trace.json for a `defs: data: ...` has strange syntax

[starpit]

Describe the bug
Iin the trace.json of examples/react/demo.pdl, the top-level defs (of the tools) has a bizarre result field. it kinda looks like JSON, but is a string wrapped around invalid JSON (single quotes)

"[{'type': 'function', 'function': {'name': 'Calc', 'description':
      'Calculator function', 'parameters': {'type': 'object', 'properties':
      {'expr': {'type': 'string', 'description': 'Arithmetic expression to
      calculate'}}, 'required': ['expr']}}}, {'type': 'function', 'function':
      {'name': 'Search', 'description': 'Wikipedia search', 'parameters':
      {'type': 'object', 'properties': {'topic': {'type': 'string',
      'description': 'Topic to search'}}, 'required': ['topic']}}}]"

To Reproduce

pdl --trace trace.json examples/react/demo.pdl

Expected behavior
Probably the result field should be proper JSON?

Screenshots
n/a

Desktop (please complete the following information):

• OS: macOS
• Browser n/a
• Version PDL 0.2.1.dev88+g334a253.d20250131

Additional context
n/a

[esnible]

@starpit , I wasn't able to run that command line, I needed to explicitly name the trace file (e.g. pdl --trace "/tmp/react-demo.trace.json" examples/react/demo.pdl).

When I loaded the trace into the viewer, the duration for the action was -55y 54d 15h 19m 51.1s.

On the command line, I saw the output

Obs: examples/react/demo.pdl:28 - Code error: ModuleNotFoundError("No module named 'wikipedia'")

which was not present in the trace. I would like to any CLI stdout errors in the trace viewer.

[starpit]

These seem like separate issues?

[vazirim]

@esnible you can run pip install 'prompt-declaration-language[examples]' to install all the dependencies needed in the examples.

[esnible]

Thanks. Now I am getting

examples/react/demo.pdl:28 - Error during 'replicate/ibm-granite/granite-3.1-8b-instruct' model call: litellm.UnprocessableEntityError: ReplicateException - Unable to parse response. Got=None

This seems to be due to Replicate; I will wait for #522 to merge and try again later.