Agent-first CLI harness — structured JSON output, structured errors with retriability + sysexits codes, HTTP error classification, MCP tool envelope helpers, pagination, schema introspection, arg parsing, input hardening. Shared foundation for @howells/th

{
  "mcpServers": {
    "howellscli": {
      "command": "npx",
      "args": [
        "-y",
        "@howells/cli"
      ]
    }
  }
}