diff --git a/.editorconfig b/.editorconfig
index 14e6228..713e73f 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -9,7 +9,7 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 
 [*.fish]
-max_line_length = 80
+max_line_length = 120
 
 [*.md]
 max_line_length = 120
@@ -49,3 +49,6 @@ ignore = true
 [plan]
 trim_trailing_whitespace = false
 max_line_length = off
+
+[base/hammerspoon/hammerspoon.types.lua]
+max_line_length = off
diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index cc7d003..0000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "extends": ["@ivuorinen"]
-}
diff --git a/.github/tag-changelog-config.js b/.github/tag-changelog-config.js
index bec587c..0dea471 100644
--- a/.github/tag-changelog-config.js
+++ b/.github/tag-changelog-config.js
@@ -16,10 +16,10 @@ module.exports = {
 
   excludeTypes: [],
 
-  renderTypeSection: function (label, commits) {
+  renderTypeSection: (label, commits) => {
     let text = `\n## ${label}\n\n`
 
-    commits.forEach(commit => {
+    commits.forEach((commit) => {
       const scope = commit.scope ? `**${commit.scope}:** ` : ''
       text += `- ${scope}${commit.subject}\n`
     })
@@ -27,10 +27,10 @@ module.exports = {
     return text
   },
 
-  renderChangelog: function (release, changes) {
+  renderChangelog: (release, changes) => {
     const now = new Date()
     const d = now.toISOString().substring(0, 10)
     const header = `# ${release} - ${d}\n`
-    return header + changes + '\n\n'
+    return `${header}${changes}\n\n`
   },
 }
diff --git a/.markdownlint.json b/.markdownlint.json
deleted file mode 100644
index 729aa6c..0000000
--- a/.markdownlint.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "extends": "@ivuorinen/markdownlint-config",
-  "code-block-style": {
-    "style": "fenced"
-  },
-  "code-fence-style": {
-    "style": "backtick"
-  },
-  "heading-style": {
-    "style": "atx"
-  },
-  "no-duplicate-heading": {
-    "siblings_only": true
-  },
-  "required-headings": false,
-  "ul-style": {
-    "style": "dash"
-  }
-}
diff --git a/.mega-linter.yml b/.mega-linter.yml
index bb55758..44c5dbf 100644
--- a/.mega-linter.yml
+++ b/.mega-linter.yml
@@ -16,12 +16,9 @@ SHOW_SKIPPED_LINTERS: false # Show skipped linters in MegaLinter log
 TYPESCRIPT_DEFAULT_STYLE: prettier # Default style for TypeScript
 DISABLE_LINTERS:
   - REPOSITORY_DEVSKIM
-  - JAVASCRIPT_ES
+  - JAVASCRIPT_ES # using biome
+  - JAVASCRIPT_PRETTIER # using biome
 YAML_YAMLLINT_CONFIG_FILE: .yamllint.yml
-MARKDOWN_MARKDOWNLINT_CONFIG_FILE: .markdownlint.json
-JAVASCRIPT_ES_CONFIG_FILE: .eslintrc.json
-TYPESCRIPT_ES_CONFIG_FILE: .eslintrc.json
 REPOSITORY_GIT_DIFF_DISABLE_ERRORS: true
 FILTER_REGEX_EXCLUDE: >
   (node_modules|tools|config/cheat/cheatsheets/community|config/cheat/cheatsheets/tldr|config/fzf|config/zsh|config/tmux/plugins)
-
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bf3fd09..94e549b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -20,22 +20,22 @@ repos:
       - id: end-of-file-fixer
       - id: mixed-line-ending
         args: [--fix=auto]
-      - id: pretty-format-json
-        args: [--autofix, --no-sort-keys]
 
-  - repo: https://github.com/igorshubovych/markdownlint-cli
-    rev: v0.47.0
+  - repo: local
     hooks:
-      - id: markdownlint
-        args: [-c, .markdownlint.json, --fix]
+      - id: biome-check
+        name: Biome Check
+        entry: yarn biome check --write --files-ignore-unknown=true --no-errors-on-unmatched
+        language: system
+        files: \.(js|ts|jsx|tsx|json|md)$
 
   - repo: https://github.com/adrienverge/yamllint
     rev: v1.37.1
     hooks:
       - id: yamllint
 
-  - repo: https://github.com/koalaman/shellcheck-precommit
-    rev: v0.11.0
+  - repo: https://github.com/shellcheck-py/shellcheck-py
+    rev: v0.11.0.1
     hooks:
       - id: shellcheck
 
@@ -49,15 +49,11 @@ repos:
     hooks:
       - id: actionlint
 
-  - repo: https://github.com/renovatebot/pre-commit-hooks
-    rev: 42.52.8
-    hooks:
-      - id: renovate-config-validator
-
   - repo: https://github.com/JohnnyMorganz/StyLua
     rev: v2.3.1
     hooks:
       - id: stylua # or stylua-system / stylua-github
+        exclude: hammerspoon\.types\.lua$
 
   - repo: https://github.com/hugoh/pre-commit-fish.git
     rev: v1.2
diff --git a/.prettierignore b/.prettierignore
deleted file mode 100644
index 570308b..0000000
--- a/.prettierignore
+++ /dev/null
@@ -1,16 +0,0 @@
-# vim: ft=gitignore
-.mypy_cache/*
-Brewfile.lock.json
-base/plan
-config/cheat/cheatsheets/community
-config/cheat/cheatsheets/tldr
-config/fzf/*
-config/nvim/*
-config/op/plugins/used_plugins/*
-config/tmux/plugins/*
-config/zsh/*
-lazy-lock.json
-local/bin/antigen.zsh
-local/bin/asdf
-tools/antidote/*
-tools/dotbot*
diff --git a/.prettierrc.js b/.prettierrc.js
deleted file mode 100644
index cce301e..0000000
--- a/.prettierrc.js
+++ /dev/null
@@ -1,15 +0,0 @@
-module.exports = {
-  ...require('@ivuorinen/prettier-config'),
-  trailingComma: 'all',
-  // Add custom options below:
-  overrides: [
-    {
-      files: '*.md',
-      options: {
-        printWidth: 120,
-        proseWrap: 'preserve',
-        tabWidth: 2,
-      },
-    },
-  ],
-}
diff --git a/.sonarlint/connectedMode.json b/.sonarlint/connectedMode.json
new file mode 100644
index 0000000..5a8cdf8
--- /dev/null
+++ b/.sonarlint/connectedMode.json
@@ -0,0 +1,5 @@
+{
+  "sonarCloudOrganization": "ivuorinen",
+  "projectKey": "ivuorinen_dotfiles",
+  "region": "EU"
+}
diff --git a/base/hammerspoon/hammerspoon.types.lua b/base/hammerspoon/hammerspoon.types.lua
index ed2f4c8..0fa4b25 100644
--- a/base/hammerspoon/hammerspoon.types.lua
+++ b/base/hammerspoon/hammerspoon.types.lua
@@ -2673,7 +2673,7 @@ function canvas:delete(fadeOutTime) end
 --- optionally return false to indicate that you do not wish to accept the item being dragged.
 --- "exit"    - the user has moved the item out of the canvas; if the previous "enter" callback returned false, this
 --- message will also occur when the user finally releases the items being dragged.
---- "receive" - indicates that the user has released the dragged object while it is still within the canvas frame. 
+--- "receive" - indicates that the user has released the dragged object while it is still within the canvas frame.
 --- When your callback receives this message, you can optionally return false to indicate to the sending application
 --- that you do not want to accept the dragged item -- this may affect the animations provided by the sending
 --- application.
@@ -2810,7 +2810,7 @@ function canvas:minimumTextSize(index, text) end
 --- element.  The message will be "mouseDown".
 --- trackMouseUp - indicates that a callback should be invoked when a mouse button has been released over the canvas
 --- element.  The message will be "mouseUp".
---- trackMouseEnterExit - indicates that a callback should be invoked when the mouse pointer enters or exits the 
+--- trackMouseEnterExit - indicates that a callback should be invoked when the mouse pointer enters or exits the
 --- canvas element.  The message will be "mouseEnter" or "mouseExit".
 --- trackMouseMove - indicates that a callback should be invoked when the mouse pointer moves within the canvas
 --- element.  The message will be "mouseMove".
@@ -4197,7 +4197,7 @@ hs.drawing.windowLevels = nil
 --- hs.drawing
 --- for text drawing objects.
 ---
---- Note: This method returns the default font, size, color, and paragraphStyle used by hs.drawing for text objects. 
+--- Note: This method returns the default font, size, color, and paragraphStyle used by hs.drawing for text objects.
 --- If you modify a drawing object's defaults with hs.drawing:setColor , hs.drawing:setTextFont , or
 --- hs.drawing:setTextSize , the changes will not be reflected by this function.
 ---@return table
@@ -4662,7 +4662,7 @@ hs.drawing.color.ansiTerminalColors = nil
 ---@type table
 hs.drawing.color.hammerspoon = nil
 
---- A collection of colors representing the X11 color names as defined at 
+--- A collection of colors representing the X11 color names as defined at
 --- https://en.wikipedia.org/wiki/Web_colors#X11_color_names (names in lowercase)
 ---@type any
 hs.drawing.color.x11 = nil
@@ -7022,7 +7022,7 @@ function hs.http.doAsyncRequest(url, method, data, headers, callback, cachePolic
 --- use the asynchronous functions.
 --- If you attempt to connect to a local Hammerspoon server created with hs.httpserver , then Hammerspoon will block
 --- until the connection times out (60 seconds), return a failed result due to the timeout, and then the hs.httpserver
---- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost). 
+--- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost).
 --- Use hs.http.doAsyncRequest to avoid this.
 --- If the Content-Type response header begins text/ then the response body return value is a UTF8 string. Any other
 --- content type passes the response body, unaltered, as a stream of bytes.
@@ -7054,7 +7054,7 @@ function hs.http.encodeForQuery(string) end
 --- are encouraged to use the asynchronous functions
 --- If you attempt to connect to a local Hammerspoon server created with hs.httpserver , then Hammerspoon will block
 --- until the connection times out (60 seconds), return a failed result due to the timeout, and then the hs.httpserver
---- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost). 
+--- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost).
 --- Use hs.http.asyncGet to avoid this.
 ---@param url string
 ---@param headers table|nil
@@ -7072,7 +7072,7 @@ function hs.http.get(url, headers) end
 --- are encouraged to use the asynchronous functions
 --- If you attempt to connect to a local Hammerspoon server created with hs.httpserver , then Hammerspoon will block
 --- until the connection times out (60 seconds), return a failed result due to the timeout, and then the hs.httpserver
---- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost). 
+--- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost).
 --- Use hs.http.asyncPost to avoid this.
 ---@param url string
 ---@param data string|nil
@@ -7091,7 +7091,7 @@ function hs.http.post(url, data, headers) end
 --- are encouraged to use the asynchronous functions
 --- If you attempt to connect to a local Hammerspoon server created with hs.httpserver , then Hammerspoon will block
 --- until the connection times out (60 seconds), return a failed result due to the timeout, and then the hs.httpserver
---- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost). 
+--- callback function will be invoked (so any side effects of the function will occur, but it's results will be lost).
 --- Use hs.http.asyncPost to avoid this.
 ---@param url string
 ---@param data string|nil
@@ -7374,7 +7374,7 @@ function hs.httpserver.hsminweb.new(documentRoot) end
 --- Get or set the access-list table for the hsminweb web server
 ---
 --- Note: The access-list feature works by comparing the request headers against a list of tests which either accept or
---- reject the request.  If no access list is set (i.e. it is assigned a value of nil ), then all requests are served. 
+--- reject the request.  If no access list is set (i.e. it is assigned a value of nil ), then all requests are served.
 --- If a table is passed into this method, then any request which is not explicitly accepted by one of the tests
 --- provided is rejected (i.e. there is an implicit "reject" at the end of the list).
 --- The access-list table is a list of tests which are evaluated in order.  The first test which matches a given
@@ -7919,7 +7919,7 @@ function hs.httpserver.hsminweb.cgilua.urlcode.insertfield(table, key, value) en
 --- Parse the query string and store the key-value pairs in the provided table.
 ---
 --- Note: The specification allows for the same key to be assigned multiple values in an encoded string, but does not
---- specify the behavior; by convention, web servers assign these multiple values to the same key in an array (table). 
+--- specify the behavior; by convention, web servers assign these multiple values to the same key in an array (table).
 --- This function follows that convention.  This is most commonly used by forms which allow selecting multiple options
 --- via check boxes or in a selection list.
 --- This function uses cgilua.urlcode.insertfield to build the key-value table.
@@ -10225,7 +10225,7 @@ function echorequest:seeAllUnexpectedPackets(state) end
 --- Sends a single ICMP Echo Request packet.
 ---
 --- Note: By convention, unless you are trying to test for specific network fragmentation or congestion problems, ICMP
---- Echo Requests are generally 64 bytes in length (this includes the 8 byte header, giving 56 bytes of payload data). 
+--- Echo Requests are generally 64 bytes in length (this includes the 8 byte header, giving 56 bytes of payload data).
 --- If you do not specify a payload, a default payload which will result in a packet size of 64 bytes is constructed.
 ---@param payload string|nil
 ---@return echoRequestObject|boolean|nil
@@ -15169,7 +15169,7 @@ function watcher:stop() end
 ---@class hs.utf8
 hs.utf8 = {}
 
