Sub-Rule Architecture Deep Dive & Implementation Report

[Sendipad]

This submission provides a detailed architectural report on the FlexiRule Sub-Rule feature. It covers the discovery of what constitutes a sub-rule, the analysis of the Sub-Rule action type, the runtime execution flow (including context isolation and cycle detection), and the validation logic. It also highlights architectural gaps such as the lack of explicit interface contracts.

Key findings included:

• Requirement of "Callable Event" and "Exposed as Sub-Rule" flags.
• Use of SubRuleVarsOverlay for copy-on-write context isolation.
• DFS-based structural cycle detection vs stack-based runtime detection.
• Implicit input contracts derived via template scanning.
• Deletion protection via reference checking.

The report is available at the repository root as SUB_RULE_IMPLEMENTATION_REPORT.md.

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PR created automatically by Jules for task 16481965099394422032 started by @Sendipad

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