# Sprint 148 Plan: Generic Text-to-AST Incremental Synchronization Engine

## Context

Sprint 148 implements shared incremental text-to-AST synchronization logic that
works across language adapters via explicit adapter hooks.

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## Goals

1. Implement language-neutral incremental sync engine contracts
2. Support adapter-provided delta parsing and node identity policies
3. Emit deterministic diagnostics and confidence scoring across languages
4. Validate repeated edit streams in at least two languages

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## Steps

### Step 1719: Generic incremental edit packet schema (10 tests)
### Step 1720: Adapter sync hook contract model (10 tests)
### Step 1721: Cross-language node identity preservation policy model (10 tests)
### Step 1722: Sync diagnostics normalization model (10 tests)
### Step 1723: `whetstone_sync_text_to_ast_generic` MCP tool (8 tests)
### Step 1724: `whetstone_get_sync_trace_generic` MCP tool (8 tests)
### Step 1725: `whetstone_compare_sync_outcomes` MCP tool (8 tests)
### Step 1726: Cross-language sync confidence packet model (8 tests)
### Step 1727: Generic sync determinism report artifact (8 tests)
### Step 1728: Sprint 148 integration summary + regression (8 tests)

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## Architecture Gate

- Sync engine must be adapter-driven, not language-hardcoded
- Determinism checks must pass for identical edit streams per language
- Diagnostics must remain normalized and machine-readable across adapters
- Max 600 lines per header