Mark untracked directories that are git repositories

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

docs/state-model.md

@@ -72,7 +72,7 @@ truth for what counts as a problem.
 | `conflict` | Merge conflict in the worktree | Danger |
 | `missing` | Not initialized; directory missing | Warn |
 | `off pin` | Checkout differs from pin | Warn |
-| `changed` | Uncommitted changes; untracked files | Warn |
+| `changed` | Uncommitted changes; untracked files (worded "untracked repository" if all of them are git repositories) | Warn |
 
 Rules:
 

docs/ux-guide.md

@@ -91,7 +91,9 @@ Changes   5 files · 2M 1A 1D 1R · +37 −12
   meaning, the color only supports it (N4).
 - Letters and colors: `!` red bold, `M` yellow, `A` green, `D` red, `R`
   cyan, `?` muted. Line counts: green `+n`, red `−n`; `bin` for binary
-  files, `submodule` for a moved nested pin, nothing for untracked files.
+  files, `submodule` for a moved nested pin, `repository` for an untracked
+  directory that is a git repository itself (cloned, never added as a
+  submodule), nothing for other untracked files.
 - Order: kind (`!`, `M`, `A`, `D`, `R`, `?`), then changed lines, largest
   first, because the biggest edits are the ones people remember.
 - Budget: 10 files. Every kind that occurs gets at least one line, the