Resilience Skills

The resil-* family hardens AI workflows against failures, drift, and adversarial conditions. These skills borrow concepts from biological systems and control theory.

Skills

Skill ID	Description	Model Class
resil-homeostatic	PID-controller-style setpoint maintenance: detects drift from target quality and applies corrective action	strong
resil-membrane	Isolation membranes between workflow stages: prevents fault propagation across skill boundaries	cheap
resil-redundant-voter	Runs N independent model instances on the same input; majority vote determines output	cheap
resil-replay	Replays failed skill executions with modified context or different model to recover from transient errors	cheap
resil-clone-mutate	Clones a solution and applies structured mutations to explore the solution space around a local optimum	strong

Concepts

resil-homeostatic — PID Control

Treats output quality as a controlled variable with a setpoint. When metrics drift:

• Proportional: immediate correction proportional to error magnitude
• Integral: accounts for accumulated error over multiple runs
• Derivative: anticipates trend based on rate of change

resil-membrane — Fault Isolation

Inspired by cell membranes, this skill defines permeability rules for what can cross skill boundaries. A failing skill cannot corrupt state visible to adjacent skills.

resil-redundant-voter — Majority Vote

Input
  ├── Model instance A  → answer X
  ├── Model instance B  → answer X  ← majority
  └── Model instance C  → answer Y
              ↓
          Output: X (majority vote)

When to Use

Situation	Skill(s)
High-stakes output requiring confidence	resil-redundant-voter
Workflow quality degrading over time	resil-homeostatic
Transient model errors causing failures	resil-replay
Need to explore solutions beyond local optimum	resil-clone-mutate
Isolating a flaky skill from the rest	resil-membrane

Instructions That Invoke These Skills

• resilience — primary consumer; all five coordinated
• orchestrate — uses resil-membrane as default isolation between agents
• govern — uses resil-redundant-voter for critical policy decisions