flowchart TD
    HOST["Host application"] --> CLIENT["client.py\n(fastmcp.Client + elicitation_handler)"]
    CLIENT <-->|"Streamable HTTP\nAuthorization: Bearer <signed JWT>"| SERVER

    subgraph Server["server.py — FastMCP('SecureAgentServer')"]
        AUTH["JWTVerifier (HS256)\nissuer + audience + signature checked"]
        G1["Guardrail 1: sanitize_untrusted_text()\napplied to ticket body/subject"]
        G2["Guardrail 2: verify_tool_manifest()\nchecked at startup, refuses to start on mismatch"]
        TOOLS["Tools: search_tickets, lookup_customer_account,\nclose_ticket (elicitation-gated)"]
        AUTH --> TOOLS
        TOOLS --> G1
    end
    G2 -.->|startup check| SERVER

    TOOLS --> TICKETS[("data/tickets.json\n(untrusted customer text)")]
    TOOLS --> CUSTOMERS[("data/customers.json\n('internal API')")]

pip install -r requirements.txt

# 1. Set the JWT signing secret (never commit the real value; see .env.example)
export MCP_JWT_SECRET="a-long-random-secret-at-least-32-characters"

# 2. Generate the pinned tool-integrity manifest (a deliberate, manual step —
#    see docs/threat-model.md Risk #2)
python generate_manifest.py

# 3. Run the server
python server.py

# 4. In another terminal (same MCP_JWT_SECRET exported)
python client.py --auto-confirm   # non-interactive demo
python client.py                  # interactive: real yes/no confirmation prompts