AtCoderNoviSteps

Add a new ContestType and ContestTableProvider across 5 layers using TDD. Covers all 3 patterns. Asks targeted questions to gather pattern-specific requirements before touching code.

Analyze a major version dependency upgrade: summarize breaking changes, assess project impact, and propose new features to adopt. Outputs a plan.md and executes the upgrade.

Analyze a GitHub issue or file path and produce a phased refactoring plan. Outputs a TODO list only — does not make code changes.

Standard closing routine for an implementation session. Verifies tests, updates the plan checklist, proposes rule/skill additions, checks for bloat, and detects repeated instructions.