Track SPM-specific input gaps: housing, WIC, school meals, child support, workers comp, and expense deductions

Problem

SPM-specific poverty resource and deduction components need explicit Populace handling so the resource definition is complete and release diagnostics show unsupported families rather than silently omitting them.

Relevant families:

• HUD housing assistance / capped housing subsidy resources.
• USDA WIC resources.
• USDA school lunch/breakfast resources.
• HHS OCSE child support received and paid.
• Workers' compensation benefits.
• MOOP, work expenses, and childcare expense validation/imputation benchmarks.

Scope

For each family:

1. Identify the relevant PolicyEngine-US input/output variables and whether Populace should store an input, impute an upstream input, or let the engine compute a formula-owned variable.
2. Identify source status and whether an Arch source package exists.
3. If source data are missing, make release diagnostics report the family as unsupported/source-gap.
4. Once source-backed inputs exist, add Populace imputation/target mapping and tests.

Acceptance criteria

• A Populace US SPM component inventory exists with model variables, formula/store decision, source status, and release behavior.
• Missing source families are surfaced in release diagnostics/manifest as source gaps.
• Populace does not hard-target CPS SPM values to fill these gaps.
• Where source-backed inputs are available, tests confirm inputs or upstream formula inputs are populated.

Start by inventorying the listed PolicyEngine-US SPM variables, their formula/store decisions, and whether an Arch source package exists. Then inspect the release diagnostics/manifest and existing Populace mappings; done means every family is classified, source gaps are surfaced, CPS SPM values are not hard-targeted, and source-backed inputs have coverage tests.