[QUESTION] Usage in monorepo

[raine]

I run claude code in the root of my monorepo and got this when trying to find references for something.

My monorepo root package.json does not have TypeScript as a dependency.

What should be done?

⏺ cclsp:find_references (MCP)(file_path: "/Users/raine/code/langlearn/web/src/components/Sessio
                             nSummaryOverlay.tsx", symbol_name: "SessionSummaryOverlay",
                             include_declaration: true)
  ⎿ Error: Request initialize failed with message: Could not find a valid TypeScript installati
    on. Please ensure that the "typescript" dependency is installed in the workspace or that a
    valid `tsserver.path` is specified. Exiting.

[ktnyt]

This seems to me like a case that I haven't been able to get around to trying with the LSP setup.
Configuring $PROJECT_ROOT/.claude/cclsp.json to point to a global TypeScript Language Server executable should hopefully fix this.
In the meanwhile I'll try to reproduce this myself in a monorepo and see what I can do from a tool standpoint.

[maschwenk]

I was able to fix by installing as a root level package.json depenedency, but then everything broke after that. I was also trying to get the Typescript Go LSP working but had a bunch of trouble there.

[ktnyt]

Hmm there seems to be an issue that I'm not aware of lurking somewhere.
I wasn't aware there was a Go version of the Typescript LSP. I'll have to try it out myself.

[ktnyt]

OK confirmed something is awry when configured with tsgo lsp --stdio.

[ktnyt]

Just a heads up: I'm probably going to have to dive a bit deep into this since it seems that the tsgo lsp isn't emitting any sort of error message.

[patrykk21]

By creating even a very obvious error in a file in a monorepo fully configured with tsconfig and what not (other IDEs are showing errors), cclsp no matter how I configure it and what LSP I use, it willl always return no diagnostics (meaning no errors)

[patrykk21]

Actually it doesn't work anywhere for me.

interface User {
  name: string;
  age: number;
}

function greetUser(user: User): string {
  // Type mismatch - returning number instead of string
  return user.age;
}

// Missing type annotation
function calculateAge(birthYear) {
  return 2024 - birthYear;
}

// Using undefined variable
function processData() {
  console.log(undefinedVariable);
}

// Wrong property access
const user: User = {
  name: "John",
  age: 30
};

// Accessing non-existent property
console.log(user.email);

// Type mismatch in assignment
let count: number = "hello";

// Function with wrong return type
function getNumbers(): number[] {
  return "not an array";
}

// Missing semicolon and syntax error
const broken = {
  prop1: "value1"
  prop2: "value2"
}

// Using unknown type
let mystery: SomeUnknownType = "test";

Claude code running LSP

⏺ cclsp - get_diagnostics (MCP)(file_path: "/Users/vigenerr/test-errors.ts")
  ⎿  No diagnostics found for /Users/vigenerr/test-errors.ts. The file has no errors, warnings, or hints.

[ravshansbox]

Won't this cclsp.json solve the problem?

{
  "servers": [
    {
      "extensions": ["js", "ts", "jsx", "tsx"],
      "command": ["npx", "--", "typescript-language-server", "--stdio"],
      "rootDir": "packages/app1"
    },
    {
      "extensions": ["js", "ts", "jsx", "tsx"],
      "command": ["npx", "--", "typescript-language-server", "--stdio"],
      "rootDir": "packages/app2"
    }
  ]
}