{"record":{"id":"1cede36fcc4bbf37","repo":"earendil-works/pi","slug":"transformed-eval-system-prompt-must-not-be-empty","errorCode":null,"errorMessage":"Transformed eval system prompt must not be empty.","messagePattern":"Transformed eval system prompt must not be empty\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/evals/src/pi-harness.ts","lineNumber":156,"sourceCode":"\t\t\t\t: {}),\n\t\t});\n\t\tsignal?.throwIfAborted();\n\t\tsessionManager = SessionManager.create(cwd, join(root, \"sessions\"));\n\t\tsetArtifact(\"runId\", sessionManager.getSessionId());\n\t\tsession = (\n\t\t\tawait createAgentSessionFromServices({\n\t\t\t\tservices,\n\t\t\t\tsessionManager,\n\t\t\t\tmodel,\n\t\t\t\tthinkingLevel: \"off\",\n\t\t\t\tnoTools: options.noTools,\n\t\t\t})\n\t\t).session;\n\n\t\tconst evalSession = session;\n\t\tif (options.transformSystemPrompt) {\n\t\t\ttransformedSystemPrompt = options.transformSystemPrompt(evalSession.systemPrompt);\n\t\t\tif (!transformedSystemPrompt.trim()) throw new Error(\"Transformed eval system prompt must not be empty.\");\n\t\t\tawait evalSession.reload();\n\t\t}\n\t\tlet abortPromise: Promise<void> | undefined;\n\t\tconst abort = () => {\n\t\t\tabortPromise ??= evalSession.abort();\n\t\t};\n\t\tsignal?.addEventListener(\"abort\", abort, { once: true });\n\t\ttry {\n\t\t\tsignal?.throwIfAborted();\n\t\t\tif (evalSession.extensionRunner.getExtensionPaths().length !== 0) {\n\t\t\t\tthrow new Error(\"Expected an isolated eval session to start without extensions.\");\n\t\t\t}\n\t\t\tconst steps = typeof input === \"string\" ? [{ type: \"prompt\" as const, content: input }] : input;\n\t\t\tlet response: string | undefined;\n\t\t\tfor (const step of steps) {\n\t\t\t\tif (step.type === \"prompt\") {\n\t\t\t\t\tresponse = await promptAgent(evalSession, step.content, signal);\n\t\t\t\t} else {","sourceCodeStart":138,"sourceCodeEnd":174,"githubUrl":"https://github.com/earendil-works/pi/blob/4af9d21d3b4d664e4a29fcabfec85171077248e3/packages/evals/src/pi-harness.ts#L138-L174","documentation":"Error \"Transformed eval system prompt must not be empty.\" thrown in earendil-works/pi.","triggerScenarios":"Thrown at packages/evals/src/pi-harness.ts:156 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":"4af9d21d3b4d664e4a29fcabfec85171077248e3","analyzedAt":"2026-08-24T13:07:14.692Z","schemaVersion":2},"datasetVersion":"2026-08-24T17:17:21.512Z"}