function keyme -d "Generate (or regenerate) an ed25519 SSH key for Gitea and configure ~/.ssh/config"
    set -l key_path "$HOME/.ssh/id_ed25519_gitea"
    set -l pub_path "$key_path.pub"
    set -l config_path "$HOME/.ssh/config"
    set -l host "gitssh.toomuchtaco.net"

    # ── Step 1: Handle existing key ─────────────────────────────────────────
    if test -f "$key_path"
        echo "An SSH key already exists at $key_path"
        read -p 'echo "Overwrite it? [y/N] "' -l confirm
        if test "$confirm" != "y" -a "$confirm" != "Y"
            echo "Aborted."
            return 1
        end
        echo ""
    end

    # ── Step 2: Generate the key ────────────────────────────────────────────
    # -t ed25519:  modern, secure, fast elliptic-curve key
    # -f:          output file
    # -N "":       empty passphrase (prompts to set one if desired)
    ssh-keygen -t ed25519 -f "$key_path" -N ""
    echo ""

    # ── Step 3: Update ~/.ssh/config ────────────────────────────────────────
    # If the host block already exists, update the IdentityFile line in place.
    # Otherwise, append a new block at the end of the file.

    if grep -q "^Host $host\$" "$config_path" 2>/dev/null
        # Host block exists — update the IdentityFile line.
        # If an IdentityFile line already exists under this Host, replace it;
        # otherwise add one after the HostName line.
        if grep -A5 "^Host $host\$" "$config_path" | grep -q "IdentityFile"
            sed -i "/^Host $host\$/,/^Host /s|IdentityFile .*|IdentityFile $key_path|" "$config_path"
            echo "Updated IdentityFile for Host $host in $config_path"
        else
            sed -i "/^Host $host\$/,/^Host /s|HostName .*|&\n\tIdentityFile $key_path|" "$config_path"
            echo "Added IdentityFile for Host $host in $config_path"
        end
    else
        # No Host block yet — append one.
        # printf interprets \t as a literal tab (unlike echo in Fish).
        printf "\n# Gitea\nHost %s\n\tHostName %s\n\tUser git\n\tIdentityFile %s\n" \
            "$host" "$host" "$key_path" >>"$config_path"
        echo "Appended Host block for $host to $config_path"
    end

    # ── Step 4: Set correct permissions ────────────────────────────────────
    chmod 600 "$key_path"
    chmod 644 "$pub_path"
    chmod 600 "$config_path"

    echo ""

    # ── Step 5: Prompt for Git identity ────────────────────────────────────
    set -l current_name (git config --global user.name 2>/dev/null)
    set -l current_email (git config --global user.email 2>/dev/null)

    if test -n "$current_name"
        read -p 'echo "Git user name ($current_name): "' -l git_name
        if test -z "$git_name"
            set git_name "$current_name"
        end
    else
        read -p 'echo "Git user name: "' -l git_name
    end

    if test -n "$current_email"
        read -p 'echo "Git user email ($current_email): "' -l git_email
        if test -z "$git_email"
            set git_email "$current_email"
        end
    else
        read -p 'echo "Git user email: "' -l git_email
    end

    git config --global user.name "$git_name"
    git config --global user.email "$git_email"
    echo "  Git identity set to $git_name <$git_email>"
    echo ""

    # ── Step 6: Print the public key ────────────────────────────────────────
    echo "=============================="
    echo "  Public key (add to Gitea):  "
    echo "=============================="
    echo ""
    cat "$pub_path"
    echo ""
    echo "=============================="
    echo "Key copied to clipboard if pbcopy/xclip is available."
    if command -v pbcopy &>/dev/null
        cat "$pub_path" | pbcopy
        echo "(copied to clipboard via pbcopy)"
    else if command -v xclip &>/dev/null
        cat "$pub_path" | xclip -selection clipboard
        echo "(copied to clipboard via xclip)"
    else if command -v wl-copy &>/dev/null
        cat "$pub_path" | wl-copy
        echo "(copied to clipboard via wl-copy)"
    end
    echo "=============================="
end