# Sprint 199 Plan: Long-Range Edit Reliability IV (Benchmarks)

## Context
Reliability claims need dedicated benchmark evidence.

## Goals
1. Add long-range benchmark corpus
2. Measure success, rollback, and drift rates
3. Gate promotion on benchmark thresholds

## Steps

### Step 2034: Long-range benchmark corpus setup (10 tests)
Create fixtures for multi-module and cross-file transformations.

### Step 2035: Benchmark runner and metrics export (10 tests)
Emit success/rollback/drift metrics per benchmark.

### Step 2036: Reliability threshold gate (8 tests)
Block promotion when benchmark thresholds fail.

### Step 2037: Benchmark trend regression detector (8 tests)
Detect reliability regressions against baseline runs.

### Step 2038: Sprint 199 Integration Summary (8 tests)
Add `editor/src/Sprint199IntegrationSummary.h`.

## Architecture Gate
- Promotion requires passing long-range reliability benchmark thresholds.