# Sprint 209 Plan: Cross-Language Hard-Spec Parity Gate

## Context
Hard semantic specs show large readiness asymmetry across languages.

## Goals
1. Add cross-language parity benchmark runner
2. Compute parity deltas by category and failure class
3. Gate promotion on maximum allowed parity skew

## Steps

### Step 2084: Hard-spec parity matrix runner (10 tests)
Run aligned spec sets across target language matrix and collect comparable metrics.

### Step 2085: Parity skew analyzer (10 tests)
Compute readiness/failure skew by language and category.

### Step 2086: Parity threshold policy gate (8 tests)
Block promotion if parity skew exceeds configured threshold.

### Step 2087: Parity diagnostics export (8 tests)
Emit top skewed categories and dominant root-cause classes.

### Step 2088: Sprint 209 Integration Summary (8 tests)
Add `editor/src/Sprint209IntegrationSummary.h`.

## Architecture Gate
- Hard-spec promotion requires bounded cross-language readiness skew.