[BUG]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I have tried to enable LSP tools and installed 2 (pyright and typescript) as plugins from the ofiicial marketplace. I start claude with both

• ENABLE_LSP_TOOL=1 / ENABLE_LSP_TOOLS=1 set
• pyright-lsp@claude-plugins-official plugin installed and enabled
• pyright-langserver in PATH
• LSP tool returns "No LSP server available for file type: .py"

Claude verified all of these are accessible in session.

Not sure if it matters but I also launch with --dangerously-skip-permissions

What Should Happen?

Claude should be able to perform LSP operations on .py files.

Error Messages/Logs

Steps to Reproduce

Environment

• macOS Darwin 24.6.0
• Claude Code with Opus 4.5
• Node v22.15.0
• pyright 1.1.407

Configuration Verified

1. Environment variables set:

ENABLE_LSP_TOOL=1
ENABLE_LSP_TOOLS=1

1. Plugin enabled in ~/.claude/settings.json:

"enabledPlugins": {
"pyright-lsp@claude-plugins-official": true
}

1. Plugin installed in ~/.claude/plugins/installed_plugins.json:

{
"pyright-lsp@claude-plugins-official": [{
"scope": "user",
"installPath": "~/.claude/plugins/cache/claude-plugins-official/pyright-lsp/1.0.0",
"version": "1.0.0",
"isLocal": true
}]
}

1. Binary available in PATH:

$ which pyright-langserver
/Users/david/.nvm/versions/node/v22.15.0/bin/pyright-langserver

1. Marketplace plugin definition correct (in ~/.claude/plugins/marketplaces/claude-plugins-official/.claude-plugin/marketplace.json):

{
"name": "pyright-lsp",
"lspServers": {
"pyright": {
"command": "pyright-langserver",
"args": ["--stdio"],
"extensionToLanguage": {
".py": "python",
".pyi": "python"
}
}
}
}

Steps Taken

1. Confirmed LSP tool returns "No LSP server available for file type: .py"
2. Discovered pyright wasn't installed → installed via npm install -g pyright
3. Restarted Claude Code
4. Still didn't work
5. Added ENABLE_LSP_TOOLS=1 (plural) in addition to singular
6. Restarted Claude Code
7. Still didn't work
8. Cleared plugin cache: rm -rf ~/.claude/plugins/cache/claude-plugins-official
9. Reinstalled plugin via /plugin install pyright-lsp@claude-plugins-official
10. Restarted Claude Code
11. Still returns "No LSP server available for file type: .py"

Expected Behavior

LSP tool should connect to pyright-langserver and return code intelligence data.

Actual Behavior

LSP tool returns "No LSP server available for file type: .py" despite all configuration being correct.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

v2.0.76

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_