fix(bot): harden webhook processing and purchase defaults

2026-03-31 11:54:03 +00:00 · 2026-03-11 03:25:16 +04:00
parent dc09a07e21
commit ac5f11f8da
12 changed files with 674 additions and 148 deletions
--- a/apps/bot/src/dm-assistant.test.ts
+++ b/apps/bot/src/dm-assistant.test.ts
@@ -3,6 +3,7 @@ import { describe, expect, test } from 'bun:test'
 import type { FinanceCommandService } from '@household/application'
 import type {
  HouseholdConfigurationRepository,
+  ProcessedBotMessageRepository,
  TelegramPendingActionRecord,
  TelegramPendingActionRepository
 } from '@household/ports'
@@ -313,6 +314,30 @@ function createPromptRepository(): TelegramPendingActionRepository {
  }
 }

+function createProcessedBotMessageRepository(): ProcessedBotMessageRepository {
+  const claims = new Set<string>()
+
+  return {
+    async claimMessage(input) {
+      const key = `${input.householdId}:${input.source}:${input.sourceMessageKey}`
+      if (claims.has(key)) {
+        return {
+          claimed: false
+        }
+      }
+
+      claims.add(key)
+
+      return {
+        claimed: true
+      }
+    },
+    async releaseMessage(input) {
+      claims.delete(`${input.householdId}:${input.source}:${input.sourceMessageKey}`)
+    }
+  }
+}
+
 describe('registerDmAssistant', () => {
  test('replies with a conversational DM answer and records token usage', async () => {
    const bot = createTestBot()
@@ -372,19 +397,26 @@ describe('registerDmAssistant', () => {

    await bot.handleUpdate(privateMessageUpdate('How much do I still owe this month?') as never)

-    expect(calls).toHaveLength(2)
+    expect(calls).toHaveLength(3)
    expect(calls[0]).toMatchObject({
+      method: 'sendChatAction',
+      payload: {
+        chat_id: 123456,
+        action: 'typing'
+      }
+    })
+    expect(calls[1]).toMatchObject({
      method: 'sendMessage',
      payload: {
        chat_id: 123456,
        text: 'Working on it...'
      }
    })
-    expect(calls[1]).toMatchObject({
+    expect(calls[2]).toMatchObject({
      method: 'editMessageText',
      payload: {
        chat_id: 123456,
-        message_id: 1,
+        message_id: 2,
        text: 'You still owe 350.00 GEL this cycle.'
      }
    })
@@ -462,6 +494,82 @@ describe('registerDmAssistant', () => {
    })
  })

+  test('ignores duplicate deliveries of the same DM update', async () => {
+    const bot = createTestBot()
+    const calls: Array<{ method: string; payload: unknown }> = []
+    const usageTracker = createInMemoryAssistantUsageTracker()
+
+    bot.api.config.use(async (_prev, method, payload) => {
+      calls.push({ method, payload })
+
+      if (method === 'sendMessage') {
+        return {
+          ok: true,
+          result: {
+            message_id: calls.length,
+            date: Math.floor(Date.now() / 1000),
+            chat: {
+              id: 123456,
+              type: 'private'
+            },
+            text: (payload as { text?: string }).text ?? 'ok'
+          }
+        } as never
+      }
+
+      return {
+        ok: true,
+        result: true
+      } as never
+    })
+
+    registerDmAssistant({
+      bot,
+      assistant: {
+        async respond() {
+          return {
+            text: 'You still owe 350.00 GEL this cycle.',
+            usage: {
+              inputTokens: 100,
+              outputTokens: 25,
+              totalTokens: 125
+            }
+          }
+        }
+      },
+      householdConfigurationRepository: createHouseholdRepository(),
+      messageProcessingRepository: createProcessedBotMessageRepository(),
+      promptRepository: createPromptRepository(),
+      financeServiceForHousehold: () => createFinanceService(),
+      memoryStore: createInMemoryAssistantConversationMemoryStore(12),
+      rateLimiter: createInMemoryAssistantRateLimiter({
+        burstLimit: 5,
+        burstWindowMs: 60_000,
+        rollingLimit: 50,
+        rollingWindowMs: 86_400_000
+      }),
+      usageTracker
+    })
+
+    const update = privateMessageUpdate('How much do I still owe this month?')
+    await bot.handleUpdate(update as never)
+    await bot.handleUpdate(update as never)
+
+    expect(calls).toHaveLength(3)
+    expect(usageTracker.listHouseholdUsage('household-1')).toEqual([
+      {
+        householdId: 'household-1',
+        telegramUserId: '123456',
+        displayName: 'Stan',
+        requestCount: 1,
+        inputTokens: 100,
+        outputTokens: 25,
+        totalTokens: 125,
+        updatedAt: expect.any(String)
+      }
+    ])
+  })
+
  test('confirms a pending payment proposal from DM callback', async () => {
    const bot = createTestBot()
    const calls: Array<{ method: string; payload: unknown }> = []
--- a/apps/bot/src/dm-assistant.ts
+++ b/apps/bot/src/dm-assistant.ts
@@ -3,6 +3,7 @@ import { Money } from '@household/domain'
 import type { Logger } from '@household/observability'
 import type {
  HouseholdConfigurationRepository,
+  ProcessedBotMessageRepository,
  TelegramPendingActionRepository
 } from '@household/ports'
 import type { Bot, Context } from 'grammy'
@@ -10,10 +11,12 @@ import type { Bot, Context } from 'grammy'
 import { resolveReplyLocale } from './bot-locale'
 import { getBotTranslations, type BotLocale } from './i18n'
 import type { AssistantReply, ConversationalAssistant } from './openai-chat-assistant'
+import { startTypingIndicator } from './telegram-chat-action'

