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Apply when writing tests, modifying test files, fixing test failures, debugging CI failures, adding test coverage, creating adversarial tests, or reviewing any file under tests/. Also apply when implementing features or fixes that require corresponding test changes. Enforces pytest framework rules, mock isolation, cross-platform compatibility (Linux, macOS, Windows), and CI pipeline awareness. Load this skill before touching any test file. For CI failure debugging specifically, also load the ci-failure-resolver skill.

Enable a high-quality swarm-like Claude Code workflow for the current session, and optionally execute a task immediately using that mode. Uses parallel subagents for breadth, independent reviewer validation for precision, and critic challenge for final confidence. Use when the user wants swarm-like behavior, higher review rigor, or maximum quality without sacrificing Claude Code speed.

Guidelines for writing, organizing, and maintaining tests in the opencode-swarm repository. Covers framework rules (bun:test), mock isolation, CI pipeline structure, file placement, and anti-patterns that break cross-platform CI. Load this skill before writing or modifying any test file.