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WORK_LOG.md

@@ -137,7 +137,7 @@ mxpic_router/mxpic_router/builder.py
 mxpic_router/tests/test_eda_router_contract.py
 
 
-## 2026-06-10
+## 2026-06-09
 
 ### Scope
 
@@ -173,3 +173,37 @@ The current resistor test YAML was found to export `xsection: strip` and `family
 
 mxpic_router/mxpic_router/builder.py
 mxpic_router/tests/test_eda_router_contract.py
+
+
+## 2026-06-10
+
+### Scope
+
+Backend routing condition alignment and automatic route direction normalization in `mxpic_router`.
+
+### Summary
+
+Recent work focused on aligning backend routing behavior with updated frontend metadata and reducing direction-related crossing issues in bundled automatic routes.
+
+### Completed Work
+
+#### 1. PCB Routing Condition Update
+
+The PCB routing condition was updated to use the YAML link `family` field instead of route `xsection`.
+
+Routes with `family: electrical` now enable `PCB=True`, regardless of the specific metal layer or xsection name. Optical routes remain unchanged.
+
+#### 2. Automatic Route Direction Normalization
+
+Automatic bundled routes are now normalized to route from the lower-x endpoint to the higher-x endpoint.
+
+This keeps route direction consistent inside the same bundle and reduces crossing risks caused by mixed left-to-right and right-to-left link definitions.
+
+#### 3. Test Coverage Update
+
+Contract tests were added to verify electrical-family PCB routing and left-to-right automatic route ordering.
+
+### Modified Files
+
+mxpic_router/mxpic_router/builder.py
+mxpic_router/tests/test_eda_router_contract.py