Cursor Extension Integration Skill

Cursor Extension Integration

Integrate VS Code extensions with Cursor IDE. Covers the Open VSX Registry, VSIX installation for Microsoft-exclusive extensions, conflict resolution with AI features, and recommended extension stacks.

Extension Marketplace: Key Difference from VS Code

Cursor uses the Open VSX Registry instead of Microsoft's VS Code Marketplace. This is because Microsoft's marketplace terms restrict access to VS Code products only.

Impact: Most popular extensions are on Open VSX. Some Microsoft-published extensions are not.

Available on Open VSX (works directly)

| Extension | Category | |-----------|----------| | ESLint | Linting | | Prettier | Formatting | | GitLens | Git visualization | | Docker | Container management | | Python | Python language support | | Pylance | Python analysis (community build) | | Go | Go language support | | Rust Analyzer | Rust language support | | Tailwind CSS IntelliSense | CSS utilities | | Auto Rename Tag | HTML/JSX editing | | Error Lens | Inline error display | | TODO Highlight | Comment highlighting | | Thunder Client | API testing |

NOT Available on Open VSX (need manual install)

| Extension | Reason | Workaround | |-----------|--------|------------| | GitHub Copilot | Microsoft exclusive | Use Cursor's built-in AI (better integration) | | Live Share | Microsoft exclusive | Use other collaboration tools | | Remote - SSH | Microsoft exclusive | Install via VSIX | | C# Dev Kit | Microsoft exclusive | Install via VSIX | | IntelliCode | Microsoft exclusive | Cursor's Tab replaces this |

Installing Extensions

From Open VSX (In-App)

Cmd+Shift+X → search extension name → Install

From VSIX (Manual)

For extensions not on Open VSX:

Go to the VS Code Marketplace website: marketplace.visualstudio.com
Find the extension page
Click "Download Extension" (downloads .vsix file)
In Cursor: Cmd+Shift+P > Extensions: Install from VSIX...
Select the downloaded .vsix file

From Command Line

# Install from Open VSX
cursor --install-extension dbaeumer.vscode-eslint

# Install from VSIX file
cursor --install-extension ~/Downloads/extension.vsix

# List installed extensions
cursor --list-extensions

# Uninstall
cursor --uninstall-extension dbaeumer.vscode-eslint

Conflict Resolution with Cursor AI

Extensions That Conflict with Cursor

| Extension | Conflict | Resolution | |-----------|----------|------------| | GitHub Copilot | Duplicate Tab/ghost text suggestions | Disable Copilot. Cursor's built-in AI is better integrated | | TabNine | Duplicate inline completions | Disable TabNine | | Codeium | Duplicate inline completions | Disable Codeium | | IntelliCode | Duplicate completions | Disable IntelliCode | | Vim | Ctrl+K/L/I keybinding conflicts | Remap AI shortcuts (see below) |

Vim Extension Conflict Resolution

// keybindings.json
[
  {
    "key": "ctrl+l",
    "command": "aichat.focus",
    "when": "!vim.active || vim.mode == 'Normal'"
  },
  {
    "key": "ctrl+k",
    "command": "cursor.edit",
    "when": "editorTextFocus && vim.mode == 'Normal'"
  },
  {
    "key": "ctrl+i",
    "command": "composer.open",
    "when": "!vim.active || vim.mode == 'Normal'"
  }
]

General Keybinding Conflict Check

Cmd+K Cmd+S > search for the conflicting shortcut > see which commands are bound > reassign or disable.

Recommended Extension Stacks

JavaScript / TypeScript

Required:
  dbaeumer.vscode-eslint          # Linting
  esbenp.prettier-vscode          # Formatting
  bradlc.vscode-tailwindcss       # Tailwind CSS (if using)

Recommended:
  formulahendry.auto-rename-tag   # HTML/JSX tag renaming
  usernamehw.errorlens            # Inline error display
  wix.vscode-import-cost          # Import size display
  christian-kohler.path-intellisense  # Path autocomplete

Python

Required:
  ms-python.python                # Python language support
  charliermarsh.ruff              # Fast Python linter

Recommended:
  ms-python.debugpy               # Python debugger
  njpwerner.autodocstring         # Docstring generator
  ms-toolsai.jupyter              # Jupyter notebook support

Go / Rust

Go:
  golang.go                       # Official Go extension

Rust:
  rust-lang.rust-analyzer         # Rust language server
  tamasfe.even-better-toml        # TOML config files

DevOps

  ms-azuretools.vscode-docker     # Docker support
  redhat.vscode-yaml              # YAML validation
  hashicorp.terraform             # Terraform HCL support
  ms-kubernetes-tools.vscode-kubernetes-tools  # Kubernetes

Performance Impact

Extensions affect editor performance. Audit regularly:

Measuring Extension Impact

Cmd+Shift+P > Developer: Show Running Extensions
Sort by activation time or profile time
Disable extensions with high activation times that you rarely use

Common Performance Offenders

| Extension | Issue | Fix | |-----------|-------|-----| | GitLens | High CPU on large repos | Disable for repos > 100K commits | | Prettier (on save) | Slow on large files | Configure file size limit | | TypeScript | High memory on large projects | Increase tsserver.maxTsServerMemory | | Spell checker | CPU on large files | Exclude generated files |

Disabling Extensions Per Workspace

// .vscode/settings.json (per project)
{
  "extensions.ignoreRecommendations": true
}

Or right-click an extension > Disable (Workspace) to disable only for the current project.

Extension Settings Sync

Cursor does not sync extensions between machines automatically like VS Code Settings Sync. To transfer:

# Export extension list
cursor --list-extensions > cursor-extensions.txt

# On new machine, reinstall all
while read ext; do cursor --install-extension "$ext"; done < cursor-extensions.txt

Enterprise Considerations

Extension allow/deny lists: No built-in mechanism in Cursor. Enforce via documentation and team policy.
VSIX vetting: Review VSIX files before distributing to team (check for telemetry, network calls)
Open VSX vs Marketplace: Some extensions have different publishers on Open VSX. Verify publisher identity.
Extension updates: Extensions auto-update from Open VSX. VSIX-installed extensions do NOT auto-update.

Resources

Cursor Extensions Documentation
Open VSX Registry
VS Code Marketplace (for VSIX downloads)

Agent Skills: Cursor Extension Integration

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Skill Files