swmm-paramslisted

# SWMM Params (MVP mapping layer) ## What this skill provides - Transparent CSV-to-JSON mapping for: - land use class -> SWMM `[SUBCATCHMENTS]` + `[SUBAREAS]` defaults - soil texture/type -> SWMM `[INFILTRATION]` (Green-Ampt) defaults - Deterministic, auditable outputs with explicit fallback usage and unmatched-key reporting. - Optional merge step that emits one builder-ready JSON artifact. ## Scripts - `scripts/landuse_to_swmm_params.py` - maps `subcatchment_id + landuse_class` to runoff/subarea parameters - `scripts/soil_to_greenampt.py` - maps `subcatchment_id + soil_texture` to Green-Ampt infiltration parameters - `scripts/merge_swmm_params.py` - merges outputs from the two mapping scripts into one JSON package for future `swmm-builder` ## Default lookup tables By default, scripts read bundled lookup CSVs: - `skills/swmm-params/references/landuse_class_to_subcatch_params.csv` - `skills/swmm-params/references/soil_texture_to_greenampt.csv` You can override lookup paths with CLI flags. ## Minimal input format Land use input CSV: - required columns: `subcatchment_id`, `landuse_class` Soil input CSV: - required columns: `subcatchment_id`, `soil_texture` Example files are provided under `examples/`. ## Outputs Each mapper writes explicit JSON containing: - `records` (row-level audit trail) - `sections` (SWMM-oriented lists keyed by subcatchment) - `unmatched_*` lists (rows that used fallback) - `counts` summary The merge script writes: - `sections` (`subcatc