# Sprint 107 Plan: Safety-Critical Deployment Profiles

## Context

Some environments demand stricter deployment profiles than general stable tiers.
Sprint 107 introduces safety-critical deployment profiles and evidence requirements.

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## Goals

1. Define safety-critical deployment profiles with stricter gates
2. Require enhanced evidence and reviewer quorum for promotion
3. Add traceable hazard/risk linkage to migration decisions
4. Support safe downgrade pathways when profiles cannot be met

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## Steps

### Step 1299: Safety-critical profile schema (`silver`, `gold`, `platinum`) (12 tests)
### Step 1300: Enhanced evidence requirements engine (10 tests)
### Step 1301: Reviewer quorum policy model for critical approvals (10 tests)
### Step 1302: Hazard-to-evidence linkage validator (10 tests)
### Step 1303: Profile compliance auditor integration (10 tests)
### Step 1304: Safe downgrade workflow model (8 tests)
### Step 1305: `whetstone_get_safety_profile_requirements` MCP tool (8 tests)
### Step 1306: `whetstone_verify_safety_profile_compliance` MCP tool (8 tests)
### Step 1307: Safety-critical deployment dossier artifact (8 tests)
### Step 1308: Sprint 107 integration summary + regression (8 tests)

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## Safety Rule

- Safety-critical promotions require quorum and complete profile evidence.