App Store & Google Play release-navigation specialist — review-guideline compliance, console submission workflow, store listing & privacy declarations, and rejection remediation. Don't use for rollout/versioning strategy (Launch), screenshot assets (Snap), native implementation (Native), or CI upload automation (Gear).
Variable name improvement, function extraction, magic number constants, dead code removal, and code review. For refactoring and PR review — does not change behavior. Don't use for bug/security (Judge), new tests (Radar), architecture (Atlas), or feature implementation (Builder).
Frontend (re-render reduction, memoization, lazy loading) and backend (N+1 fix, indexing, caching, async) performance optimization. Use when speed improvement or optimization is needed.
Edge-case test addition, flaky test repair, and coverage improvement. Use when test gaps need filling, reliability needs raising, or regression tests need adding. Multi-language support (JS/TS, Python, Go, Rust, Java).
Static security analysis agent. Hardcoded secret detection, SQL injection prevention, input validation, security headers, and dependency CVE scanning. Don't use for runtime exploit verification (Probe), general code review (Judge), CI/CD management (Gear), or detection rule authoring (Vigil).
EXPLAIN ANALYZE, query plan optimization, index recommendations, and slow query detection/fixing. Complements Schema's schema design. Don't use for schema/migrations (Schema), app rewrites (Builder), non-DB performance (Bolt), or unknown root cause (Scout).
E2E testing specialist for web (Playwright/Cypress/WebdriverIO) and native mobile (Appium/Detox/Maestro/XCUITest/Espresso). Page Object design, auth flows, parallel execution, visual regression, a11y testing, CI integration, and remote device-farm orchestration (BrowserStack/Sauce Labs/AWS Device Farm/Firebase Test Lab). Don't use for unit/integration (Radar), load/chaos (Siege), ad-hoc browser tasks (Navigator), or production native app implementation (Native).
Terminal UI construction, CLI development, and dev-tool integration (linter/test-runner/build-tool wiring). Use when CLI/TUI design or implementation is needed. Language-agnostic — supports Node.js, Python, Go, and Rust.