{"record":{"id":"b3760ba26301742e","repo":"vxcontrol/pentagi","slug":"operation-d-modify-operation-missing-required-id","errorCode":null,"errorMessage":"operation %d: modify operation missing required id field","messagePattern":"operation (.+?): modify operation missing required id field","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"backend/pkg/providers/subtask_patch.go","lineNumber":73,"sourceCode":"\n\t\tswitch op.Op {\n\t\tcase tools.SubtaskOpRemove:\n\t\t\tif op.ID == nil {\n\t\t\t\terr := fmt.Errorf(\"operation %d: remove operation missing required id field\", i)\n\t\t\t\topLogger.Error(err.Error())\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\tif _, ok := idToIdx[*op.ID]; !ok {\n\t\t\t\terr := fmt.Errorf(\"operation %d: subtask with id %d not found for removal\", i, *op.ID)\n\t\t\t\topLogger.Error(err.Error())\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\tremoved[*op.ID] = true\n\t\t\topLogger.WithField(\"subtask_id\", *op.ID).Debug(\"marked subtask for removal\")\n\n\t\tcase tools.SubtaskOpModify:\n\t\t\tif op.ID == nil {\n\t\t\t\terr := fmt.Errorf(\"operation %d: modify operation missing required id field\", i)\n\t\t\t\topLogger.Error(err.Error())\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\tif op.Title == \"\" && op.Description == \"\" {\n\t\t\t\terr := fmt.Errorf(\"operation %d: modify operation missing both title and description fields\", i)\n\t\t\t\topLogger.Error(err.Error())\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\tidx, ok := idToIdx[*op.ID]\n\t\t\tif !ok {\n\t\t\t\terr := fmt.Errorf(\"operation %d: subtask with id %d not found for modification\", i, *op.ID)\n\t\t\t\topLogger.Error(err.Error())\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\t// Only update fields that are provided\n\t\t\tif op.Title != \"\" {\n\t\t\t\tresult[idx].Title = op.Title\n\t\t\t\topLogger.WithField(\"new_title\", op.Title).Debug(\"updated subtask title\")","sourceCodeStart":55,"sourceCodeEnd":91,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/providers/subtask_patch.go#L55-L91","documentation":"For Op == SubtaskOpModify, applySubtaskOperations requires an ID identifying which subtask to change. A modify operation without ID is rejected before any field is applied, since modifying 'the current subtask' implicitly is ambiguous.","triggerScenarios":"LLM-generated patch contains {\"op\":\"modify\",\"title\":\"...\"} with no \"id\"; validation in applySubtaskOperations (via patchAssistantFlowSubtasks / performSubtasksRefiner) aborts the patch.","commonSituations":"Model omitting required fields; prompt/tool schema not marking id as required for modify; truncation of long JSON outputs dropping fields.","solutions":["Retry the LLM call; malformed output is frequently transient.","Make \"id\" required in the tool/JSON schema for modify operations.","Add explicit prompt instructions: every modify must include the target subtask id.","Reduce patch size to avoid truncation dropping fields."],"exampleFix":"// before\n{\"op\":\"modify\",\"description\":\"Use nmap -sV\"} // missing id\n// after\n{\"op\":\"modify\",\"id\":1,\"description\":\"Use nmap -sV\"}","handlingStrategy":"validation","validationCode":"for i, op := range ops {\n    if op.Op == tools.SubtaskOpModify && op.ID == nil {\n        return fmt.Errorf(\"op %d: modify requires id\", i)\n    }\n}","typeGuard":"func isTargetedModify(op tools.SubtaskOperation) bool {\n    return op.Op == tools.SubtaskOpModify && op.ID != nil\n}","tryCatchPattern":"patched, err := applySubtaskOperations(ctx, logger, ops, subtasks)\nif err != nil && strings.Contains(err.Error(), \"modify operation missing required id\") {\n    return retryRefinerWithSchemaReminder(ctx)\n}","preventionTips":["Require id in the modify-op JSON schema.","Prompt the model to always target a specific subtask id for modify.","Check for output truncation if fields are systematically missing."],"tags":["validation","llm","json-schema","subtasks"],"backgroundTag":"schema-validation-failed","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}