Feature: Make agent search paths configurable

Description

Currently, Claude Code only searches for agents in two hardcoded locations:

• .claude/agents/ (project level)
• ~/.claude/agents/ (user level)

It would be helpful to allow custom agent search paths via settings configuration.

Use Case

Teams may want to organize agents in different locations, such as:

• .github/agents/ (alongside GitHub workflows)
• tools/agents/ (in a tools directory)
• Other project-specific locations

Proposed Solution

Add a configurable setting (e.g., agentSearchPaths in .claude/settings.json) that allows specifying additional directories to search for agents.

Example:

{
  "agentSearchPaths": [
    ".github/agents",
    "tools/agents"
  ]
}

This would be merged with the default search paths rather than replacing them.

Alternatives Considered

• Symlinks (workaround, but not ideal for teams)
• Moving agents to fixed locations (limits flexibility)