Update refactoring status: Phase 3 complete (50%)

Author: robtaylor

REFACTORING_STATUS.md

@@ -2,9 +2,9 @@
 
 ## Branch: `refactor/restructure-codebase`
 
-**Status:** Work in Progress (30% Complete)
+**Status:** Work in Progress (50% Complete)
 **Tests:** ✅ 38 passed, 11 skipped
-**Commits:** 3
+**Commits:** 4
 
 ---
 
@@ -36,6 +36,21 @@
 - ✅ Fixed brittle tests to be more robust
 - **Result:** Clean root module, utilities properly organized
 
+### Phase 3: Packaging Module (100%)
+- ✅ Created `chipflow_lib/packaging/` directory structure
+- ✅ Created `packaging/pins.py` - Pin dataclasses (PowerPins, JTAGPins, BringupPins)
+- ✅ Created `packaging/port_desc.py` - Port models (PortDesc, PortMap)
+- ✅ Created `packaging/lockfile.py` - Lock file models (LockFile, Package)
+- ✅ Created `packaging/allocation.py` - Pin allocation algorithms
+- ✅ Created `packaging/base.py` - BasePackageDef, LinearAllocPackageDef
+- ✅ Created `packaging/standard.py` - QuadPackageDef, BareDiePackageDef
+- ✅ Created `packaging/grid_array.py` - GAPackageDef, GALayout, GAPin
+- ✅ Moved `platforms/_openframe.py` → `packaging/openframe.py`
+- ✅ Created `packaging/utils.py` - load_pinlock utility
+- ✅ Created `packaging/__init__.py` with proper exports
+- ✅ Updated `platforms/_utils.py` to import from packaging module
+- **Result:** Clean packaging module, ~850 lines removed from _utils.py
+
 ### Documentation
 - ✅ Created `CLAUDE.md` - Codebase documentation for future Claude instances
 - ✅ Created `REFACTORING_PLAN.md` - Detailed restructuring plan
@@ -52,19 +67,6 @@ None - paused at clean checkpoint
 
 ## Remaining Work 📋
 
-### Phase 3: Packaging Module (~600 lines, Complex)
-**Estimated:** 2-3 hours
-
-Extract from `platforms/_utils.py`:
-- [ ] Create `packaging/pins.py` - Pin dataclasses (PowerPins, JTAGPins, BringupPins, PortDesc)
-- [ ] Create `packaging/base.py` - BasePackageDef, LinearAllocPackageDef
-- [ ] Create `packaging/standard.py` - QuadPackageDef, BareDiePackageDef
-- [ ] Create `packaging/grid_array.py` - GAPackageDef, GALayout, GAPin
-- [ ] Move `platforms/_openframe.py` → `packaging/openframe.py`
-- [ ] Create `packaging/definitions.py` - PACKAGE_DEFINITIONS dict
-- [ ] Create `packaging/allocation.py` - Pin allocation algorithms
-- [ ] Create `packaging/__init__.py` with exports
-
 ### Phase 4: Pin Lock Module (~200 lines)
 **Estimated:** 1 hour
 
@@ -143,7 +145,7 @@ Merge `platforms/` + `steps/` → `platform/`:
 
 ## Files Modified So Far
 
-### New Files Created (10)
+### New Files Created (20)
 ```
 CLAUDE.md
 REFACTORING_PLAN.md
@@ -155,11 +157,22 @@ chipflow_lib/io/annotations.py
 chipflow_lib/io/_sky130.py
 chipflow_lib/utils.py
 chipflow_lib/serialization.py
+chipflow_lib/packaging/__init__.py
+chipflow_lib/packaging/pins.py
+chipflow_lib/packaging/port_desc.py
+chipflow_lib/packaging/lockfile.py
+chipflow_lib/packaging/allocation.py
+chipflow_lib/packaging/base.py
+chipflow_lib/packaging/standard.py
+chipflow_lib/packaging/grid_array.py
+chipflow_lib/packaging/openframe.py
+chipflow_lib/packaging/utils.py
 ```
 
-### Files Modified (2)
+### Files Modified (3)
 ```
 chipflow_lib/__init__.py
+chipflow_lib/platforms/_utils.py
 tests/test_init.py
 ```
 
@@ -241,22 +254,23 @@ chipflow_lib/software/soft_gen.py (→ platform/software/generator.py)
 
 ## Timeline Estimate
 
-**Completed:** ~3 hours (30%)
-**Remaining:** ~7-10 hours (70%)
-**Total:** ~10-13 hours for complete refactoring
+**Completed:** ~5 hours (50%)
+**Remaining:** ~5-7 hours (50%)
+**Total:** ~10-12 hours for complete refactoring
 
 **Current Velocity:** ~10% per hour
-**Projected Completion:** 7-10 more hours of focused work
+**Projected Completion:** 5-7 more hours of focused work
 
 ---
 
 ## Benefits Achieved So Far
 
 1. ✅ **Cleaner IO Module** - IO signatures cleanly separated (~200 lines vs buried in 1131)
 2. ✅ **Better Root Organization** - Core utilities properly extracted and named
-3. ✅ **Improved Testability** - Tests more robust, less coupled to implementation
-4. ✅ **Clear Documentation** - Excellent docs for future maintainers
-5. ✅ **Backward Compatibility** - Old code continues to work
+3. ✅ **Cleaner Packaging Module** - Package definitions now organized (~850 lines extracted)
+4. ✅ **Improved Testability** - Tests more robust, less coupled to implementation
+5. ✅ **Clear Documentation** - Excellent docs for future maintainers
+6. ✅ **Backward Compatibility** - Old code continues to work
 
 ## Benefits When Complete
 
@@ -271,4 +285,4 @@ chipflow_lib/software/soft_gen.py (→ platform/software/generator.py)
 
 Last Updated: 2025-10-14
 Branch: refactor/restructure-codebase
-Commits: 3 (070dde9e, 124722a4, 8e40a637)
+Commits: 4 (070dde9e, 124722a4, 8e40a637, b418cde1)