Checks compiler/linter errors, deprecation warnings, type errors, failed tests, build config issues. Returns findings with severity, location, effort, recommendations.

Creates test documentation (testing-strategy.md + tests/README.md). Establishes testing philosophy and Story-Level Test Task Pattern.

Creates test infrastructure with Vitest, xUnit, and pytest

Creates Stories from IDEAL plan (CREATE) or appends user-requested Stories (ADD). Generates 9-section documents, validates INVEST, creates in Linear.

Researches real-world problems, competitor solutions, and customer complaints before test planning. Posts findings as Linear comment for ln-522 and ln-523.

Creates infrastructure.md (always) and runbook.md (if hasDocker). DevOps documentation worker.

Generates Docker and docker-compose configuration for multi-container development

Orchestrates final verification - build, test, and container health checks

Executes Story Finalizer test tasks (label "tests") from Todo -> To Review. Enforces risk-based limits and priority.

Checks cyclomatic complexity, nesting, long methods, god classes, method signatures, O(n²), N+1 queries, constants management. Returns findings.

Checks outdated packages, unused deps, reinvented wheels, vulnerability scan (CVE/CVSS). Supports mode: full | vulnerabilities_only.

Checks structured logging, health check endpoints, metrics collection, request tracing, log levels. Returns findings with severity, location, effort, recommendations.

Checks DRY (10 types), KISS/YAGNI, error handling, DI patterns. Returns findings with severity, location, effort, pattern_signature.

Generates .NET Clean Architecture backend structure from entity definitions

CREATE/REPLAN Stories for Epic (5-10 Stories). Multi-epic routing: auto-groups Stories by correct Epic. Delegates ln-001 for standards research. Self-Check phase.

Reviews task implementation for quality, code standards, test coverage. Creates [BUG] tasks for side-effect issues. Sets task Done or To Rework. Runs inline from coordinator.

Checks redundant fetches, N-UPDATE/DELETE loops, unnecessary resolves, over-fetching, missing bulk operations, wrong caching scope. Returns findings with severity.

Creates 2 backend docs (api_spec.md, database_schema.md). Invoked when hasBackend or hasDatabase detected.

Story-level quality orchestrator with 4-level Gate (PASS/CONCERNS/FAIL/WAIVED) and Quality Score. Delegates to ln-510 (quality) and ln-520 (tests), calculates final verdict.

Orchestrates test planning pipeline (research → manual → auto tests). Coordinates ln-521, ln-522, ln-523.