---
paths:
  - "nodes/generalFunctions/**"
---

# General Functions Rules

## Critical: Platform-Wide Impact
generalFunctions is shared by ALL 13 nodes. Any change here can break any node.

## Before Modifying
1. Identify which module(s) you're changing
2. Search for imports across all `nodes/*/src/` directories
3. List all consuming nodes
4. Verify backward compatibility

## Export Stability
- Never remove or rename exports without checking all consumers
- Prefer additive changes (new exports) over breaking changes
- If a breaking change is necessary, it requires a decision-gate interview

## Canonical Units
MeasurementContainer and internal processing use canonical units:
- Pressure: Pa
- Flow: m³/s
- Power: W
- Temperature: K

Unit conversions happen at system boundaries (input/output), not in core logic.

## Testing After Changes
Run tests in ALL affected consumer nodes, not just generalFunctions itself.