{"record":{"id":"be689e981e6600de","repo":"coleam00/Archon","slug":"bash-node-node-id-stderr-stderr-trim","errorCode":null,"errorMessage":"Bash node '${node.id}' stderr:\n```\n${stderr.trim()}\n```","messagePattern":"Bash node '(.+?)' stderr:\n```\n(.+?)\n```","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"packages/workflows/src/dag-executor.ts","lineNumber":3722,"sourceCode":"      timeout,\n      env: subprocessEnv,\n      protectedEnvKeys,\n      protectedCredentialValues,\n      retention: {\n        logDir,\n        workflowRunId: workflowRun.id,\n        nodeId: node.id,\n        label: '<bash>',\n      },\n    });\n\n    // Trim trailing newline from stdout (common shell behavior)\n    const output = stdout.replace(/\\n$/, '');\n\n    if (stderr.trim()) {\n      getLog().warn({ nodeId: node.id, stderr: stderr.trim() }, 'bash_node_stderr');\n      await safeSendMessage(\n        platform,\n        conversationId,\n        `Bash node '${node.id}' stderr:\\n\\`\\`\\`\\n${stderr.trim()}\\n\\`\\`\\``,\n        nodeContext\n      );\n    }\n\n    const duration = Date.now() - nodeStartTime;\n    getLog().info({ nodeId: node.id, durationMs: duration }, 'dag_node_completed');\n    await logNodeComplete(logDir, workflowRun.id, node.id, '<bash>', { durationMs: duration });\n\n    const persistedOutput = formatPersistedNodeOutput(output, artifactsDir, stepName);\n\n    deps.store\n      .createWorkflowEvent({\n        workflow_run_id: workflowRun.id,\n        event_type: 'node_completed',\n        step_name: stepName,\n        data: {","sourceCodeStart":3704,"sourceCodeEnd":3740,"githubUrl":"https://github.com/coleam00/Archon/blob/0773b9745896ef0612e709c80845a0f7db315b19/packages/workflows/src/dag-executor.ts#L3704-L3740","documentation":"In packages/workflows/src/dag-executor.ts:3722, when a bash node finishes and its stderr is non-empty, the executor logs a 'bash_node_stderr' warning and sends the stderr to the conversation as a formatted message. It is an informational notification, not a thrown failure — the node's stdout is still processed.","triggerScenarios":"A bash: workflow node runs a command that writes to stderr (compiler/library warnings, progress output on stderr, missing file notices), even when the command exits 0.","commonSituations":"Tools like curl, git, or package managers writing progress or deprecation warnings to stderr; a script that redirects stdout correctly but not stderr; noisy CLIs used inside workflow bash nodes.","solutions":["Fix or silence the underlying command emitting stderr (redirect 2>/dev/null if the noise is expected)","Check the run log keyed 'bash_node_stderr' for the full stderr text","Change the script so diagnostics go to stdout or a file instead of stderr"],"exampleFix":"// workflow node script\n# before\ncurl -sS $URL\n# after\ncurl -sS --silent $URL 2>/dev/null || curl -sS $URL","handlingStrategy":"validation","validationCode":"// Before treating a bash node as clean, check stderr in a dry run:\nconst { stderr } = Bun.spawnSync(['bash','-c', command]);\nif (stderr.toString().trim()) console.warn('command will emit stderr in the workflow:', stderr.toString());","typeGuard":"function hasStderr(r: { stderr: string }): boolean {\n  return r.stderr.trim().length > 0;\n}","tryCatchPattern":null,"preventionTips":["Redirect expected stderr noise: command 2>/dev/null or 2>>log.txt","Prefer CLIs with --quiet/--silent flags in workflow nodes","Treat the warning message as a hint, not a failure — stdout is still used","Keep diagnostics-heavy tools out of bash nodes; write diagnostics to files instead"],"tags":["bash","stderr","workflow","notification"],"backgroundTag":"node-stderr-output","analyzedSha":"0773b9745896ef0612e709c80845a0f7db315b19","analyzedAt":"2026-09-01T02:28:07.064Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T05:18:18.240Z"}