doc: tool-parity plan — Gemini CLI vs Claude Code gap analysis + homelab admin tool specs

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -17,6 +17,15 @@ agent understands the result without opening an image viewer.
 Each tool has its own folder, its own README with the full format/CLI
 reference, its own tests and its own dev branch (`dev/<tool>`).
 
+## Planned: agent-capability & homelab-admin tools
+
+[`doc/tool-parity.md`](doc/tool-parity.md) compares Gemini CLI's
+built-in tools with Claude Code's, and specs the CLI tools that close
+the gaps (`notifyr`, `giteactl`, `waitfor`, `cronr`, `fleet`,
+`envaudit`, `reghelper`, `pagepub`, `nbcell`, `wtreectl`, `fanout`) so
+any agent gets the same capabilities via `run_shell_command`. Build
+order and rationale live there and in [`doc/plan.md`](doc/plan.md).
+
 ## Building
 
 ```bash