From 301a0b687aed944d3e201fcaf59947704501126c Mon Sep 17 00:00:00 2001
From: Carlos Escalante <cescalante2988@gmail.com>
Date: Tue, 14 Jul 2026 21:48:54 -0600
Subject: [PATCH] Use Responses API with Luna by default

---
 .env.example                       |  2 +-
 .github/workflows/deploy.yml       |  2 +-
 backend/app/agent/agent.py         |  6 ++++--
 backend/app/config.py              |  2 +-
 backend/tests/test_agent_config.py | 14 ++++++++++++++
 docker-compose.prod.yml            |  2 +-
 docker-compose.yml                 |  2 +-
 7 files changed, 23 insertions(+), 7 deletions(-)
 create mode 100644 backend/tests/test_agent_config.py

diff --git a/.env.example b/.env.example
index d520e6f..5e12477 100644
--- a/.env.example
+++ b/.env.example
@@ -23,4 +23,4 @@ VAPID_PUBLIC_KEY=
 
 # ── AI agent (optional in dev; Asistente won't work without it) ──────────────
 OPENAI_API_KEY=
-AGENT_MODEL=gpt-5.4-mini
+AGENT_MODEL=gpt-5.6-luna
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ab8377e..e00d450 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -51,7 +51,7 @@ jobs:
           VAPID_PRIVATE_KEY=${{ secrets.VAPID_PRIVATE_KEY }}
           VAPID_PUBLIC_KEY=${{ secrets.VAPID_PUBLIC_KEY }}
           OPENAI_API_KEY=${{ secrets.OPENAI_API_KEY }}
-          AGENT_MODEL=gpt-5.4-mini
+          AGENT_MODEL=gpt-5.6-luna
           ENVEOF
           sed -i 's/^[[:space:]]*//' .env.prod
 
diff --git a/backend/app/agent/agent.py b/backend/app/agent/agent.py
index 7f9ed50..d0e27c6 100644
--- a/backend/app/agent/agent.py
+++ b/backend/app/agent/agent.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from agent_framework import Agent
-from agent_framework.openai import OpenAIChatCompletionClient
+from agent_framework.openai import OpenAIChatClient
 
 from app.config import settings
 from app.agent.tools import TOOLS
@@ -83,7 +83,9 @@ Generative UI — render tools:
 
 
 def build_agent() -> Agent:
-    client = OpenAIChatCompletionClient(
+    # Use the Responses API for every configured model. It preserves one tool
+    # transport across model changes and supports Luna's tool-result turns.
+    client = OpenAIChatClient(
         api_key=settings.OPENAI_API_KEY,
         model=settings.AGENT_MODEL,
     )
diff --git a/backend/app/config.py b/backend/app/config.py
index 3b168f9..216bad0 100644
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -20,7 +20,7 @@ class Settings(BaseSettings):
     VAPID_PUBLIC_KEY: str = ""
     VAPID_CLAIM_EMAIL: str = "mailto:admin@wealth.cescalante.dev"
     OPENAI_API_KEY: str = ""
-    AGENT_MODEL: str = "gpt-5.4-mini"
+    AGENT_MODEL: str = "gpt-5.6-luna"
 
     @property
     def cors_origins_list(self) -> list[str]:
diff --git a/backend/tests/test_agent_config.py b/backend/tests/test_agent_config.py
new file mode 100644
index 0000000..05ebecb
--- /dev/null
+++ b/backend/tests/test_agent_config.py
@@ -0,0 +1,14 @@
+"""Assistant transport configuration."""
+
+from agent_framework.openai import OpenAIChatClient
+
+from app.agent import agent as agent_module
+
+
+def test_agent_uses_responses_client_for_the_configured_model(monkeypatch):
+    monkeypatch.setattr(agent_module.settings, "AGENT_MODEL", "gpt-5.6-luna")
+
+    agent = agent_module.build_agent()
+
+    assert isinstance(agent.client, OpenAIChatClient)
+    assert agent.client.model == "gpt-5.6-luna"
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 38b14ce..c005bc8 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -31,7 +31,7 @@ services:
       VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY}
       VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY}
       OPENAI_API_KEY: ${OPENAI_API_KEY}
-      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.4-mini}
+      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.6-luna}
       # MAF 1.6+ enables OTel instrumentation by default; keep it off explicitly.
       ENABLE_INSTRUMENTATION: "false"
     expose:
diff --git a/docker-compose.yml b/docker-compose.yml
index baf308c..be369a4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -30,7 +30,7 @@ services:
       VAPID_PRIVATE_KEY: ${VAPID_PRIVATE_KEY:-}
       VAPID_PUBLIC_KEY: ${VAPID_PUBLIC_KEY:-}
       OPENAI_API_KEY: ${OPENAI_API_KEY:-}
-      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.4-mini}
+      AGENT_MODEL: ${AGENT_MODEL:-gpt-5.6-luna}
       # MAF 1.6+ enables OTel instrumentation by default; keep it off explicitly.
       ENABLE_INSTRUMENTATION: "false"
     ports: