How to use?

[Yevgnen]

Do I need any setup for it? I don't see any lints on a Python file, thought it does work on a Rust file.

Python:

Rust:

[Stef16Robbe]

Hi, that's strange. For me it does work. MacOS, latest version of Zed, reinstalled the extension from fresh without any configuration:

Do you have any special configuration on your end that you are aware of? You can also try checking out Zed's logs (Open command palate > zed: open log)

[hippietrail]

Could it be some kind of conflict with a Python LSP?

[Yevgnen]

I don't see anything logs about harper and I have the following config for Python.

  "languages": {
    "Python": {
      "language_servers": ["basedpyright", "ruff", "!pyright"],
      "format_on_save": "on",
      "formatter": [
        {
          "code_actions": {
            "source.organizeImports.ruff": true,
            "source.fixAll.ruff": true
          }
        },
        {
          "language_server": {
            "name": "ruff"
          }
        }
      ]
    }
  }

[Stef16Robbe]

Interesting, I have exactly the same settings 😄

[Yevgnen]

It only works if I remove the whole "Python" values. Remove items from "language_servers" or tuning the items to be enabled or disabled also dose not work.

[rushter]

I had the same problem, harper-ls should be included to the list of language servers.

[lbrndnr]

Also struggling to get this working with latex. Removing both the languages and lsp keys in the settings did not help. For rust files it works flawlessly. Adding harper-ls does not help, unfortunately. Here's my settings file:

{
  "features": {
    "edit_prediction_provider": "zed"
  },
  "agent": {
    "always_allow_tool_actions": true,
    "default_model": {
      "provider": "zed.dev",
      "model": "claude-sonnet-4"
    }
  },
  "ui_font_size": 16,
  "buffer_font_size": 13,
  "theme": {
    "mode": "system",
    "light": "One Light",
    "dark": "Xcode Default Darker"
  },
  "languages": {
    "LaTeX": {
      "language_servers": ["harper-ls"],
      "soft_wrap": "editor_width"
    },
    "Markdown": {
      "language_servers": ["harper-ls"],
      "soft_wrap": "editor_width"
    }
  },
  "lsp": {
    "pyright": {
      "settings": {
        "python.analysis": {
          "diagnosticMode": "workspace"
        },
        "python": {
          "pythonPath": "venv/bin/python"
        }
      }
    }
  },
  "minimap": {
    "show": "always"
  }
}

[lbrndnr]

Oh turns out it doesn't support latex

[tredondo]

I've installed the extension and it works great with Markdown files. Thank you!

But I can't get it to flag any errors in TypeScript comments:

Harper's docs say it supports TypeScript - https://writewithharper.com/docs/integrations/language-server#Supported-Languages

Relevant sections from ~/.config/zed/settings.json:

  "lsp": {
    "deno": {
      "settings": {
        "deno": {
          "enable": true,
        },
      },
    },
    "json-language-server": {
      "settings": {
        "json": {
          "schemas": [
            {
              "fileMatch": ["deno.json", "deno.jsonc"],
              "url": "https://raw.githubusercontent.com/denoland/deno/refs/heads/main/cli/schemas/config-file.v1.json",
            },
            {
              "fileMatch": ["package.json"],
              "url": "https://www.schemastore.org/package",
            },
          ],
        },
      },
    },
  },
  "languages": {
    "JavaScript": {
      "language_servers": [
        "deno",
        "!typescript-language-server",
        "!vtsls",
        "!eslint",
      ],
      "formatter": "language_server",
    },
    "TypeScript": {
      "tab_size": 3,
      "format_on_save": "off",
      "formatter": "language_server",
      "language_servers": [
        "deno",
        "!typescript-language-server",
        "!vtsls",
        "!eslint",
      ],
    },
    "TSX": {
      "language_servers": [
        "deno",
        "!typescript-language-server",
        "!vtsls",
        "!eslint",
      ],
      "formatter": "language_server",
    },
  },

The Harper LSP server logs keep displaying ERROR harper_ls::backend: Settings must contain a "harper-ls" key., but grammar checking DOES work in .md files.

[hippietrail]

Oh turns out it doesn't support latex

Harper should finally have Latex support! Automattic/harper#2689