epd-to-spec

# /epd-to-spec — EPD Specification Writer Takes EPD data, GWP limits, or a materials list and generates CSI-formatted specification sections that require Environmental Product Declarations and set maximum Global Warming Potential thresholds. Output follows the same three-part CSI SectionFormat used by `/spec-writer`. ## Input The user provides one or more of: 1. **Material list with GWP limits** — "concrete max 350 kg CO2e/m3, rebar max 1.0 kg CO2e/kg" 2. **EPD data from the sheet** — "use the EPDs I saved to set thresholds" 3. **Comparison report** — "use the lowest GWP from my last comparison as the max" 4. **LEED target** — "we're pursuing LEED v4.1 MRc2 Option 2" 5. **Verbal description** — "write EPD requirements for a ground-up office, concrete and steel structure, curtain wall" 6. **Project type** — helps determine which CSI divisions need EPD language If the user invokes the skill without input, ask: 1. **What materials need EPD requirements?** (paste a list, reference the sheet, or describe the project) 2. **Do you have specific GWP thresholds, or should I use industry baselines?** ## CSI Divisions Where EPDs Are Most Common Map materials to the correct division. EPD requirements are most relevant for structural, envelope, and interior finish materials: | Division | Title | Common EPD Products | |----------|-------|-------------------| | 03 30 00 | Cast-in-Place Concrete | Ready-mix concrete | | 03 40 00 | Precast Concrete | Precast panels, structural precas...