 const ASSISTANT_PAYMENT_ACTION = 'assistant_payment_confirmation' as const
 const ASSISTANT_PAYMENT_CONFIRM_CALLBACK_PREFIX = 'assistant_payment:confirm:'
 const ASSISTANT_PAYMENT_CANCEL_CALLBACK_PREFIX = 'assistant_payment:cancel:'
+const DM_ASSISTANT_MESSAGE_SOURCE = 'telegram-dm-assistant'
 const MEMORY_SUMMARY_MAX_CHARS = 1200

 interface AssistantConversationTurn {
@@ -465,6 +468,7 @@ export function registerDmAssistant(options: {
  bot: Bot
  assistant?: ConversationalAssistant
  householdConfigurationRepository: HouseholdConfigurationRepository
+  messageProcessingRepository?: ProcessedBotMessageRepository
  promptRepository: TelegramPendingActionRepository
  financeServiceForHousehold: (householdId: string) => FinanceCommandService
  memoryStore: AssistantConversationMemoryStore
@@ -641,135 +645,181 @@ export function registerDmAssistant(options: {
    }

    const member = memberships[0]!
-    const rateLimit = options.rateLimiter.consume(`${member.householdId}:${telegramUserId}`)
-    if (!rateLimit.allowed) {
-      await ctx.reply(t.rateLimited(formatRetryDelay(locale, rateLimit.retryAfterMs)))
-      return
-    }
+    const updateId = ctx.update.update_id?.toString()
+    const dedupeClaim =
+      options.messageProcessingRepository && typeof updateId === 'string'
+        ? {
+            repository: options.messageProcessingRepository,
+            updateId
+          }
+        : null

-    const financeService = options.financeServiceForHousehold(member.householdId)
-    const paymentProposal = await maybeCreatePaymentProposal({
-      rawText: ctx.msg.text,
-      householdId: member.householdId,
-      memberId: member.id,
-      financeService,
-      householdConfigurationRepository: options.householdConfigurationRepository
-    })
-
-    if (paymentProposal.status === 'clarification') {
-      await ctx.reply(t.paymentClarification)
-      return
-    }
-
-    if (paymentProposal.status === 'unsupported_currency') {
-      await ctx.reply(t.paymentUnsupportedCurrency)
-      return
-    }
-
-    if (paymentProposal.status === 'no_balance') {
-      await ctx.reply(t.paymentNoBalance)
-      return
-    }
-
-    if (paymentProposal.status === 'proposal') {
-      await options.promptRepository.upsertPendingAction({
-        telegramUserId,
-        telegramChatId,
-        action: ASSISTANT_PAYMENT_ACTION,
-        payload: {
-          ...paymentProposal.payload
-        },
-        expiresAt: null
+    if (dedupeClaim) {
+      const claim = await dedupeClaim.repository.claimMessage({
+        householdId: member.householdId,
+        source: DM_ASSISTANT_MESSAGE_SOURCE,
+        sourceMessageKey: dedupeClaim.updateId
      })

-      const amount = Money.fromMinor(
-        BigInt(paymentProposal.payload.amountMinor),
-        paymentProposal.payload.currency
-      )
-      const proposalText = t.paymentProposal(
-        paymentProposal.payload.kind,
-        amount.toMajorString(),
-        amount.currency
-      )
-      options.memoryStore.appendTurn(telegramUserId, {
-        role: 'user',
-        text: ctx.msg.text
-      })
-      options.memoryStore.appendTurn(telegramUserId, {
-        role: 'assistant',
-        text: proposalText
-      })
-
-      await ctx.reply(proposalText, {
-        reply_markup: paymentProposalReplyMarkup(locale, paymentProposal.payload.proposalId)
-      })
-      return
+      if (!claim.claimed) {
+        options.logger?.info(
+          {
+            event: 'assistant.duplicate_update',
+            householdId: member.householdId,
+            telegramUserId,
+            updateId: dedupeClaim.updateId
+          },
+          'Duplicate DM assistant update ignored'
+        )
+        return
+      }
    }

