deepseek-ai/deepseek-harness · error · WorkflowError

SCRIPT_PARSE

SCRIPT_PARSE

Error message

workflow meta rides the `meta` request field, not the script: remove the `export const meta = {...}` statement from the body

What it means

Error "workflow meta rides the `meta` request field, not the script: remove the `export const meta = {...}` statement from the body" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/workflow/workflow-worker-thread/src/index.ts:66

  disposeGraceMs?: number
}

type ResolvedConfig = Required<Config>

/** A body that still carries the Claude Code-style meta header (meta rides the seam as data here). */
const META_STATEMENT = /^\s*export\s+const\s+meta\b/

/**
 * Parse-check the body with the SAME wrapper the worker-side runtime
 * compiles, so `start()` keeps the seam's synchronous `SCRIPT_PARSE` throw
 * (the worker's own compile happens a thread away, after `start()` returned).
 * One redundant parse per run, bought deliberately for the contract. A body
 * opening with `export const meta` gets a pointed message instead of the
 * wrapper's bare SyntaxError — the model's likeliest authoring slip.
 */
function assertBodyParses(body: string, name: string): void {
  if (META_STATEMENT.test(body)) {
    throw new WorkflowError('workflow meta rides the `meta` request field, not the script: remove the `export const meta = {...}` statement from the body', 'SCRIPT_PARSE')
  }
  try {
    // Parse only — the script object is discarded, nothing executes.
    void new vm.Script(`(async () => {\n${body}\n})()`, { filename: `workflow:${name}`, lineOffset: -1 })
  } catch (error: unknown) {
    throw new WorkflowError(`workflow script does not parse: ${String(error)}`, 'SCRIPT_PARSE', { cause: error })
  }
}

/** Resolve one run's provider route before publishing work. */
function resolveSubagentProvider(ctx: Context, configured: string, override: string | undefined): string {
  const provider = override ?? configured
  if (provider.length === 0 || provider !== provider.trim()) {
    throw new WorkflowError(
      'workflow subagentProvider must be a non-empty normalized string',
      'INVALID_ARGUMENT',
    )
  }

View on GitHub (pinned to b150a551b8)

Solutions

1. Remove the `export const meta = {...}` statement from the script body and pass meta through the request's meta field instead.

When it happens

Trigger: Thrown at packages/workflow/workflow-worker-thread/src/index.ts:66 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/22cb47b85de6c42a. Report an issue: GitHub.