feat: deno lsp

[hugiex]

Add Deno LSP Support

Summary

Adds Deno LSP server support with mutual exclusion from TypeScript LSP to prevent conflicting diagnostics.

Changes

• Added Deno LSP: Detects deno.json/deno.jsonc, supports .ts, .tsx, .js, .jsx, .mjs
• Enhanced NearestRoot: Added optional excludePatterns parameter
• Updated TypeScript LSP: Excludes itself when Deno markers are found

Behavior

• Deno projects (deno.json present) → Deno LSP only
• Node/Bun projects (package-lock.json, etc.) → TypeScript LSP only
• No conflicts - single LSP per file

Requirements

• Deno CLI must be pre-installed (like TypeScript)
• Uses built-in deno lsp command

Testing

Deno Project

LSP Attachment Log - filtered log on a folder that contain a deno.json file

INFO  2025-10-16T09:45:44 +2ms service=lsp serverIds=deno, typescript, vue, eslint, gopls, ruby-lsp, pyright, elixir-ls, zls, csharp, rust, clangd, svelte, jdtls enabled LSP servers
INFO  2025-10-16T09:47:03 +5ms service=lsp serverID=deno spawned lsp server
INFO  2025-10-16T09:47:03 +0ms service=lsp.client serverID=deno starting client
INFO  2025-10-16T09:47:03 +2ms service=lsp.client serverID=deno sending initialize
INFO  2025-10-16T09:47:03 +21ms service=lsp.client serverID=deno initialized
INFO  2025-10-16T09:47:03 +3ms service=lsp.client serverID=deno  textDocument/didOpen
INFO  2025-10-16T09:47:04 +410ms service=lsp.client serverID=deno  textDocument/publishDiagnostics
INFO  2025-10-16T09:47:20 +1ms service=lsp.client serverID=deno  waiting for diagnostics
INFO  2025-10-16T09:47:20 +0ms service=lsp.client serverID=deno  version=1 textDocument/didChange
INFO  2025-10-16T09:47:20 +11ms service=lsp.client serverID=deno  textDocument/publishDiagnostics
INFO  2025-10-16T09:47:20 +0ms service=lsp.client serverID=deno  got diagnostics

[rekram1-node]

Do you mind documenting it in lsp.mdx too?

[rekram1-node]

/oc read lsp.mdx use docs agent to update it to include a reference for deno lsp

[opencode-agent]

Perfect! I've updated the lsp.mdx file to include Deno LSP support. The changes include:

1. Added Deno LSP to the built-in servers table with:

   • Extensions: .ts, .tsx, .js, .jsx, .mjs
   • Requirements: deno command available (auto-detects deno.json/deno.jsonc)

2. Added a note explaining the mutual exclusion behavior between Deno and TypeScript LSP servers, clarifying that Deno LSP takes precedence when deno.json/deno.jsonc files are detected.

The documentation now properly reflects the Deno LSP support that was added in the pull request.

opencode session  |  github run

[rekram1-node]

/oc remove the tip / note

[opencode-agent]

Done! I've removed the Deno LSP precedence note from the documentation.

opencode session  |  github run

[hugiex]

Sorry for the late response — probably because of the time zone difference. Btw, many thanks for updating the doc 🥰

[rekram1-node]

hey no probs, I was testing to see if it would work hahaga