Problem

For feature requests such as #52846 or any improved refactoring UX, VS Code needs to know all the code actions that are available for a language. Some information about available code actions is provided by CodeActionProviderMetadata but only if an extension has been activated and the provider has been registered

Proposal

To support this, we likely want a new contribution point that lets extensions statically tell us about the general classes of the code actions that they provide:

{
  "contributions": {
    "codeActions": [
      {
        "languages": [
          "javascript",
          "javascriptreact",
          "typescript",
          "typescriptreact"
        ],
        "actions": [
          {
            "kind": "refactor.extract.constant",
            "title": "Extract constant",
            "description": "Extract expression to a constant."
          }
        ]
      }
    ]
  }
}

Potential use cases for this info

• Show on the extension's contribution page Show contributed code actions in extensions view #84091
• IntelliSense for codeActionsOnSave (c8d64b1)
• IntelliSense for configuring refactors in the keybinding json editor Code action intellisense in the keybindings JSON editor #84033
• IntelliSense for configuring refactors in UI keybinding editor Allow viewing and editing commands with 'args' in the keybindings editor #84072
• Improving the refactor context menu in VS Code

/cc @kieferrm