fix(eval): serialize non-json-native tool args when simulating

[radu-mocanu]

Summary

• a simulated tool call no longer fails when a tool argument is not json-native (uuid.UUID, datetime, Enum, set)
• applies to both simulation paths: the LLMMocker prompt and the simulate-component payload

Why

tool args_schema models can type a field as any python type, and langchain hands the tool the validated value, so the mocker receives real objects rather than the strings the model emitted. both paths encoded that with a bare json.dumps, which raised TypeError: Object of type UUID is not JSON serializable and surfaced verbatim as the tool's output. the IXP extraction tool types its attachment id as uuid.UUID, so every simulated call to it failed before the simulating LLM was even reached.

serialization now goes through the existing helpers in uipath.core.serialization, so payloads that already encoded cleanly are unchanged.

[Copilot]

Pull request overview

Fixes simulation-time failures when tool-call arguments include non-JSON-native Python objects by routing serialization through shared helpers in uipath.core.serialization, and adds regression tests to cover the simulation paths.

Changes:

• Use serialize_defaults as the json.dumps(..., default=...) handler when building the LLMMocker prompt.
• Normalize the simulate-component request payload before passing it to httpx’s json= encoding.
• Add tests covering UUID and other non-JSON-native tool args, and bump package version to 2.13.17.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/uipath/src/uipath/eval/mocks/_llm_mocker.py	Uses serialize_defaults to ensure prompt JSON encoding doesn’t fail on validated Python objects (UUID/datetime/Enum/etc.).
packages/uipath/src/uipath/eval/mocks/_simulate_component_service.py	Normalizes simulate-component payload prior to httpx JSON encoding (but see review comments re: serialize_object coverage).
packages/uipath/tests/cli/eval/mocks/test_mocker_arg_serialization.py	Adds regression tests for tool-arg serialization across both simulation paths.
packages/uipath/pyproject.toml	Bumps package version to 2.13.17.
packages/uipath/uv.lock	Updates lockfile entry for the uipath package version bump.

Comments suppressed due to low confidence (1)

packages/uipath/src/uipath/eval/mocks/_simulate_component_service.py:32

• Even after calling serialize_object(payload), set/Enum values can remain non-serializable. Passing a JSON-native object to httpx is safest by converting with serialize_json() and parsing back to a dict/list tree.

            json=serialize_object(payload),

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud