feat: deep-agent canvas, live observability, and multi-environment tooling

Self-hosted platform for building, testing, and shipping LangChain/LangGraph agents. Deep-agent sub-agents on the canvas, a live tracing/observability timeline, auto-provisioned built-in tools with import/export, per-environment tool variables, streamed evaluations, and per-user auth token forwarding.
2026-07-28 01:49:19 +05:30
commit ae67bff5a3
350 changed files with 58244 additions and 0 deletions
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+"""Subworkflow node: a parent workflow runs a referenced child as a reusable component."""
+
+from __future__ import annotations
+
+from langchain_core.messages import HumanMessage
+from langgraph.checkpoint.memory import InMemorySaver
+
+from forge.engine.compiler import compile_workflow
+from forge.services.runtime import make_runtime_ctx
+
+_CHILD = {
+    "id": "child", "version": 1,
+    "state": {"messages": {"type": "list[message]", "reducer": "add_messages"}},
+    "entry_node": "agent",
+    "nodes": [
+        {"id": "agent", "type": "agent", "config": {"flavor": "agent", "model": "fake:Child answered."}},
+        {"id": "end", "type": "end", "config": {}},
+    ],
+    "edges": [{"source": "agent", "target": "end"}],
+}
+
+_PARENT = {
+    "id": "parent", "version": 1,
+    "state": {"messages": {"type": "list[message]", "reducer": "add_messages"}},
+    "entry_node": "start",
+    "nodes": [
+        {"id": "start", "type": "start", "config": {}},
+        {"id": "sub", "type": "subworkflow", "config": {"workflow_id": "child_1"}},
+        {"id": "end", "type": "end", "config": {}},
+    ],
+    "edges": [{"source": "start", "target": "sub"}, {"source": "sub", "target": "end"}],
+}
+
+
+async def test_subworkflow_runs_child():
+    ctx = make_runtime_ctx("t_sub", "p_sub")
+    ctx.checkpointer = InMemorySaver()
+    ctx.workflows = {"child_1": _CHILD}
+    graph = compile_workflow(_PARENT, ctx)
+    out = await graph.ainvoke({"messages": [HumanMessage(content="hi")]}, {"configurable": {"thread_id": "s1"}})
+    assert out["messages"][-1].content == "Child answered."
+
+
+async def test_missing_subworkflow_is_passthrough():
+    ctx = make_runtime_ctx("t_sub2", "p_sub2")
+    ctx.checkpointer = InMemorySaver()
+    ctx.workflows = {}  # referenced child not present
+    graph = compile_workflow(_PARENT, ctx)
+    out = await graph.ainvoke({"messages": [HumanMessage(content="hi")]}, {"configurable": {"thread_id": "s2"}})
+    # no child -> passthrough; the original message survives, no crash
+    assert out["messages"][-1].content == "hi"