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tri-debug
Three independent root-cause analyses of a hard bug or failure — smart + general + fast model tiers diagnose in parallel, then theories are compared and reconciled. Use when the user asks for tri-debug, triple debug, three-way debugging, multi-model diagnosis, parallel debug, consensus root-cause analysis, or is stuck on a hard bug and wants divergent hypotheses. Worth the extra cost when — the bug is hard (heisenbug, intermittent, cross-system), logs are ambiguous, the obvious fixes have already failed, or the user explicitly wants three independent theories before committing to one. Do NOT use for code review (use tri-review), security audits (use tri-security), or comparing greenfield implementation approaches (use tri-dispatch). Do NOT use for simple "what does this error mean" or routine null-check / typo bugs — a single pass is faster.
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