forked from molecule-ai/molecule-core
24fec62d7f
Forked clean from public hackathon repo (Starfire-AgentTeam, BSL 1.1) with full rebrand to Molecule AI under github.com/Molecule-AI/molecule-monorepo. Brand: Starfire → Molecule AI. Slug: starfire / agent-molecule → molecule. Env vars: STARFIRE_* → MOLECULE_*. Go module: github.com/agent-molecule/platform → github.com/Molecule-AI/molecule-monorepo/platform. Python packages: starfire_plugin → molecule_plugin, starfire_agent → molecule_agent. DB: agentmolecule → molecule. History truncated; see public repo for prior commits and contributor attribution. Verified green: go test -race ./... (platform), pytest (workspace-template 1129 + sdk 132), vitest (canvas 352), build (mcp). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
"""A2A protocol client — peer discovery, messaging, and workspace info.
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Shared constants (WORKSPACE_ID, PLATFORM_URL) live here so that
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a2a_tools and a2a_mcp_server can import them from a single place.
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"""
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import logging
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import os
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import uuid
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import httpx
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logger = logging.getLogger(__name__)
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WORKSPACE_ID = os.environ.get("WORKSPACE_ID", "")
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PLATFORM_URL = os.environ.get("PLATFORM_URL", "http://platform:8080")
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# Cache workspace ID → name mappings (populated by list_peers calls)
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_peer_names: dict[str, str] = {}
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# Sentinel prefix for errors originating from send_a2a_message / child agents.
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# Used by delegate_task to distinguish real errors from normal response text.
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_A2A_ERROR_PREFIX = "[A2A_ERROR] "
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async def discover_peer(target_id: str) -> dict | None:
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"""Discover a peer workspace's URL via the platform registry."""
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async with httpx.AsyncClient(timeout=10.0) as client:
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try:
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resp = await client.get(
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f"{PLATFORM_URL}/registry/discover/{target_id}",
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headers={"X-Workspace-ID": WORKSPACE_ID},
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)
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if resp.status_code == 200:
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return resp.json()
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return None
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except Exception as e:
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logger.error(f"Discovery failed for {target_id}: {e}")
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return None
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async def send_a2a_message(target_url: str, message: str) -> str:
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"""Send an A2A message/send to a target workspace."""
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async with httpx.AsyncClient(timeout=None) as client:
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try:
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resp = await client.post(
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target_url,
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json={
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"jsonrpc": "2.0",
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"id": str(uuid.uuid4()),
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"method": "message/send",
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"params": {
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"message": {
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"role": "user",
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"messageId": str(uuid.uuid4()),
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"parts": [{"kind": "text", "text": message}],
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}
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},
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},
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)
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data = resp.json()
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if "result" in data:
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parts = data["result"].get("parts", [])
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text = parts[0].get("text", "") if parts else "(no response)"
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# Tag child-reported errors so the caller can detect them reliably
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if text.startswith("Agent error:"):
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return f"{_A2A_ERROR_PREFIX}{text}"
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return text
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elif "error" in data:
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return f"{_A2A_ERROR_PREFIX}{data['error'].get('message', 'unknown')}"
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return str(data)
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except Exception as e:
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return f"{_A2A_ERROR_PREFIX}{e}"
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async def get_peers() -> list[dict]:
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"""Get this workspace's peers from the platform registry."""
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async with httpx.AsyncClient(timeout=10.0) as client:
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try:
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resp = await client.get(f"{PLATFORM_URL}/registry/{WORKSPACE_ID}/peers")
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if resp.status_code == 200:
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return resp.json()
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return []
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except Exception:
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return []
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async def get_workspace_info() -> dict:
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"""Get this workspace's info from the platform."""
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async with httpx.AsyncClient(timeout=10.0) as client:
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try:
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resp = await client.get(f"{PLATFORM_URL}/workspaces/{WORKSPACE_ID}")
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if resp.status_code == 200:
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return resp.json()
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return {"error": "not found"}
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except Exception as e:
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return {"error": str(e)}
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