Getting error No LSP server available for this file type.

[gulshan216]

Description

I am trying to get LSP working for my repository with opencode. I have clangd and pyright server setup as follows in my opencode.json

"lsp": {
    "python": {
      "command": [
        "pyright-langserver",
        "--stdio"
      ],
      "extensions": [
        ".py"
      ]
    },
    "cpp": {
      "command": [
        "<custom-script-running-clangd-with-some-extra-args>",
        "--background-index"
      ],
      "extensions": [
        ".c",
        ".h",
        ".cpp",
        ".cxx",
        ".cc",
        ".hh",
        ".inl",
        ".hpp",
        ".hxx"
      ]
    }
  },

I am seeing a couple of issues:

1. Without OPENCODE_EXPERIMENTAL_LSP_TOOL=true explicitly set when running opencode, the agent never tries to use LSP tools and always defaults to grep
2. With OPENCODE_EXPERIMENTAL_LSP_TOOL=true, the agent tries to use LSP tools but always fails
   Example prompt:

Find abc symbol, its implementation and references

Example response

⚙ lsp [operation=workspaceSymbol, filePath=<workspace-root-directory>, line=1, character=1, query=abc]
No LSP server available for this file type.

I wonder why filePath being set to workspace root directory in the LSP query and if thats causes what is causing the issue. I have similar server setup with Copilot CLI under .github/lsp.json and don't see it specifying a filePath for a similar prompt and it doesn't have any issues searching the symbol through LSP tools

Plugins

No response

OpenCode version

1.15.12

Steps to reproduce

1. Replicate the opencode.json as above
2. OPENCODE_EXPERIMENTAL_LSP_TOOL=true opencode
3. Prompt to find any python / cpp symbol, its implementation and references

Screenshot and/or share link

No response

Operating System

Ubuntu 24.04.4 LTS

Terminal

VSCode terminal

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• debug lsp symbols and /find/symbol do not bootstrap LSP; document-symbols sends request before document open #29111: Investigates the same root cause — workspaceSymbol and /find/symbol do not bootstrap an LSP client, leading to the exact "No LSP server available for this file type." error. That issue also specifically covers clangd and includes a binary-level analysis confirming the behavior.
• LSP do not work with clangd (c++) #22624: Related — clangd LSP not working for symbol search when files haven't been opened first.

Please review those issues and consider closing this one as a duplicate if they cover your case.

[gulshan216]

Without OPENCODE_EXPERIMENTAL_LSP_TOOL=true explicitly set when running opencode, the agent never tries to use LSP tools and always defaults to grep

The first issue i mentioned is definitely not part of those other existing issues

With OPENCODE_EXPERIMENTAL_LSP_TOOL=true, the agent tries to use LSP tools but always fails

The second issue does seem to have some overlap with #29111 but not sure if it boils down to the same root cause as mine, so would like to keep open until the other one is resolved and we can verify the same issue doesn't exist for the workflow i described above