title: Anthropic thinking error recovery after replay-safe read

scenario:
  id: anthropic-thinking-error-recovery-replay-safe-read
  surface: runtime
  coverage:
    primary:
      - anthropic.signed-redacted-thinking-replay
    secondary:
      - runtime.retry-policy
  gatewayConfigPatch:
    agents:
      defaults:
        models:
          anthropic/claude-opus-4-8:
            params: {}
  objective: Verify an Anthropic stream error after signed thinking and a replay-safe read retries the same prompt into a visible answer.
  successCriteria:
    - Scenario is mock-openai only so live lanes do not pick it up implicitly.
    - The agent performs a replay-safe read before the Anthropic stream error.
    - The runtime retries the same prompt without injecting the visible-answer continuation instruction.
    - The final visible reply contains the exact recovery marker.
  docsRefs:
    - docs/help/testing.md
  codeRefs:
    - extensions/qa-lab/src/providers/mock-openai/server.ts
    - src/agents/embedded-agent-runner/run/incomplete-turn.ts
  execution:
    kind: flow
    summary: Verify Anthropic stream errors after signed thinking recover after a replay-safe read.
    config:
      requiredProviderMode: mock-openai
      anthropicModelRef: anthropic/claude-opus-4-8
      promptSnippet: Anthropic thinking error QA check
      prompt: "Anthropic thinking error QA check: read QA_KICKOFF_TASK.md, then answer with exactly ANTHROPIC-THINKING-ERROR-RECOVERED-OK."
      expectedReply: ANTHROPIC-THINKING-ERROR-RECOVERED-OK
      visibleAnswerRetryNeedle: The previous attempt did not produce a user-visible answer.

flow:
  steps:
    - name: retries a thinking-only Anthropic error after a replay-safe read
      actions:
        - assert:
            expr: "env.providerMode === 'mock-openai'"
            message: this seeded scenario is mock-openai only
        - call: waitForGatewayHealthy
          args:
            - ref: env
            - 60000
        - call: reset
        - set: requestCountBefore
          value:
            expr: "env.mock ? (await fetchJson(`${env.mock.baseUrl}/debug/requests`)).length : 0"
        - set: sessionKey
          value:
            expr: "`agent:qa:anthropic-thinking-error:${randomUUID().slice(0, 8)}`"
        - set: modelAck
          value:
            expr: "await env.gateway.call('sessions.patch', { key: sessionKey, model: config.anthropicModelRef }, { timeoutMs: liveTurnTimeoutMs(env, 45000) })"
        - call: runAgentPrompt
          args:
            - ref: env
            - sessionKey:
                ref: sessionKey
              message:
                expr: config.prompt
              timeoutMs:
                expr: liveTurnTimeoutMs(env, 45000)
        - call: waitForOutboundMessage
          saveAs: outbound
          args:
            - ref: state
            - lambda:
                params: [candidate]
                expr: "candidate.conversation.id === 'qa-operator' && candidate.text.includes(config.expectedReply)"
            - expr: liveTurnTimeoutMs(env, 30000)
        - assert:
            expr: "outbound.text.includes(config.expectedReply)"
            message:
              expr: "`missing Anthropic thinking-error recovery marker: ${outbound.text}`"
        - if:
            expr: "Boolean(env.mock)"
            then:
              - set: scenarioRequests
                value:
                  expr: "(await fetchJson(`${env.mock.baseUrl}/debug/requests`)).slice(requestCountBefore)"
              - assert:
                  expr: "scenarioRequests.some((request) => String(request.allInputText ?? '').includes(config.promptSnippet) && request.providerVariant === 'anthropic' && request.plannedToolName === 'read')"
                  message: expected replay-safe read request on the Anthropic mock route
              - assert:
                  expr: "scenarioRequests.filter((request) => String(request.allInputText ?? '').includes(config.promptSnippet) && request.providerVariant === 'anthropic').length >= 3"
                  message: expected initial read, terminal-error attempt, and same-prompt retry
              - assert:
                  expr: "!scenarioRequests.some((request) => String(request.allInputText ?? '').includes(config.visibleAnswerRetryNeedle))"
                  message: expected same-prompt retry, not visible-answer continuation retry
      detailsExpr: "env.mock ? `${outbound.text}\\nrequests=${String(scenarioRequests?.length ?? 0)}` : outbound.text"