---- A collection of UTF-8 characters already converted from codepoint and available as convenient key-value pairs. 
+--- A collection of UTF-8 characters already converted from codepoint and available as convenient key-value pairs.
 --- UTF-8 printable versions of common Apple and OS X special keys are predefined and others can be added with
 --- hs.utf8.registerCodepoint(label, codepoint)
 --- for your own use.
@@ -15238,7 +15238,7 @@ function hs.utf8.hexDump(inputString, count) end
 --- hs.utf8.registeredKeys[label]
 --- for convenience and readability.
 ---
---- Note: If a codepoint label was previously registered, this will overwrite the previous value with a new one. 
+--- Note: If a codepoint label was previously registered, this will overwrite the previous value with a new one.
 --- Because many of the special keys you may want to register have different variants, this allows you to easily modify
 --- the existing predefined defaults to suite your preferences.
 --- The return value is merely syntactic sugar and you do not need to save it locally; it can be safely ignored --
@@ -15585,13 +15585,13 @@ function hs.webview.newBrowser(rect, preferencesTable, userContentController) en
 ---@return webviewObject
 function webview:allowGestures(value) end
 
---- Get or set whether or not the webview will respond to magnification gestures from a trackpad or magic mouse. 
+--- Get or set whether or not the webview will respond to magnification gestures from a trackpad or magic mouse.
 --- Default is false.
 ---@param value any
 ---@return webviewObject
 function webview:allowMagnificationGestures(value) end
 
---- Get or set whether or not the webview will respond to the navigation gestures from a trackpad or magic mouse. 
+--- Get or set whether or not the webview will respond to the navigation gestures from a trackpad or magic mouse.
 --- Default is false.
 ---@param value any
 ---@return webviewObject
@@ -16455,7 +16455,7 @@ function usercontent:removeAllScripts() end
 --- } catch(err) {
 --- console.log('The controller does not exist yet');
 --- }
---- Where name matches the name specified in the constructor and message-object is the object to post to the function. 
+--- Where name matches the name specified in the constructor and message-object is the object to post to the function.
 --- This object can be a number, string, date, array, dictionary(table), or nil.
 ---@param fn function
 ---@return usercontentControllerObject
@@ -17860,4 +17860,4 @@ hs.window.tiling = {}
 ---@param preserveRelativeArea? any
 ---@param animationDuration? hs.window.animationDuration|nil
 ---@return any
-function hs.window.tiling.tileWindows(windows, rect, desiredAspect, processInOrder, preserveRelativeArea, animationDuration) end
\ No newline at end of file
+function hs.window.tiling.tileWindows(windows, rect, desiredAspect, processInOrder, preserveRelativeArea, animationDuration) end
diff --git a/base/hammerspoon/init.lua b/base/hammerspoon/init.lua
index 620b767..2453055 100644
--- a/base/hammerspoon/init.lua
+++ b/base/hammerspoon/init.lua
@@ -193,11 +193,12 @@ end)
 
 -- Paste 1Password secret with Meh + P
 f18:bind({}, 'p', function()
-  local output, status = hs.execute('op read "op://Svea/3hzhctmvovbwlgulv7mgy25rf4/login-input"', true)
+  local output, status =
+    hs.execute('op read "op://Svea/3hzhctmvovbwlgulv7mgy25rf4/login-input"', true)
   if status then
     hs.eventtap.keyStrokes(output:gsub('%s+$', '')) -- trim trailing whitespace
   else
-    hs.alert.show('1Password CLI error')
+    hs.alert.show '1Password CLI error'
   end
 end)
 
diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..9a5dc5c
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,103 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.3.1/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true,
+    "defaultBranch": "main"
+  },
+  "files": {
+    "ignoreUnknown": true,
+    "includes": [
+      "**",
+      "!!**/.mypy_cache",
+      "!!**/Brewfile.lock.json",
+      "!!**/base/plan",
+      "!!**/config/cheat/cheatsheets/community",
+      "!!**/config/cheat/cheatsheets/tldr",
+      "!!**/config/fzf",
+      "!!**/config/nvim",
+      "!!**/config/op/plugins/used_plugins",
+      "!!**/config/tmux/plugins",
+      "!!**/config/zsh",
+      "!!**/config/vim",
+      "!!**/lazy-lock.json",
+      "!!**/local/bin/antigen.zsh",
+      "!!**/local/bin/asdf",
+      "!!**/tools/antidote",
+      "!!**/tools/dotbot",
+      "!!**/node_modules"
+    ]
+  },
+  "formatter": {
+    "enabled": true,
+    "formatWithErrors": false,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineEnding": "lf",
+    "lineWidth": 80
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "correctness": {
+        "noUnusedVariables": "warn",
+        "noUnusedImports": "warn"
+      },
+      "style": {
+        "useConst": "warn",
+        "useTemplate": "warn"
+      },
+      "suspicious": {
+        "noExplicitAny": "warn",
+        "noConsole": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "enabled": true,
+      "quoteStyle": "single",
+      "jsxQuoteStyle": "double",
+      "trailingCommas": "all",
+      "semicolons": "asNeeded",
+      "arrowParentheses": "always",
+      "bracketSpacing": true,
+      "bracketSameLine": false,
+      "quoteProperties": "asNeeded",
+      "indentStyle": "space",
+      "indentWidth": 2
+    }
+  },
+  "json": {
+    "parser": {
+      "allowComments": true,
+      "allowTrailingCommas": false
+    },
+    "formatter": {
+      "enabled": true,
+      "indentStyle": "space",
+      "indentWidth": 2,
+      "lineWidth": 80
+    }
+  },
+  "overrides": [
+    {
+      "includes": ["*.md", "*.mdx"],
+      "formatter": {
+        "enabled": true,
+        "lineWidth": 120
+      }
+    },
+    {
+      "includes": ["package.json"],
+      "json": {
+        "formatter": {
+          "enabled": true,
+          "indentWidth": 2
+        }
+      }
+    }
+  ]
+}
diff --git a/config/amethyst/layouts/almost-maximize.js b/config/amethyst/layouts/almost-maximize.js
index dcb3673..00b0d34 100644
--- a/config/amethyst/layouts/almost-maximize.js
+++ b/config/amethyst/layouts/almost-maximize.js
@@ -6,21 +6,19 @@
  *
  * @param {Object} windows - All windows in the current space.
  * @param {Object} screenFrame - The frame of the current screen.
- * @param {Object} state - The state of the current space.
- * @param {Object} extendedFrames - The frames of the windows in the current space.
  * @return {Object} - The frames for the windows in the current space.
  */
 function layout() {
   return {
     name: 'Almost Maximize',
-    getFrameAssignments: (windows, screenFrame, state, extendedFrames) => {
+    getFrameAssignments: (windows, screenFrame) => {
       const width = screenFrame.width * 0.95
       const height = screenFrame.height * 0.95
       const x = (screenFrame.width - width) / 2
       const y = (screenFrame.height - height) / 2
       const windowFrames = {}
 
-      windows.forEach(window => {
+      windows.forEach((window) => {
         windowFrames[window.id] = {
           Y: screenFrame.y + y,
           x: screenFrame.x + x,
@@ -33,3 +31,5 @@ function layout() {
     },
   }
 }
+
+module.exports = layout()
diff --git a/config/exports-secret.example b/config/exports-secret.example
index 7abaec6..c581576 100644
--- a/config/exports-secret.example
+++ b/config/exports-secret.example
@@ -1,5 +1,3 @@
-#!/usr/bin/env bash
-#
 # This file is secret and wont be added to the git repo.
 
 export GITLAB_API_TOKEN=""
diff --git a/config/fish/completions/docker.fish b/config/fish/completions/docker.fish
old mode 100755
new mode 100644
diff --git a/config/fish/config.fish b/config/fish/config.fish
index c30882b..02e341d 100644
--- a/config/fish/config.fish
+++ b/config/fish/config.fish
@@ -26,7 +26,7 @@ if status is-interactive
     # type -q fnm; and fnm env --use-on-cd --shell fish | source
     type -q load_nvm; and load_nvm >/dev/stderr
 
-    # Intialize other tools if available
+    # Initialize other tools if available
     type -q zoxide; and zoxide init fish | source
 
     # Start tmux if not already running and not in SSH
@@ -40,7 +40,7 @@ set -gx PATH $PATH $HOME/.lmstudio/bin
 # vim: ft=fish ts=4 sw=4 et:
 
 # opencode
-fish_add_path /Users/ivuorinen/.opencode/bin
+fish_add_path $HOME/.opencode/bin
 
 # Added by OrbStack: command-line tools and integration
 # This won't be added again if you remove it.
diff --git a/config/fish/exports.fish b/config/fish/exports.fish
index ce80e88..40d3c61 100644
--- a/config/fish/exports.fish
+++ b/config/fish/exports.fish
@@ -1,5 +1,3 @@
-#!/usr/bin/env fish
-
 # XDG Base Directory Specification
 set -q XDG_CONFIG_HOME; or set -x XDG_CONFIG_HOME "$HOME/.config"
 set -q XDG_DATA_HOME; or set -x XDG_DATA_HOME "$HOME/.local/share"
diff --git a/config/fish/functions/__macos_app_icon.fish b/config/fish/functions/__macos_app_icon.fish
index b5c2249..3a5fd19 100644
--- a/config/fish/functions/__macos_app_icon.fish
+++ b/config/fish/functions/__macos_app_icon.fish
@@ -26,7 +26,6 @@ Options:
         return 1
     end
 
