under-shirt

name	under-shirt
description	Use Under Shirt when a catastrophic failure is possible and the system needs a last-resort failsafe that prevents total collapse, leaving it barely functional instead of dead.

Under Shirt

Survive the unsurvivable by the thinnest margin.

Overview

Use Under Shirt when a catastrophic failure is possible and the system needs a last-resort failsafe that prevents total collapse, leaving it barely functional instead of dead.

This is the secondary Codex compatibility rendering of a hybrid battle-chip pattern with a shipping-now execution model.

Canonical chip family: Under Shirt Codex shelf: Defense and Recovery Provider target: Codex compatibility surface.

When To Use

• Before deploying a high-risk change that could catastrophically break the system, wire up a last-resort rollback or kill switch.
• A service is in a fragile state and needs a failsafe that prevents total data loss or full outage.
• Setting up incident response and needing a dead-man switch that keeps the system barely functional through worst-case scenarios.

Workflow

1. Identify the catastrophic failure path — the exact scenario where total collapse is possible.
2. Install a minimal survival mechanism at the critical point: a rollback checkpoint, circuit breaker, or data snapshot.
3. Verify the failsafe triggers correctly under simulated lethal conditions and document that it exists.

Deliverables

• A one-shot failsafe mechanism that prevents total system collapse.
• Documentation marking the failsafe's location, trigger condition, and that it is a last-resort safety net.

Guardrails

• This is a one-time, last-resort safety net — not a defense strategy. If you rely on it repeatedly, fix the underlying problem.
• The failsafe must leave the system in a minimum viable state, not silently corrupted.
• Never let the existence of an Under Shirt failsafe justify riskier deployments.

Default Invocation

Use Under Shirt to install a last-resort failsafe that prevents total catastrophic collapse, leaving the system barely functional if the worst case happens.