feat: Add pipecat integration#543
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Adds observer-based Pipecat instrumentation that injects a
BraintrustPipecatObserver into PipelineWorker construction via setup_pipecat()
and auto_instrument(). The observer turns real Pipecat pipeline/provider events
into Braintrust task and llm spans, with VCR-backed OpenAI/Pipecat coverage for
both latest and 1.3.0.
Try it in an app:
```python
import braintrust
from pipecat.frames.frames import EndFrame, LLMContextFrame
from pipecat.pipeline.pipeline import Pipeline
from pipecat.pipeline.worker import PipelineParams, PipelineWorker
from pipecat.processors.aggregators.llm_context import LLMContext
from pipecat.services.openai.llm import OpenAILLMService
from pipecat.workers.runner import WorkerRunner
braintrust.init_logger(project="pipecat-demo")
braintrust.auto_instrument() # installs the Pipecat PipelineWorker observer
llm = OpenAILLMService(
api_key="...",
settings=OpenAILLMService.Settings(
model="gpt-4o-mini",
temperature=0.0,
max_completion_tokens=64,
),
)
worker = PipelineWorker(
Pipeline([llm]),
params=PipelineParams(enable_metrics=True, enable_usage_metrics=True),
)
context = LLMContext(messages=[{"role": "user", "content": "Say hello"}])
@worker.event_handler("on_pipeline_started")
async def on_pipeline_started(_worker, _frame):
await worker.queue_frames([LLMContextFrame(context), EndFrame()])
runner = WorkerRunner(handle_sigint=False)
await runner.add_workers(worker)
await runner.run()
```
To validate locally from this repo:
```bash
cd py
nox -s "test_pipecat(latest)"
nox -s "test_pipecat(1.3.0)"
OPENAI_API_KEY=sk-test-dummy-api-key-for-vcr-tests \
nox -s "test_pipecat(latest)" -- -k test_setup_pipecat_traces_real_pipeline_frames
```
Expected trace shape:
```text
pipecat_pipeline task
└── pipecat_llm_response llm
├── input: [{role: developer}, {role: user, ...}]
├── output: [{index: 0, finish_reason: stop, message: {...}}]
├── metadata: {provider: openai, model: gpt-4o-mini}
└── metrics: {prompt_tokens, completion_tokens, tokens, time_to_first_token}
```
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resolves https://linear.app/braintrustdata/issue/SDK-7/braintrust-pipecat-integration
WIP