diff --git a/cursor/.gitignore b/cursor/.gitignore
new file mode 100644
index 0000000..6e50e12
--- /dev/null
+++ b/cursor/.gitignore
@@ -0,0 +1 @@
+./cache/
diff --git a/cursor/extensions.lock b/cursor/extensions.lock
new file mode 100644
index 0000000..398fddb
--- /dev/null
+++ b/cursor/extensions.lock
@@ -0,0 +1,61 @@
+# Cursor Extensions
+# Generated on Fri Feb 21 18:59:21 GMT 2025
+
+alefragnani.project-manager@12.8.0
+antiantisepticeye.vscode-color-picker@0.0.4
+antyos.openscad@1.3.2
+arahata.linter-actionlint@0.1.0
+bibhasdn.unique-lines@1.0.0
+bodil.file-browser@0.2.11
+bufbuild.vscode-buf@0.7.0
+carlos-algms.make-task-provider@2.5.1
+christian-kohler.path-intellisense@2.10.0
+connorshea.vscode-ruby-test-adapter@0.9.2
+connorshea.vscode-test-explorer-status-bar@1.2.0
+ctf0.macros@1.1.1
+dnut.rewrap-revived@1.16.3
+exiasr.hadolint@1.1.2
+fnando.linter@0.0.19
+foxundermoon.shell-format@7.2.5
+github.remotehub@0.64.0
+github.vscode-github-actions@0.27.1
+github.vscode-pull-request-github@0.102.0
+gofenix.go-lines@0.0.10
+golang.go@0.44.0
+gruntfuggly.todo-tree@0.0.226
+hashicorp.terraform@2.34.3
+hbenl.vscode-test-explorer@2.22.1
+humao.rest-client@0.25.1
+kahole.magit@0.6.66
+karunamurti.haml@1.4.1
+m4ns0ur.base64@1.0.0
+mhutchie.git-graph@1.30.0
+ms-azuretools.vscode-docker@1.29.4
+ms-vscode-remote.remote-containers@0.394.0
+ms-vscode-remote.remote-ssh@0.113.1
+ms-vscode-remote.remote-ssh-edit@0.87.0
+ms-vscode.hexeditor@1.11.1
+ms-vscode.remote-explorer@0.4.3
+ms-vscode.remote-repositories@0.42.0
+ms-vscode.remote-server@1.5.2
+ms-vscode.test-adapter-converter@0.2.1
+ms-vscode.vscode-speech@0.12.1
+ms-vsliveshare.vsliveshare@1.0.5948
+ninoseki.vscode-gem-lens@0.4.3
+pflannery.vscode-versionlens@1.16.2
+pkief.material-icon-theme@5.19.0
+redhat.vscode-xml@0.27.2
+redhat.vscode-yaml@1.16.0
+rrudi.vscode-dired@0.0.9
+rust-lang.rust-analyzer@0.3.2308
+shopify.ruby-extensions-pack@0.1.12
+shopify.ruby-lsp@0.9.6
+sorbet.sorbet-vscode-extension@0.3.37
+sumneko.lua@3.13.6
+swellaby.vscode-rust-test-adapter@0.11.0
+tamasfe.even-better-toml@0.21.2
+tuttieee.emacs-mcx@0.65.1
+viktorzetterstrom.non-breaking-space-highlighter@0.0.3
+wenhoujx.swiper@2.1.2
+zhuangtongfa.material-theme@3.19.0
+zxh404.vscode-proto3@0.5.5
diff --git a/cursor/extensions.txt b/cursor/extensions.txt
deleted file mode 100644
index 1de095f..0000000
--- a/cursor/extensions.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-# Cursor Extensions
-# Generated on Wed Feb 19 19:29:16 GMT 2025
-
-alefragnani.project-manager
-antiantisepticeye.vscode-color-picker
-arahata.linter-actionlint
-bibhasdn.unique-lines
-bodil.file-browser
-carlos-algms.make-task-provider
-connorshea.vscode-ruby-test-adapter
-ctf0.macros
-dnut.rewrap-revived
-efbenson.scad
-fnando.linter
-foxundermoon.shell-format
-github.remotehub
-github.vscode-github-actions
-github.vscode-pull-request-github
-gofenix.go-lines
-golang.go
-gruntfuggly.todo-tree
-hbenl.vscode-test-explorer
-kahole.magit
-karunamurti.haml
-ms-azuretools.vscode-docker
-ms-kubernetes-tools.vscode-kubernetes-tools
-ms-vscode-remote.remote-containers
-ms-vscode.remote-repositories
-ms-vscode.test-adapter-converter
-redhat.vscode-yaml
-rrudi.vscode-dired
-rust-lang.rust-analyzer
-shan.code-settings-sync
-shopify.ruby-extensions-pack
-shopify.ruby-lsp
-sorbet.sorbet-vscode-extension
-sumneko.lua
-swellaby.vscode-rust-test-adapter
-tamasfe.even-better-toml
-tuttieee.emacs-mcx
-viktorzetterstrom.non-breaking-space-highlighter
-wenhoujx.swiper
-zhuangtongfa.material-theme
diff --git a/cursor/setup.sh b/cursor/setup.sh
index 1cb164f..15b8b6f 100755
--- a/cursor/setup.sh
+++ b/cursor/setup.sh
@@ -14,6 +14,9 @@ CONFIG_SOURCES=(
 # Detect current script directory.
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
+# Extensions lockfile path
+EXTENSIONS_LOCK="${SCRIPT_DIR}/extensions.lock"
+
 # ==============================================================================
 # Help
 # ==============================================================================
@@ -116,11 +119,10 @@ find_cursor_cmd() {
   echo "${cursor_cmd}"
 }
 
