{"record":{"id":"1801b7406ef5d15b","repo":"deepseek-ai/deepseek-harness","slug":"typert-invocation-descriptor-id-lookup-param","errorCode":null,"errorMessage":"typert: invocation \"${descriptor.id}\" lookup parameter \"${parameter.name}\" cannot accept undefined","messagePattern":"typert: invocation \"(.+?)\" lookup parameter \"(.+?)\" cannot accept undefined","errorType":"validation","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/typert/registry/src/service.ts","lineNumber":657,"sourceCode":"  validateNonempty('invocation id', descriptor.id)\n  validateSegment('invocation service key', descriptor.service)\n  validateWireName('invocation namespace', descriptor.namespace)\n  validateWireName('invocation method', descriptor.method)\n  if (descriptor.implementation !== undefined) {\n    validateWireName('invocation implementation method', descriptor.implementation)\n  }\n  validateCodec(descriptor.result, `${descriptor.id} result`)\n  const wires = new Set<string>()\n  for (const parameter of descriptor.parameters) {\n    validateWireName('parameter name', parameter.name)\n    validateWireName('parameter wire field', parameter.wire)\n    if (wires.has(parameter.wire)) {\n      throw new Error(`typert: invocation \"${descriptor.id}\" repeats wire field \"${parameter.wire}\"`)\n    }\n    wires.add(parameter.wire)\n    if (parameter.source === 'lookup') {\n      if (parameter.acceptsUndefined !== undefined) {\n        throw new Error(`typert: invocation \"${descriptor.id}\" lookup parameter \"${parameter.name}\" cannot accept undefined`)\n      }\n      if (parameter.lookup === undefined) {\n        throw new Error(`typert: invocation \"${descriptor.id}\" lookup parameter \"${parameter.name}\" has no lookup key`)\n      }\n      validateSegment('lookup key', parameter.lookup)\n    } else if (parameter.lookup !== undefined) {\n      throw new Error(`typert: invocation \"${descriptor.id}\" JSON parameter \"${parameter.name}\" declares a lookup key`)\n    }\n    validateCodec(parameter.codec, `${descriptor.id} parameter ${parameter.name}`)\n  }\n  const cancellation = descriptor.cancellation as { readonly parameter: string } | undefined\n  if (cancellation !== undefined && cancellation.parameter !== 'signal') {\n    throw new Error(`typert: invocation \"${descriptor.id}\" cancellation parameter must be \"signal\"`)\n  }\n  if (descriptor.scope !== undefined) {\n    if (descriptor.invocation.kind !== 'direct') {\n      throw new Error(`typert: invocation \"${descriptor.id}\" Context receiver cannot declare a direct scope projection`)\n    }","sourceCodeStart":639,"sourceCodeEnd":675,"githubUrl":"https://github.com/deepseek-ai/deepseek-harness/blob/b150a551b8d465e31e418e1b2eaf5e79bbb7d28e/packages/typert/registry/src/service.ts#L639-L675","documentation":"Error \"typert: invocation \"${descriptor.id}\" lookup parameter \"${parameter.name}\" cannot accept undefined\" thrown in deepseek-ai/deepseek-harness.","triggerScenarios":"Thrown at packages/typert/registry/src/service.ts:657 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Make the lookup parameter required (not undefined-accepting) or convert it to a JSON parameter."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b150a551b8d465e31e418e1b2eaf5e79bbb7d28e","analyzedAt":"2026-08-24T18:12:29.105Z","schemaVersion":2},"datasetVersion":"2026-08-24T22:17:12.610Z"}