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>

sprint145_plan.md

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+# Sprint 145 Plan: C++ Constructive Editor Fast Path and Toolchain Integration
+
+## Context
+
+To unlock immediate value, hybrid mode must feel native for C++ teams. Sprint 145
+optimizes the C++ constructive fast path end-to-end.
+
+---
+
+## Goals
+
+1. Optimize C++ edit->sync->build->feedback loop latency
+2. Integrate compile/test diagnostics directly into hybrid editing flow
+3. Prioritize battle-tested C++ paths while AST-native language work continues
+4. Provide one-call C++ constructive loop orchestration
+
+---
+
+## Steps
+
+### Step 1689: C++ constructive loop state model (10 tests)
+### Step 1690: Incremental compile feedback packet model (10 tests)
+### Step 1691: C++ test-feedback bridge model (10 tests)
+### Step 1692: C++ loop latency budget enforcer model (10 tests)
+### Step 1693: `whetstone_run_cpp_constructive_step` MCP tool (8 tests)
+### Step 1694: `whetstone_get_cpp_constructive_status` MCP tool (8 tests)
+### Step 1695: `whetstone_run_cpp_constructive_loop` MCP tool (8 tests)
+### Step 1696: C++ constructive readiness scorer model (8 tests)
+### Step 1697: C++ constructive loop report artifact (8 tests)
+### Step 1698: Sprint 145 integration summary + regression (8 tests)
+
+---
+
+## Architecture Gate
+
+- C++ loop behavior must be deterministic and bounded
+- Feedback packets must be structured and machine-readable
+- One-call loop tool must expose explicit stop reasons
+- Max 600 lines per header