langchain.agents.create_agent so that every agent
created after instrument() is called receives a
FiddlerAgentMiddleware automatically. Callers no longer need to
pass middleware=[FiddlerAgentMiddleware(...)] to each create_agent
call.
When a call to create_agent includes a name argument (e.g.
name='flight_assistant'), that name is used for the agent in traces.
Otherwise, no agent name is set (empty string), so the agent is not labeled
in the UI. If a call to create_agent already includes a
FiddlerAgentMiddleware instance in its middleware list, the
instrumentor skips injection for that call so existing manual
configurations are preserved.
Note: Instrumentation persists for the lifetime of the application unless
explicitly removed by calling uninstrument(). Calling instrument() multiple
times is safe — it will not create duplicate middleware.
Usage:
instrument() patches the langchain.agents module attribute.
If you prefer from langchain.agents import create_agent, call
instrument() before that import so the local name is bound to the
patched wrapper.
Parameters
FiddlerClient
required
The FiddlerClient instance. Required.
Raises
RuntimeError – If the FiddlerClient tracer cannot be initialized.instrument()
Enable automatic instrumentation of LangChain V1 agents. Activates the instrumentor by patchinglangchain.agents.create_agent
to automatically inject FiddlerAgentMiddleware into all agent
instances created afterwards.
This method is idempotent — calling it multiple times has the same effect
as calling it once. After activation, all newly created agents will
automatically include Fiddler’s middleware.
Parameters
Any
Additional instrumentation configuration (currently unused).
Example
uninstrument()
Disable automatic instrumentation and restore original behavior. Deactivates the instrumentor by restoring the originallangchain.agents.create_agent function. Agents created after calling
this method will no longer have FiddlerAgentMiddleware
automatically injected.
Note: This does not affect agents that were already created while
instrumentation was active — those will retain their middleware.
Parameters
Any
Additional uninstrumentation configuration (currently unused).
Example
instrumentation_dependencies()
Returns the package dependencies required for this instrumentor.Returns
A collection of package dependency strings.