title: Model switch follow-up

scenario:
  id: model-switch-follow-up
  surface: models
  coverage:
    primary:
      - models.switching
    secondary:
      - runtime.session-continuity
  objective: Verify the agent can switch to a different configured model and continue coherently.
  successCriteria:
    - Agent reflects the model switch request.
    - Follow-up answer remains coherent with prior context.
    - Final report notes whether the switch actually happened.
  docsRefs:
    - docs/help/testing.md
    - docs/web/dashboard.md
  codeRefs:
    - extensions/qa-lab/src/report.ts
  execution:
    kind: flow
    summary: Verify the agent can switch to a different configured model and continue coherently.
    config:
      initialPrompt: "Say hello from the default configured model."
      followupPrompt: "Continue the exchange after switching models and note the handoff."

flow:
  steps:
    - name: runs on the default configured model
      actions:
        - call: reset
        - call: runAgentPrompt
          args:
            - ref: env
            - sessionKey: agent:qa:model-switch
              message:
                expr: config.initialPrompt
              timeoutMs:
                expr: liveTurnTimeoutMs(env, 30000)
        - call: waitForOutboundMessage
          saveAs: outbound
          args:
            - ref: state
            - lambda:
                params: [candidate]
                expr: "candidate.conversation.id === 'qa-operator'"
      detailsExpr: "env.mock ? String((await fetchJson(`${env.mock.baseUrl}/debug/last-request`))?.body?.model ?? '') : outbound.text"
    - name: switches to the alternate model and continues
      actions:
        - set: alternate
          value:
            expr: splitModelRef(env.alternateModel)
        - call: runAgentPrompt
          args:
            - ref: env
            - sessionKey: agent:qa:model-switch
              message:
                expr: config.followupPrompt
              provider:
                expr: alternate?.provider
              model:
                expr: alternate?.model
              timeoutMs:
                expr: resolveQaLiveTurnTimeoutMs(env, 30000, env.alternateModel)
        - call: waitForCondition
          saveAs: outbound
          args:
            - lambda:
                expr: "state.getSnapshot().messages.filter((candidate) => candidate.direction === 'outbound' && candidate.conversation.id === 'qa-operator' && (() => { const lower = normalizeLowercaseStringOrEmpty(candidate.text); return lower.includes('switch') || lower.includes('handoff'); })()).at(-1)"
            - expr: resolveQaLiveTurnTimeoutMs(env, 20000, env.alternateModel)
        - assert:
            expr: "!env.mock || ((await fetchJson(`${env.mock.baseUrl}/debug/last-request`))?.body?.model === 'gpt-5.5-alt')"
            message:
              expr: "`expected gpt-5.5-alt, got ${String((await fetchJson(`${env.mock.baseUrl}/debug/last-request`))?.body?.model ?? '')}`"
      detailsExpr: outbound.text