-    if (!options.assistant) {
-      await ctx.reply(t.unavailable)
-      return
-    }
-
-    const memory = options.memoryStore.get(telegramUserId)
-    const householdContext = await buildHouseholdContext({
-      householdId: member.householdId,
-      memberId: member.id,
-      memberDisplayName: member.displayName,
-      locale,
-      householdConfigurationRepository: options.householdConfigurationRepository,
-      financeService
-    })
-    const pendingReply = await sendAssistantProcessingReply(ctx, t.processing)
-
    try {
-      const reply = await options.assistant.respond({
-        locale,
-        householdContext,
-        memorySummary: memory.summary,
-        recentTurns: memory.turns,
-        userMessage: ctx.msg.text
-      })
+      const rateLimit = options.rateLimiter.consume(`${member.householdId}:${telegramUserId}`)
+      if (!rateLimit.allowed) {
+        await ctx.reply(t.rateLimited(formatRetryDelay(locale, rateLimit.retryAfterMs)))
+        return
+      }

-      options.usageTracker.record({
+      const financeService = options.financeServiceForHousehold(member.householdId)
+      const paymentProposal = await maybeCreatePaymentProposal({
+        rawText: ctx.msg.text,
        householdId: member.householdId,
-        telegramUserId,
-        displayName: member.displayName,
-        usage: reply.usage
-      })
-      options.memoryStore.appendTurn(telegramUserId, {
-        role: 'user',
-        text: ctx.msg.text
-      })
-      options.memoryStore.appendTurn(telegramUserId, {
-        role: 'assistant',
-        text: reply.text
+        memberId: member.id,
+        financeService,
+        householdConfigurationRepository: options.householdConfigurationRepository
      })

-      options.logger?.info(
-        {
-          event: 'assistant.reply',
+      if (paymentProposal.status === 'clarification') {
+        await ctx.reply(t.paymentClarification)
+        return
+      }
+
+      if (paymentProposal.status === 'unsupported_currency') {
+        await ctx.reply(t.paymentUnsupportedCurrency)
+        return
+      }
+
+      if (paymentProposal.status === 'no_balance') {
+        await ctx.reply(t.paymentNoBalance)
+        return
+      }
+
+      if (paymentProposal.status === 'proposal') {
+        await options.promptRepository.upsertPendingAction({
+          telegramUserId,
+          telegramChatId,
+          action: ASSISTANT_PAYMENT_ACTION,
+          payload: {
+            ...paymentProposal.payload
+          },
+          expiresAt: null
+        })
+
+        const amount = Money.fromMinor(
+          BigInt(paymentProposal.payload.amountMinor),
+          paymentProposal.payload.currency
+        )
+        const proposalText = t.paymentProposal(
+          paymentProposal.payload.kind,
+          amount.toMajorString(),
+          amount.currency
+        )
+        options.memoryStore.appendTurn(telegramUserId, {
+          role: 'user',
+          text: ctx.msg.text
+        })
+        options.memoryStore.appendTurn(telegramUserId, {
+          role: 'assistant',
+          text: proposalText
+        })
+
+        await ctx.reply(proposalText, {
+          reply_markup: paymentProposalReplyMarkup(locale, paymentProposal.payload.proposalId)
+        })
+        return
+      }
+
+      if (!options.assistant) {
+        await ctx.reply(t.unavailable)
+        return
+      }
+
+      const memory = options.memoryStore.get(telegramUserId)
+      const typingIndicator = startTypingIndicator(ctx)
+      let pendingReply: PendingAssistantReply | null = null
+
+      try {
+        const householdContext = await buildHouseholdContext({
+          householdId: member.householdId,
+          memberId: member.id,
+          memberDisplayName: member.displayName,
+          locale,
+          householdConfigurationRepository: options.householdConfigurationRepository,
+          financeService
+        })
+        pendingReply = await sendAssistantProcessingReply(ctx, t.processing)
+        const reply = await options.assistant.respond({
+          locale,
+          householdContext,
+          memorySummary: memory.summary,
+          recentTurns: memory.turns,
+          userMessage: ctx.msg.text
+        })
+
+        options.usageTracker.record({
          householdId: member.householdId,
          telegramUserId,
-          inputTokens: reply.usage.inputTokens,
-          outputTokens: reply.usage.outputTokens,
-          totalTokens: reply.usage.totalTokens
-        },
-        'DM assistant reply generated'
-      )
+          displayName: member.displayName,
+          usage: reply.usage
+        })
+        options.memoryStore.appendTurn(telegramUserId, {
+          role: 'user',
+          text: ctx.msg.text
+        })
+        options.memoryStore.appendTurn(telegramUserId, {
+          role: 'assistant',
+          text: reply.text
+        })

