docs(03-02): complete secondary sports canonicalization plan

Tasks completed: 3/3
- Add MLS to canonicalization pipeline (30 teams + 10 aliases + 8 stadium aliases)
- Add WNBA to canonicalization pipeline (13 teams + 6 aliases + 4 stadium aliases)
- Add NWSL to canonicalization pipeline (13 teams + 7 aliases + 3 stadium aliases)

Phase 3 complete - all 7 sports now have alias support (180 teams total)

SUMMARY: .planning/phases/03-alias-systems/03-02-SUMMARY.md

.planning/ROADMAP.md

@@ -64,7 +64,7 @@ Plans:
 
 Plans:
 - [x] 03-01: Add NFL to canonicalization pipeline with aliases
-- [ ] 03-02: Add MLS, WNBA, NWSL to canonicalization pipeline with aliases
+- [x] 03-02: Add MLS, WNBA, NWSL to canonicalization pipeline with aliases
 
 ### Phase 4: Canonical Linking
 **Goal**: Ensure every game correctly links to its home/away teams and stadium via canonical IDs
@@ -104,7 +104,7 @@ Phases execute in numeric order: 1 → 2 → 2.1 → 3 → 4 → 5 → 6
 | 1. Script Architecture | 3/3 | Complete | 2026-01-10 |
 | 2. Stadium Foundation | 2/2 | Complete | 2026-01-10 |
 | 2.1. Additional Sports Stadiums | 3/3 | Complete | 2026-01-10 |
-| 3. Alias Systems | 1/2 | In progress | - |
+| 3. Alias Systems | 2/2 | Complete | 2026-01-10 |
 | 4. Canonical Linking | 0/TBD | Not started | - |
 | 5. CloudKit CRUD | 0/TBD | Not started | - |
 | 6. Validation Reports | 0/TBD | Not started | - |

.planning/STATE.md

@@ -10,11 +10,11 @@ See: .planning/PROJECT.md (updated 2026-01-09)
 ## Current Position
 
 Phase: 3 of 7 (Alias Systems)
-Plan: 1 of 2 in current phase
-Status: In progress
-Last activity: 2026-01-10 — Completed 03-01-PLAN.md (NFL canonicalization)
+Plan: 2 of 2 in current phase
+Status: Phase complete
+Last activity: 2026-01-10 — Completed 03-02-PLAN.md (MLS/WNBA/NWSL canonicalization)
 
-Progress: █████░░░░░ 47% (9 of 19 plans complete)
+Progress: █████░░░░░ 53% (10 of 19 plans complete)
 
 ## Performance Metrics
 
@@ -32,7 +32,7 @@ Progress: █████░░░░░ 47% (9 of 19 plans complete)
 | 2.1. Additional Sports Stadiums | 3/3 | 17 min | 5.7 min |
 
 **Recent Trend:**
-- Last 5 plans: 02.1-01 (6 min), 02.1-02 (5 min), 02.1-03 (6 min), 03-01 (4 min)
+- Last 5 plans: 02.1-02 (5 min), 02.1-03 (6 min), 03-01 (4 min), 03-02 (5 min)
 - Trend: Consistent
 
 ## Accumulated Context
@@ -72,6 +72,6 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-01-10
-Stopped at: Completed 03-01-PLAN.md (NFL canonicalization)
+Stopped at: Completed Phase 3 (Alias Systems)
 Resume file: None
-Next action: Execute 03-02-PLAN.md (MLS, WNBA, NWSL canonicalization)
+Next action: Plan Phase 4 (Canonical Linking)

.planning/phases/03-alias-systems/03-02-SUMMARY.md

@@ -0,0 +1,102 @@
+---
+phase: 03-alias-systems
+plan: 02
+subsystem: data-pipeline
+tags: [mls, wnba, nwsl, canonicalization, aliases, teams, stadiums]
+
+# Dependency graph
+requires:
+  - phase: 02.1-additional-sports-stadiums
+    provides: MLS_TEAMS, WNBA_TEAMS, NWSL_TEAMS dicts with stadium data
+  - phase: 03-alias-systems/03-01
+    provides: NFL canonicalization patterns, division mapping approach
+provides:
+  - MLS teams canonicalized (30 teams in Eastern/Western conferences)
+  - WNBA teams canonicalized (13 teams)
+  - NWSL teams canonicalized (13 teams)
+  - Team abbreviation aliases for all secondary sports
+  - Stadium historical aliases for all secondary sports
+affects: [04-canonical-linking, game-resolution, stadium-matching]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [conference-only-divisions, shared-venue-aliases]
+
+key-files:
+  created: []
+  modified:
+    - Scripts/canonicalize_teams.py
+    - Scripts/canonicalize_games.py
+    - Scripts/canonicalize_stadiums.py
+
+key-decisions:
+  - "MLS/WNBA/NWSL use conference-only structure (no divisions) - mapped to (conference, None)"
+  - "WNBA/NWSL share venues with NBA/MLS - minimal new stadium aliases needed"
+  - "Added arena_key='arena' for WNBA to match venue field naming"
+
+patterns-established:
+  - "All 7 sports now follow consistent canonicalization patterns"
+  - "Conference-only sports use (conference_id, None) for division mapping"
+
+issues-created: []
+
+# Metrics
+duration: 5 min
+completed: 2026-01-10
+---
+
+# Phase 3 Plan 02: Secondary Sports Canonicalization Summary
+
+**MLS, WNBA, NWSL added to canonicalization pipeline with 56 total new teams, 23 abbreviation aliases, and 15 stadium aliases**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-01-10T15:38:30Z
+- **Completed:** 2026-01-10T15:43:56Z
+- **Tasks:** 3
+- **Files modified:** 3
+
+## Accomplishments
+- MLS canonicalized with 30 teams (Eastern/Western conferences) + 10 aliases + 8 stadium aliases
+- WNBA canonicalized with 13 teams + 6 aliases + 4 stadium aliases
+- NWSL canonicalized with 13 teams + 7 aliases + 3 stadium aliases
+- Total team count now 180 across all 7 sports (NBA: 30, MLB: 30, NHL: 32, NFL: 32, MLS: 30, WNBA: 13, NWSL: 13)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add MLS to canonicalization pipeline** - `b6a913d` (feat)
+2. **Task 2: Add WNBA to canonicalization pipeline** - `285bc07` (feat)
+3. **Task 3: Add NWSL to canonicalization pipeline** - `81f620d` (feat)
+
+**Plan metadata:** (pending)
+
+## Files Created/Modified
+- `Scripts/canonicalize_teams.py` - Added imports, division dicts, sport_mappings for MLS, WNBA, NWSL
+- `Scripts/canonicalize_games.py` - Added 23 team abbreviation aliases across 3 sports
+- `Scripts/canonicalize_stadiums.py` - Added 15 stadium historical aliases across 3 sports
+
+## Decisions Made
+- MLS/WNBA/NWSL use conference-only structure (no divisions) - mapped to (conference_id, None)
+- WNBA/NWSL share venues with NBA/MLS - only added sport-specific aliases where needed
+- Added arena_key='arena' for WNBA to match venue field naming convention
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## Next Phase Readiness
+- Phase 3 complete - all 7 sports now have alias support
+- 180 teams canonicalized with full conference/division structure
+- Ready for Phase 4: Canonical Linking
+
+---
+*Phase: 03-alias-systems*
+*Completed: 2026-01-10*