diff --git a/lua/core/mappings.lua b/lua/core/mappings.lua
index 7ad5897..a293801 100644
--- a/lua/core/mappings.lua
+++ b/lua/core/mappings.lua
@@ -97,7 +97,7 @@ M.general = { --{{{
         ["<BS>n"] = { "<cmd> set nu!<CR><cmd> set rnu!<CR>", "toggle line number" },
 
         -- option toggle cursor line
-        ["<BS>l"] = { "<cmd> set cul!<CR>", "toggle line number" },
+        ["<BS>l"] = { "<cmd> set cul!<CR>", "toggle cursor line" },
 
         ["<BS>c"] = { "<cmd>cclose<CR><cmd>lclose<CR>", "close quickfix" },
 
@@ -267,9 +267,14 @@ M.general = { --{{{
             return "g@l"
         end, "TS swap left with sibling", opts = { expr = true } },
 
+        -- quickfix
         ["]e"] = { "<cmd> cn <CR>", "quickfix next error" },
         ["[e"] = { "<cmd> cp <CR>", "quickfix previous error" },
 
+        -- loclist
+        ["]l"] = { "<cmd> lne <CR>", "quickfix next error" },
+        ["[l"] = { "<cmd> lp <CR>", "quickfix previous error" },
+
 
         -- Tabularize mappings
         ["<leader>a&"]     = { "<cmd> Tabularize /&<CR>" },
@@ -474,6 +479,9 @@ M.comment = { --{{{
     },
 } --}}}
 
+-- keys relatd to lsp, to be loaded inside `on_attach`. these are generic lsp
+-- keys, refer to navigator's config for the rest.
+-- see ../custom/plugins/configs/navigator.lua
 M.lspconfig = { --{{{
     plugin = true,
 
@@ -508,13 +516,6 @@ M.lspconfig = { --{{{
             "lsp implementation",
         },
 
-        ["<leader>ls"] = {
-            function()
-                vim.lsp.buf.signature_help()
-            end,
-            "lsp signature_help",
-        },
-
         ["<leader>D"] = {
             function()
                 vim.lsp.buf.type_definition()
@@ -522,83 +523,24 @@ M.lspconfig = { --{{{
             "lsp definition type",
         },
 
-        ["<leader>ra"] = {
-            function()
-                require("nvchad_ui.renamer").open()
-            end,
-            "lsp rename",
-        },
-
-        ["<leader>ca"] = {
-            function()
-                vim.lsp.buf.code_action()
-            end,
-            "lsp code_action",
-        },
-
-        ["gr"] = {
-            function()
-                vim.lsp.buf.references()
-            end,
-            "lsp references",
-        },
-
-        ["<leader>f"] = {
-            function()
-                vim.diagnostic.open_float()
-            end,
-            "lsp floating diagnostic",
-        },
-
-        ["[d"] = {
-            function()
-                vim.diagnostic.goto_prev()
-            end,
-            "lsp goto prev",
-        },
-
-        ["d]"] = {
-            function()
-                vim.diagnostic.goto_next()
-            end,
-            "lsp goto_next",
-        },
 
-        ["<leader>q"] = {
-            function()
-                vim.diagnostic.setloclist()
-            end,
-            "lsp diagnostic setloclist",
-        },
+        ["[d"] = { vim.diagnostic.goto_prev , "lsp goto prev" },
 
-        ["<leader>fm"] = {
-            function()
-                vim.lsp.buf.formatting {}
-            end,
-            "lsp formatting",
+        ["]d"] = { vim.diagnostic.goto_next, "lsp goto_next",
         },
 
-        ["<leader>wa"] = {
-            function()
-                vim.lsp.buf.add_workspace_folder()
-            end,
-            "lsp add workspace folder",
-        },
+        [']O'] = { vim.diagnostic.setloclist, "lsp diagnostic setloclist" },
 
-        ["<leader>wr"] = {
-            function()
-                vim.lsp.buf.remove_workspace_folder()
-            end,
-            "lsp remove workspace folder",
-        },
+        ["<space>fm"] = { vim.lsp.buf.format, "lsp formatting" },
+        ['<leader>gi'] = { vim.lsp.buf.incoming_calls, 'lsp incoming_calls' },
+        ['<leader>go'] = { vim.lsp.buf.outgoing_calls, 'lsp outgoing_calls' },
+        ['<C-LeftMouse>'] = { vim.lsp.buf.definition, 'lsp definition' },
+        ['g<LeftMouse>'] = { vim.lsp.buf.implementation, 'lsp implementation' },
 
