diff --git a/.neoconf.json b/.neoconf.json
new file mode 100644
index 0000000..0690d1a
--- /dev/null
+++ b/.neoconf.json
@@ -0,0 +1,18 @@
+{
+  "neodev": {
+    "library": {
+      "enabled": true,
+      "plugins": ["neoconf.nvim", "nvim-lspconfig"]
+    }
+  },
+  "neoconf": {
+    "plugins": {
+      "lua_ls": {
+        "enabled": true
+      }
+    }
+  },
+  "lspconfig": {
+    "sumneko_lua": {}
+  }
+}
diff --git a/lua/.luarc.json b/lua/.luarc.json
new file mode 100644
index 0000000..0344964
--- /dev/null
+++ b/lua/.luarc.json
@@ -0,0 +1,64 @@
+{
+    "workspace.library": [
+        "/nix/store/7mwww77s7jads5ymvn9vv11vkywfh1sp-vim-pack-dir",
+        "/Users/hungtran/.local/share/nvim/plugged/plenary.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nlua.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-treesitter",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-treesitter-textobjects",
+        "/Users/hungtran/.local/share/nvim/plugged/telescope.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/telescope-fzf-native.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/telescope-file-browser.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-lspconfig",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-nvim-lsp",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-path",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-buffer",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-cmdline",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-cmp",
+        "/Users/hungtran/.local/share/nvim/plugged/lspkind-nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-yati",
+        "/Users/hungtran/.local/share/nvim/plugged/yang.vim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-autopairs",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-ts-autotag",
+        "/Users/hungtran/.local/share/nvim/plugged/guess-indent.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/Comment.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/gitsigns.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/vim-fugitive",
+        "/Users/hungtran/.local/share/nvim/plugged/mason.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/mason-lspconfig.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/harpoon",
+        "/Users/hungtran/.local/share/nvim/plugged/neogit",
+        "/Users/hungtran/.local/share/nvim/plugged/trouble.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/vim-dispatch",
+        "/Users/hungtran/.local/share/nvim/plugged/vim-jack-in",
+        "/Users/hungtran/.local/share/nvim/plugged/vim-dispatch-neovim",
+        "/Users/hungtran/.local/share/nvim/plugged/conjure",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-jqx",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-surround",
+        "/Users/hungtran/.local/share/nvim/plugged/rust-tools.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/inlay-hints.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/gruvbox",
+        "/Users/hungtran/.local/share/nvim/plugged/lualine.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/indent-blankline.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-web-devicons",
+        "/Users/hungtran/.local/share/nvim/plugged/hlargs.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/todo-comments.nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nvim-treesitter-context",
+        "/Users/hungtran/.local/share/nvim/plugged/playground",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp_luasnip",
+        "/Users/hungtran/.local/share/nvim/plugged/LuaSnip",
+        "/Users/hungtran/.local/share/nvim/plugged/zk-nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/vim-caser",
+        "/Users/hungtran/.config/nvim",
+        "/Users/hungtran/.local/share/nvim/site",
+        "/nix/store/2xr2f568qzslyfmb7zw3sdp8kdv0w7qi-neovim-unwrapped-236c207/share/nvim/runtime",
+        "/nix/store/2xr2f568qzslyfmb7zw3sdp8kdv0w7qi-neovim-unwrapped-236c207/lib/nvim",
+        "/Users/hungtran/.local/share/nvim/plugged/nlua.nvim/after",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-nvim-lsp/after",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-path/after",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-buffer/after",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp-cmdline/after",
+        "/Users/hungtran/.local/share/nvim/plugged/playground/after",
+        "/Users/hungtran/.local/share/nvim/plugged/cmp_luasnip/after",
+        "${3rd}/luassert/library"
+    ]
+}
\ No newline at end of file
diff --git a/lua/tsql.lua b/lua/tsql.lua
new file mode 100644
index 0000000..859c2d1
--- /dev/null
+++ b/lua/tsql.lua
@@ -0,0 +1,74 @@
+---@type mod_buf_select
+local buf_select = require('tsql.buf_select')
+
+---@module 'tsql'
+local M = {}
+
+M.ts_query = {}
+---@class TSQuery
+M.TSQuery = {}
+M.sink_by = {}
+---@module 'tsql.format'
+---@alias Format fun(self, nodes: QNode[])
+M.format = {}
+---@class Tsql
+M.Tsql = {}
+
