Subagents should inherit parent session hooks and permission rules

Problem

When using the Task tool to launch subagents (Explore, Plan, general-purpose, Bash), the subagents do not inherit:

1. PreToolUse hooks defined in .claude/settings.json
2. Permission allow/deny rules from .claude/settings.json
3. CLAUDE.md instructions
4. Project memory files

This means project-level safety enforcement (e.g., a hook that blocks cd to the project root, or deny rules for destructive commands) silently stops working when subagents are involved.

Current Behavior

• Parent session has a PreToolUse hook on Bash that blocks cd to the project root
• Parent session has permission rules allowing read-only commands without prompting
• Subagents launched via Task(subagent_type="Explore") ignore both — they cd into the project root freely and prompt for permission on commands the parent auto-allows

Expected Behavior

Subagents should inherit all hooks and permission rules from the parent session's .claude/settings.json by default, ensuring consistent enforcement across the entire agent tree.

Current Workaround

Creating custom agent definitions in .claude/agents/ that manually replicate each hook:

---
name: explore
hooks:
  PreToolUse:
    - matcher: "Bash"
      hooks:
        - type: command
          command: "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/no-cd-project-root.sh"
---

This is fragile because:

• Every new hook in settings.json must be manually duplicated into every agent file
• The agent definitions can drift out of sync with the actual settings
• New subagent types require new override files
• It embeds project rules in prose that the AI may not follow, whereas hooks are deterministic

Proposed Solution

Add a configuration option (or make it the default) to propagate parent session hooks and permission rules to all subagents:

{
  "permissions": {
    "propagateToSubagents": true
  },
  "hooks": {
    "propagateToSubagents": true
  }
}

Or simply make inheritance the default behavior, since hooks and permissions represent project-level safety constraints that should apply everywhere.

Environment

• Claude Code CLI
• macOS (Darwin 25.3.0)
• Using .claude/settings.json with PreToolUse hooks and permission allow/deny rules