-        ["<leader>wl"] = {
-            function()
-                print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
-            end,
-            "lsp list workspace folders",
-        },
     },
+    i = {
+        ['<M-i>'] = {  vim.lsp.buf.signature_help, 'lsp signature help' },
+    }
 } --}}}
 
 M.dap = { -- {{{
@@ -1138,4 +1080,5 @@ M.null_ls = {
     }
 }
 
+
 return M
diff --git a/lua/custom/plugins/configs/navigator.lua b/lua/custom/plugins/configs/navigator.lua
index 1460af1..4b8f2f4 100644
--- a/lua/custom/plugins/configs/navigator.lua
+++ b/lua/custom/plugins/configs/navigator.lua
@@ -11,28 +11,41 @@ local config = {
   transparency = 5,
   lsp_signature_help = false, -- needs plugin lsp_signature 
   default_mapping = false,
+  on_attach = require('plugins.configs.lspconfig').on_attach,
   keymaps = {
     { key = 'gr', func = require('navigator.reference').async_ref, desc = 'lsp async_ref' },
     -- { key = '<Leader>gr', func = require('navigator.reference').reference, desc = 'lsp reference' }, -- reference deprecated
-    {
-      key = '<M-i>',
-      mode = 'i',
-      func = vim.lsp.buf.signature_help,
-      desc = 'lsp signature_help'
-    },
     -- { key = '<C-i>', func = vim.lsp.buf.signature_help, desc = 'lsp signature_help' },
     { key = 'g0', func = require('navigator.symbols').document_symbols, desc = 'lsp document_symbols' },
     { key = 'gW', func = require('navigator.workspace').workspace_symbol_live, desc = 'lsp workspace_symbol_live' },
     { key = '<c-]>', func = require('navigator.definition').definition, desc = 'lsp definition' },
     { key = 'gd', func = require('navigator.definition').definition, desc = 'lsp definition' },
-    { key = 'gD', func = vim.lsp.buf.declaration, desc = 'lsp declaration' },
     { key = 'gp', func = require('navigator.definition').definition_preview, desc = 'lsp definition_preview' },
     -- handled by main mappings
     -- { key = '<Leader>gt', func = require('navigator.treesitter').buf_ts, desc = 'lsp buf_ts' },
     -- { key = '<Leader>gT', func = require('navigator.treesitter').bufs_ts, desc = 'lsp bufs_ts' },
     -- { key = '<Leader>ct', func = require('navigator.ctags').ctags, desc = 'lsp ctags' },
 
