WIP: stage all uncommitted work — sprints 46-221, graduation headers, specialist fleet, test steps 909-1988

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sprint143_plan.md

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+# Sprint 143 Plan: AST-to-Text Deterministic Regeneration with C++ Style Guards
+
+## Context
+
+Hybrid authoring requires AST changes to regenerate readable, stable C++ source.
+Sprint 143 adds deterministic regeneration with style/format guardrails.
+
+---
+
+## Goals
+
+1. Regenerate C++ text from AST with stable formatting
+2. Preserve user style profile and ordering where policy allows
+3. Minimize noisy diffs from semantically neutral changes
+4. Expose regeneration decisions for auditability
+
+---
+
+## Steps
+
+### Step 1669: AST-to-text regeneration policy schema (10 tests)
+### Step 1670: C++ formatting/styling guard model (10 tests)
+### Step 1671: Stable include/order regeneration model (10 tests)
+### Step 1672: Semantic-noise diff suppressor model (10 tests)
+### Step 1673: `whetstone_regenerate_text_from_ast` MCP tool (8 tests)
+### Step 1674: `whetstone_preview_regenerated_diff` MCP tool (8 tests)
+### Step 1675: `whetstone_get_regeneration_decisions` MCP tool (8 tests)
+### Step 1676: Regeneration quality scorer model (8 tests)
+### Step 1677: Regeneration stability report artifact (8 tests)
+### Step 1678: Sprint 143 integration summary + regression (8 tests)
+
+---
+
+## Architecture Gate
+
+- Regeneration must be deterministic and reproducible
+- Style guard output must avoid non-semantic churn
+- Decision logs must be structured and machine-readable
+- Max 600 lines per header