-
     if set --query _flag_exact
         set --function apps (__macos_app_find --exact $argv)
         or return 1
diff --git a/config/fish/functions/__macos_mac_touchid_sudo.fish b/config/fish/functions/__macos_mac_touchid_sudo.fish
index e503649..a7c7e06 100644
--- a/config/fish/functions/__macos_mac_touchid_sudo.fish
+++ b/config/fish/functions/__macos_mac_touchid_sudo.fish
@@ -139,7 +139,6 @@ Options:
         return 0
     end
 
-
     __macos_mac_touchid_sudo::check_supported
     or return
 
diff --git a/config/fish/functions/__ssh_agent_is_started.fish b/config/fish/functions/__ssh_agent_is_started.fish
index a9da28a..4318c25 100644
--- a/config/fish/functions/__ssh_agent_is_started.fish
+++ b/config/fish/functions/__ssh_agent_is_started.fish
@@ -1,23 +1,25 @@
 function __ssh_agent_is_started -d "check if ssh agent is already started"
-	if test -n "$SSH_CONNECTION"
-		# This is an SSH session
-		ssh-add -l > /dev/null 2>&1
-		if test $status -eq 0 -o $status -eq 1
-			# An SSH agent was forwarded
-			return 0
-		end
-	end
+    if test -n "$SSH_CONNECTION"
+        # This is an SSH session
+        ssh-add -l >/dev/null 2>&1
+        if test $status -eq 0 -o $status -eq 1
+            # An SSH agent was forwarded
+            return 0
+        end
+    end
 
-	if begin; test -f "$SSH_ENV"; and test -z "$SSH_AGENT_PID"; end
-		source $SSH_ENV > /dev/null
-	end
+    if begin
+            test -f "$SSH_ENV"; and test -z "$SSH_AGENT_PID"
+        end
+        source $SSH_ENV >/dev/null
+    end
 
-	if test -z "$SSH_AGENT_PID"
-		return 1
-	end
+    if test -z "$SSH_AGENT_PID"
+        return 1
+    end
 
-	ssh-add -l > /dev/null 2>&1
-	if test $status -eq 2
-		return 1
-	end
+    ssh-add -l >/dev/null 2>&1
+    if test $status -eq 2
+        return 1
+    end
 end
diff --git a/config/fish/functions/__ssh_agent_start.fish b/config/fish/functions/__ssh_agent_start.fish
index 3766fe4..c7ae4b3 100644
--- a/config/fish/functions/__ssh_agent_start.fish
+++ b/config/fish/functions/__ssh_agent_start.fish
@@ -1,5 +1,5 @@
 function __ssh_agent_start -d "start a new ssh agent"
-  ssh-agent -c | sed 's/^echo/#echo/' > $SSH_ENV
-  chmod 600 $SSH_ENV
-  source $SSH_ENV > /dev/null
+    ssh-agent -c | sed 's/^echo/#echo/' >$SSH_ENV
+    chmod 600 $SSH_ENV
+    source $SSH_ENV >/dev/null
 end
diff --git a/config/fish/functions/_fzf_extract_var_info.fish b/config/fish/functions/_fzf_extract_var_info.fish
index dd4e952..34a4b44 100644
--- a/config/fish/functions/_fzf_extract_var_info.fish
+++ b/config/fish/functions/_fzf_extract_var_info.fish
@@ -3,10 +3,8 @@ function _fzf_extract_var_info --argument-names variable_name set_show_output --
     # Extract only the lines about the variable, all of which begin with either
     # $variable_name: ...or... $variable_name[
     string match --regex "^\\\$$variable_name(?::|\[).*" <$set_show_output |
-
         # Strip the variable name prefix, including ": " for scope info lines
         string replace --regex "^\\\$$variable_name(?:: )?" '' |
-
         # Distill the lines of values, replacing...
         #   [1]: |value|
         # ...with...
diff --git a/config/fish/functions/_fzf_search_directory.fish b/config/fish/functions/_fzf_search_directory.fish
index 4541eec..b00c34a 100644
--- a/config/fish/functions/_fzf_search_directory.fish
+++ b/config/fish/functions/_fzf_search_directory.fish
@@ -24,7 +24,6 @@ function _fzf_search_directory --description "Search the current directory. Repl
         set -f file_paths_selected ($fd_cmd 2>/dev/null | _fzf_wrapper $fzf_arguments)
     end
 
-
     if test $status -eq 0
         commandline --current-token --replace -- (string escape -- $file_paths_selected | string join ' ')
     end
diff --git a/config/fish/functions/_puffer_fish_expand_bang.fish b/config/fish/functions/_puffer_fish_expand_bang.fish
index 6fb9dfb..193beae 100644
--- a/config/fish/functions/_puffer_fish_expand_bang.fish
+++ b/config/fish/functions/_puffer_fish_expand_bang.fish
@@ -1,8 +1,8 @@
 function _puffer_fish_expand_bang
     switch (commandline -t)
-      case '!'
-        commandline -t $history[1]
-      case '*'
-        commandline -i '!'
+        case '!'
+            commandline -t $history[1]
+        case '*'
+            commandline -i '!'
     end
 end
diff --git a/config/fish/functions/_puffer_fish_expand_lastarg.fish b/config/fish/functions/_puffer_fish_expand_lastarg.fish
index a61b892..4f9c87d 100644
--- a/config/fish/functions/_puffer_fish_expand_lastarg.fish
+++ b/config/fish/functions/_puffer_fish_expand_lastarg.fish
@@ -1,9 +1,9 @@
 function _puffer_fish_expand_lastarg
     switch (commandline -t)
-      case '!'
-        commandline -t ""
-        commandline -f history-token-search-backward
-      case '*'
-        commandline -i '$'
+        case '!'
+            commandline -t ""
+            commandline -f history-token-search-backward
+        case '*'
+            commandline -i '$'
     end
 end
diff --git a/config/fish/functions/_sponge_clear_state.fish b/config/fish/functions/_sponge_clear_state.fish
index c6a07da..b1f972c 100644
--- a/config/fish/functions/_sponge_clear_state.fish
+++ b/config/fish/functions/_sponge_clear_state.fish
@@ -1,5 +1,5 @@
 function _sponge_clear_state
-  set --erase --global _sponge_current_command
-  set --erase --global _sponge_current_command_exit_code
-  set --erase --global _sponge_current_command_previously_in_history
+    set --erase --global _sponge_current_command
+    set --erase --global _sponge_current_command_exit_code
+    set --erase --global _sponge_current_command_previously_in_history
 end
diff --git a/config/fish/functions/_sponge_on_exit.fish b/config/fish/functions/_sponge_on_exit.fish
index 0c6cc19..30237fd 100644
--- a/config/fish/functions/_sponge_on_exit.fish
+++ b/config/fish/functions/_sponge_on_exit.fish
@@ -1,3 +1,3 @@
 function _sponge_on_exit --on-event fish_exit
-  sponge_delay=0 _sponge_remove_from_history
+    sponge_delay=0 _sponge_remove_from_history
 end
diff --git a/config/fish/functions/_sponge_on_postexec.fish b/config/fish/functions/_sponge_on_postexec.fish
index 1d67935..b208c31 100644
--- a/config/fish/functions/_sponge_on_postexec.fish
+++ b/config/fish/functions/_sponge_on_postexec.fish
@@ -1,24 +1,24 @@
 function _sponge_on_postexec --on-event fish_postexec
-  set --global _sponge_current_command_exit_code $status
+    set --global _sponge_current_command_exit_code $status
 
-  # Remove command from the queue if it's been added previously
-  if set --local index (contains --index -- $_sponge_current_command $_sponge_queue)
-    set --erase _sponge_queue[$index]
-  end
-
-  # Ignore empty commands
-  if test -n $_sponge_current_command
-    set --local command ''
-    # Run filters
-    for filter in $sponge_filters
-      if $filter \
-          $_sponge_current_command \
-          $_sponge_current_command_exit_code \
-          $_sponge_current_command_previously_in_history
-        set command $_sponge_current_command
-        break
-      end
+    # Remove command from the queue if it's been added previously
+    if set --local index (contains --index -- $_sponge_current_command $_sponge_queue)
+        set --erase _sponge_queue[$index]
+    end
+
+    # Ignore empty commands
+    if test -n $_sponge_current_command
+        set --local command ''
+        # Run filters
+        for filter in $sponge_filters
+            if $filter \
+                    $_sponge_current_command \
+                    $_sponge_current_command_exit_code \
+                    $_sponge_current_command_previously_in_history
+                set command $_sponge_current_command
+                break
+            end
+        end
+        set --prepend --global _sponge_queue $command
     end
-    set --prepend --global _sponge_queue $command
-  end
 end
diff --git a/config/fish/functions/_sponge_on_preexec.fish b/config/fish/functions/_sponge_on_preexec.fish
index a866491..8ded904 100644
--- a/config/fish/functions/_sponge_on_preexec.fish
+++ b/config/fish/functions/_sponge_on_preexec.fish
@@ -1,16 +1,16 @@
 function _sponge_on_preexec --on-event fish_preexec \
-  --argument-names command
-  _sponge_clear_state
+    --argument-names command
+    _sponge_clear_state
 
-  set --global _sponge_current_command $command
+    set --global _sponge_current_command $command
 
-  builtin history search --case-sensitive --exact --max=1 --null $command \
-    | read --local --null found_entries
+    builtin history search --case-sensitive --exact --max=1 --null $command \
+        | read --local --null found_entries
 
-  # If a command is in the history and in the queue, ignore it, like if it wasn’t in the history
-  if test (count $found_entries) -ne 0; and not contains $command $_sponge_queue
-    set --global _sponge_current_command_previously_in_history true
-  else
-    set --global _sponge_current_command_previously_in_history false
-  end
+    # If a command is in the history and in the queue, ignore it, like if it wasn’t in the history
+    if test (count $found_entries) -ne 0; and not contains $command $_sponge_queue
+        set --global _sponge_current_command_previously_in_history true
+    else
+        set --global _sponge_current_command_previously_in_history false
+    end
 end
diff --git a/config/fish/functions/_sponge_on_prompt.fish b/config/fish/functions/_sponge_on_prompt.fish
index 03e989a..dcc43ee 100644
--- a/config/fish/functions/_sponge_on_prompt.fish
+++ b/config/fish/functions/_sponge_on_prompt.fish
@@ -1,5 +1,5 @@
 function _sponge_on_prompt --on-event fish_prompt
-  if test $sponge_purge_only_on_exit = false
-    _sponge_remove_from_history
-  end
+    if test $sponge_purge_only_on_exit = false
+        _sponge_remove_from_history
+    end
 end
diff --git a/config/fish/functions/_sponge_remove_from_history.fish b/config/fish/functions/_sponge_remove_from_history.fish
index 4d4f827..6cce3f8 100644
--- a/config/fish/functions/_sponge_remove_from_history.fish
+++ b/config/fish/functions/_sponge_remove_from_history.fish
@@ -1,9 +1,9 @@
 function _sponge_remove_from_history
 
-  while test (count $_sponge_queue) -gt $sponge_delay
-    builtin history delete --case-sensitive --exact -- $_sponge_queue[-1]
-    set --erase _sponge_queue[-1]
-  end
+    while test (count $_sponge_queue) -gt $sponge_delay
+        builtin history delete --case-sensitive --exact -- $_sponge_queue[-1]
+        set --erase _sponge_queue[-1]
+    end
 
