A11 agent systems / evidence gates

A11 / Skills

Skills are capabilities with boundaries.

A skill should define what an agent may inspect, which tools it can use, what evidence it must produce, and when it must stop.

Capability contractA11 / 03

Know the tool.
Know the limit.
Know the proof.

Agent capabilityStop condition

Specialisation without unrestricted access.

Skills turn a general agent into a disciplined operator for a defined job. The boundary is part of the capability, not an afterthought.

01

Discovery

Find relevant resources without broad, uncontrolled inspection.

02

Build

Produce implementation artefacts with repeatable validation.

03

Security

Detect credential, permission, privacy, and data-loss risks.

04

Handoff

Convert verified work into an accountable next action.

Skill contract

A good skill tells the agent when to stop.

Every capability should expose its inputs, allowed tools, prohibited actions, expected artefacts, and validation method.

Next surface

See how evidence turns capability into a decision.