New Features

Model Support: Sim v0.5.106 adds definitions for GPT-5.4 and GPT-5.4-pro models, enabling users to leverage the latest OpenAI language models within their workflows and agents.

Bug Fixes & Improvements

Sentinel Condition Execution: Resolved critical bugs affecting condition execution with subflow sentinels, including snapshot highlighting issues and duplicate terminal logs that were cluttering debug output.

Snapshot Detection: Improved client-side activation detection by excluding sentinel values from snapshot processing, reducing false positives and improving workflow reliability.

Legacy Migration: Fixed subblock ID migration for knowledge base systems (KBS) with additional CI checks to prevent regression.

Action Items

Users should update to v0.5.106 to access the new GPT-5.4 models and benefit from the stability improvements, particularly if they use sentinel-based condition logic or knowledge base features in their workflows.