-  builtin history save
+    builtin history save
 end
diff --git a/config/fish/functions/bass.fish b/config/fish/functions/bass.fish
index 2b3af16..04c0783 100644
--- a/config/fish/functions/bass.fish
+++ b/config/fish/functions/bass.fish
@@ -1,29 +1,29 @@
 function bass
-  set -l bash_args $argv
-  set -l bass_debug
-  if test "$bash_args[1]_" = '-d_'
-    set bass_debug true
-    set -e bash_args[1]
-  end
+    set -l bash_args $argv
+    set -l bass_debug
+    if test "$bash_args[1]_" = -d_
+        set bass_debug true
+        set -e bash_args[1]
+    end
 
-  set -l script_file (mktemp)
-  if command -v python3 >/dev/null 2>&1
-    command python3 -sS (dirname (status -f))/__bass.py $bash_args 3>$script_file
-  else
-    command python -sS (dirname (status -f))/__bass.py $bash_args 3>$script_file
-  end
-  set -l bass_status $status
-  if test $bass_status -ne 0
-    return $bass_status
-  end
+    set -l script_file (mktemp)
+    if command -v python3 >/dev/null 2>&1
+        command python3 -sS (dirname (status -f))/__bass.py $bash_args 3>$script_file
+    else
+        command python -sS (dirname (status -f))/__bass.py $bash_args 3>$script_file
+    end
+    set -l bass_status $status
+    if test $bass_status -ne 0
+        return $bass_status
+    end
 
-  if test -n "$bass_debug"
-    cat $script_file
-  end
-  source $script_file
-  command rm $script_file
+    if test -n "$bass_debug"
+        cat $script_file
+    end
+    source $script_file
+    command rm $script_file
 end
 
 function __bass_usage
-  echo "Usage: bass [-d] <bash-command>"
+    echo "Usage: bass [-d] <bash-command>"
 end
diff --git a/config/fish/functions/load_nvm.fish b/config/fish/functions/load_nvm.fish
index 55ed127..3205b88 100644
--- a/config/fish/functions/load_nvm.fish
+++ b/config/fish/functions/load_nvm.fish
@@ -1,16 +1,16 @@
 function load_nvm --on-variable="PWD"
-  set -l default_node_version (nvm version default)
-  set -l node_version (nvm version)
-  set -l nvmrc_path (nvm_find_nvmrc)
-  if test -n "$nvmrc_path"
-    set -l nvmrc_node_version (nvm version (cat $nvmrc_path))
-    if test "$nvmrc_node_version" = "N/A"
-      nvm install (cat $nvmrc_path)
-    else if test "$nvmrc_node_version" != "$node_version"
-      nvm use $nvmrc_node_version
+    set -l default_node_version (nvm version default)
+    set -l node_version (nvm version)
+    set -l nvmrc_path (nvm_find_nvmrc)
+    if test -n "$nvmrc_path"
+        set -l nvmrc_node_version (nvm version (cat $nvmrc_path))
+        if test "$nvmrc_node_version" = N/A
+            nvm install (cat $nvmrc_path)
+        else if test "$nvmrc_node_version" != "$node_version"
+            nvm use $nvmrc_node_version
+        end
+    else if test "$node_version" != "$default_node_version"
+        echo "Reverting to default Node version"
+        nvm use default
     end
-  else if test "$node_version" != "$default_node_version"
-    echo "Reverting to default Node version"
-    nvm use default
-  end
 end
diff --git a/config/fish/functions/nvm_find_nvmrc.fish b/config/fish/functions/nvm_find_nvmrc.fish
index 359c1f9..14d616e 100644
--- a/config/fish/functions/nvm_find_nvmrc.fish
+++ b/config/fish/functions/nvm_find_nvmrc.fish
@@ -1,3 +1,3 @@
 function nvm_find_nvmrc
-  bass source $NVM_DIR/nvm.sh --no-use ';' nvm_find_nvmrc
+    bass source $NVM_DIR/nvm.sh --no-use ';' nvm_find_nvmrc
 end
diff --git a/config/fish/functions/paths.fish b/config/fish/functions/paths.fish
index 9f06b03..01721f6 100644
--- a/config/fish/functions/paths.fish
+++ b/config/fish/functions/paths.fish
@@ -158,7 +158,7 @@ function paths --description "Reveal the executable matches in shell paths or fi
     # check
     set -l built (type --type $input 12&>/dev/null)
     if test -n "$built"
-        and test "$built" = 'builtin'
+        and test "$built" = builtin
         set $foundStatus 0
         if not set -q _flag_c
             echo -e -n "builtin\n"
diff --git a/config/fish/functions/sponge_filter_failed.fish b/config/fish/functions/sponge_filter_failed.fish
index be26e5d..7cccaf2 100644
--- a/config/fish/functions/sponge_filter_failed.fish
+++ b/config/fish/functions/sponge_filter_failed.fish
@@ -1,11 +1,11 @@
 function sponge_filter_failed \
-  --argument-names command exit_code previously_in_history
+    --argument-names command exit_code previously_in_history
 
-  if test $previously_in_history = true -a $sponge_allow_previously_successful = true
-    return 1
-  end
+    if test $previously_in_history = true -a $sponge_allow_previously_successful = true
+        return 1
+    end
 
-  if contains $exit_code $sponge_successful_exit_codes
-    return 1
-  end
+    if contains $exit_code $sponge_successful_exit_codes
+        return 1
+    end
 end
diff --git a/config/fish/functions/sponge_filter_matched.fish b/config/fish/functions/sponge_filter_matched.fish
index c3c7ea2..ce7c26a 100644
--- a/config/fish/functions/sponge_filter_matched.fish
+++ b/config/fish/functions/sponge_filter_matched.fish
@@ -1,11 +1,11 @@
 function sponge_filter_matched \
-  --argument-names command
+    --argument-names command
 
-  for pattern in $sponge_regex_patterns
-    if string match --regex --quiet $pattern -- $command
-      return
+    for pattern in $sponge_regex_patterns
+        if string match --regex --quiet $pattern -- $command
+            return
+        end
     end
-  end
 
-  return 1
+    return 1
 end
diff --git a/config/fzf/completion.bash b/config/fzf/completion.bash
old mode 100755
new mode 100644
index 7404f6f..cede3a5
--- a/config/fzf/completion.bash
+++ b/config/fzf/completion.bash
@@ -1,3 +1,4 @@
+# shellcheck disable=all
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
diff --git a/config/fzf/completion.zsh b/config/fzf/completion.zsh
old mode 100755
new mode 100644
index bb256d9..6e67b07
--- a/config/fzf/completion.zsh
+++ b/config/fzf/completion.zsh
@@ -1,3 +1,4 @@
+# shellcheck disable=all
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
diff --git a/config/fzf/everforest.sh b/config/fzf/everforest.sh
index cffb6c5..eb1f109 100644
--- a/config/fzf/everforest.sh
+++ b/config/fzf/everforest.sh
@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # Everforest theme for fzf
 # Generated from template - do not edit manually
 
diff --git a/config/fzf/fzf.bash b/config/fzf/fzf.bash
old mode 100755
new mode 100644
diff --git a/config/fzf/fzf.zsh b/config/fzf/fzf.zsh
index 067b6cd..0026342 100755
--- a/config/fzf/fzf.zsh
+++ b/config/fzf/fzf.zsh
@@ -1,3 +1,5 @@
+#!/usr/bin/env zsh
+# shellcheck disable=SC1071
 # Setup fzf
 # ---------
 
diff --git a/config/fzf/key-bindings.bash b/config/fzf/key-bindings.bash
old mode 100755
new mode 100644
index c388d0d..5581694
--- a/config/fzf/key-bindings.bash
+++ b/config/fzf/key-bindings.bash
@@ -20,8 +20,8 @@ __fzf_select__() {
     -o -type d -print \
     -o -type l -print 2> /dev/null | cut -b3-"}"
   opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-} -m"
-  eval "$cmd" |
-    FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) "$@" |
+  # shellcheck disable=SC2091 # Intentionally execute output of __fzfcmd
+  eval "$cmd" | FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) "$@" |
     while read -r item; do
       printf '%q ' "$item" # escape special chars
     done
@@ -35,7 +35,8 @@ if [[ $- =~ i ]]; then
   }
 
   fzf-file-widget() {
-    local selected="$(__fzf_select__ "$@")"
+    local selected
+    selected="$(__fzf_select__ "$@")"
     READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
     READLINE_POINT=$((READLINE_POINT + ${#selected}))
   }
@@ -45,6 +46,7 @@ if [[ $- =~ i ]]; then
     cmd="${FZF_ALT_C_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
     -o -type d -print 2> /dev/null | cut -b3-"}"
     opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-} +m"
+    # shellcheck disable=SC2091 # Intentionally execute output of __fzfcmd
     dir=$(
       set +o pipefail
       eval "$cmd" | FZF_DEFAULT_OPTS="$opts" $(__fzfcmd)
@@ -55,6 +57,7 @@ if [[ $- =~ i ]]; then
     local output opts script
     opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
     script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
+    # shellcheck disable=SC2091 # Intentionally execute output of __fzfcmd
     output=$(
       set +o pipefail
       builtin fc -lnr -2147483648 |
diff --git a/config/fzf/key-bindings.fish b/config/fzf/key-bindings.fish
old mode 100755
new mode 100644
index 743c7c1..88fe13c
--- a/config/fzf/key-bindings.fish
+++ b/config/fzf/key-bindings.fish
@@ -15,158 +15,161 @@
 # ------------
 function fzf_key_bindings
 
-  # Store current token in $dir as root for the 'find' command
-  function fzf-file-widget -d "List files and folders"
-    set -l commandline (__fzf_parse_commandline)
-    set -l dir $commandline[1]
-    set -l fzf_query $commandline[2]
-    set -l prefix $commandline[3]
+    # Store current token in $dir as root for the 'find' command
+    function fzf-file-widget -d "List files and folders"
+        set -l commandline (__fzf_parse_commandline)
+        set -l dir $commandline[1]
+        set -l fzf_query $commandline[2]
+        set -l prefix $commandline[3]
 
-    # "-path \$dir'*/\\.*'" matches hidden files/folders inside $dir but not
-    # $dir itself, even if hidden.
-    test -n "$FZF_CTRL_T_COMMAND"; or set -l FZF_CTRL_T_COMMAND "
+        # "-path \$dir'*/\\.*'" matches hidden files/folders inside $dir but not
+        # $dir itself, even if hidden.
+        test -n "$FZF_CTRL_T_COMMAND"; or set -l FZF_CTRL_T_COMMAND "
     command find -L \$dir -mindepth 1 \\( -path \$dir'*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
     -o -type f -print \
     -o -type d -print \
     -o -type l -print 2> /dev/null | sed 's@^\./@@'"
 
-    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
-      eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r; set result $result $r; end
+        test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+        begin
+            set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
+            eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r
+                set result $result $r
+            end
+        end
+        if [ -z "$result" ]
+            commandline -f repaint
+            return
+        else
+            # Remove last token from commandline.
+            commandline -t ""
+        end
+        for i in $result
+            commandline -it -- $prefix
+            commandline -it -- (string escape $i)
+            commandline -it -- ' '
+        end
+        commandline -f repaint
     end
-    if [ -z "$result" ]
-      commandline -f repaint
-      return
-    else
-      # Remove last token from commandline.
-      commandline -t ""
+
+    function fzf-history-widget -d "Show command history"
+        test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+        begin
+            set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS +m"
+
+            set -l FISH_MAJOR (echo $version | cut -f1 -d.)
+            set -l FISH_MINOR (echo $version | cut -f2 -d.)
+
+            # history's -z flag is needed for multi-line support.
+            # history's -z flag was added in fish 2.4.0, so don't use it for versions
+            # before 2.4.0.
+            if [ "$FISH_MAJOR" -gt 2 -o \( "$FISH_MAJOR" -eq 2 -a "$FISH_MINOR" -ge 4 \) ]
+
+                history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
+                and commandline -- $result
+            else
+                history | eval (__fzfcmd) -q '(commandline)' | read -l result
+                and commandline -- $result
+            end
+        end
+        commandline -f repaint
     end
-    for i in $result
-      commandline -it -- $prefix
-      commandline -it -- (string escape $i)
-      commandline -it -- ' '
-    end
-    commandline -f repaint
-  end
 
