Reproduce, investigate, fix, and verify local TypeScript web application behavior by driving the real app in a browser, correlating each interaction with System Atlas traces in .atlas/atlas.db, and inspecting the exact underlying source, callers, dependencies, configuration, and tests. Use for browser-visible failures, unexpected or repeated calls, slow functions, runtime versus static graph differences, specific Atlas traces, and evidence-backed post-fix verification.
2026-07-22