{"record":{"id":"e3cc5ad692209b61","repo":"openai/codex","slug":"code-cell-start-did-not-include-a-codex-turn-id","errorCode":null,"errorMessage":"code cell start {} did not include a Codex turn id","messagePattern":"code cell start (.+?) did not include a Codex turn id","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"codex-rs/rollout-trace/src/reducer/code_cell.rs","lineNumber":144,"sourceCode":"        }\n        Ok(())\n    }\n\n    /// Inserts the reduced `CodeCell` once source ownership can be proven.\n    fn start_code_cell(&mut self, pending: PendingCodeCellStart) -> Result<()> {\n        let PendingCodeCellStart {\n            seq,\n            wall_time_unix_ms,\n            thread_id,\n            codex_turn_id,\n            started,\n        } = pending;\n        if self.rollout.code_cells.contains_key(&started.code_cell_id) {\n            bail!(\"duplicate code cell start for {}\", started.code_cell_id);\n        }\n\n        let Some(codex_turn_id) = codex_turn_id else {\n            bail!(\n                \"code cell start {} did not include a Codex turn id\",\n                started.code_cell_id\n            );\n        };\n        self.validate_code_cell_turn(&thread_id, &codex_turn_id)?;\n\n        let source_item_id = self.source_item_id_for_code_cell_start(\n            &thread_id,\n            &started.code_cell_id,\n            &started.model_visible_call_id,\n        )?;\n        let output_item_ids = self.model_visible_code_cell_item_ids(\n            &thread_id,\n            &started.model_visible_call_id,\n            ConversationItemKind::CustomToolCallOutput,\n        );\n        // Runtime events may also have arrived while the start was queued.\n        // Seed these reverse links from already-reduced tool calls so replay is","sourceCodeStart":126,"sourceCodeEnd":162,"githubUrl":"https://github.com/openai/codex/blob/339751715c64496cb86246bfb3935f40e309dd3d/codex-rs/rollout-trace/src/reducer/code_cell.rs#L126-L162","documentation":"Error \"code cell start {} did not include a Codex turn id\" thrown in openai/codex.","triggerScenarios":"Thrown at codex-rs/rollout-trace/src/reducer/code_cell.rs:144 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"339751715c64496cb86246bfb3935f40e309dd3d","analyzedAt":"2026-08-25T05:35:09.876Z","schemaVersion":2},"datasetVersion":"2026-08-25T06:17:31.827Z"}