Forces a full step-back re-analysis when a fix or refactor is not working: traces the whole execution path end-to-end — entry point to exit, every block, every contract boundary, and the full data flow — instead of patching in isolation. Three modes: `fix` (default) for bugs and broken behavior, `refactor` for restructuring, and `review` for PR validation (returns intent-match and system-fit findings for the `pr-reviewer` agent to consume — never run standalone for routine review work). Trigger ONLY once at least one isolated fix attempt has already failed, or on an explicit request for a full execution-path analysis: "step back", "think holistically", "analyze the whole thing", "zoom out", "look at the bigger picture", and "rethink this" qualify in that context only. Never for trivial one-line fixes or first-attempt debugging. Also triggers on "/holistic", "/step-back", "/rethink", "/zoom-out".