# Sprint 159 Plan: Determinism, Transactions, and Replay Runtimeization

## Context

This sprint replaces placeholder logic in replay and transaction tools with
stateful deterministic behavior tied to representative language operations.

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## Goals

1. Implement replay suite execution against stored constructive traces
2. Add transaction begin/resume/rollback runtime semantics
3. Compute deterministic gate status from replay and transaction outcomes
4. Emit structured artifacts for divergence and recovery analysis

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## Steps

### Step 1829: Multi-language replay corpus runtime index model (10 tests)
### Step 1830: Replay comparison and divergence classification runtime model (10 tests)
### Step 1831: Constructive transaction ledger runtime model (10 tests)
### Step 1832: Resume and rollback policy runtime model (10 tests)
### Step 1833: `whetstone_run_constructive_replay_suite` runtime implementation (8 tests)
### Step 1834: `whetstone_compare_constructive_replays` runtime implementation (8 tests)
### Step 1835: `whetstone_begin`/`resume`/`rollback_constructive_transaction` runtime implementation (8 tests)
### Step 1836: Determinism and recovery qualification packet model (8 tests)
### Step 1837: Replay/transaction reliability report artifact (8 tests)
### Step 1838: Sprint 159 integration summary + regression (8 tests)

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## Architecture Gate

- Replay and transaction decisions must be deterministic and auditable
- Rollback must preserve prior consistent state per transaction id
- Divergence output must include machine-readable root-cause classification
- Max 600 lines per header