+---NOTE: re-export with implementation
+M.buf_match = require('tsql.buf_select')
+
+function M.ts_query.from_scm(treesitter_query)
+    -- TODO: implement
+    return M.TSQuery
+end
+
+function M.TSQuery:find_locs(files)
+    -- TODO: implement
+    return {}
+end
+
+function M.sink_by.highlight()
+    -- TODO: implement
+end
+
+---@type Format
+function M.format.display()
+    -- TODO: implement
+end
+
+---@type Format
+function M.format.dump()
+    -- TODO: implement
+end
+
+---@param format Format
+function M.sink_by.print(format)
+    -- TODO: implement
+end
+
+---@param format Format
+function M.sink_by.nvim_yank_buf(format)
+    -- TODO: implement
+end
+
+---@return Tsql
+---@param external_dsl string
+function M.s(external_dsl)
+    -- TODO: implement
+end
+
+---@return Tsql
+---@param buf_match BufMatch
+---@param codeql TSQuery
+---@param sink Sink
+function M.t(buf_match, codeql, sink)
+    -- TODO: implement
+end
+
+---NOTE: This is now exiting the functional core and entering
+--- imperative shell
+function M.Tsql:do_nvim()
+    -- TODO: implement
+end
+
+return M
diff --git a/lua/tsql/buf_select.lua b/lua/tsql/buf_select.lua
new file mode 100644
index 0000000..2e0c212
--- /dev/null
+++ b/lua/tsql/buf_select.lua
@@ -0,0 +1,223 @@
+---@module 'buf_select'
+---@class mod_buf_select
+---@alias MatchPredicate fun(nodes: QNode[]): boolean
+local M = {}
+
+---@class QBuf
+---@field bufnr number representing the vim runtime's bufnr, 0 is current buf
+---@field path string the absolute path to the buffer. This uses
+---`vim.api.nvim_buf_get_name(bufnr: number) -> string`
+---Assume [""] if it's erroneous (like a terminal buffer)
+---@field filetype string the associated filetypes gotten from. This uses
+---`vim.api.nvim_buf_get_option(bufnr: number, 'filetype')`
+---@field lang string The language of the treesitter parser. This is gotten
+---from `vim.treesitter.get_parser(bufnr: number):lang() -> string [may fail]`
+---@field is_loaded boolean whether it is loaded
+M.QBuf = {}
+
+---@return string language
+---NOTE: may fail with string
+local function get_lang(bufnr)
+    local status, lang = pcall(function()
+        return vim.treesitter.get_parser(bufnr):lang()
+    end)
+
+    if not status then
+        local path = vim.api.nvim_buf_get_name(bufnr)
+        error(string.format("Error determining language for buffer %d: %s", bufnr, path))
+    end
+
+    return lang
+end
+
+---@param bufnr number
+---@param path string
+---@param filetype string
+---@param lang string
+---@param is_loaded boolean
+---@return QBuf
+function M.QBuf:new(bufnr, path, filetype, lang, is_loaded)
+    assert(type(bufnr) == "number", "bufnr must be a number")
+    assert(type(path) == "string", "path must be a string")
+    assert(type(filetype) == "string", "filetype must be a string")
+    assert(type(lang) == "string", "lang must be a string")
+    assert(type(is_loaded) == "boolean", "is_loaded must be a boolean")
+
+    local qbuf = {
+        bufnr = bufnr,
+        path = path,
+        filetype = filetype,
+        lang = lang,
+        is_loaded = is_loaded
+    }
+    setmetatable(qbuf, self)
+    self.__index = self
+    return qbuf
+end
+
+---@param bufnr number
+function M.QBuf.from_nvim_bufnr(bufnr)
+    local path = vim.api.nvim_buf_get_name(bufnr)
+    local filetype = vim.api.nvim_buf_get_option(bufnr, 'filetype')
+
+    local status, lang = pcall(get_lang, bufnr)
+    local is_loaded = status
+
+    return M.QBuf:new(bufnr, path, filetype, lang, is_loaded)
+end
+
+M.buf_match = {}
+---@class BufMatch
+---@field not_ fun(self): BufMatch
+---@field or_ fun(self, q: BufMatch): BufMatch
+---@field then_ fun(self, q: BufMatch): BufMatch
+---@field filter_on fun(self, q: QNode[]): QNode[]
+M.BufMatch = {}
+
+function M.buf_match.is_loaded()
+    return M.BufMatch.new(function(buf)
+        return buf.is_loaded
+    end)
+end
+
+---@param match_fn fun(buf: QBuf): boolean
+---@return BufMatch
+---NOTE: assigns `match_fn` private field
+function M.BufMatch.new(match_fn)
+    local self = setmetatable({}, M.BufMatch)
+    self.match_fn = match_fn
+    return self
+end
+
+---@vararg string OR for filetypes. It doesn't make a lot of sense for AND filetypes
+---@return BufMatch
+function M.buf_match.filetype(...)
+    local filetypes = { ... }
+    return M.BufMatch.new(function(buf)
+        for _, filetype in ipairs(filetypes) do
+            if buf.filetype == filetype then
+                return true
+            end
+        end
+        return false
+    end)
+end
+
+---@vararg string OR for path
+---@return BufMatch
+function M.buf_match.path(...)
+    local paths = { ... }
+    return M.BufMatch.new(function(buf)
+        for _, path in ipairs(paths) do
+            if string.find(buf.path, path) ~= nil then
+                return true
+            end
+        end
+        return false
+    end)
+end
+
+---@vararg string OR for path
+---@return BufMatch _ f
+function M.buf_match.path_or(...)