-      await finalizeAssistantReply(ctx, pendingReply, reply.text)
+        options.logger?.info(
+          {
+            event: 'assistant.reply',
+            householdId: member.householdId,
+            telegramUserId,
+            inputTokens: reply.usage.inputTokens,
+            outputTokens: reply.usage.outputTokens,
+            totalTokens: reply.usage.totalTokens
+          },
+          'DM assistant reply generated'
+        )
+
+        await finalizeAssistantReply(ctx, pendingReply, reply.text)
+      } catch (error) {
+        options.logger?.error(
+          {
+            event: 'assistant.reply_failed',
+            householdId: member.householdId,
+            telegramUserId,
+            error
+          },
+          'DM assistant reply failed'
+        )
+        await finalizeAssistantReply(ctx, pendingReply, t.unavailable)
+      } finally {
+        typingIndicator.stop()
+      }
    } catch (error) {
-      options.logger?.error(
-        {
-          event: 'assistant.reply_failed',
+      if (dedupeClaim) {
+        await dedupeClaim.repository.releaseMessage({
          householdId: member.householdId,
-          telegramUserId,
-          error
-        },
-        'DM assistant reply failed'
-      )
-      await finalizeAssistantReply(ctx, pendingReply, t.unavailable)
+          source: DM_ASSISTANT_MESSAGE_SOURCE,
+          sourceMessageKey: dedupeClaim.updateId
+        })
+      }
+
+      throw error
    }
  })
 }
--- a/apps/bot/src/index.ts
+++ b/apps/bot/src/index.ts
@@ -15,6 +15,7 @@ import {
  createDbAnonymousFeedbackRepository,
  createDbFinanceRepository,
  createDbHouseholdConfigurationRepository,
+  createDbProcessedBotMessageRepository,
  createDbReminderDispatchRepository,
  createDbTelegramPendingActionRepository
 } from '@household/adapters-db'
@@ -85,7 +86,9 @@ const bot = createTelegramBot(
  getLogger('telegram'),
  householdConfigurationRepositoryClient?.repository
 )
-const webhookHandler = webhookCallback(bot, 'std/http')
+const webhookHandler = webhookCallback(bot, 'std/http', {
+  onTimeout: 'return'
+})
 const financeRepositoryClients = new Map<string, ReturnType<typeof createDbFinanceRepository>>()
 const financeServices = new Map<string, ReturnType<typeof createFinanceCommandService>>()
 const paymentConfirmationServices = new Map<
@@ -110,6 +113,10 @@ const telegramPendingActionRepositoryClient =
  runtime.databaseUrl && (runtime.anonymousFeedbackEnabled || runtime.assistantEnabled)
    ? createDbTelegramPendingActionRepository(runtime.databaseUrl!)
    : null
+const processedBotMessageRepositoryClient =
+  runtime.databaseUrl && runtime.assistantEnabled
+    ? createDbProcessedBotMessageRepository(runtime.databaseUrl!)
+    : null
 const assistantMemoryStore = createInMemoryAssistantConversationMemoryStore(
  runtime.assistantMemoryMaxTurns
 )
@@ -203,6 +210,10 @@ if (telegramPendingActionRepositoryClient) {
  shutdownTasks.push(telegramPendingActionRepositoryClient.close)
 }

+if (processedBotMessageRepositoryClient) {
+  shutdownTasks.push(processedBotMessageRepositoryClient.close)
+}
+
 if (runtime.databaseUrl && householdConfigurationRepositoryClient) {
  const purchaseRepositoryClient = createPurchaseMessageRepository(runtime.databaseUrl!)
  shutdownTasks.push(purchaseRepositoryClient.close)
@@ -366,21 +377,40 @@ if (
  householdConfigurationRepositoryClient &&
  telegramPendingActionRepositoryClient
 ) {
-  registerDmAssistant({
-    bot,
-    householdConfigurationRepository: householdConfigurationRepositoryClient.repository,
-    promptRepository: telegramPendingActionRepositoryClient.repository,
-    financeServiceForHousehold,
-    memoryStore: assistantMemoryStore,
-    rateLimiter: assistantRateLimiter,
-    usageTracker: assistantUsageTracker,
-    ...(conversationalAssistant
-      ? {
-          assistant: conversationalAssistant
-        }
-      : {}),
-    logger: getLogger('dm-assistant')
-  })
+  if (processedBotMessageRepositoryClient) {
+    registerDmAssistant({
+      bot,
+      householdConfigurationRepository: householdConfigurationRepositoryClient.repository,
+      messageProcessingRepository: processedBotMessageRepositoryClient.repository,
+      promptRepository: telegramPendingActionRepositoryClient.repository,
+      financeServiceForHousehold,
+      memoryStore: assistantMemoryStore,
+      rateLimiter: assistantRateLimiter,
+      usageTracker: assistantUsageTracker,
+      ...(conversationalAssistant
+        ? {
+            assistant: conversationalAssistant
+          }
+        : {}),
+      logger: getLogger('dm-assistant')
+    })
+  } else {
+    registerDmAssistant({
+      bot,
+      householdConfigurationRepository: householdConfigurationRepositoryClient.repository,
+      promptRepository: telegramPendingActionRepositoryClient.repository,
+      financeServiceForHousehold,
+      memoryStore: assistantMemoryStore,
+      rateLimiter: assistantRateLimiter,
+      usageTracker: assistantUsageTracker,
+      ...(conversationalAssistant
+        ? {
+            assistant: conversationalAssistant
+          }
+        : {}),
+      logger: getLogger('dm-assistant')
+    })
+  }
 }

