deepseek-ai/deepseek-harness · error · TypeError

command "${command}" success sourceEventSeq must be a non-ne

Error message

command "${command}" success sourceEventSeq must be a non-negative safe integer when supplied

What it means

Error "command "${command}" success sourceEventSeq must be a non-negative safe integer when supplied" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/interaction/commands/src/index.ts:228

    description: normalized.description,
    ...normalized.input === undefined ? {} : { input: normalized.input },
  })
  return { definition: normalized, descriptor }
}

/** Validate and detach an untrusted handler result at the registry boundary. */
function normalizeResult(command: string, value: unknown): CommandResult {
  if (typeof value !== 'object' || value === null || !('kind' in value)) {
    throw new TypeError(`command "${command}" handler must return a CommandResult`)
  }
  const result = value as { kind?: unknown; text?: unknown; sourceEventSeq?: unknown }
  if (result.kind === 'success') {
    if (result.text !== undefined && typeof result.text !== 'string') {
      throw new TypeError(`command "${command}" success text must be a string when supplied`)
    }
    if (result.sourceEventSeq !== undefined
      && (!Number.isSafeInteger(result.sourceEventSeq) || (result.sourceEventSeq as number) < 0)) {
      throw new TypeError(`command "${command}" success sourceEventSeq must be a non-negative safe integer when supplied`)
    }
    return Object.freeze({
      kind: 'success',
      ...result.text === undefined ? {} : { text: result.text },
      ...result.sourceEventSeq === undefined ? {} : { sourceEventSeq: result.sourceEventSeq as number },
    })
  }
  if (result.kind === 'error') {
    if (typeof result.text !== 'string' || result.text.trim().length === 0) {
      throw new TypeError(`command "${command}" error text must be a non-empty string`)
    }
    return Object.freeze({ kind: 'error', text: result.text })
  }
  throw new TypeError(`command "${command}" returned unknown result kind "${String(result.kind)}"`)
}

/**
 * Human-command registry. Plain-context definitions are global; definitions

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/interaction/commands/src/index.ts:228 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/8d582477b4cbee87. Report an issue: GitHub.