-  function fzf-history-widget -d "Show command history"
-    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS +m"
+    function fzf-cd-widget -d "Change directory"
+        set -l commandline (__fzf_parse_commandline)
+        set -l dir $commandline[1]
+        set -l fzf_query $commandline[2]
+        set -l prefix $commandline[3]
 
-      set -l FISH_MAJOR (echo $version | cut -f1 -d.)
-      set -l FISH_MINOR (echo $version | cut -f2 -d.)
-
-      # history's -z flag is needed for multi-line support.
-      # history's -z flag was added in fish 2.4.0, so don't use it for versions
-      # before 2.4.0.
-      if [ "$FISH_MAJOR" -gt 2 -o \( "$FISH_MAJOR" -eq 2 -a "$FISH_MINOR" -ge 4 \) ];
-        history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
-        and commandline -- $result
-      else
-        history | eval (__fzfcmd) -q '(commandline)' | read -l result
-        and commandline -- $result
-      end
-    end
-    commandline -f repaint
-  end
-
-  function fzf-cd-widget -d "Change directory"
-    set -l commandline (__fzf_parse_commandline)
-    set -l dir $commandline[1]
-    set -l fzf_query $commandline[2]
-    set -l prefix $commandline[3]
-
-    test -n "$FZF_ALT_C_COMMAND"; or set -l FZF_ALT_C_COMMAND "
+        test -n "$FZF_ALT_C_COMMAND"; or set -l FZF_ALT_C_COMMAND "
     command find -L \$dir -mindepth 1 \\( -path \$dir'*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
     -o -type d -print 2> /dev/null | sed 's@^\./@@'"
-    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
-      eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
+        test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+        begin
+            set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
+            eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
 
-      if [ -n "$result" ]
-        cd -- $result
+            if [ -n "$result" ]
+                cd -- $result
 
-        # Remove last token from commandline.
-        commandline -t ""
-        commandline -it -- $prefix
-      end
+                # Remove last token from commandline.
+                commandline -t ""
+                commandline -it -- $prefix
+            end
+        end
+
+        commandline -f repaint
     end
 
-    commandline -f repaint
-  end
-
-  function __fzfcmd
-    test -n "$FZF_TMUX"; or set FZF_TMUX 0
-    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
-    if [ -n "$FZF_TMUX_OPTS" ]
-      echo "fzf-tmux $FZF_TMUX_OPTS -- "
-    else if [ $FZF_TMUX -eq 1 ]
-      echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
-    else
-      echo "fzf"
-    end
-  end
-
-  bind \ct fzf-file-widget
-  bind \cr fzf-history-widget
-  bind \ec fzf-cd-widget
-
-  if bind -M insert > /dev/null 2>&1
-    bind -M insert \ct fzf-file-widget
-    bind -M insert \cr fzf-history-widget
-    bind -M insert \ec fzf-cd-widget
-  end
-
-  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
-    set -l commandline (commandline -t)
-
-    # strip -option= from token if present
-    set -l prefix (string match -r -- '^-[^\s=]+=' $commandline)
-    set commandline (string replace -- "$prefix" '' $commandline)
-
-    # eval is used to do shell expansion on paths
-    eval set commandline $commandline
-
-    if [ -z $commandline ]
-      # Default to current directory with no --query
-      set dir '.'
-      set fzf_query ''
-    else
-      set dir (__fzf_get_dir $commandline)
-
-      if [ "$dir" = "." -a (string sub -l 1 -- $commandline) != '.' ]
-        # if $dir is "." but commandline is not a relative path, this means no file path found
-        set fzf_query $commandline
-      else
-        # Also remove trailing slash after dir, to "split" input properly
-        set fzf_query (string replace -r "^$dir/?" -- '' "$commandline")
-      end
+    function __fzfcmd
+        test -n "$FZF_TMUX"; or set FZF_TMUX 0
+        test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+        if [ -n "$FZF_TMUX_OPTS" ]
+            echo "fzf-tmux $FZF_TMUX_OPTS -- "
+        else if [ $FZF_TMUX -eq 1 ]
+            echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
+        else
+            echo fzf
+        end
     end
 
-    echo $dir
-    echo $fzf_query
-    echo $prefix
-  end
+    bind \ct fzf-file-widget
+    bind \cr fzf-history-widget
+    bind \ec fzf-cd-widget
 
-  function __fzf_get_dir -d 'Find the longest existing filepath from input string'
-    set dir $argv
-
-    # Strip all trailing slashes. Ignore if $dir is root dir (/)
-    if [ (string length -- $dir) -gt 1 ]
-      set dir (string replace -r '/*$' -- '' $dir)
+    if bind -M insert >/dev/null 2>&1
+        bind -M insert \ct fzf-file-widget
+        bind -M insert \cr fzf-history-widget
+        bind -M insert \ec fzf-cd-widget
     end
 
-    # Iteratively check if dir exists and strip tail end of path
-    while [ ! -d "$dir" ]
-      # If path is absolute, this can keep going until ends up at /
-      # If path is relative, this can keep going until entire input is consumed, dirname returns "."
-      set dir (dirname -- "$dir")
+    function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
+        set -l commandline (commandline -t)
+
+        # strip -option= from token if present
+        set -l prefix (string match -r -- '^-[^\s=]+=' $commandline)
+        set commandline (string replace -- "$prefix" '' $commandline)
+
+        # eval is used to do shell expansion on paths
+        eval set commandline $commandline
+
+        if [ -z $commandline ]
+            # Default to current directory with no --query
+            set dir '.'
+            set fzf_query ''
+        else
+            set dir (__fzf_get_dir $commandline)
+
+            if [ "$dir" = "." -a (string sub -l 1 -- $commandline) != '.' ]
+                # if $dir is "." but commandline is not a relative path, this means no file path found
+                set fzf_query $commandline
+            else
+                # Also remove trailing slash after dir, to "split" input properly
+                set fzf_query (string replace -r "^$dir/?" -- '' "$commandline")
+            end
+        end
+
+        echo $dir
+        echo $fzf_query
+        echo $prefix
     end
 
-    echo $dir
-  end
+    function __fzf_get_dir -d 'Find the longest existing filepath from input string'
+        set dir $argv
+
+        # Strip all trailing slashes. Ignore if $dir is root dir (/)
+        if [ (string length -- $dir) -gt 1 ]
+            set dir (string replace -r '/*$' -- '' $dir)
+        end
+
+        # Iteratively check if dir exists and strip tail end of path
+        while [ ! -d "$dir" ]
+            # If path is absolute, this can keep going until ends up at /
+            # If path is relative, this can keep going until entire input is consumed, dirname returns "."
+            set dir (dirname -- "$dir")
+        end
+
+        echo $dir
+    end
 
