Apps¶

Apps derive from AppDefinition and App.

🦑 Core Apps¶

TruChain in package trulens-apps-langchain.
```
pip install trulens-apps-langchain
```
TruLlama in package trulens-apps-llamaindex.
```
pip install trulens-apps-llamaindex
```
TruGraph in package trulens-apps-langgraph. Subclasses TruChain, so LangGraph apps get LangChain instrumentation as well as graph node and edge spans.
```
pip install trulens-apps-langgraph
```
TruRails in package trulens-apps-nemo.
Not installable alongside LangGraph

nemoguardrails requires langchain<0.4, while trulens-apps-langgraph requires langchain>=1.0. The two cannot coexist in one environment, so trulens-apps-nemo is not part of the default install. To use it, pin LangChain and skip the LangGraph package:
```
pip install "langchain<1.0" trulens-apps-nemo
```

Not a recorder — this wraps a feedback function instead of an app.

TruGEPA in package trulens-apps-gepa. Adapts a TruLens feedback function into a GEPA fitness function, and logs each candidate prompt as a TruVirtual record so the whole optimization run is traceable.
```
pip install trulens-apps-gepa
```