 const server = createBotWebhookServer({
--- a/apps/bot/src/openai-purchase-interpreter.test.ts
+++ b/apps/bot/src/openai-purchase-interpreter.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, test } from 'bun:test'

 import {
+  buildPurchaseInterpretationInput,
  createOpenAiPurchaseInterpreter,
  type PurchaseInterpretation
 } from './openai-purchase-interpreter'
@@ -15,6 +16,22 @@ function successfulResponse(payload: unknown): Response {
 }

 describe('createOpenAiPurchaseInterpreter', () => {
+  test('includes clarification context when provided', () => {
+    expect(
+      buildPurchaseInterpretationInput('лари', {
+        recentMessages: ['Купил сосисоны, отдал 45 кровных']
+      })
+    ).toBe(
+      [
+        'Recent relevant messages from the same sender in this purchase topic:',
+        '1. Купил сосисоны, отдал 45 кровных',
+        '',
+        'Latest message to interpret:',
+        'лари'
+      ].join('\n')
+    )
+  })
+
  test('parses nested responses api content output', async () => {
    const interpreter = createOpenAiPurchaseInterpreter('test-key', 'gpt-5-mini')
    expect(interpreter).toBeDefined()
@@ -139,4 +156,48 @@ describe('createOpenAiPurchaseInterpreter', () => {
      globalThis.fetch = originalFetch
    }
  })
+
+  test('defaults omitted purchase currency to the household currency', async () => {
+    const interpreter = createOpenAiPurchaseInterpreter('test-key', 'gpt-5-mini')
+    expect(interpreter).toBeDefined()
+
+    const originalFetch = globalThis.fetch
+    globalThis.fetch = (async () =>
+      successfulResponse({
+        output: [
+          {
+            content: [
+              {
+                text: JSON.stringify({
+                  decision: 'clarification',
+                  amountMinor: '4500',
+                  currency: null,
+                  itemDescription: 'сосисоны',
+                  confidence: 85,
+                  clarificationQuestion: 'В какой валюте 45?'
+                })
+              }
+            ]
+          }
+        ]
+      })) as unknown as typeof fetch
+
+    try {
+      const result = await interpreter!('Купил сосисоны, отдал 45 кровных', {
+        defaultCurrency: 'GEL'
+      })
+
+      expect(result).toEqual<PurchaseInterpretation>({
+        decision: 'purchase',
+        amountMinor: 4500n,
+        currency: 'GEL',
+        itemDescription: 'сосисоны',
+        confidence: 85,
+        parserMode: 'llm',
+        clarificationQuestion: null
+      })
+    } finally {
+      globalThis.fetch = originalFetch
+    }
+  })
 })
--- a/apps/bot/src/openai-purchase-interpreter.ts
+++ b/apps/bot/src/openai-purchase-interpreter.ts
@@ -12,10 +12,15 @@ export interface PurchaseInterpretation {
  clarificationQuestion: string | null
 }

+export interface PurchaseClarificationContext {
+  recentMessages: readonly string[]
+}
+
 export type PurchaseMessageInterpreter = (
  rawText: string,
  options: {
    defaultCurrency: 'GEL' | 'USD'
+    clarificationContext?: PurchaseClarificationContext
  }
 ) => Promise<PurchaseInterpretation | null>

@@ -51,6 +56,49 @@ function normalizeConfidence(value: number): number {
  return Math.max(0, Math.min(100, Math.round(scaled)))
 }

