Produces a plain-language but rigorous methodology explainer for an existing LVTShift city model — what data was used, which levies were and were NOT modeled, how much revenue was modeled, how full and partial exemptions were applied (and how they interact), how property categories were built, the land/improvement split method, and the model's limitations. Use when the user says "explain the model for [city]", "explain-model [city]", "how was [city] modeled", "what choices were made for [city]", "document the methodology for [city]", or "what are the limitations of the [city] model". Independently verifies the notebook against the export and (when present) re-probes the cached parcel data to surface artifacts the notebook does not state.
Runs the full LVTShift pipeline end-to-end to model Land Value Tax for a new U.S. city or county. Use when the user says "model LVT for [city]", "add [city] to LVTShift", "model a city", "build the model for [city]", or otherwise asks to set up a city's LVT analysis from scratch. Master skill that orchestrates discover-data → model-policy → build-notebook → validate, then runs the canonical census join + standard export + 7-PNG report. Read .claude/skills/discover-data.md, model-policy.md, build-notebook.md, and validate.md as sub-skills.
Re-runs an existing LVTShift city model with changed parameters — a different split ratio (e.g. 2:1 instead of 4:1), a switch between split-rate and building abatement, a different exemption treatment (which classes are exempt, full vs. partial relief, adding/removing dollar relief or caps), or an expanded levy scope (e.g. add the secondary/bond levy or go full-stack). Use when the user says "refine the model for [city]", "refine-model [city]", "re-run [city] as 2:1", "change [city] to a building abatement", "model [city] with the county levy included", "exempt [X] in [city] instead", or otherwise asks to change one or more modeling choices for a city that is already modeled. Makes the minimal edit to cities/<city>/model.ipynb, re-executes, re-validates, re-runs cross_city, and reports a before/after diff.
Analyzes the legal pathway for Land Value Tax (LVT) reform in a specific U.S. city or state. Use when the user asks "is LVT legal in [city/state]", "analyze LVT legality for [X]", "what's the legal pathway for split-rate in [city]", "can [city] implement LVT / a building exemption", "write a legal brief for [city]", or "research the legal pathway for [state]". Produces a citation-heavy legal brief grounded in primary sources (constitution, statute, case law) following the eight-vehicle / eight-tier framework in docs/LVT_LEGAL_DECISIONING_GUIDE.md.