M4 implementada e backlog validado

RI/agents/example_agent/backends/sales_agent/__init__.py

@@ -0,0 +1,43 @@
+"""Sales backend for the Modo A multiagent demo (EP-13-T05, ADR-024).
+
+A thin factory around the same `ExampleAgent` (EP-13-T01) every other
+example-agent test already uses -- bound to a Sales MCP Client identity
+(`sales-read-agent`/`sales-write-agent`, EP-01). Nothing about `ExampleAgent`
+itself is Sales-specific; only the bearer token and system prompt differ
+from `finance_agent`, which is the point (ADR-023: the security boundary is
+identity/credential, never code path or prompt text).
+"""
+
+from __future__ import annotations
+
+from openai import AsyncOpenAI
+
+from emcp_bus.audit.sink import AuditSink
+from example_agent.agent import ExampleAgent
+
+SYSTEM_PROMPT = (
+    "You are a helpful assistant for a sales team. Use only the tools you are "
+    "given -- never claim to have capabilities outside them, and never invent "
+    "a tool name that wasn't offered to you. If the customer wants to pay an "
+    "invoice or discuss a payment, tell them you will connect them with "
+    "billing -- you cannot process payments yourself."
+)
+
+
+def build_sales_agent(
+    *,
+    gateway_url: str,
+    bearer_token: str,
+    llm_client: AsyncOpenAI,
+    model: str,
+    audit_sink: AuditSink | None = None,
+) -> ExampleAgent:
+    return ExampleAgent(
+        gateway_url=gateway_url,
+        bearer_token=bearer_token,
+        llm_client=llm_client,
+        model=model,
+        agent_name="sales_agent",
+        system_prompt=SYSTEM_PROMPT,
+        audit_sink=audit_sink,
+    )