Official LSP plugins install with no LSP config — why and how to fix

Question

In Claude Code 2.1.246 and 2.1.288 on macOS arm64, installing official LSP plugins (typescript-lsp, pyright-lsp, swift-lsp, etc.) leaves the cached plugin with no .lsp.json and no lspServers in plugin.json. Claude Code reports "No LSP server available for file type: .ts" or "getAllLspServers returned 0 server(s)". Why is that, and what config change makes them work?

Originally asked on GitHub: https://github.com/anthropics/claude-plugins-official/issues/379

AgentArmor team · Accepted Answer

This is still open. It reproduces through Claude Code 2.1.288 (reported 2026-10-06) and was tested on 2.1.246 (2026-08-26). All 11 official `*-lsp` plugins are affected.

Root cause: the LSP server definitions live only in `.claude-plugin/marketplace.json` under `lspServers` (for example, the `gopls` entry at marketplace.json#L916-L923). When Claude Code installs a plugin it copies the plugin directory into the cache, but it does not propagate that `lspServers` block into the installed plugin. Newer installs ship `.claude-plugin/plugin.json`, but it only contains `name`/`description`/`version`/`author`, so `getAllLspServers` returns 0 servers.

Workaround confirmed in the thread: add `lspServers` directly to the cached plugin's `.claude-plugin/plugin.json`. For `swift-lsp`, the tested path is `~/.claude/plugins/cache/claude-plugins-official/swift-lsp/1.0.0/.claude-plugin/plugin.json`, and the tested config is:

```json
{
  "name": "swift-lsp",
  "description": "Swift language server (SourceKit-LSP) for code intelligence",
  "version": "1.0.0",
  "author": {
    "name": "Anthropic",
    "email": "support@anthropic.com"
  },
  "lspServers": {
    "sourcekit-lsp": {
      "command": "sourcekit-lsp",
      "extensionToLanguage": {
        ".swift": "swift"
      }
    }
  }
}
```

On 2.1.246, a user verified both this `plugin.json` shape and adding a `.lsp.json` file at the plugin root work for rust-analyzer, pyright, and typescript. Another reporter found the cached `plugin.json` is regularly overwritten, so the edit may need to be re-applied. An older suggestion was to set `ENABLE_LSP_TOOL=1`, but a 2.1.286 reporter said that flag was no longer needed. Tracking issue: anthropics/claude-code#15148. The fix PR #378 in claude-plugins-official is closed.

AgentArmor team · Answer

**What @lib-cf tried on GitHub** (Worked)

Edited the cached swift-lsp plugin's .claude-plugin/plugin.json to add an lspServers object with sourcekit-lsp, and the Swift LSP worked again.

Source: https://github.com/anthropics/claude-plugins-official/issues/379#issuecomment-5963204545

AgentArmor team · Answer

**What @laurigates tried on GitHub** (Worked)

On Claude Code 2.1.246, tested both adding lspServers to .claude-plugin/plugin.json and adding a .lsp.json file at the plugin root for rust-analyzer, pyright, and typescript; both shapes registered servers.

Source: https://github.com/anthropics/claude-plugins-official/issues/379#issuecomment-5424160629

AgentArmor team · Answer

**What @JPyke3 tried on GitHub** (Didn't work)

Checked several machines after installing official LSP plugins; every cached plugin directory contained only a README and no LSP config, and the problem persisted.

Source: https://github.com/anthropics/claude-plugins-official/issues/379#issuecomment-3906144011

AgentArmor team · Answer

**What @rwalle tried on GitHub** (Outcome unclear)

Suggested setting the ENABLE_LSP_TOOL=1 flag, referencing a claude-code issue comment. Not directly confirmed in this thread, and a later 2.1.286 report said the flag was no longer needed.

Source: https://github.com/anthropics/claude-plugins-official/issues/379#issuecomment-4236492308

Official LSP plugins install with no LSP config — why and how to fix

5 answers

Add your answer or comment

Official LSP plugins install with no LSP config — why and how to fix

5 answers

Add your answer or comment

Related questions