 end
diff --git a/config/fzf/key-bindings.zsh b/config/fzf/key-bindings.zsh
old mode 100755
new mode 100644
index dfb473c..5c95782
--- a/config/fzf/key-bindings.zsh
+++ b/config/fzf/key-bindings.zsh
@@ -1,3 +1,4 @@
+# shellcheck disable=all
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
diff --git a/config/karabiner/karabiner.json b/config/karabiner/karabiner.json
index 2e6943b..fd82513 100644
--- a/config/karabiner/karabiner.json
+++ b/config/karabiner/karabiner.json
@@ -1,68 +1,68 @@
 {
-    "profiles": [
+  "profiles": [
+    {
+      "complex_modifications": {
+        "rules": [
+          {
+            "description": "Change right_command+hjkl to arrow keys",
+            "manipulators": [
+              {
+                "from": {
+                  "key_code": "h",
+                  "modifiers": {
+                    "mandatory": ["right_command"],
+                    "optional": ["any"]
+                  }
+                },
+                "to": [{ "key_code": "left_arrow" }],
+                "type": "basic"
+              },
+              {
+                "from": {
+                  "key_code": "j",
+                  "modifiers": {
+                    "mandatory": ["right_command"],
+                    "optional": ["any"]
+                  }
+                },
+                "to": [{ "key_code": "down_arrow" }],
+                "type": "basic"
+              },
+              {
+                "from": {
+                  "key_code": "k",
+                  "modifiers": {
+                    "mandatory": ["right_command"],
+                    "optional": ["any"]
+                  }
+                },
+                "to": [{ "key_code": "up_arrow" }],
+                "type": "basic"
+              },
+              {
+                "from": {
+                  "key_code": "l",
+                  "modifiers": {
+                    "mandatory": ["right_command"],
+                    "optional": ["any"]
+                  }
+                },
+                "to": [{ "key_code": "right_arrow" }],
+                "type": "basic"
+              }
+            ]
+          }
+        ]
+      },
+      "name": "Default profile",
+      "selected": true,
+      "simple_modifications": [
         {
-            "complex_modifications": {
-                "rules": [
-                    {
-                        "description": "Change right_command+hjkl to arrow keys",
-                        "manipulators": [
-                            {
-                                "from": {
-                                    "key_code": "h",
-                                    "modifiers": {
-                                        "mandatory": ["right_command"],
-                                        "optional": ["any"]
-                                    }
-                                },
-                                "to": [{ "key_code": "left_arrow" }],
-                                "type": "basic"
-                            },
-                            {
-                                "from": {
-                                    "key_code": "j",
-                                    "modifiers": {
-                                        "mandatory": ["right_command"],
-                                        "optional": ["any"]
-                                    }
-                                },
-                                "to": [{ "key_code": "down_arrow" }],
-                                "type": "basic"
-                            },
-                            {
-                                "from": {
-                                    "key_code": "k",
-                                    "modifiers": {
-                                        "mandatory": ["right_command"],
-                                        "optional": ["any"]
-                                    }
-                                },
-                                "to": [{ "key_code": "up_arrow" }],
-                                "type": "basic"
-                            },
-                            {
-                                "from": {
-                                    "key_code": "l",
-                                    "modifiers": {
-                                        "mandatory": ["right_command"],
-                                        "optional": ["any"]
-                                    }
-                                },
-                                "to": [{ "key_code": "right_arrow" }],
-                                "type": "basic"
-                            }
-                        ]
-                    }
-                ]
-            },
-            "name": "Default profile",
-            "selected": true,
-            "simple_modifications": [
-                {
-                    "from": { "key_code": "caps_lock" },
-                    "to": [{ "key_code": "f18" }]
-                }
-            ],
-            "virtual_hid_keyboard": { "keyboard_type_v2": "iso" }
+          "from": { "key_code": "caps_lock" },
+          "to": [{ "key_code": "f18" }]
         }
-    ]
-}
\ No newline at end of file
+      ],
+      "virtual_hid_keyboard": { "keyboard_type_v2": "iso" }
+    }
+  ]
+}
diff --git a/config/nvim/lua/plugins/neotree.lua b/config/nvim/lua/plugins/neotree.lua
index bfb029b..407e1c6 100644
--- a/config/nvim/lua/plugins/neotree.lua
+++ b/config/nvim/lua/plugins/neotree.lua
@@ -55,7 +55,8 @@ return {
       {
         event = 'file_opened',
         handler = function(_)
-          require('neo-tree.command').execute { action = 'close' }
+          local c = require 'neo-tree.command'
+          c.execute { action = 'close' }
         end,
       },
     },
diff --git a/config/sesh/sesh.toml b/config/sesh/sesh.toml
index b617d2a..2cc11d8 100644
--- a/config/sesh/sesh.toml
+++ b/config/sesh/sesh.toml
@@ -56,4 +56,3 @@ disable_startup_command = true
 name = "Downloads"
 path = "~/Downloads"
 startup_command = "lsa"
-
diff --git a/config/tmux/theme-dark.conf b/config/tmux/theme-dark.conf
index b392f5e..397f45e 100644
--- a/config/tmux/theme-dark.conf
+++ b/config/tmux/theme-dark.conf
@@ -1,2 +1 @@
 set -g @catppuccin_flavor "mocha"
-
diff --git a/config/zsh/plugins/nvm-auto-use/nvm-auto-use.plugin.zsh b/config/zsh/plugins/nvm-auto-use/nvm-auto-use.plugin.zsh
index 8610962..b0c11d7 100644
--- a/config/zsh/plugins/nvm-auto-use/nvm-auto-use.plugin.zsh
+++ b/config/zsh/plugins/nvm-auto-use/nvm-auto-use.plugin.zsh
@@ -1,4 +1,4 @@
-# shellcheck shell=zsh
+# shellcheck disable=SC1071,SC1103,SC2148
 # Source: https://github.com/nvm-sh/nvm#zsh
 # place this after nvm initialization!
 autoload -U add-zsh-hook
diff --git a/cspell.config.yaml b/cspell.config.yaml
new file mode 100644
index 0000000..6314a8b
--- /dev/null
+++ b/cspell.config.yaml
@@ -0,0 +1,52 @@
+version: "0.2"
+ignorePaths: []
+dictionaryDefinitions: []
+dictionaries: []
+words:
+  - aquasec
+  - cdgr
+  - cheatsheets
+  - CODEQUALITY
+  - DEVSKIM
+  - dscacheutil
+  - emptytrash
+  - flushcache
+  - getifaddr
+  - goenv
+  - irssi
+  - Ismo
+  - isodate
+  - KEYSFILE
+  - KEYSSOURCE
+  - killall
+  - lakka
+  - libexec
+  - Licence
+  - lmstudio
+  - localip
+  - locatedb
+  - LOGFILE
+  - luarocks
+  - mvdan
+  - myip
+  - onnimonni
+  - opencode
+  - optstring
+  - orbstack
+  - osascript
+  - phpenv
+  - psub
+  - pyenv
+  - SARIF
+  - shellcheck
+  - shfmt
+  - shivammathur
+  - spelllang
+  - updatedb
+  - vendordirs
+  - vimrc
+  - virtualenv
+  - Vuorinen
+  - zedit
+ignoreWords: []
+import: []
diff --git a/docs/tmux-keybindings.md b/docs/tmux-keybindings.md
index d80ed66..604c773 100644
--- a/docs/tmux-keybindings.md
+++ b/docs/tmux-keybindings.md
@@ -33,7 +33,7 @@ Leader: `<ctrl><space>`
     ?       List key bindings
     D       Choose and detach a client from a list
     E       Spread panes out evenly
-    L       last-session (via sesh) 
+    L       last-session (via sesh)
     M       Clear the marked pane
     N       sesh ui
     T       tms
@@ -87,4 +87,3 @@ Leader: `<ctrl><space>`
     S-Left  Move the visible part of the window left
     S-Right Move the visible part of the window right
 ```
-
diff --git a/local/bin/a b/local/bin/a
index f46f687..22ab5a4 100755
--- a/local/bin/a
+++ b/local/bin/a
@@ -103,9 +103,9 @@ fetch_keys_if_missing()
   if [[ ! -f "$KEYS_FILE" ]]; then
     log_message "Keys file '$KEYS_FILE' not found. Attempting to fetch from $KEYS_SOURCE..."
     mkdir -p "$(dirname "$KEYS_FILE")"
-    curl -s "$KEYS_SOURCE" -o "$KEYS_FILE"
 
-    if [[ $? -ne 0 || ! -s "$KEYS_FILE" ]]; then
+    if ! curl -s "$KEYS_SOURCE" -o "$KEYS_FILE" || [[ ! -s "$KEYS_FILE" ]]; then
+      rm -f "$KEYS_FILE" 2> /dev/null || true
       log_message "Error: Failed to fetch keys from $KEYS_SOURCE"
       exit 1
     fi
@@ -126,10 +126,12 @@ encrypt_file_or_directory()
   elif [[ -f "$file" ]]; then
     fetch_keys_if_missing
     local output_file="${file}.age"
-    age -R "$KEYS_FILE" "$file" > "$output_file"
-    if [[ $? -eq 0 ]]; then
+    local temp_file
+    temp_file="$(mktemp -p "$(dirname "$file")")"
+    if age -R "$KEYS_FILE" "$file" > "$temp_file" && mv "$temp_file" "$output_file"; then
       log_message "File encrypted successfully: $output_file"
     else
+      rm -f "$temp_file"
       log_message "Error: Failed to encrypt file '$file'."
       exit 1
     fi
@@ -147,10 +149,12 @@ decrypt_file_or_directory()
   elif [[ -f "$file" ]]; then
     fetch_keys_if_missing
     local output_file="${file%.age}"
-    age -d -i "$KEYS_FILE" "$file" > "$output_file"
-    if [[ $? -eq 0 ]]; then
+    local temp_file
+    temp_file="$(mktemp -p "$(dirname "$file")")"
+    if age -d -i "$KEYS_FILE" "$file" > "$temp_file" && mv "$temp_file" "$output_file"; then
       log_message "File decrypted successfully: $output_file"
     else
+      rm -f "$temp_file"
       log_message "Error: Failed to decrypt file '$file'."
       exit 1
     fi
diff --git a/local/bin/ad b/local/bin/ad
index eb81115..f932446 100755
--- a/local/bin/ad
+++ b/local/bin/ad
@@ -36,9 +36,8 @@ if [[ ! -f "$KEYS_FILE" ]]; then
   mkdir -p "$(dirname "$KEYS_FILE")"
 
   # Fetch the keys and save to the file
-  curl -s "$KEYS_SOURCE" -o "$KEYS_FILE"
-
-  if [[ $? -ne 0 || ! -s "$KEYS_FILE" ]]; then
+  if ! curl -s "$KEYS_SOURCE" -o "$KEYS_FILE" || [[ ! -s "$KEYS_FILE" ]]; then
+    rm -f "$KEYS_FILE" 2> /dev/null || true
     echo "Error: Failed to fetch keys from $KEYS_SOURCE"
     exit 1
   fi
@@ -50,11 +49,11 @@ fi
 
 # Decrypt the file
 OUTPUT_FILE="${FILE%.age}"
-age -d -i "$KEYS_FILE" "$FILE" > "$OUTPUT_FILE"
-
-if [[ $? -eq 0 ]]; then
