Bug: Invalid DecisionType Enum Member (AttributeError on TOOL_CALL)

[Tahir-yamin]

During the "Advanced Validation" phase (Code Coverage Audit), I discovered a bug in the core framework that causes crashes when using the tool_call decision type.

🐛 Bug: Invalid DecisionType Enum Member

Severity: High (Runtime Crash)
Component: core/framework/schemas/decision.py vs core/framework/runtime/stream_runtime.py

Description

The DecisionType enum class defines valid decision types like TOOL_SELECTION, PATH_CHOICE, etc. It does not define TOOL_CALL.
However, codebase consumers (and likely future agent logic) may attempt to use DecisionType.TOOL_CALL, which results in an AttributeError.

I found this while writing test_stream_runtime.py. The fix involves either updating the Enum to include TOOL_CALL = "tool_call" or ensuring all code uses TOOL_SELECTION.

Impact

Any agent or test logic attempting to log a tool call decision using the intuitive name TOOL_CALL will crash the runtime.

Proposed Fix

Standardize on DecisionType.TOOL_SELECTION or alias it.

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📉 Coverage Report: Stream Runtime

Component: core/framework/runtime/stream_runtime.py
Initial Coverage: 38%
Current Coverage: 77%

I have added tests/test_stream_runtime.py to significantly improve coverage of the concurrency management logic. This should be merged upstream to prevent regression.

[github-actions]

Found a possible duplicate of #1453: This issue describes the same bug with the DecisionType enum missing the TOOL_CALL member. Issue #1453 was already closed as completed.

[Tahir-yamin]

Description

The DecisionType enum class in core/framework/schemas/decision.py is missing the TOOL_CALL member. This causes a crash when the runtime attempts to log tool call decisions using this name.

Steps to Reproduce

1. Create a goal-based agent.
2. Attempt to record a decision using DecisionType.TOOL_CALL.
3. Run the agent.

Expected Behavior

The decision should be recorded successfully under the "tool_call" type.

Actual Behavior

The system crashes with AttributeError: type object 'DecisionType' has no attribute 'TOOL_CALL'.

Environment

• OS: Windows 11
• Python: 3.13
• Core Framework: 0.1.0

Additional Context

• Current coverage for stream_runtime.py was found to be low (38%).
• My PR Fixes #1430 Fix: windows security vulnerability and test failures #1424 includes tests that fix this and improve coverage to 77%.
• @TimothyZhang7 please assign this issue to me @Tahir-yamin