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same client at runtime\nsetDefaultOpenAIClient(gemini as unknown as Parameters[0]);\nsetOpenAIAPI(\"chat_completions\");\nsetTracingDisabled(true);\n\nconst MODEL = \"gemini-2.5-flash\";\n\nconst QuestionList = z.object({\n questions: z.array(z.object({\n question: z.string(),\n expectedAnswer: z.string(),\n })),\n});\n\nconst questionWriter = new Agent({\n name: \"Question Writer\",\n model: MODEL,\n instructions:\n \"You write reading-comprehension quizzes. Given an article, write exactly 10 open-ended \" +\n \"comprehension questions that test understanding of its key ideas, in the order the ideas \" +\n \"appear in the article. Questions must be answerable from the article alone. For each \" +\n \"question also provide the expected answer, grounded in the article. Write the questions \" +\n \"in the same language as the article.\",\n outputType: QuestionList,\n});\n\nexport async function generateQuestions(\n article: string,\n): Promise<{ question: string; expectedAnswer: string }[]> {\n const result = await run(\n questionWriter,\n `Write the quiz for this article:\\n\\n${article}`,\n );\n const questions = result.finalOutput?.questions ?? [];\n if (questions.length === 0) {\n throw new Error(\"The model returned no questions\");\n }\n return questions.slice(0, 10);\n}\n\nconst Evaluation = z.object({\n verdict: z.enum([\"correct\", \"partially_correct\", \"incorrect\"]),\n score: z.number().describe(\"0-10, how complete and accurate the answer is\"),\n feedback: z.string().describe(\n \"2-3 friendly sentences: what the user got right, and what they missed or got wrong\",\n ),\n});\n\nconst evaluator = new Agent({\n name: \"Answer Evaluator\",\n model: MODEL,\n instructions:\n \"You grade a user's answer to a reading-comprehension question. Compare the user's answer \" +\n \"to the expected answer. Be encouraging but honest: clearly say what was right and what \" +\n \"was missing or wrong. Accept answers in the user's own words as long as the meaning \" +\n \"matches. Respond in the language the user answered in.\",\n outputType: Evaluation,\n});\n\nexport async function evaluateAnswer(\n question: string,\n expectedAnswer: string,\n userAnswer: string,\n): Promise> {\n const result = await run(\n evaluator,\n `Question: ${question}\\n\\nExpected answer: ${expectedAnswer}\\n\\nUser's answer: ${userAnswer}`,\n );\n if (!result.finalOutput) {\n throw new Error(\"The model returned no evaluation\");\n }\n return result.finalOutput;\n}\n\nconst summarizer = new Agent({\n name: \"Quiz Summarizer\",\n model: MODEL,\n instructions:\n \"You wrap up a reading-comprehension quiz. Given the full list of questions, the user's \" +\n \"answers and the per-question scores, write a short, friendly summary message for the \" +\n \"user: overall result, what they understood well, and which topics from the article are \" +\n \"worth re-reading. Plain text only, no markdown. Respond in the language of the quiz.\",\n});\n\nexport async function summarizeQuiz(questions: Question[]): Promise {\n const transcript = questions.map((q) =>\n `Q${q.idx}: ${q.question}\\nExpected: ${q.expected_answer}\\n` +\n `User answered: ${q.user_answer ?? \"(no answer)\"}\\nScore: ${q.score ?? 0}/10`\n ).join(\"\\n\\n\");\n const total = questions.reduce((sum, q) => sum + (q.score ?? 0), 0);\n const result = await run(\n summarizer,\n `The quiz is over. Total score: ${total}/${questions.length * 10}.\\n\\n${transcript}`,\n );\n return result.finalOutput ?? `Quiz finished! Your total score: ${total}/${questions.length * 10}`;\n}\n",[139],"b2796285-3ff9-4551-b5da-d52967137eee","main.http.ts","5b4a7484-65a9-11f1-9193-1607ee4eb77e",4,["D",1781191347996],"http","import {\n advanceSession,\n cancelActiveSessions,\n createSession,\n finishSession,\n getActiveSession,\n getAllQuestions,\n getQuestion,\n initDb,\n saveAnswer,\n} from \"./db.ts\";\nimport { extractArticle } from \"./article.ts\";\nimport { evaluateAnswer, generateQuestions, summarizeQuiz } from \"./quiz.ts\";\nimport { sendMessage } from \"./telegram.ts\";\n\nconst TOTAL_QUESTIONS = 10;\n\nconst VERDICT_EMOJI: Record = {\n correct: \"✅\",\n partially_correct: \"🟡\",\n incorrect: \"❌\",\n};\n\nasync function startQuiz(chatId: string, url: string) {\n await cancelActiveSessions(chatId);\n await sendMessage(chatId, \"📖 Reading the article and preparing your quiz, give me a moment...\");\n\n const article = await extractArticle(url);\n const questions = await generateQuestions(article);\n const sessionId = await createSession(chatId, url, article, questions);\n\n const first = await getQuestion(sessionId, 1);\n await sendMessage(chatId, `Question 1/${questions.length}:\\n\\n${first!.question}`);\n}\n\nasync function handleAnswer(chatId: string, text: string) {\n const session = await getActiveSession(chatId);\n if (!session) {\n await sendMessage(\n chatId,\n \"Send me a link to an article and I'll quiz you on it with 10 comprehension questions 📚\",\n );\n return;\n }\n\n const current = await getQuestion(session.id, session.current_question);\n if (!current) {\n await finishSession(session.id);\n await sendMessage(chatId, \"Something went wrong with this quiz. Send me a new link to start over.\");\n return;\n }\n\n const evaluation = await evaluateAnswer(current.question, current.expected_answer, text);\n await saveAnswer(current.id, text, evaluation.feedback, Math.round(evaluation.score));\n\n const emoji = VERDICT_EMOJI[evaluation.verdict] ?? \"\";\n await sendMessage(chatId, `${emoji} ${evaluation.feedback}`);\n\n if (session.current_question >= TOTAL_QUESTIONS) {\n await finishSession(session.id);\n const questions = await getAllQuestions(session.id);\n await sendMessage(chatId, await summarizeQuiz(questions));\n await sendMessage(chatId, \"Want another round? Send me a new article link 🔗\");\n } else {\n const nextIdx = session.current_question + 1;\n await advanceSession(session.id, nextIdx);\n const next = await getQuestion(session.id, nextIdx);\n await sendMessage(chatId, `Question ${nextIdx}/${TOTAL_QUESTIONS}:\\n\\n${next!.question}`);\n }\n}\n\nexport default async function (req: Request): Promise {\n if (req.method !== \"POST\") {\n return new Response(\"Telegram quiz bot is running 🤖\");\n }\n\n const update = await req.json();\n const msg = update.message;\n if (!msg?.text || !msg.chat) {\n return Response.json({ ok: true });\n }\n\n await initDb();\n const chatId = String(msg.chat.id);\n const text: string = msg.text.trim();\n const urlMatch = text.match(/https?:\\/\\/\\S+/);\n\n try {\n if (text === \"/start\") {\n await sendMessage(\n chatId,\n \"Hi! 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Diff · v5