+function resolveMissingCurrency(input: {
+  decision: PurchaseInterpretationDecision
+  amountMinor: bigint | null
+  currency: 'GEL' | 'USD' | null
+  itemDescription: string | null
+  defaultCurrency: 'GEL' | 'USD'
+}): 'GEL' | 'USD' | null {
+  if (input.currency !== null) {
+    return input.currency
+  }
+
+  if (
+    input.decision === 'not_purchase' ||
+    input.amountMinor === null ||
+    input.itemDescription === null
+  ) {
+    return null
+  }
+
+  return input.defaultCurrency
+}
+
+export function buildPurchaseInterpretationInput(
+  rawText: string,
+  clarificationContext?: PurchaseClarificationContext
+): string {
+  if (!clarificationContext || clarificationContext.recentMessages.length === 0) {
+    return rawText
+  }
+
+  const history = clarificationContext.recentMessages
+    .map((message, index) => `${index + 1}. ${message}`)
+    .join('\n')
+
+  return [
+    'Recent relevant messages from the same sender in this purchase topic:',
+    history,
+    '',
+    'Latest message to interpret:',
+    rawText
+  ].join('\n')
+}
+
 export function createOpenAiPurchaseInterpreter(
  apiKey: string | undefined,
  model: string
@@ -72,9 +120,12 @@ export function createOpenAiPurchaseInterpreter(
          {
            role: 'system',
            content: [
-              'You classify a single Telegram message from a household shared-purchases topic.',
-              'Decide whether the message is a real shared purchase, needs clarification, or is not a shared purchase at all.',
-              `The household default currency is ${options.defaultCurrency}, but do not assume that omitted currency means ${options.defaultCurrency}.`,
+              'You classify a purchase candidate from a household shared-purchases topic.',
+              'Decide whether the latest message is a real shared purchase, needs clarification, or is not a shared purchase at all.',
+              `The household default currency is ${options.defaultCurrency}. If a real purchase clearly omits currency, use ${options.defaultCurrency}.`,
+              'If recent messages from the same sender are provided, treat them as clarification context for the latest message.',
+              'If the latest message is a complete standalone purchase on its own, ignore the earlier clarification context.',
+              'If the latest message answers a previous clarification, combine it with the earlier messages to resolve the purchase.',
              'Use clarification when the amount, currency, item, or overall intent is missing or uncertain.',
              'Return a clarification question in the same language as the user message when clarification is needed.',
              'Return only JSON that matches the schema.'
@@ -82,7 +133,7 @@ export function createOpenAiPurchaseInterpreter(
          },
          {
            role: 'user',
-            content: rawText
+            content: buildPurchaseInterpretationInput(rawText, options.clarificationContext)
          }
        ],
        text: {
@@ -165,19 +216,35 @@ export function createOpenAiPurchaseInterpreter(
      return null
    }

+    const amountMinor = asOptionalBigInt(parsedJson.amountMinor)
+    const itemDescription = normalizeOptionalText(parsedJson.itemDescription)
+    const currency = resolveMissingCurrency({
+      decision: parsedJson.decision,
+      amountMinor,
+      currency: normalizeCurrency(parsedJson.currency),
+      itemDescription,
+      defaultCurrency: options.defaultCurrency
+    })
+    const decision =
+      parsedJson.decision === 'clarification' &&
+      amountMinor !== null &&
+      currency !== null &&
+      itemDescription
+        ? 'purchase'
+        : parsedJson.decision
    const clarificationQuestion = normalizeOptionalText(parsedJson.clarificationQuestion)
-    if (parsedJson.decision === 'clarification' && !clarificationQuestion) {
+    if (decision === 'clarification' && !clarificationQuestion) {
      return null
    }

    return {
-      decision: parsedJson.decision,
-      amountMinor: asOptionalBigInt(parsedJson.amountMinor),
-      currency: normalizeCurrency(parsedJson.currency),
-      itemDescription: normalizeOptionalText(parsedJson.itemDescription),
+      decision,
+      amountMinor,
+      currency,
+      itemDescription,
      confidence: normalizeConfidence(parsedJson.confidence),
      parserMode: 'llm',
-      clarificationQuestion
+      clarificationQuestion: decision === 'clarification' ? clarificationQuestion : null
    }
  }
 }
--- a/apps/bot/src/purchase-topic-ingestion.test.ts
+++ b/apps/bot/src/purchase-topic-ingestion.test.ts
@@ -447,8 +447,16 @@ describe('registerPurchaseTopicIngestion', () => {

    await bot.handleUpdate(purchaseUpdate('Bought toilet paper 30 gel') as never)

-    expect(calls).toHaveLength(2)
+    expect(calls).toHaveLength(3)
    expect(calls[0]).toMatchObject({
+      method: 'sendChatAction',
+      payload: {
+        chat_id: Number(config.householdChatId),
+        action: 'typing',
+        message_thread_id: config.purchaseTopicId
+      }
+    })
+    expect(calls[1]).toMatchObject({
      method: 'sendMessage',
      payload: {
        chat_id: Number(config.householdChatId),
@@ -458,11 +466,11 @@ describe('registerPurchaseTopicIngestion', () => {
        }
      }
    })
-    expect(calls[1]).toMatchObject({
+    expect(calls[2]).toMatchObject({
      method: 'editMessageText',
      payload: {
        chat_id: Number(config.householdChatId),
-        message_id: 1,
+        message_id: 2,
        text: 'I think this shared purchase was: toilet paper - 30.00 GEL. Confirm or cancel below.',
        reply_markup: {
          inline_keyboard: [
--- a/apps/bot/src/purchase-topic-ingestion.ts
+++ b/apps/bot/src/purchase-topic-ingestion.ts
@@ -1,5 +1,5 @@
 import { instantFromEpochSeconds, instantToDate, Money, type Instant } from '@household/domain'
-import { and, eq } from 'drizzle-orm'
+import { and, desc, eq } from 'drizzle-orm'
 import type { Bot, Context } from 'grammy'
 import type { Logger } from '@household/observability'
 import type {
@@ -13,6 +13,7 @@ import type {
  PurchaseInterpretation,
  PurchaseMessageInterpreter
 } from './openai-purchase-interpreter'
+import { startTypingIndicator } from './telegram-chat-action'

 const PURCHASE_CONFIRM_CALLBACK_PREFIX = 'purchase:confirm:'
 const PURCHASE_CANCEL_CALLBACK_PREFIX = 'purchase:cancel:'
@@ -146,6 +147,9 @@ interface PurchasePersistenceDecision {
  needsReview: boolean
 }

