expected Behavior

Sub-agents should inherit the parent session's bypassPermissions mode and create files without prompting

Actual Behavior

A confirmation prompt appears:

Do you want to create work-notesmd?
  1 Yes
> 2 Yes, allow all edits during this session (shift+tab)
  3 No

This happens even though:

• The parent session's Write calls work without prompting
• The status bar clearly shows "bypass permissions on (shift+tab to cycle)"
• Write is explicitly in the allow list

Additional Context

• The prompt appeared during parallel agent execution (3 agents running simultaneously)
• The parent session had already successfully used Write without prompting moments before
• This may be a race condition or an issue with permission mode inheritance in sub-agent contexts