Imported from seifertd/chord-practice (AGENTS.md). Install upstream with npx skills add seifertd/chord-practice. Copyright stays with the author.

Agent Instructions

Testing

• All new features and bug fixes must be accompanied by tests.
• Run bin/rails test before committing — all tests must pass.
• Controller tests go in test/controllers/, model tests in test/models/.
• To authenticate a player in controller tests, set cookies[:player_id] = player.uuid in setup — this uses the anonymous auth fallback in Authentication#resume_session without requiring a real login session.
• Fixtures use a pre-hashed password ($2a$12$dUE8mqkdZdQLjm7etdI7UuctpetWmq9zAluJLPC3ShchYiGf3Zpmm) which corresponds to the plaintext password.

Migrations

• Always commit db/schema.rb alongside any migration file.
• Backfill data in the migration where possible, using raw SQL via update_all rather than Ruby-level attribute assignment to avoid column cache issues.

General

• Run tests before pushing. Do not push a branch with failing tests.