deepseek-ai/deepseek-harness · error · Error

typert-loader: ${pkgName} exports "${TYPERT_HOST_EXPORT}" bu

Error message

typert-loader: ${pkgName} exports "${TYPERT_HOST_EXPORT}" but its module has no TYPERT manifest object

What it means

Error "typert-loader: ${pkgName} exports "${TYPERT_HOST_EXPORT}" but its module has no TYPERT manifest object" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/typert/loader/src/index.ts:85

  if (typeof target === 'object' && target !== null) {
    const fallback = (target as Record<string, unknown>).default
    if (typeof fallback === 'string') return fallback
  }
  throw new Error(`typert-loader: ${pkgName} exports["${TYPERT_HOST_EXPORT}"] must be a string or an object with a string default`)
}

/**
 * Narrow a dynamically imported typert module's `TYPERT` export to a
 * contribution owned by `pkgName`. This is the module/file boundary: the
 * manifest crosses from a build artifact into the typed registry, so every
 * field is checked and every failure names the package and the defect.
 * @param pkgName - the package whose typert face was imported.
 * @param exported - the module's `TYPERT` export.
 * @returns the validated contribution.
 */
export function validateTypertManifest(pkgName: string, exported: unknown): TypertContribution {
  if (typeof exported !== 'object' || exported === null) {
    throw new Error(`typert-loader: ${pkgName} exports "${TYPERT_HOST_EXPORT}" but its module has no TYPERT manifest object`)
  }
  const manifest = exported as Record<string, unknown>
  if (manifest.package !== pkgName) {
    throw new Error(
      `typert-loader: ${pkgName} TYPERT manifest names package ${JSON.stringify(manifest.package)} — the manifest must be owned by the package that exports it`,
    )
  }
  if (manifest.face !== 'host') {
    throw new Error(`typert-loader: ${pkgName} exports "${TYPERT_HOST_EXPORT}" but TYPERT.face is not "host"`)
  }
  if (!Array.isArray(manifest.schemas)) {
    throw new Error(`typert-loader: ${pkgName} TYPERT.schemas must be an array`)
  }
  for (const value of manifest.schemas as unknown[]) {
    if (typeof value !== 'object' || value === null) {
      throw new Error(`typert-loader: ${pkgName} TYPERT.schemas contains a non-object schema`)
    }
    const schema = value as Record<string, unknown>

View on GitHub (pinned to b150a551b8)

Solutions

1. Add the TYPERT manifest object to the module behind the typert host export.

When it happens

Trigger: Thrown at packages/typert/loader/src/index.ts:85 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/082748b48c288afe. Report an issue: GitHub.