coc-settings.json

{
    // preferences
    "coc.preferences.colorSupport": true,
    "coc.preferences.formatOnType": true,
    "coc.preferences.formatOnSaveFiletypes": [
        "dart",
        "php",
        "python",
        "javascript",
        "javascriptreact",
        "typescript",
        "typescriptreact",
        "json",
        "css",
        "html"
    ],
    // diagnostic
    "diagnostic.infoSign": "?",
    "diagnostic.hintSign": "+",
    "diagnostic.warningSign": "!",
    "diagnostic.errorSign": "x",
    "languageserver": {
        "dart": {
            "command": "dart",
            "args": [
                "/usr/lib/dart/bin/snapshots/analysis_server.dart.snapshot",
                "--lsp"
            ],
            "filetypes": ["dart"],
            "disableDynamicRegister": true,
            "trace.server": "verbose"
        }
    },
    "diagnostic-languageserver.formatFiletypes": {
        "dart": "dartfmt"
    },
    // python
    "python.jediEnabled": true,
    "python.linting.enabled": true,
    "python.linting.pylintEnabled": false,
    "python.linting.flake8Enabled": true,
    "python.analysis.logLevel": "Warning",
    "python.formatting.provider": "black",
    "python.formatting.blackArgs": ["--line-length", "80"],
    // yaml
    "yaml.format.enable": true,
    "yaml.validate": true,
    // prettier
    "prettier.semi": true,
    "prettier.singleQuote": true,
    "prettier.tabWidth": 4
}