# Sprint 94 Plan: Zero-Trust Execution and Hardened Isolation

## Context

As extensibility increases, execution security must move toward zero-trust defaults.
Sprint 94 hardens adapter/plugin/verifier execution boundaries.

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## Goals

1. Enforce zero-trust execution policies for all external components
2. Add stronger isolation boundaries and privilege minimization
3. Improve tamper detection and forensic traceability
4. Reduce blast radius of compromised integrations

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## Steps

### Step 1169: Zero-trust policy model for execution surfaces (12 tests)
### Step 1170: Fine-grained capability grant engine (10 tests)
### Step 1171: Hardened sandbox profile library (10 tests)
### Step 1172: Integrity attestation packet schema (10 tests)
### Step 1173: Tamper detection and forensic event pipeline (10 tests)
### Step 1174: Incident containment automation for compromised components (8 tests)
### Step 1175: `whetstone_get_execution_attestation` MCP tool (8 tests)
### Step 1176: `whetstone_set_zero_trust_policy` MCP tool (8 tests)
### Step 1177: Security hardening report artifact (8 tests)
### Step 1178: Sprint 94 integration summary + regression (8 tests)

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## Security Rule

- External components run with least privilege and explicit capability grants only.