Adds optional path_mappings to agent.yaml so host directories are
transparently mapped to virtual paths in agent responses and CLAUDE.md.
Sanitizer replaces host paths (longest first, both slash styles) before
repoRoot/home substitutions. /new-agent accepts a host:virtual path
option with Windows-safe splitting and fs.existsSync validation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add ChannelQueue in src/runtime/channel-queue.ts.
Router enqueues each message so same-channel requests run serially.
Different channels remain parallel.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
