# Sprint 98 Plan: Multimodal Evidence and Artifact Verification

## Context

Some migrations involve diagrams, protocol specs, and non-code artifacts.
Sprint 98 extends verification to multimodal evidence.

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## Goals

1. Normalize non-code artifacts into verification evidence model
2. Link multimodal artifacts to semantic claims and risks
3. Improve confidence for architecture-level migrations
4. Prevent evidence gaps caused by code-only evaluation

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## Steps

### Step 1209: Multimodal evidence schema extension (12 tests)
### Step 1210: Diagram/spec artifact ingestion adapters (10 tests)
### Step 1211: Architecture claim linkage engine (10 tests)
### Step 1212: Cross-artifact consistency checker (10 tests)
### Step 1213: Multimodal evidence completeness scoring model (10 tests)
### Step 1214: Verification gate integration for architecture artifacts (8 tests)
### Step 1215: `whetstone_attach_multimodal_evidence` MCP tool (8 tests)
### Step 1216: `whetstone_verify_architecture_consistency` MCP tool (8 tests)
### Step 1217: Multimodal verification dossier template (8 tests)
### Step 1218: Sprint 98 integration summary + regression (8 tests)

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## Evidence Rule

- High-level architecture claims must include linked supporting artifacts.