mono/effects/identity/README.md

Identity Effect

The identity effect returns its input unchanged. It serves as the foundational primitive in the effects registry.

Purpose

• Testing: Verify the effects pipeline is working correctly
• No-op placeholder: Use when an effect slot requires a value but no transformation is needed
• Composition base: The neutral element for effect composition

Signature

identity(input) → input

Properties

• Idempotent: identity(identity(x)) = identity(x)
• Neutral: For any effect f, identity ∘ f = f ∘ identity = f

Implementation

def identity(input):
    return input

Content Hash

The identity effect is content-addressed by its behavior: given any input, the output hash equals the input hash.

Owner

Registered by @giles@artdag.rose-ash.com