Deploy fast-agent A2A demo

Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.12-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    FAST_AGENT_BUCKET_MOUNT=/data
+
+WORKDIR /app
+COPY app.py /app/app.py
+
+CMD ["python", "/app/app.py"]

README.md

@@ -1,10 +1,17 @@
 ---
-title: A2a Demo
-emoji: 📈
-colorFrom: purple
-colorTo: red
+title: a2a-demo
+emoji: 🕸️
+colorFrom: blue
+colorTo: purple
 sdk: docker
+app_port: 7860
 pinned: false
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# a2a-demo
+
+fast-agent A2A server with Hugging Face bearer/OAuth pass-through.
+
+The Space mounts an `a2a-demo` bucket at `/data`, installs the latest
+`fast-agent-mcp` wheel from `/data/wheels`, and serves the AgentCard in
+`/data/agent-cards`.

app.py

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+from __future__ import annotations
+
+import glob
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+BUCKET_MOUNT = Path(os.environ.get("FAST_AGENT_BUCKET_MOUNT", "/data"))
+CARD_DIR = BUCKET_MOUNT / "agent-cards"
+
+
+def latest_wheel() -> str:
+    wheels = sorted(
+        glob.glob(str(BUCKET_MOUNT / "wheels" / "fast_agent_mcp-*.whl")),
+        key=os.path.getmtime,
+        reverse=True,
+    )
+    if not wheels:
+        raise RuntimeError(f"No fast-agent-mcp wheel found under {BUCKET_MOUNT / 'wheels'}")
+    return wheels[0]
+
+
+def main() -> None:
+    wheel = latest_wheel()
+    subprocess.check_call([sys.executable, "-m", "pip", "install", "--upgrade", wheel])
+
+    os.environ.setdefault("FAST_AGENT_SERVE_OAUTH", "huggingface")
+    os.environ.setdefault("FAST_AGENT_OAUTH_SCOPES", "access")
+    os.environ.setdefault("PYTHONUNBUFFERED", "1")
+
+    cmd = [
+        sys.executable,
+        "-m",
+        "fast_agent.cli.__main__",
+        "serve",
+        "a2a",
+        "--name",
+        os.environ.get("FAST_AGENT_A2A_NAME", "a2a-demo"),
+        "--host",
+        "0.0.0.0",
+        "--port",
+        os.environ.get("PORT", "7860"),
+        "--instance-scope",
+        os.environ.get("FAST_AGENT_A2A_INSTANCE_SCOPE", "connection"),
+        "--agent-cards",
+        str(CARD_DIR),
+        "--model",
+        os.environ.get("FAST_AGENT_MODEL", "kimi"),
+    ]
+    os.execv(sys.executable, cmd)
+
+
+if __name__ == "__main__":
+    main()