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>

sprint90_plan.md

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+# Sprint 90 Plan: Decade-Scale Roadmap Lock and Governance Refresh
+
+## Context
+
+Sprint 90 consolidates long-term governance, refreshes constitutional program
+assumptions, and sets the next decade-scale direction.
+
+---
+
+## Goals
+
+1. Refresh governance model with accumulated program evidence
+2. Lock next long-horizon roadmap phases and review cadence
+3. Formalize deprecation, succession, and stewardship policies
+4. Publish program constitution update and operating handbook
+
+---
+
+## Steps
+
+### Step 1129: Governance model refresh framework (12 tests)
+### Step 1130: Long-horizon roadmap planning engine v2 (10 tests)
+### Step 1131: Stewardship and ownership policy model (10 tests)
+### Step 1132: Deprecation/succession lifecycle framework (10 tests)
+### Step 1133: Constitutional invariants compliance checker (10 tests)
+### Step 1134: Governance change-impact simulator (8 tests)
+### Step 1135: `whetstone_get_governance_state` MCP tool (8 tests)
+### Step 1136: `whetstone_publish_roadmap_epoch` MCP tool (8 tests)
+### Step 1137: Program constitution + handbook publication bundle (8 tests)
+### Step 1138: Sprint 90 integration summary + full-program regression (8 tests)
+
+---
+
+## Constitutional Rule
+
+- Governance changes must preserve core safety and review invariants.