Split niri, hypr, fish into submodules; tmux, tmux-palette, television, yazi into externals

docs/terminal/index.mdx

@@ -11,7 +11,7 @@ kitty is the primary terminal. It runs in three modes: plain kitty (kitty owns s
 | --- | --- | --- |
 | [kitty](/terminal/kitty) | `dot_config/kitty/` | Main config, host configs (tmux, herdr, goliath), kittens, custom tab bar |
 | [Ghostty](/terminal/ghostty) | `dot_config/ghostty/` | tmux-only terminal: ctrl+shift chords → tmux, themes |
-| [tmux](/terminal/tmux) | `dot_config/tmux/` | Prefix, bindings, kitty-style tabs with Nerd Font icons, resurrect/continuum persistence, Niri titles |
+| [tmux](/terminal/tmux) | external repo via `.chezmoiexternals/tmux.toml` | Prefix, bindings, kitty-style tabs with Nerd Font icons, resurrect/continuum persistence, Niri titles |
 | [herdr](/terminal/herdr) | `dot_config/herdr/`, `dot_config/herdr-nvim/` | Agent-aware multiplexer: keys, theme, plugins, Claude hook |
 
 ## Shared conventions

docs/terminal/tmux.mdx

@@ -7,11 +7,11 @@ Terminal multiplexer. [Ghostty](/terminal/ghostty) runs nothing but tmux, and Gh
 
 | | |
 | --- | --- |
-| Source | `dot_config/tmux/tmux.conf`, `dot_config/tmux/tmux-nerd-font-window-name.yml`, `dot_config/tmux/executable_tab-label.sh`, `dot_config/tmux/executable_niri-title.sh` |
+| Source | [prdlk/tmux](https://github.com/prdlk/tmux) via `.chezmoiexternals/tmux.toml`: `tmux.conf`, `tmux-nerd-font-window-name.yml`, `tab-label.sh` |
 | Target | `~/.config/tmux/` |
 | Install | `tmux` in `.chezmoidata/packages.yaml` (pacman, brew) |
 
-tpm is a `git-repo` external in `.chezmoiexternal.toml`, cloned to `~/.config/tmux/plugins/tpm` when missing. `tmux.conf` ends with `run '~/.config/tmux/plugins/tpm/tpm'`. Plugins installed by tpm (`prefix I`) land next to it and are ignored by chezmoi. `dot_config/tmux-palette/` (→ `~/.config/tmux-palette/`) holds the [palette](#command-palette) config.
+`~/.config/tmux` is a `git-repo` external checkout, not chezmoi-managed contents; edit it in place and commit and push from there. tpm is a separate `git-repo` external in `.chezmoiexternal.toml`, cloned to `~/.config/tmux/plugins/tpm` inside that checkout when missing. `tmux.conf` ends with `run '~/.config/tmux/plugins/tpm/tpm'`. Plugins installed by tpm (`prefix I`) land next to it; the tmux repo's `.gitignore` excludes `plugins/` and chezmoi ignores them. [prdlk/tmux-palette](https://github.com/prdlk/tmux-palette) (`.chezmoiexternals/tmux-palette.toml`, → `~/.config/tmux-palette/`) holds the [palette](#command-palette) config.
 
 ## Options
 
@@ -92,7 +92,7 @@ Labels longer than 27 characters end in `…`. The icon comes from tmux-nerd-fon
 
 ### Command palette
 
-`ctrl+space` opens tmux-palette, a fuzzy command list in a popup. Its user config lives in `~/.config/tmux-palette/` (source `dot_config/tmux-palette/`):
+`ctrl+space` opens tmux-palette, a fuzzy command list in a popup. Its user config lives in `~/.config/tmux-palette/` (the [prdlk/tmux-palette](https://github.com/prdlk/tmux-palette) external):
 
 | File | Contents |
 | --- | --- |
@@ -111,9 +111,9 @@ resurrect saves sessions, windows, panes, cwds, pane contents, and a default set
 
 `show-name: false`, because `automatic-rename-format` supplies the label. The icon sits on the left, with a fallback icon and a blank multi-pane icon. Icons are defined for `mprocs`, `mm`, `macmon`, `make`, `zsh`, `nvim`, `devbox`, `psql`, `yazi`, `lazygit`, `gh`, `tv`, `docker`, `bun`, `node`, `npm`, `pnpm`, `go`, `bunx`, `claude`, `omp`, and `gitframe`. The plugin parses the YAML with awk and does not interpret `\U` escapes, so the glyphs are literal characters.
 
-## niri-title.sh
+## tmux-niri-title
 
-Installed only on Linux `desktop`/`laptop` roles (gated in `.chezmoiignore.tmpl`). Given the pane command, path, tty, and title, it prints a context segment for the window title read by [Niri](/desktop/niri). It picks the first match:
+`dot_local/bin/executable_tmux-niri-title` → `~/.local/bin/tmux-niri-title`. POSIX sh, installed on every OS and role. Given the pane command, path, tty, and title, it prints a context segment for a window title such as the one read by [Niri](/desktop/niri). It picks the first match:
 
 1. `ssh`/`mosh-client`/`autossh`/`et`: the remote target.
 2. `nvim`/`vim`: the pane title (current file).