-    { key = 'K', func = vim.lsp.buf.hover, desc = 'lsp hover' },
+    -- handled by main mappings (lspconfig section)
+    -- { key = 'gD', func = vim.lsp.buf.declaration, desc = 'lsp declaration' },
+    -- {
+    --   key = '<M-i>',
+    --   mode = 'i',
+    --   func = vim.lsp.buf.signature_help,
+    --   desc = 'lsp signature_help'
+    -- },
+    -- { key = 'K', func = vim.lsp.buf.hover, desc = 'lsp hover' },
+    -- { key = '<Leader>gm', func = vim.lsp.buf.implementation, desc = 'lsp implementation' },
+    -- { key = '<Space>D', func = vim.lsp.buf.type_definition, desc = 'lsp type_definition' },
+    -- { key = ']d', func = vim.diagnostic.goto_next, desc = 'lsp next diagnostics' },
+    -- { key = '[d', func = vim.diagnostic.goto_prev, desc = 'lsp prev diagnostics' },
+    -- { key = ']O', func = vim.diagnostic.setloclist, desc = 'lsp diagnostics set loclist' },
+    -- { key = '<space>fm', func = vim.lsp.buf.format, mode = 'n', desc = 'lsp format' },
+    -- { key = '<Leader>gi', func = vim.lsp.buf.incoming_calls, desc = 'lsp incoming_calls' },
+    -- { key = '<Leader>go', func = vim.lsp.buf.outgoing_calls, desc = 'lsp outgoing_calls' },
+    -- { key = '<C-LeftMouse>', func = vim.lsp.buf.definition, desc = 'lsp definition' },
+    -- { key = 'g<LeftMouse>', func = vim.lsp.buf.implementation, desc = 'lsp implementation' },
+
     { key = '<M-a>', mode = 'n', func = require('navigator.codeAction').code_action, desc = 'lsp code_action' },
     { key = '<M-a>', mode = 'i', func = require('navigator.codeAction').code_action, desc = 'lsp code_action' },
     { key = '<BS><Right>', mode = 'n', func = require('navigator.symbols').side_panel, desc = 'toggle lsp outline pannel'},
@@ -44,21 +57,12 @@ local config = {
     },
     -- { key = '<Leader>re', func = 'rename()' },
     { key = '<Space>rn', func = require('navigator.rename').rename, desc = 'lsp rename' },
-    { key = '<Leader>gi', func = vim.lsp.buf.incoming_calls, desc = 'lsp incoming_calls' },
-    { key = '<Leader>go', func = vim.lsp.buf.outgoing_calls, desc = 'lsp outgoing_calls' },
-    { key = '<Leader>gm', func = vim.lsp.buf.implementation, desc = 'lsp implementation' },
-    { key = '<Space>D', func = vim.lsp.buf.type_definition, desc = 'lsp type_definition' },
     { key = 'gL', func = require('navigator.diagnostics').show_diagnostics, desc = 'lsp show_diagnostics' },
     { key = 'gG', func = require('navigator.diagnostics').show_buf_diagnostics, desc = 'lsp show_buf_diagnostics' },
     -- { key = '<Leader>dt', func = require('navigator.diagnostics').toggle_diagnostics, desc = 'lsp toggle_diagnostics' },
     -- { key = '<Leader>td', func = require('spike.diagnostics').toggle, desc = 'lsp toggle_diagnostics' },
-    { key = ']d', func = vim.diagnostic.goto_next, desc = 'lsp next diagnostics' },
-    { key = '[d', func = vim.diagnostic.goto_prev, desc = 'lsp prev diagnostics' },
-    { key = ']O', func = vim.diagnostic.set_loclist, desc = 'lsp diagnostics set loclist' },
     { key = ']r', func = require('navigator.treesitter').goto_next_usage, desc = 'lsp goto_next_usage' },
     { key = '[r', func = require('navigator.treesitter').goto_previous_usage, desc = 'lsp goto_previous_usage' },
-    { key = '<C-LeftMouse>', func = vim.lsp.buf.definition, desc = 'lsp definition' },
-    { key = 'g<LeftMouse>', func = vim.lsp.buf.implementation, desc = 'lsp implementation' },
     { key = '<Leader>k', func = require('navigator.dochighlight').hi_symbol, desc = 'lsp hi_symbol' },
     { key = '<leader>wa', func = require('navigator.workspace').add_workspace_folder, desc = 'lsp add_workspace_folder' },
     {
@@ -66,7 +70,6 @@ local config = {
       func = require('navigator.workspace').remove_workspace_folder,
       desc = 'lsp lsp remove_workspace_folder',
     },
-    { key = '<space>fm', func = vim.lsp.buf.format, mode = 'n', desc = 'lsp format' },
     -- { key = '<Space>ff', func = vim.lsp.buf.range_formatting, mode = 'v', desc = 'lsp range format' },
     -- DEPRECATED 
     -- {
@@ -176,7 +179,7 @@ local config = {
             pylsp = {
                 plugins = {
                     autopep8 = { enabled = false },
-                    -- pylint = { enabled = false },
+                    -- pylint = { enabled = false }, -- disabled in null-ls
                     flake8 = { enabled = false },
                     pycodestyle= { enabled = false},
                     pyflakes = { enabled = false },
diff --git a/lua/custom/plugins/configs/null-ls.lua b/lua/custom/plugins/configs/null-ls.lua
index 0792727..fc50cdd 100644
--- a/lua/custom/plugins/configs/null-ls.lua
+++ b/lua/custom/plugins/configs/null-ls.lua
@@ -24,11 +24,13 @@ M.config = {
 
         null_ls.builtins.formatting.autoflake,
         null_ls.builtins.formatting.autopep8,
+        null_ls.builtins.formatting.black,
 
         -- golang revive (manually enabled with shortcut from mappings)
         -- null_ls.builtins.diagnostics.revive,
     },
     on_attach = function(client, bufnr)
+        require('plugins.configs.lspconfig').on_attach(client, bufnr)
         local util = require('navigator.util')
         local log = util.log
         local trace = util.trace
diff --git a/lua/plugins/configs/lspconfig.lua b/lua/plugins/configs/lspconfig.lua
index 4358142..9f305cb 100644
--- a/lua/plugins/configs/lspconfig.lua
+++ b/lua/plugins/configs/lspconfig.lua
@@ -20,6 +20,11 @@ function M.setup()
 
 end
 
+-- my custom on_attach to inject in other lsp clients
+M.on_attach = function(client, bufnr)
+    require('core.utils').load_mappings 'lspconfig'
+end
+
 
 -- local utils = require "core.utils"
 --