{...}: let
  mk = key: action: desc: {
    mode = "n";
    inherit key action;
    options = {
      silent = true;
      inherit desc;
    };
  };

  mkRaw = key: raw: desc: {
    mode = "n";
    key = key;
    action.__raw = raw;
    options = {
      silent = true;
      desc = desc;
    };
  };
in {
  programs.nixvim.keymaps = [
    # LSP
    (mkRaw "K" "vim.lsp.buf.hover" "LSPエラーのホバー表示")
    (mkRaw "gd" "vim.lsp.buf.definition" "定義へ移動")
    (mkRaw "gr" "vim.lsp.buf.references" "参照を表示")
    (mkRaw "<leader>rn" "vim.lsp.buf.rename" "シンボル名を一括変換")
    (mkRaw "<leader>cf" "function() require('conform').format({ timeout_ms = 1000, lsp_format = 'fallback' }) end" "コードをフォーマット")
    (mkRaw "<leader>ca" "function() vim.lsp.buf.code_action({ context = { diagnostics = vim.diagnostic.get(0, { lnum = vim.fn.line('.') - 1 }) } }) end" "コードアクション")

    # Diagnostics
    (mkRaw "]d" "vim.diagnostic.goto_next" "次のエラー")
    (mkRaw "[d" "vim.diagnostic.goto_prev" "前のエラー")
    (mkRaw "<leader>dl" "vim.diagnostic.open_float" "エラー詳細")

    # File tree
    (mk "<leader>e" "<cmd>Neotree toggle left<CR>" "ファイルツリー")

    # Terminal
    (mk "<leader>tt" "<cmd>ToggleTerm direction=float<CR>" "ターミナル")

    # Diagnostics list
    (mk "<leader>xx" "<cmd>Trouble diagnostics toggle<CR>" "エラー一覧")

    # Window navigation
    (mk "<C-h>" "<C-w>h" "左のウィンドウへ")
    (mk "<C-j>" "<C-w>j" "下のウィンドウへ")
    (mk "<C-k>" "<C-w>k" "上のウィンドウへ")
    (mk "<C-l>" "<C-w>l" "右のウィンドウへ")

    # Buffer Bar
    (mk "[b" "<Cmd>BufferPrevious<CR>" "前のバッファーに移動")
    (mk "]b" "<Cmd>BufferNext<CR>" "後のバッファーに移動")
    (mk "<leader>bc" "<Cmd>BufferClose<CR>" "バッファーを削除")

    # Git
    (mk "<leader>gl" "<cmd>LazyGit<CR>" "LazyGitを開く")
    (mk "<leader>gd" "<cmd>DiffviewOpen<CR>" "差分を開く")
    (mk "<leader>gH" "<cmd>DiffviewFileHistory<CR>" "リポジトリ履歴")
    (mk "<leader>gh" "<cmd>DiffviewFileHistory %<CR>" "ファイル履歴")
    (mk "<leader>gq" "<cmd>DiffviewClose<CR>" "差分を閉じる")

    # UFO (folding)
    (mkRaw "zR" "require('ufo').openAllFolds" "全て展開")
    (mkRaw "zM" "require('ufo').closeAllFolds" "全て折りたたむ")

    # Dropbar
    (mkRaw "<leader>dp" "function() require('dropbar.api').pick() end" "dropbarでナビゲート")

    # Telescope (explicit form for reliability)
    (mkRaw "<leader>ff" "function() require('telescope.builtin').find_files() end" "ファイルを探す")
    (mkRaw "<leader>fg" "function() require('telescope.builtin').live_grep() end" "文字列を全文検索")
    (mkRaw "<leader>fb" "function() require('telescope.builtin').buffers() end" "開いているバッファを探す")
    (mkRaw "<leader>fh" "function() require('telescope.builtin').help_tags() end" "ヘルプ項目を探す")
  ];
}