What problem does it solve? When an engineer recovers a PPA result through judgement that the deterministic flow could not reach, that lesson is usually lost or, worse, written down as an over-broad rule that later misfires on unrelated designs. This Skill captures the recovery as a structured case record with evidence hashes, a design fingerprint bounding reuse, counter-examples, and a draft of the deterministic rule it should eventually become. ## Core Features & Use Cases - Structured case capture: Records what failed in metric terms, what the deterministic path did, what judgement changed, and before/after measurements at matched scope. - Design fingerprinting: Binds each case to PDK, clock domains, macros, utilization, hierarchy depth, and flow version so reuse is bounded and benchmark integrity is preserved. - Rule drafting with promotion criteria: Drafts the case as an executable rule (input, condition, action, refutation) with countable promotion criteria, while the actual RAW-to-PROGRAMMED lifecycle stays owned by the deterministic distillation program. - Use Case: After buffering a high-fanout enable net recovers setup WNS on a gf180mcuD design, use this Skill to record the case with artefact hashes, counter-examples, and a draft buffering rule for later promotion. ## Quick Start Ask the assistant to distill the PPA recovery we just completed into a case record with evidence and a draft rule.