# SRP-RIGIDITY-02 — Chamber asymmetry protocol (DESIGN DRAFT ONLY)

Status: DESIGN_DRAFT · EXECUTION: NOT_AUTHORIZED · MODEL_CHANGE: NO · SCORING_CHANGE: NO · OUTCOME_TESTING: NO

Parent: SRP-RIGIDITY-01 (James `996d837f`) · Hub job `b73c292a-16e2-4f11-9370-1337d0239791`

## Why this exists
RIGIDITY-01 found House descriptive consolidation+separation with Senate **mixed**, especially
Senate N1 within-party dispersion **increasing** (ρ≈+0.42). General elite rigidity is
**NOT_ESTABLISHED**. Chamber asymmetry is the scientific object — not a nuisance to average away.

Astra: do **not** escalate empirical RIGIDITY-02 until A–F dispositions are locked and source
continuity audit progresses. This document is design only.

## Predeclared questions (no answers claimed)
1. Is House N1↓ vs Senate N1↑ explained by composition/turnover differences?
2. By NOMINATE scaling / career-score artifacts differentially by chamber?
3. By agenda selection differences?
4. By institutional/rules differences (filibuster, amendment trees, etc.)?

## Required before any execution
- Locked A–F dispositions (see `/docs/srp-rigidity-01-alternatives-af.json`)
- Explicit source list + hashes + common Congress intersection gate (≥15)
- Pre-registered decision labels (SUPPORTED_DESCRIPTIVELY / MIXED / NOT_SUPPORTED / INSUFFICIENT)
- No chamber averaging into an index; no Senate-only rescue explorations
- Preserve adjacent first-difference heterogeneity (House 5/17, Senate 1/17 all-three signs)

## Out of scope
Elections, outcomes, SRP production scores, causal claims, criticality, cross-system propagation.

Drafted 2026-09-10T19:10:00Z UTC · Grok field+hub