+const CLARIFICATION_CONTEXT_MAX_AGE_MS = 30 * 60_000
+const MAX_CLARIFICATION_CONTEXT_MESSAGES = 3
+
 function normalizeInterpretation(
  interpretation: PurchaseInterpretation | null,
  parserError: string | null
@@ -459,6 +463,47 @@ export function createPurchaseMessageRepository(databaseUrl: string): {
    prepare: false
  })

+  async function getClarificationContext(
+    record: PurchaseTopicRecord
+  ): Promise<readonly string[] | undefined> {
+    const rows = await db
+      .select({
+        rawText: schema.purchaseMessages.rawText,
+        messageSentAt: schema.purchaseMessages.messageSentAt,
+        ingestedAt: schema.purchaseMessages.ingestedAt
+      })
+      .from(schema.purchaseMessages)
+      .where(
+        and(
+          eq(schema.purchaseMessages.householdId, record.householdId),
+          eq(schema.purchaseMessages.senderTelegramUserId, record.senderTelegramUserId),
+          eq(schema.purchaseMessages.telegramThreadId, record.threadId),
+          eq(schema.purchaseMessages.processingStatus, 'clarification_needed')
+        )
+      )
+      .orderBy(
+        desc(schema.purchaseMessages.messageSentAt),
+        desc(schema.purchaseMessages.ingestedAt)
+      )
+      .limit(MAX_CLARIFICATION_CONTEXT_MESSAGES)
+
+    const currentMessageTimestamp = instantToDate(record.messageSentAt).getTime()
+    const recentMessages = rows
+      .filter((row) => {
+        const referenceTimestamp = (row.messageSentAt ?? row.ingestedAt)?.getTime()
+        return (
+          referenceTimestamp !== undefined &&
+          currentMessageTimestamp - referenceTimestamp >= 0 &&
+          currentMessageTimestamp - referenceTimestamp <= CLARIFICATION_CONTEXT_MAX_AGE_MS
+        )
+      })
+      .reverse()
+      .map((row) => row.rawText.trim())
+      .filter((value) => value.length > 0)
+
+    return recentMessages.length > 0 ? recentMessages : undefined
+  }
+
  async function getStoredMessage(
    purchaseMessageId: string
  ): Promise<StoredPurchaseMessageRow | null> {
@@ -595,10 +640,18 @@ export function createPurchaseMessageRepository(databaseUrl: string): {

      const senderMemberId = matchedMember[0]?.id ?? null
      let parserError: string | null = null
+      const clarificationContext = interpreter ? await getClarificationContext(record) : undefined

      const interpretation = interpreter
        ? await interpreter(record.rawText, {
-            defaultCurrency: defaultCurrency ?? 'GEL'
+            defaultCurrency: defaultCurrency ?? 'GEL',
+            ...(clarificationContext
+              ? {
+                  clarificationContext: {
+                    recentMessages: clarificationContext
+                  }
+                }
+              : {})
          }).catch((error) => {
            parserError = error instanceof Error ? error.message : 'Unknown interpreter error'
            return null
@@ -988,6 +1041,8 @@ export function registerPurchaseTopicIngestion(
      return
    }

+    const typingIndicator = options.interpreter ? startTypingIndicator(ctx) : null
+
    try {
      const pendingReply = options.interpreter
        ? await sendPurchaseProcessingReply(ctx, getBotTranslations('en').purchase.processing)
@@ -1006,6 +1061,8 @@ export function registerPurchaseTopicIngestion(
        },
        'Failed to ingest purchase topic message'
      )
+    } finally {
+      typingIndicator?.stop()
    }
  })
 }
@@ -1049,6 +1106,8 @@ export function registerConfiguredPurchaseTopicIngestion(
      return
    }