-# Dump installed extensions to extensions.txt
+# Dump installed extensions to extensions.lock
 do_dump_extensions() {
   local cursor_cmd
   cursor_cmd="$(find_cursor_cmd)"
-  local extensions_file="${SCRIPT_DIR}/extensions.txt"
   local current_date
   current_date="$(date)"
 
@@ -128,31 +130,102 @@ do_dump_extensions() {
     echo "# Cursor Extensions"
     echo "# Generated on ${current_date}"
     echo
-    "${cursor_cmd}" --list-extensions
-  } >"${extensions_file}"
+    "${cursor_cmd}" --list-extensions --show-versions
+  } >"${EXTENSIONS_LOCK}"
 
-  echo "Extensions list dumped to ${extensions_file}"
+  echo "Extensions list dumped to ${EXTENSIONS_LOCK}"
 }
 
-# Install extensions from extensions.txt
+# Global variable to cache installed extensions
+_INSTALLED_EXTENSIONS=""
+
+# Check if extension is already installed with exact version
+is_extension_installed() {
+  local cursor_cmd="$1"
+  local extension="$2"
+  local version="$3"
+
+  # Build cache if not already built
+  if [[ -z "${_INSTALLED_EXTENSIONS}" ]]; then
+    _INSTALLED_EXTENSIONS="$("${cursor_cmd}" --list-extensions --show-versions)"
+  fi
+
+  # Check if extension@version exists in cached list
+  echo "${_INSTALLED_EXTENSIONS}" | grep -q "^${extension}@${version}$"
+}
+
+# Download and install a single extension.
+#
+# This is needed for cursor right now as installing an extension based on its
+# ID yields a signature error. But installing from a .vsix file works fine.
+download_and_install_extension() {
+  local cursor_cmd="$1"
+  local extension="$2"
+  local version="$3"
+  local extensions_dir="$4"
+
+  # Check if already installed with correct version
+  if is_extension_installed "${cursor_cmd}" "${extension}" "${version}"; then
+    echo "Extension ${extension}@${version} is already installed, skipping"
+    return 0
+  fi
+
+  local vsix_path="${extensions_dir}/${extension}@${version}.vsix"
+
+  # Create extensions directory if it doesn't exist
+  mkdir -p "${extensions_dir}"
+
+  # If .vsix doesn't exist, download it
+  if [[ ! -f "${vsix_path}" ]]; then
+    local publisher_id="${extension%%.*}"
+    local extension_id="${extension#*.}"
+    local vsix_url="https://marketplace.visualstudio.com/_apis/public/gallery/publishers/${publisher_id}/vsextensions/${extension_id}/${version}/vspackage"
+
+    echo "Downloading ${extension}@${version}.vsix..."
+    echo "  - URL: ${vsix_url}"
+    if ! curl --compressed -L -o "${vsix_path}" "${vsix_url}"; then
+      echo "Failed to download ${extension}@${version}.vsix"
+      return 1
+    fi
+  fi
+
+  # Install the extension from .vsix file
+  echo "Installing extension from ${vsix_path}"
+  if ! "${cursor_cmd}" --install-extension "${vsix_path}"; then
+    echo "Failed to install ${extension}@${version}"
+    return 1
+  fi
+
+  # Clean up the .vsix file after successful installation
+  rm "${vsix_path}"
+  return 0
+}
+
+# Install extensions from extensions.lock
 do_install_extensions() {
   local cursor_cmd
   cursor_cmd="$(find_cursor_cmd)"
-  local extensions_file="${SCRIPT_DIR}/extensions.txt"
+  local extensions_dir="${SCRIPT_DIR}/cache/extensions"
 
-  if [[ ! -f "${extensions_file}" ]]; then
-    echo "Error: ${extensions_file} not found"
+  if [[ ! -f "${EXTENSIONS_LOCK}" ]]; then
+    echo "Error: ${EXTENSIONS_LOCK} not found"
     exit 1
   fi
 
-  # Read extensions file, skip comments and empty lines
+  # Process each extension
   while IFS= read -r line; do
     if [[ -n "${line}" && ! "${line}" =~ ^[[:space:]]*# ]]; then
-      echo "Installing extension: ${line}"
-      "${cursor_cmd}" --install-extension "${line}"
-    fi
-  done <"${extensions_file}"
+      extension="${line%@*}"
+      version="${line#*@}"
 
+      if ! download_and_install_extension "${cursor_cmd}" "${extension}" "${version}" "${extensions_dir}"; then
+        echo "Warning: Failed to install ${extension}@${version}"
+      fi
+    fi
+  done <"${EXTENSIONS_LOCK}"
+
+  # Clean up extensions directory if empty
+  rmdir "${extensions_dir}" 2>/dev/null || true
   echo "Extensions installation complete!"
 }