# Sprint 68 Plan: Corpus Expansion and Gold Standard Benchmarks

## Context

Long-term quality depends on a representative corpus. Sprint 68 creates a broad,
versioned benchmark corpus across paradigms and pair classes.

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## Goals

1. Build and version gold corpora by language family
2. Add benchmark tiers (unit, module, service, legacy project)
3. Support reproducible benchmark replay
4. Publish benchmark-driven pair scorecards

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## Steps

### Step 909: Corpus manifest schema v1 (12 tests)
### Step 910: Corpus ingestion tooling and normalization (10 tests)
### Step 911: Gold benchmark curation pipeline (10 tests)
### Step 912: Replay runner with deterministic seeds/artifacts (10 tests)
### Step 913: Benchmark scorecard generator per pair (10 tests)
### Step 914: Corpus version diff and migration tools (8 tests)
### Step 915: `whetstone_run_pair_benchmark` MCP tool (8 tests)
### Step 916: `whetstone_get_pair_scorecard` MCP tool (8 tests)
### Step 917: Benchmark publication bundle (8 tests)
### Step 918: Sprint 68 integration summary + regression (8 tests)

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## Benchmark Rule

- Stable-tier promotions require passing the current gold benchmark set.