+    const typingIndicator = options.interpreter ? startTypingIndicator(ctx) : null
+
    try {
      const billingSettings = await householdConfigurationRepository.getHouseholdBillingSettings(
        record.householdId
@@ -1080,6 +1139,8 @@ export function registerConfiguredPurchaseTopicIngestion(
        },
        'Failed to ingest purchase topic message'
      )
+    } finally {
+      typingIndicator?.stop()
    }
  })
 }
--- a/apps/bot/src/telegram-chat-action.ts
+++ b/apps/bot/src/telegram-chat-action.ts
@@ -0,0 +1,55 @@
+import type { Context } from 'grammy'
+
+const TYPING_REFRESH_INTERVAL_MS = 4_000
+
+export interface ActiveChatAction {
+  stop(): void
+}
+
+export function startTypingIndicator(ctx: Context): ActiveChatAction {
+  const chatId = ctx.chat?.id
+  if (!chatId) {
+    return {
+      stop() {}
+    }
+  }
+
+  const messageThreadId =
+    ctx.msg && 'message_thread_id' in ctx.msg ? ctx.msg.message_thread_id : undefined
+
+  let active = true
+
+  const sendTypingAction = async () => {
+    if (!active) {
+      return
+    }
+
+    const options =
+      messageThreadId !== undefined
+        ? {
+            message_thread_id: messageThreadId
+          }
+        : undefined
+
+    try {
+      await ctx.api.sendChatAction(chatId, 'typing', options)
+    } catch {}
+  }
+
+  void sendTypingAction()
+
+  const interval = setInterval(() => {
+    void sendTypingAction()
+  }, TYPING_REFRESH_INTERVAL_MS)
+
+  if (typeof interval.unref === 'function') {
+    interval.unref()
+  }
+
+  return {
+    stop() {
+      active = false
+      clearInterval(interval)
+    }
+  }
+}
--- a/packages/adapters-db/src/index.ts
+++ b/packages/adapters-db/src/index.ts
@@ -1,5 +1,6 @@
 export { createDbAnonymousFeedbackRepository } from './anonymous-feedback-repository'
 export { createDbFinanceRepository } from './finance-repository'
 export { createDbHouseholdConfigurationRepository } from './household-config-repository'
+export { createDbProcessedBotMessageRepository } from './processed-bot-message-repository'
 export { createDbReminderDispatchRepository } from './reminder-dispatch-repository'
 export { createDbTelegramPendingActionRepository } from './telegram-pending-action-repository'
--- a/packages/adapters-db/src/processed-bot-message-repository.ts
+++ b/packages/adapters-db/src/processed-bot-message-repository.ts
@@ -0,0 +1,58 @@
+import { and, eq } from 'drizzle-orm'
+
+import { createDbClient, schema } from '@household/db'
+import type { ProcessedBotMessageRepository } from '@household/ports'
+
+export function createDbProcessedBotMessageRepository(databaseUrl: string): {
+  repository: ProcessedBotMessageRepository
+  close: () => Promise<void>
+} {
+  const { db, queryClient } = createDbClient(databaseUrl, {
+    max: 3,
+    prepare: false
+  })
+
+  const repository: ProcessedBotMessageRepository = {
+    async claimMessage(input) {
+      const rows = await db
+        .insert(schema.processedBotMessages)
+        .values({
+          householdId: input.householdId,
+          source: input.source,
+          sourceMessageKey: input.sourceMessageKey,
+          payloadHash: input.payloadHash ?? null
+        })
+        .onConflictDoNothing({
+          target: [
+            schema.processedBotMessages.householdId,
+            schema.processedBotMessages.source,
+            schema.processedBotMessages.sourceMessageKey
+          ]
+        })
+        .returning({ id: schema.processedBotMessages.id })
+
+      return {
+        claimed: rows.length > 0
+      }
+    },
+
+    async releaseMessage(input) {
+      await db
+        .delete(schema.processedBotMessages)
+        .where(
+          and(
+            eq(schema.processedBotMessages.householdId, input.householdId),
+            eq(schema.processedBotMessages.source, input.source),
+            eq(schema.processedBotMessages.sourceMessageKey, input.sourceMessageKey)
+          )
+        )
+    }
+  }
+
+  return {
+    repository,
+    close: async () => {
+      await queryClient.end({ timeout: 5 })
+    }
+  }
+}
--- a/packages/ports/src/index.ts
+++ b/packages/ports/src/index.ts
@@ -6,6 +6,12 @@ export {
  type ReminderTarget,
  type ReminderType
 } from './reminders'
+export type {
+  ClaimProcessedBotMessageInput,
+  ClaimProcessedBotMessageResult,
+  ProcessedBotMessageRepository,
+  ReleaseProcessedBotMessageInput
+} from './processed-bot-messages'
 export {
  HOUSEHOLD_TOPIC_ROLES,
  type HouseholdConfigurationRepository,
--- a/packages/ports/src/processed-bot-messages.ts
+++ b/packages/ports/src/processed-bot-messages.ts
@@ -0,0 +1,21 @@
+export interface ClaimProcessedBotMessageInput {
+  householdId: string
+  source: string
+  sourceMessageKey: string
+  payloadHash?: string | null
+}
+
+export interface ClaimProcessedBotMessageResult {
+  claimed: boolean
+}
+
+export interface ReleaseProcessedBotMessageInput {
+  householdId: string
+  source: string
+  sourceMessageKey: string
+}
+
+export interface ProcessedBotMessageRepository {
+  claimMessage(input: ClaimProcessedBotMessageInput): Promise<ClaimProcessedBotMessageResult>
+  releaseMessage(input: ReleaseProcessedBotMessageInput): Promise<void>
+}