deepseek-ai/deepseek-harness · error · Error

typert-loader: ${pkgName} ${subject} must use a strict codec

Error message

typert-loader: ${pkgName} ${subject} must use a strict codec

What it means

Error "typert-loader: ${pkgName} ${subject} must use a strict codec" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/typert/loader/src/index.ts:267

  if (receiver.kind === 'context' && wires.has(receiver.wire as string)) {
    throw new Error(`typert-loader: ${pkgName} invocation "${id}" repeats Context wire field "${receiver.wire as string}"`)
  }
  requireStrictCodec(pkgName, invocation.result, `invocation "${id}" result codec`)
  if (invocation.sourceLocation !== undefined) {
    const location = requireObject(pkgName, invocation.sourceLocation, `invocation "${id}" sourceLocation`)
    requireString(pkgName, location, 'file', `invocation "${id}" sourceLocation`)
    for (const key of ['line', 'column'] as const) {
      if (!Number.isInteger(location[key]) || (location[key] as number) < 1) {
        throw new Error(`typert-loader: ${pkgName} invocation "${id}" sourceLocation.${key} must be a positive integer`)
      }
    }
  }
}

function requireStrictCodec(pkgName: string, value: unknown, subject: string): void {
  const codec = requireObject(pkgName, value, subject)
  if (codec.mode !== 'strict') {
    throw new Error(`typert-loader: ${pkgName} ${subject} must use a strict codec`)
  }
  requireString(pkgName, codec, 'typeSymbol', subject)
  if (typeof codec.schema !== 'object'
    || codec.schema === null
    || !('_zod' in codec.schema)
    || typeof (codec.schema as { parse?: unknown }).parse !== 'function') {
    throw new Error(`typert-loader: ${pkgName} ${subject} is not backed by a zod v4 schema`)
  }
}

/**
 * Scan current Loader entries during activation, then follow entry mounts and
 * unmounts for this plugin's lifetime.
 * @param ctx - plugin context carrying `typert` and `loader`.
 * @param config - explicit package artifacts in addition to Loader entries.
 */
export async function apply(ctx: Context, config: Config): Promise<void> {
  // Resolution anchor: the config tree's baseUrl (the cordis.yml directory,

View on GitHub (pinned to b150a551b8)

Solutions

1. Use a strict codec for the manifest subject; regenerate with the strict codec.

When it happens

Trigger: Thrown at packages/typert/loader/src/index.ts:267 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/269a0ee33f05b795. Report an issue: GitHub.