+TEMP_FILE="$(mktemp -p "$(dirname "$OUTPUT_FILE")")"
+if age -d -i "$KEYS_FILE" "$FILE" > "$TEMP_FILE" && mv "$TEMP_FILE" "$OUTPUT_FILE"; then
   echo "File decrypted successfully: $OUTPUT_FILE"
 else
+  rm -f "$TEMP_FILE"
   echo "Error: Failed to decrypt file."
   exit 1
 fi
diff --git a/local/bin/ae b/local/bin/ae
index 400b109..3ed6593 100755
--- a/local/bin/ae
+++ b/local/bin/ae
@@ -37,9 +37,7 @@ if [[ ! -f "$KEYS_FILE" ]]; then
   mkdir -p "$(dirname "$KEYS_FILE")"
 
   # Fetch the keys and save to the file
-  curl -s "$KEYS_SOURCE" -o "$KEYS_FILE"
-
-  if [[ $? -ne 0 || ! -s "$KEYS_FILE" ]]; then
+  if ! curl -s "$KEYS_SOURCE" -o "$KEYS_FILE" || [[ ! -s "$KEYS_FILE" ]]; then
     echo "Error: Failed to fetch keys from $KEYS_SOURCE"
     exit 1
   fi
@@ -51,9 +49,7 @@ fi
 
 # Encrypt the file
 OUTPUT_FILE="${FILE}.age"
-age -R "$KEYS_FILE" "$FILE" > "$OUTPUT_FILE"
-
-if [[ $? -eq 0 ]]; then
+if age -R "$KEYS_FILE" "$FILE" > "$OUTPUT_FILE"; then
   echo "File encrypted successfully: $OUTPUT_FILE"
 else
   echo "Error: Failed to encrypt file."
diff --git a/local/bin/dfm b/local/bin/dfm
index 9812e2a..f19890a 100755
--- a/local/bin/dfm
+++ b/local/bin/dfm
@@ -25,6 +25,7 @@ source_file()
   case "$CURRENT_SHELL" in
     fish)
       if [[ -f "$file.fish" ]]; then
+        # shellcheck disable=SC1090
         source "$file.fish"
       else
         echo "Fish shell file not found: $file.fish"
@@ -32,6 +33,7 @@ source_file()
       fi
       ;;
     sh | bash | zsh)
+      # shellcheck disable=SC1090
       source "$file"
       ;;
     *)
diff --git a/local/bin/fzf-tmux b/local/bin/fzf-tmux
index 8fe75c6..929241f 100755
--- a/local/bin/fzf-tmux
+++ b/local/bin/fzf-tmux
@@ -142,7 +142,7 @@ if [[ ! "$opt" =~ "-E" ]] && tmux list-panes -F '#F' | grep -q Z; then
   zoomed_without_popup=1
   original_window=$(tmux display-message -p "#{window_id}")
   tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - '\\;' do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
-  tmux swap-pane -t $tmp_window \; select-window -t $tmp_window
+  tmux swap-pane -t "$tmp_window" \; select-window -t "$tmp_window"
 fi
 
 set -e
@@ -154,15 +154,16 @@ fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
 fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
 fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
 if tmux_win_opts=$(tmux show-options -p remain-on-exit \; show-options -p synchronize-panes 2> /dev/null); then
-  tmux_win_opts=($(sed '/ off/d; s/synchronize-panes/set-option -p synchronize-panes/; s/remain-on-exit/set-option -p remain-on-exit/; s/$/ \\;/' <<< "$tmux_win_opts"))
+  mapfile -t tmux_win_opts < <(sed '/ off/d; s/synchronize-panes/set-option -p synchronize-panes/; s/remain-on-exit/set-option -p remain-on-exit/; s/$/ \\;/' <<< "$tmux_win_opts")
   tmux_off_opts='; set-option -p synchronize-panes off ; set-option -p remain-on-exit off'
 else
-  tmux_win_opts=($(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/'))
+  mapfile -t tmux_win_opts < <(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/')
   tmux_off_opts='; set-window-option synchronize-panes off ; set-window-option remain-on-exit off'
 fi
+# shellcheck disable=SC2329
 cleanup()
 {
-  \rm -f $argsf $fifo1 $fifo2 $fifo3
+  \rm -f "$argsf" "$fifo1" "$fifo2" "$fifo3"
 
   # Restore tmux window options
   if [[ "${#tmux_win_opts[@]}" -gt 0 ]]; then
@@ -172,9 +173,9 @@ cleanup()
   # Remove temp window if we were zoomed without popup options
   if [[ -n "$zoomed_without_popup" ]]; then
     tmux display-message -p "#{window_id}" > /dev/null
-    tmux swap-pane -t $original_window \; \
-      select-window -t $original_window \; \
-      kill-window -t $tmp_window \; \
+    tmux swap-pane -t "$original_window" \; \
+      select-window -t "$original_window" \; \
+      kill-window -t "$tmp_window" \; \
       resize-pane -Z
   fi
 
@@ -209,39 +210,40 @@ echo "$envs;" > "$argsf"
 opts=$(printf "%q " "${args[@]}")
 
 pppid=$$
-echo -n "trap 'kill -SIGUSR1 -$pppid' EXIT SIGINT SIGTERM;" >> $argsf
+echo -n "trap 'kill -SIGUSR1 -$pppid' EXIT SIGINT SIGTERM;" >> "$argsf"
 close="; trap - EXIT SIGINT SIGTERM $close"
 
-export TMUX=$(cut -d , -f 1,2 <<< "$TMUX")
-mkfifo -m o+w $fifo2
+export TMUX
+TMUX=$(cut -d , -f 1,2 <<< "$TMUX")
+mkfifo -m o+w "$fifo2"
 if [[ "$opt" =~ "-E" ]]; then
-  cat $fifo2 &
+  cat "$fifo2" &
   if [[ -n "$term" ]] || [[ -t 0 ]]; then
-    cat <<< "\"$fzf\" $opts > $fifo2; out=\$? $close; exit \$out" >> $argsf
+    cat <<< "\"$fzf\" $opts > $fifo2; out=\$? $close; exit \$out" >> "$argsf"
   else
-    mkfifo $fifo1
-    cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; out=\$? $close; exit \$out" >> $argsf
-    cat <&0 > $fifo1 &
+    mkfifo "$fifo1"
+    cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; out=\$? $close; exit \$out" >> "$argsf"
+    cat <&0 > "$fifo1" &
   fi
 
-  tmux popup -d "$PWD" $opt "bash $argsf" > /dev/null 2>&1
+  tmux popup -d "$PWD" "$opt" "bash $argsf" > /dev/null 2>&1
   exit $?
 fi
 
-mkfifo -m o+w $fifo3
+mkfifo -m o+w "$fifo3"
 if [[ -n "$term" ]] || [[ -t 0 ]]; then
-  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" >> $argsf
+  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" >> "$argsf"
 else
-  mkfifo $fifo1
-  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> $argsf
-  cat <&0 > $fifo1 &
+  mkfifo "$fifo1"
+  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> "$argsf"
+  cat <&0 > "$fifo1" &
 fi
 tmux \
-  split-window -c "$PWD" $opt "bash -c 'exec -a fzf bash $argsf'" $swap \
-  $tmux_off_opts \
+  split-window -c "$PWD" "$opt" "bash -c 'exec -a fzf bash $argsf'" "$swap" \
+  "$tmux_off_opts" \
   > /dev/null 2>&1 || {
   "$fzf" "${args[@]}"
   exit $?
 }
-cat $fifo2
-exit "$(cat $fifo3)"
+cat "$fifo2"
+exit "$(cat "$fifo3")"
diff --git a/local/bin/git-attributes b/local/bin/git-attributes
index d0ffbd9..84e378d 100755
--- a/local/bin/git-attributes
+++ b/local/bin/git-attributes
@@ -25,27 +25,27 @@ fi
 # Output functions
 msg_err()
 {
-  echo -e "\e[31m$@\e[0m" >&2
+  echo -e "\e[31m$*\e[0m" >&2
 }
 
 msg_success()
 {
-  echo -e "\e[32m$@\e[0m"
+  echo -e "\e[32m$*\e[0m"
 }
 
 msg_warn()
 {
-  echo -e "\e[33m$@\e[0m" >&2
+  echo -e "\e[33m$*\e[0m" >&2
 }
 
 msg_info()
 {
-  echo -e "\e[36m$@\e[0m"
+  echo -e "\e[36m$*\e[0m"
 }
 
 msg_debug()
 {
-  [[ $VERBOSE -eq 1 ]] && echo -e "\e[35m$@\e[0m"
+  [[ $VERBOSE -eq 1 ]] && echo -e "\e[35m$*\e[0m"
 }
 
 show_help()
@@ -180,7 +180,8 @@ format_rule()
 get_file_extension()
 {
   local file="$1"
-  local basename=$(basename "$file")
+  local basename
+  basename=$(basename "$file")
   local extension=""
 
   # Check if file has no extension or is a dotfile
@@ -231,8 +232,8 @@ suggest_rule()
   # If file path contains .d/ pattern, we need special handling
   if [[ "$file" =~ \.d/ ]]; then
     # Extract the pattern part that includes the .d/ directory
-    local dir_part=$(dirname "$file")
-    local base_name=$(basename "$file")
+    local dir_part
+    dir_part=$(dirname "$file")
 
     # Check if it's a config directory pattern worth capturing
     if [[ "$dir_part" =~ /(\.d|[^/]+\.d)$ ]]; then
@@ -430,7 +431,8 @@ detect_shell_scripts()
       fi
 
       # Skip if file extension already covered
-      local extension=$(get_file_extension "$rel_path")
+      local extension
+      extension=$(get_file_extension "$rel_path")
       if [[ "$extension" != "$rel_path" ]] && grep -q "^\*\.$extension " <<< "$existing_rules"; then
         msg_debug "Script covered by extension rule: $rel_path (*.$extension)"
         continue
@@ -458,7 +460,8 @@ detect_shell_scripts()
       fi
 
       # Group by directory
-      local dir=$(dirname "$rel_path")
+      local dir
+      dir=$(dirname "$rel_path")
       if [[ "$dir" == "." ]]; then
         dir="root"
       fi
@@ -480,7 +483,8 @@ detect_shell_scripts()
 
       # Check if we can use directory-based rules instead of individual files
       for dir in "${!scripts_by_dir[@]}"; do
-        local files_in_dir=$(echo -e "${scripts_by_dir[$dir]}" | wc -l)
+        local files_in_dir
+        files_in_dir=$(echo -e "${scripts_by_dir[$dir]}" | wc -l)
         local dir_path="$dir"
 
         if [[ "$dir" == "root" ]]; then
@@ -575,7 +579,8 @@ suggest_gitattributes()
   declare -A seen_patterns=()
 
   while IFS= read -r file; do
-    local suggestion=$(suggest_rule "$file")
+    local suggestion
+    suggestion=$(suggest_rule "$file")
     if [[ -n "$suggestion" ]]; then
       IFS=':' read -r pattern attributes <<< "$suggestion"
 
@@ -639,7 +644,8 @@ suggest_gitattributes()
       formatted_suggestions+="$pattern\n"
       echo "$pattern"
     else
-      local formatted_rule=$(printf "%-${format_width}s %s\n" "$pattern" "$attributes")
+      local formatted_rule
+      formatted_rule=$(printf "%-${format_width}s %s\n" "$pattern" "$attributes")
       formatted_suggestions+="$formatted_rule\n"
       echo "$formatted_rule"
     fi
diff --git a/local/bin/iterm2_shell_integration.zsh b/local/bin/iterm2_shell_integration.zsh
old mode 100755
new mode 100644
index b290510..64c8a73
--- a/local/bin/iterm2_shell_integration.zsh
+++ b/local/bin/iterm2_shell_integration.zsh
@@ -1,3 +1,4 @@
+# shellcheck disable=all
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; either version 2
diff --git a/local/bin/pushover b/local/bin/pushover
index 7c081ca..ddab8b9 100755
--- a/local/bin/pushover
+++ b/local/bin/pushover
@@ -142,7 +142,7 @@ if [ ! -x "${CURL}" ]; then
   exit 1
 fi
 
-devices="$(printf "${devices}" | xargs -n1 | sort -u | uniq)\n"
+devices="$(printf "%s" "${devices}" | xargs -n1 | sort -u)"
 
 if [ -z "${devices}" ]; then
   __pushover_send_message
diff --git a/local/bin/x-env-list b/local/bin/x-env-list
index 082bfe2..0c6a30e 100755
--- a/local/bin/x-env-list
+++ b/local/bin/x-env-list
@@ -126,11 +126,11 @@ if [[ -f "$CONFIG_FILE" ]]; then
     PROTECTED_KEYS+=("$key")
   done <<< "$CUSTOM_KEYS"
 
-  SKIPPED+=("$(yq '.skipped_keys[]' "$CONFIG_FILE")")
-  while IFS= read -r key; do
+  mapfile -t SKIPPED < <(yq '.skipped_keys[]' "$CONFIG_FILE")
+  for key in "${SKIPPED[@]}"; do
     # Add to default_skipped_keys
     SKIPPED_KEYS+=("$key")
-  done <<< "$SKIPPED"
+  done
 
   CUSTOM_GROUPS=$(yq '.custom_grouping[]' "$CONFIG_FILE")
   while IFS= read -r group; do
@@ -159,6 +159,7 @@ is_protected()
       return 0
     fi
     # Wildcard match (protected_key contains '*')
+    # shellcheck disable=SC2053 # Intentional glob matching - protected_key contains wildcard patterns
     if [[ "$protected_key" == *"*"* ]] && [[ "$key" == $protected_key ]]; then
       return 0
     fi
@@ -198,6 +199,7 @@ is_skipped()
       return 0
     fi
     # Wildcard match (skipped_key contains '*')
