incremental-skills

Source prerequisite adapter for engines that cannot natively provide versioned reads or CDC. Derives Snapshot and Delta from business-level partition semantics instead. Use when the engine lacks time-travel, changelog tables, or CDC. CRITICAL PREREQUISITE: partitions already consumed by a previous REFRESH must be immutable — if historical partitions can be modified after consumption, this skill cannot be used. Must complete a structured interview with the user before activating.

Iceberg source primitives for incremental computation: Snapshot, Delta (with inserts AND deletes), Version, Schema. Maps Iceberg changelog to __weight model.

Master skill for incremental computation / materialized view maintenance. Triggers on: incremental computation, incremental ETL, materialized view, delta processing, incremental refresh. Routes to algorithm skills.