kitty: color terminal tabs by ssh/mosh host

Tint the kitty tab background by target host so local vs remote (and
which remote) is visible at a glance.

- __kitty_host_color: explicit color table for known hosts (routers,
  resolvers, ryzen/mini, personal cloud, geo VPS) + stable hashed
  palette fallback; auto-picks readable fg by luminance
- __kitty_ssh_host: parse target host from ssh/mosh-style argv
- __kitty_tab_set/__kitty_tab_reset: active tab = full host-color bg,
  inactive tab = dark theme bg with host-color text; revert on exit
- ssh wrapper + s (kitten ssh) and m (mosh) wired to tint/reset

Also includes unrelated pending dotfile changes (GH MCP PAT from
keychain in fish/zsh, kitty/wezterm font_size 15->14, kitty
colorspace displayp3) committed together at user request.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dot_zshrc

@@ -33,3 +33,5 @@ command -v atuin >/dev/null 2>&1 && eval "$(atuin init zsh --disable-up-arrow)"
 
 # Added by LM Studio CLI (lms)
 export PATH="$PATH:$HOME/.cache/lm-studio/bin"
+
+[[ -r "$HOME/.codex/github-mcp-env.zsh" ]] && source "$HOME/.codex/github-mcp-env.zsh"

private_dot_config/kitty/kitty.conf

@@ -13,6 +13,7 @@ map cmd+7 goto_tab 7
 map cmd+8 goto_tab 8
 map cmd+9 goto_tab 9
 map shift+enter send_text all \x1b[13;2u
+
 cursor_trail 0
 shell_integration no-cursor
 cursor_shape beam
@@ -84,7 +85,7 @@ font_features Menligaturized-Regular -liga
 #font_family MesloLGS NF
 		shell .
 		allow_remote_control yes
-		font_size 15
+		font_size 14
 #macos_thicken_font 1
 
 		text_composition_strategy 1.7 50
@@ -1603,8 +1604,8 @@ macos_menubar_title_max_length 0
 #: mouse cursor invisible on dual GPU machines. Changing this option
 #: by reloading the config is not supported.
 
-#macos_colorspace displayp3
+macos_colorspace displayp3
-macos_colorspace srgb
+#macos_colorspace srgb
 
 #: The colorspace in which to interpret terminal colors. The default
 #: of srgb will cause colors to match those seen in web browsers. The

private_dot_config/private_fish/config.fish

@@ -62,6 +62,7 @@ if type -q ip
 end
 
 function s
+    __kitty_tab_set (__kitty_ssh_host $argv)
     # auto-tmux when called as: s <host> <session>
     if test (count $argv) -eq 2; and not string match -q -- '-*' $argv[1]; and not string match -q -- '-*' $argv[2]
         set -l host $argv[1]
@@ -69,24 +70,28 @@ function s
         if test "$TERM" = xterm-kitty
             kitten ssh $host -t "tmux new-session -A -s $session"
         else
-            ssh $host -t "tmux new-session -A -s $session"
+            command ssh $host -t "tmux new-session -A -s $session"
         end
+        __kitty_tab_reset
         return
     end
 
     if test "$TERM" = xterm-kitty
         kitten ssh $argv
     else
-        ssh $argv
+        command ssh $argv
     end
+    __kitty_tab_reset
 end
 
 function m
+    __kitty_tab_set (__kitty_ssh_host $argv)
     # auto-tmux when called as: m <host> <session>
     if test (count $argv) -eq 2; and not string match -q -- '-*' $argv[1]; and not string match -q -- '-*' $argv[2]
         set -l host $argv[1]
         set -l session $argv[2]
         command mosh -A $host -- env KITTY_MOSH=1 tmux new-session -A -s $session
+        __kitty_tab_reset
         return
     end
 
@@ -95,6 +100,7 @@ function m
     else
         command mosh -A $argv -- env KITTY_MOSH=1 sh -lc 'exec "${SHELL:?}" -l'
     end
+    __kitty_tab_reset
 end
 
 
@@ -181,3 +187,6 @@ fish_add_path $HOME/.antigravity/antigravity/bin
 # Added by OrbStack: command-line tools and integration
 # This won't be added again if you remove it.
 source ~/.orbstack/shell/init2.fish 2>/dev/null || :
+
+# GitHub MCP plugin auth — pull PAT from keychain (avoids plaintext in config files)
+set -gx GITHUB_PERSONAL_ACCESS_TOKEN (security find-generic-password -s codex-github-mcp-pat -w 2>/dev/null)

