deepseek-ai/deepseek-harness · error · Error

type must be a non-empty string

Error message

type must be a non-empty string

What it means

Error "type must be a non-empty string" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/terminal/tool-terminal/src/index.ts:183

    parameters: {
      type: { type: 'string', required: true, description: 'Registered terminal backend type, usually "shell".' },
      name: { type: 'string', description: 'Optional owner-local display name such as "main" or "gdb".' },
      cwd: { type: 'string', description: 'Initial working directory. Defaults to the deployment workspace root.' },
    },
    finalizeContent,
    output: {
      schema: {
        type: 'object',
        additionalProperties: false,
        properties: {
          ...SESSION_SNAPSHOT_PROPERTIES,
          motd: { type: 'string', required: true },
        },
      },
      render: (_args, value) => [{ type: 'text', text: renderSpawn(value, maxResultBytes) }],
    },
    async execute(args: SpawnArgs, exec) {
      if (args.type.length === 0) throw new Error('type must be a non-empty string')
      const result = await ctx.terminals.spawn(requireAgent(exec.agent), {
        type: args.type,
        ...args.name !== undefined ? { name: args.name } : {},
        ...args.cwd !== undefined ? { cwd: args.cwd } : {},
      }, exec.signal)
      return result
    },
    presentCall: (args) => {
      const parsed = args
      return { card: 'generic', title: `Open terminal ${parsed.name ?? parsed.type}`, kind: 'execute' }
    },
  }))

  ctx.tools.register(defineTool({
    name: 'terminal_send',
    description: 'Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit.'
      + (enableRunInBackground ? ' Background mode returns a job id for job_output/job_kill.' : ''),
    parameters: {

View on GitHub (pinned to b150a551b8)

Solutions

1. Pass a non-empty type string.

When it happens

Trigger: Thrown at packages/terminal/tool-terminal/src/index.ts:183 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/c83ae5a7355b5355. Report an issue: GitHub.