+    return M.buf_match.path(...)
+end
+
+---@vararg string AND for path
+---@return BufMatch
+function M.buf_match.path_and(...)
+    local paths = { ... }
+    return M.BufMatch.new(function(buf)
+        for _, path in ipairs(paths) do
+            if string.find(buf.path, path) == nil then
+                return false
+            end
+        end
+        return true
+    end)
+end
+
+---@vararg string
+---@return BufMatch
+function M.buf_match.ext(...)
+    local exts = { ... }
+    return M.BufMatch.new(function(buf)
+        for _, ext in ipairs(exts) do
+            if buf.path:sub(- #ext) == ext then
+                return true
+            end
+        end
+        return false
+    end)
+end
+
+---@param q BufMatch
+---@return BufMatch
+function M.BufMatch:or_(q)
+    return M.BufMatch.new(function(buf)
+        return self.matched_fn --[[@as MatchPredicate]](buf)
+            or q.matched_fn --[[@as MatchPredicate]](buf)
+    end)
+end
+
+---@param q BufMatch
+---@return BufMatch
+function M.BufMatch:then_(q)
+    return M.BufMatch.new(function(buf)
+        return self.matched_fn --[[@as MatchPredicate]](buf)
+            and q.matched_fn --[[@as MatchPredicate]](buf)
+    end)
+end
+
+---@return BufMatch
+function M.BufMatch:not_()
+    return M.BufMatch.new(function(buf)
+        return not self.matched_fn --[[@as MatchPredicate]](buf)
+    end)
+end
+
+---@param itr QBuf[]
+---@return QBuf[]
+function M.BufMatch:filter_on(itr)
+    ---@type QBuf[]
+    local matched = {}
+    for _, buf in ipairs(itr) do
+        if (self.match_fn --[[@as MatchPredicate]])(buf) then
+            table.insert(matched, buf)
+        end
+    end
+    return matched
+end
+
+---@return number[] bufnrs that can be loaded or not loaded
+local function list_bufs()
+    return vim.api.nvim_list_bufs()
+end
+
+---@return QBuf[]
+function M.nvim_get_qbufs()
+    local bufnrs = list_bufs()
+    local qbufs = {}
+
+    for _, bufnr in ipairs(bufnrs) do
+        local path = vim.api.nvim_buf_get_name(bufnr)
+        local filetype = vim.api.nvim_buf_get_option(bufnr, 'filetype')
+
+        local status, lang = pcall(get_lang, bufnr)
+        local is_loaded = status
+
+        local qbuf = {
+            bufnr = bufnr,
+            path = path,
+            filetype = filetype,
+            lang = lang,
+            is_loaded = is_loaded
+        }
+
+        table.insert(qbufs, qbuf)
+    end
+
+    return qbufs
+end
+
+return M
diff --git a/lua/tsql/sink.lua b/lua/tsql/sink.lua
new file mode 100644
index 0000000..0d85397
--- /dev/null
+++ b/lua/tsql/sink.lua
@@ -0,0 +1,15 @@
+local M = {}
+
+---@class Sink
+M.Sink = {}
+
+function M.print()
+end
+
+function M.highlight()
+end
+
+function M.mutate()
+end
+
+return M
diff --git a/lua/tsql/token_select.lua b/lua/tsql/token_select.lua
new file mode 100644
index 0000000..9df137d
--- /dev/null
+++ b/lua/tsql/token_select.lua
@@ -0,0 +1,24 @@
+local M = {}
+
+---@class FileLoc
+---@field 
+M.FileLoc = {
+}
+
+---@class QNode
+M.QNode = {}
+
+---@class TSQuery
+---@field find_nodes fun(self: TSQuery, bufs: QBuf[]): TSNode[]
+M.TSQuery = {}
+
+---@param treesitter_q string Treesitter DSL for query
+---TODO: some examples of `treesitter_q` here
+---
+---@return TSQuery
+function M.from_ts_scm(treesitter_q)
+    
+end
+
+return M
+
diff --git a/plugin/tsql.lua b/plugin/tsql.lua
new file mode 100644
index 0000000..e69de29
diff --git a/selene.toml b/selene.toml
new file mode 100644
index 0000000..6540d6f
--- /dev/null
+++ b/selene.toml
@@ -0,0 +1 @@
+std="lua51+vim"
diff --git a/stylua.toml b/stylua.toml
new file mode 100644
index 0000000..0f90030
--- /dev/null
+++ b/stylua.toml
@@ -0,0 +1,3 @@
+indent_type = "Spaces"
+indent_width = 2
+column_width = 120
diff --git a/vim.toml b/vim.toml
new file mode 100644
index 0000000..0fa5c4f
--- /dev/null
+++ b/vim.toml
@@ -0,0 +1,2 @@
+[vim]
+any = true