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Trey t 1d7a7d9cbe docs(09-03): complete scenario C corridor efficiency TDD plan

Phase 9 complete: All three trip planner modes validated with TDD.

Summary of 09-03 accomplishments:
- Feature 1: Corridor game inclusion (5 tests, 1 fix)
  - Enhanced findDirectionalStadiums() to exclude beyond-endpoint games
- Feature 2: Anti-backtracking validation (7 tests, all passed)
  - Confirmed existing implementation validates monotonic progress

12 tests added, 3 commits (2 test, 1 feat).

State updates:
- Progress: 30% → 40%
- Phase 9: Complete (3/3 plans)
- Next: Phase 10 (Trip Builder Options TDD)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-01-10 15:43:23 -06:00

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Project State

Project Reference

See: .planning/PROJECT.md (updated 2026-01-10)

Core value: Every game must correctly link to its teams and stadium — a game at the wrong venue or with broken team links ruins trip planning. Current focus: v1.1 TDD & Correctness — Phase 9

Current Position

Phase: 9 of 12 (Trip Planner Modes TDD) Plan: 3 of 3 in current phase Status: Phase complete Last activity: 2026-01-10 — Completed 09-03: Scenario C corridor efficiency TDD

Progress: ████░░░░░░ 40%

Shipped Milestones

Milestone	Phases	Plans	Shipped
v1.0 Data Pipeline	1-7 (+2.1)	15	2026-01-10

Accumulated Context

Decisions

Phase	Decision	Rationale
08-02	Dynamic beam width scaling (800+→50, 2K+→30, 5K+→25)	Prevents exponential blowup with large datasets while preserving diversity; achieves 10-17x speedup
08-02	Early termination (<5K at 2x, ≥5K at 3x beam width)	Stops expansion when sufficient diverse routes found; ensures consistent performance
09-01	Dynamic time buffers (same-day: 2hr/0.5hr, multi-day: 3hr/1hr)	Enables realistic doubleheaders while preserving multi-day behavior; people leave during/after first game for same-day transitions

See also: PROJECT.md Key Decisions table for architectural decisions.

Deferred Issues

CBB support (350+ D1 teams requires separate scoped phase)
Test suite flakiness: 5 tests fail in full suite but pass individually (Swift Testing parallel execution + simulator state pollution, pre-existing issue)

Blockers/Concerns

None.

Roadmap Evolution

Milestone v1.1 TDD & Correctness created: Test-driven validation of trip planning engine, 5 phases (Phase 8-12)
Phase 9.1 inserted after Phase 9: Fix flaky test when ran in parallel (URGENT) - 5 tests fail in parallel but pass individually due to Swift Testing state pollution

Session Continuity

Last session: 2026-01-10 Stopped at: Phase 9 complete (trip planner modes TDD) Resume file: None Next action: /gsd:execute-plan .planning/phases/10-trip-builder-options-tdd/10-01-PLAN.md

2.1 KiB Raw Blame History