private_dot_config/private_fish/functions/__kitty_host_color.fish

@@ -0,0 +1,58 @@
+function __kitty_host_color -d "Map an ssh host/alias to a stable 'bg fg' hex pair for the kitty tab"
+    set -l host $argv[1]
+
+    # ---- Explicit table for known hosts (alias OR resolved hostname) ----
+    # Keep colors meaningful: infra/routers = warm/danger, personal cloud = blue,
+    # local heavy box = green, geo VPS = a varied but recognizable palette.
+    set -l bg
+    switch $host
+        # Routers / network gear — orange = "you are touching the plumbing"
+        case '192.168.1.1' '192.168.15.1' 'proxmox'
+            set bg ff8c00
+        # Home Unbound resolvers (see reset-zone) — amber, sibling of routers
+        case '192.168.88.88' '192.168.11.11'
+            set bg d79921
+        # ryzen / mini — local powerhouse boxes — green
+        case ryzen mini 'mini.*' 'mini-*'
+            set bg 689d6a
+        # Personal cloud (beslan / setia / zephyr.setia.cloud) — blue
+        case 'beslan*' setia 'setia*' 'zephyr*' '*.setia.cloud'
+            set bg 2e84e6
+        # Riga boxes — teal
+        case 'riga*'
+            set bg 1abc9c
+        # Finland / Helsinki — purple
+        case fi 'fi-*' hel hel2
+            set bg 9b59b6
+        # US (NJ / NY) — red-ish, "far away prod"
+        case nj 'nj-*' ny 'ny-*'
+            set bg e74c3c
+        # Stockholm / Tallinn / Vilnius / Krasnodar / Voronezh — slate blue
+        case sth tln vln krd vrn kz blr highland riga am
+            set bg 5b7bb4
+        case '*'
+            set bg ''
+    end
+
+    # ---- Hash fallback: stable, curated palette so every host is distinct ----
+    set -l kind explicit
+    if test -z "$bg"
+        set kind hash
+        set -l palette 458588 b16286 d65d0e 689d6a d79921 8f3f71 \
+            076678 af3a03 427b58 9d0006 b57614 8ec07c \
+            cc241d 98971a d5c4a1 fb4934
+        set -l n (printf '%s' "$host" | cksum | string split ' ')[1]
+        set -l idx (math "$n % "(count $palette)" + 1")
+        set bg $palette[$idx]
+    end
+
+    # ---- Pick readable fg (black/white) from bg luminance ----
+    set -l r (math "0x"(string sub -s 1 -l 2 $bg))
+    set -l g (math "0x"(string sub -s 3 -l 2 $bg))
+    set -l b (math "0x"(string sub -s 5 -l 2 $bg))
+    set -l lum (math -s0 "0.299 * $r + 0.587 * $g + 0.114 * $b")
+    set -l fg ffffff
+    test $lum -gt 150; and set fg 000000
+
+    echo "#$bg #$fg $kind"
+end

private_dot_config/private_fish/functions/__kitty_ssh_host.fish

@@ -0,0 +1,24 @@
+function __kitty_ssh_host -d "Extract the target host token from ssh/mosh-style argv"
+    # Skip short options that consume a following argument (ssh + mosh-ish).
+    set -l argtaking b c D E e F I i J L l m O o p Q R S W w P
+    set -l host ''
+    set -l skip 0
+    for tok in $argv
+        if test $skip -eq 1
+            set skip 0
+            continue
+        end
+        if string match -q -- '-*' $tok
+            set -l opt (string sub -s 2 -l 1 -- $tok)
+            if test (string length -- $tok) -eq 2; and contains -- $opt $argtaking
+                set skip 1
+            end
+            continue
+        end
+        set host $tok
+        break
+    end
+    set host (string replace -r '.*@' '' -- $host)   # strip user@
+    set host (string replace -r ':.*' '' -- $host)   # strip :port (scp-style)
+    echo $host
+end

private_dot_config/private_fish/functions/__kitty_tab_reset.fish

@@ -0,0 +1,7 @@
+function __kitty_tab_reset -d "Revert kitty tab color/title to theme defaults"
+    set -q KITTY_WINDOW_ID; and type -q kitten
+    or return 0
+    kitten @ set-tab-color active_bg=NONE active_fg=NONE \
+        inactive_bg=NONE inactive_fg=NONE 2>/dev/null
+    kitten @ set-tab-title "" 2>/dev/null
+end

private_dot_config/private_fish/functions/__kitty_tab_set.fish

@@ -0,0 +1,25 @@
+function __kitty_tab_set -d "Tint the current kitty tab for the given ssh/mosh host"
+    set -l host $argv[1]
+    set -q KITTY_WINDOW_ID; and type -q kitten; and test -n "$host"
+    or return 0
+
+    set -l colors (__kitty_host_color $host)
+    # If the typed name only got a hash color, retry with the
+    # ssh_config-resolved hostname (it may be in the explicit table).
+    if test (string split ' ' $colors)[3] = hash
+        set -l resolved (command ssh -G $host 2>/dev/null \
+            | string match -r '^hostname .*' | string split ' ')[2]
+        if test -n "$resolved"; and test "$resolved" != "$host"
+            set -l rcolors (__kitty_host_color $resolved)
+            test (string split ' ' $rcolors)[3] = explicit; and set colors $rcolors
+        end
+    end
+    set -l bg (string split ' ' $colors)[1]
+    set -l fg (string split ' ' $colors)[2]
+
+    # Active tab: full host-color background, readable fg.
+    # Inactive tab: keep theme's dark background (NONE), host color as text only.
+    kitten @ set-tab-color "active_bg=$bg" "active_fg=$fg" \
+        "inactive_bg=NONE" "inactive_fg=$bg" 2>/dev/null
+    kitten @ set-tab-title "$host" 2>/dev/null
+end

private_dot_config/private_fish/functions/ssh.fish

@@ -0,0 +1,11 @@
+function ssh -d "ssh wrapper: tint the kitty tab by target host, reset on exit"
+    if not set -q KITTY_WINDOW_ID; or not type -q kitten
+        command ssh $argv
+        return $status
+    end
+    __kitty_tab_set (__kitty_ssh_host $argv)
+    command ssh $argv
+    set -l rc $status
+    __kitty_tab_reset
+    return $rc
+end

private_dot_config/wezterm/wezterm.lua

@@ -91,7 +91,7 @@ config.quit_when_all_windows_are_closed = false
 config.color_scheme = 'Galaxy'
 config.font = wezterm.font('Jetbrains Mono', { weight = 600 })
 config.freetype_load_target = 'Light'
-config.font_size = 15
+config.font_size = 14
 config.line_height = 1.05
 config.harfbuzz_features = { 'calt=1', 'clig=0', 'liga=0' }