deepseek-ai/deepseek-harness · error · Error

harness.defineTool ${path}.${key} is not supported by the un

Error message

harness.defineTool ${path}.${key} is not supported by the unified schema DSL

What it means

Error "harness.defineTool ${path}.${key} is not supported by the unified schema DSL" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/extensions/cordis-host-runner/src/guard.ts:204

      })
    }
  }
  return root
}

/** Copy and realm-materialize the shared annotation vocabulary. */
function copyAnnotations(value: Record<string, unknown>, output: Record<string, unknown>, path: string): void {
  if (Object.hasOwn(value, 'description')) output.description = value.description
  if (Object.hasOwn(value, 'title')) output.title = value.title
  if (Object.hasOwn(value, 'default')) output.default = cloneJson(value.default, `harness.defineTool ${path}.default`)
  if (Object.hasOwn(value, 'examples')) output.examples = cloneJson(value.examples, `harness.defineTool ${path}.examples`)
}

/** Reject sandbox schema keys that the unified DSL would otherwise ignore. */
function assertSchemaKeys(value: Record<string, unknown>, path: string, allowed: readonly string[]): void {
  assertSchemaContainerKeys(value, path)
  for (const key of Object.keys(value)) {
    if (!allowed.includes(key)) throw new Error(`harness.defineTool ${path}.${key} is not supported by the unified schema DSL`)
  }
}

/**
 * Normalize a sandbox-provided `parameters` value into a fresh host-realm
 * ParameterSchemaSpec. A raw JSON-Schema object wrapper retains its open root
 * default, while the direct DSL is already an implicit open property map.
 */
function normalizeParameterSchemaSpec(value: unknown, path = 'parameters'): {
  spec: Record<string, unknown>
  rootAnnotations?: Record<string, unknown>
} {
  if (!isPlainRecord(value)) {
    throw new Error(`harness.defineTool ${path} must be a ParameterSchemaSpec object`)
  }
  if (value.type === 'object') {
    assertSchemaKeys(value, path, ['type', 'properties', 'required', 'additionalProperties', ...ANNOTATION_KEYS])
    if (!isPlainRecord(value.properties)) {

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/extensions/cordis-host-runner/src/guard.ts:204 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/8b1d1d49fbbafcf3. Report an issue: GitHub.