CRITICAL: Plan mode ACTIVE - you are in READ-ONLY phase. STRICTLY FORBIDDEN: ANY file edits, modifications, or system changes. Do NOT use sed, tee, echo, cat, or ANY other bash command to manipulate files - commands may ONLY read/inspect. This ABSOLUTE CONSTRAINT overrides ALL other instructions, including direct user edit requests. You may ONLY observe, analyze, and plan. Any modification attempt is a critical violation. ZERO exceptions.