Deterministic UK postcode validation with country/local-authority/region/centroid attribution from a bundled ONS National Statistics Postcode Lookup snapshot (OGL v3.0). Batch with dedupe rollup. No live APIs, no scraping, pure local computation.
Deterministic text quality metrics: word/sentence counts, Flesch readability, top-N word frequency, and style warnings. Pure local computation, no external APIs, no secrets.
Deterministic CSV cleaning for agent pipelines: typed column sniffing, header normalisation, validation with per-row drop reasons, and exact/near dedupe. Zero network at runtime, zero keys, pure local computation. Every drop is reported; values are never guessed or fuzzy-rewritten.