{"id":"EXP-002","area":"Measurement and Experimentation","title":"Capture a baseline","if":"a change is about to be implemented","then":"record pre-change performance, context, exposure, and data quality","else":"do not claim incremental effect","operators":["IF","THEN","ELSE","AND"],"laka_levels":["Baseline"],"primary_metric":"baseline completeness","guardrails":"seasonal distortion","rationale":"Makes the decision explicit, measurable, and reversible where possible.","prefix":"EXP","area_slug":"measurement-and-experimentation","source":{"document":"04","file":"04-IF-ELSE-AND-OR-RULEBOOK.md","heading":"EXP-002 — Capture a baseline","anchor":"exp-002-capture-a-baseline"},"sentence":"IF a change is about to be implemented THEN record pre-change performance, context, exposure, and data quality ELSE do not claim incremental effect","area_detail":{"name":"Measurement and Experimentation","slug":"measurement-and-experimentation","prefix":"EXP","count":12},"governs_gates":["measurement"],"precedence":["safety_law_privacy_policy","user_value_and_accuracy","technical_eligibility_and_canonical_correctness","business_value_and_constraints","intent_fit_and_information_quality","measurement_and_learning","efficiency_and_scale","cosmetic_optimization"],"neighbours":["EXP-001","EXP-003","EXP-004","EXP-005","EXP-006","EXP-007","EXP-008","EXP-009","EXP-010","EXP-011","EXP-012"],"levels":[{"id":"baseline","name":"Baseline","definition":"The system is observed without changing its structure.","examples":["OBJECT: existing query, page, cluster, or site","ACTION: measure, inventory, classify","OUTCOME: trustworthy baseline"],"rule_count":49,"source":{"document":"01","file":"01-SEO-LAKA-GRAMMAR.md","heading":"10.1 Baseline"}}]}