Add setup keychain ssh agent

fish/conf.d/ssh-keychain.fish

@@ -0,0 +1,15 @@
+# Start keychain and source SSH agent variables for all private keys in ~/.ssh
+if status is-interactive
+    if type -q keychain
+        set -l _ssh_keys
+        for _pub in ~/.ssh/*.pub
+            set -l _key (string replace -r '\.pub$' '' $_pub)
+            if test -f $_key
+                set -a _ssh_keys $_key
+            end
+        end
+        if test (count $_ssh_keys) -gt 0
+            keychain --eval --quiet $_ssh_keys | source
+        end
+    end
+end

fish/config.fish

@@ -0,0 +1,4 @@
+# Machine-specific config (secrets, local overrides) — not tracked in dotfiles
+if test -f ~/.config/fish/local.fish
+    source ~/.config/fish/local.fish
+end