+    # shellcheck disable=SC2053 # Intentional glob matching - skipped_key contains wildcard patterns
     if [[ "$skipped_key" == *"*"* ]] && [[ "$key" == $skipped_key ]]; then
       return 0
     fi
@@ -244,8 +246,15 @@ while IFS='=' read -r key value; do
     value="[protected value]"
   fi
 
-  # Update group data
-  if [[ ! " ${all_groups[*]} " =~ " $group " ]]; then
+  # Update group data - check if group already exists
+  group_exists=false
+  for existing_group in "${all_groups[@]}"; do
+    if [[ "$existing_group" == "$group" ]]; then
+      group_exists=true
+      break
+    fi
+  done
+  if [[ "$group_exists" == false ]]; then
     all_groups+=("$group")
   fi
 
diff --git a/local/bin/x-load-configs b/local/bin/x-load-configs
index e193e67..36e98cb 100755
--- a/local/bin/x-load-configs
+++ b/local/bin/x-load-configs
@@ -30,10 +30,9 @@ config_msg()
 {
   # if $1 is empty, return
   [ -z "$1" ] && return
-  [ -z "$2" ] && $2=""
 
   local msg_type="$1"
-  local msg_content="$2"
+  local msg_content="${2:-}"
   [[ "$VERBOSE" -eq 1 ]] && printf 'x-load-configs: %s %s\n' "$msg_type" "$msg_content"
   return 0
 }
@@ -50,7 +49,8 @@ source_config()
 {
   local config_file=$1
   if [ -f "$config_file" ]; then
-    eval "$config_file"
+    # shellcheck disable=SC1090
+    source "$config_file"
     config_msg "Sourced" "$config_file"
   else
     msg "Config file $config_file not found"
diff --git a/local/bin/x-pr-comments b/local/bin/x-pr-comments
index e9087e7..15e6aa2 100755
--- a/local/bin/x-pr-comments
+++ b/local/bin/x-pr-comments
@@ -60,7 +60,7 @@ log_debug()
 filter_coderabbit_addressed_comments()
 {
   local input_data="$1"
-  local is_wrapped="$2"  # true for {comments: [...]}, false for [...]
+  local is_wrapped="$2" # true for {comments: [...]}, false for [...]
 
   local jq_filter='select(
     (.user.login | contains("coderabbit") | not) or
@@ -68,9 +68,9 @@ filter_coderabbit_addressed_comments()
   )'
 
   if [[ "$is_wrapped" == "true" ]]; then
-    echo "$input_data" | jq "{comments: [.comments[] | $jq_filter]}" 2>/dev/null || echo "$input_data"
+    echo "$input_data" | jq "{comments: [.comments[] | $jq_filter]}" 2> /dev/null || echo "$input_data"
   else
-    echo "$input_data" | jq "[.[] | $jq_filter]" 2>/dev/null || echo "$input_data"
+    echo "$input_data" | jq "[.[] | $jq_filter]" 2> /dev/null || echo "$input_data"
   fi
 }
 
@@ -79,13 +79,13 @@ fetch_and_filter_data()
 {
   local endpoint="$1"
   local data_name="$2"
-  local is_wrapped="$3"  # true/false
+  local is_wrapped="$3" # true/false
 
   local data
-  data=$(gh api "$endpoint" 2>/dev/null || echo "[]")
+  data=$(gh api "$endpoint" 2> /dev/null || echo "[]")
 
   if [[ "$is_wrapped" == "true" ]]; then
-    data=$(echo "$data" | jq '{comments: .}' 2>/dev/null || echo '{"comments":[]}')
+    data=$(echo "$data" | jq '{comments: .}' 2> /dev/null || echo '{"comments":[]}')
   fi
 
   data=$(filter_coderabbit_addressed_comments "$data" "$is_wrapped")
@@ -94,14 +94,12 @@ fetch_and_filter_data()
   [[ "$is_wrapped" == "true" ]] && count_field=".comments | length"
 
   local count
-  count=$(echo "$data" | jq -r "$count_field" 2>/dev/null || echo "0")
+  count=$(echo "$data" | jq -r "$count_field" 2> /dev/null || echo "0")
   log_debug "$data_name count: $count"
 
   echo "$data"
 }
 
-
-
 # Format file-specific comments grouped by review
 format_grouped_review_comments()
 {
@@ -110,7 +108,7 @@ format_grouped_review_comments()
   local repo="$3"
 
   local count
-  count=$(echo "$review_comments" | jq -r 'length' 2>/dev/null || echo "0")
+  count=$(echo "$review_comments" | jq -r 'length' 2> /dev/null || echo "0")
 
   if [[ "$count" -eq 0 ]]; then
     echo "No file-specific comments found."
@@ -143,7 +141,7 @@ Review ID: \($review.id) - API: gh api /repos/'"$repo"'/pulls/1/reviews/\($revie
 "] | join("")) + "
 ---
 "
-  ' 2>/dev/null || {
+  ' 2> /dev/null || {
     log_debug "Error grouping review comments by review ID"
     echo "Error parsing grouped review comments."
   }
@@ -244,7 +242,7 @@ EOF
 **URL:** \(.url)
 **Number:** '"$pr_number"'
 **Repository:** '"$repo"'
-"' 2>/dev/null || {
+"' 2> /dev/null || {
     echo "**Error:** Could not parse PR information"
     return 1
   }
diff --git a/local/bin/x-ssh-audit b/local/bin/x-ssh-audit
old mode 100644
new mode 100755
index df488a0..5e1a83e
--- a/local/bin/x-ssh-audit
+++ b/local/bin/x-ssh-audit
@@ -350,7 +350,7 @@ ssh_with_retry()
         log_message "INFO" "Trying SSH agent/default authentication"
       fi
 
-      # shellcheck disable=SC2086
+      # shellcheck disable=SC2086,SC2029
       if ssh $ssh_opts "${username}@${host}" "$command" 2> /dev/null; then
         if [ "$try_key" != "NO_KEY" ]; then
           log_message "SUCCESS" "Connected using SSH key: $try_key"
diff --git a/local/bin/x-ssl-expiry-date b/local/bin/x-ssl-expiry-date
index 7073922..f4f0b8d 100755
--- a/local/bin/x-ssl-expiry-date
+++ b/local/bin/x-ssl-expiry-date
@@ -52,17 +52,18 @@ fi
 for name in "$@"; do
 
   # Make a temporary file
-  # Test if we have BSD or GNU version of mktemp
-  if (strings "$(which mktemp)" | grep -q GNU); then
-    # We have the GNU version
-    tmp=$(mktemp)
+  # Try GNU syntax first, fall back to BSD
+  if tmp=$(mktemp 2> /dev/null) && [ -f "$tmp" ]; then
+    # GNU mktemp succeeded
+    :
   else
-    # We have the BSD version
+    # Try BSD syntax
     tmp=$(mktemp -t tmp)
   fi
 
   # Download the certificate
   if (! echo "" | openssl s_client -connect "$name:$port" > "$tmp" 2> /dev/null); then
+    rm -f "$tmp"
     echo "Failed to get cert from https://$name:$port/"
     exit 3
   fi
@@ -74,26 +75,26 @@ for name in "$@"; do
   rm -f "$tmp"
 
   # Convert the expiry date + todays date to seconds-past epoch
-  # Check if we have the BSD or the GNU version of date
-  if (strings "$(which date)" | grep -q GNU); then
-    # We have GNU this is easy
-    then=$(date --date "$date" +%s)
+  # Try GNU syntax first, fall back to BSD
+  if then=$(date --date "$date" +%s 2> /dev/null); then
+    # GNU date succeeded
+    :
   else
-    # We have BSD now it is getting complicated
+    # BSD date requires manual parsing
     year=$(echo "$date" | awk '{print $4}')
     month=$(echo "$date" | awk '{print $1}')
     day=$(echo "$date" | awk '{print $2}')
     hour=$(echo "$date" | awk '{print $3}' | awk -F: '{print $1}')
     minute=$(echo "$date" | awk '{print $3}' | awk -F: '{print $2}')
     second=$(echo "$date" | awk '{print $3}' | awk -F: '{print $3}')
-    then=$(date -v${year}y -v${month} -v${day}d -v${hour}H -v${minute}M -v${second}S -u +%s)
+    then=$(date -v"${year}"y -v"${month}" -v"${day}"d -v"${hour}"H -v"${minute}"M -v"${second}"S -u +%s)
   fi
 
   now=$(date +%s)
 
   # Day diff
   diff=$(("$then" - "$now"))
-  diff=$($diff / 86400)
+  diff=$((diff / 86400))
 
   # All done
   if [ "$days" = "1" ]; then
diff --git a/local/bin/x-term-colors b/local/bin/x-term-colors
index 9820e3e..507d8c6 100755
--- a/local/bin/x-term-colors
+++ b/local/bin/x-term-colors
@@ -24,10 +24,10 @@ resetOutput()
 # ranging between 0 and 255 inclusive
 rainbowColor()
 {
-  let h=$1/43
-  let f=$1-43*$h
-  let t=$f*255/43
-  let q=255-t
+  ((h = $1 / 43))
+  ((f = $1 - 43 * h))
+  ((t = f * 255 / 43))
+  ((q = 255 - t))
 
   if [ $h -eq 0 ]; then
     echo "255 $t 0"
@@ -81,11 +81,13 @@ done
 resetOutput
 
 for i in $(seq 0 127); do
+  # shellcheck disable=SC2046 # Intentional word splitting to pass 3 RGB values as separate args
   setBackgroundColor $(rainbowColor "$i")
   echo -n " "
 done
 resetOutput
 for i in $(seq 255 128); do
+  # shellcheck disable=SC2046 # Intentional word splitting to pass 3 RGB values as separate args
   setBackgroundColor $(rainbowColor "$i")
   echo -n " "
 done
diff --git a/local/bin/x-thumbgen b/local/bin/x-thumbgen
index edc5f2a..683b860 100755
--- a/local/bin/x-thumbgen
+++ b/local/bin/x-thumbgen
@@ -126,8 +126,8 @@ parse_options()
 # Generate thumbnails recursively using find and filtering by MIME type
 generate_thumbnails()
 {
-  local source_dir=$1
-  local output_dir=$2
+  local source_dir="$1"
+  local output_dir="$2"
 
   # Ensure the output directory exists (create if necessary)
   if [ ! -d "$output_dir" ]; then
@@ -144,7 +144,7 @@ generate_thumbnails()
     fi
 
     # Determine the relative path with respect to the source directory.
-    rel_path="${file#$source_dir/}"
+    rel_path="${file#"$source_dir"/}"
     dir="$(dirname "$rel_path")"
     base="$(basename "$rel_path")"
     filename="${base%.*}"
diff --git a/package.json b/package.json
index 4bcd96c..c0255f1 100644
--- a/package.json
+++ b/package.json
@@ -6,14 +6,13 @@
     "doc": "docs"
   },
   "scripts": {
-    "lint:markdown": "markdownlint -d .",
-    "fix:markdown": "markdownlint -df .",
-    "lint:prettier": "prettier . --check",
-    "fix:prettier": "prettier . --write",
+    "lint:biome": "biome check .",
+    "fix:biome": "biome check --write .",
+    "format": "biome format --write .",
     "test": "bash test-all.sh",
     "lint:ec": "ec -f gcc",
-    "lint": "yarn lint:markdown && yarn lint:prettier && yarn lint:ec",
-    "fix": "yarn fix:markdown && yarn fix:prettier"
+    "lint": "yarn lint:biome && yarn lint:ec",
+    "fix": "yarn fix:biome"
   },
   "repository": {
     "type": "git",
@@ -30,13 +29,11 @@
   },
   "homepage": "https://github.com/ivuorinen/dotfiles#readme",
   "devDependencies": {
-    "@ivuorinen/base-configs": "1.0.0",
-    "@types/node": "^24.10.1",
-    "bats": "^1.13.0",
-    "editorconfig-checker": "^6.1.1",
-    "markdownlint": "^0.40.0",
-    "prettier": "^3.7.4",
-    "typescript": "^5.9.3"
+    "@biomejs/biome": "^2.3.1",
+    "@types/node": "^24.0.1",
+    "bats": "^1.12.0",
+    "editorconfig-checker": "^6.1.0",
+    "typescript": "^5.8.3"
   },
   "packageManager": "yarn@4.12.0"
 }
diff --git a/yarn.lock b/yarn.lock
index 8d1b578..81af95f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5,178 +5,122 @@ __metadata:
   version: 8
   cacheKey: 10c0
 
-"@ivuorinen/base-configs@npm:1.0.0":
-  version: 1.0.0
-  resolution: "@ivuorinen/base-configs@npm:1.0.0"
-  checksum: 10c0/399e36bb7352b9e2ad3d91a5632a312670349d7e0976336c6fe113137c6b8c97d92b0b3b05bbe26ea8b533d27406162a5d42889019d27657efe7f08dbb54d820
-  languageName: node
-  linkType: hard
-
-"@types/debug@npm:^4.0.0":
-  version: 4.1.12
-  resolution: "@types/debug@npm:4.1.12"
+"@biomejs/biome@npm:^2.3.1":
+  version: 2.3.1
+  resolution: "@biomejs/biome@npm:2.3.1"
   dependencies:
-    "@types/ms": "npm:*"
-  checksum: 10c0/5dcd465edbb5a7f226e9a5efd1f399c6172407ef5840686b73e3608ce135eeca54ae8037dcd9f16bdb2768ac74925b820a8b9ecc588a58ca09eca6acabe33e2f
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