CAIN-42 invariant · E41

E41-F2T-REGRESSION: failure-to-test stage REGRESSION exists

Held · CAIN-42 Evolution 41 -- Machine Agency Exchange Fabric

Last reviewed 2026-10-01

held niche Benchmarks, coverage & performance · family f2t

What this rule means

CAIN-42 must always satisfy: failure-to-test stage REGRESSION exists. It is one of 470 invariants checked for CAIN-42 Evolution 41 -- Machine Agency Exchange Fabric. An invariant is a rule the system may never break, whatever an agent or attacker does; the test suite tries to break it across many scenarios and records the result.

Recorded detail

'REGRESSION'

Verify it in your browser

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Check it yourself

Browse the raw bundle · How to reproduce it · SHA-256 manifest

Scope: An in-process TESTED library; not hosted. Federation, trust domains, economics and supply chains are modelled in-process; there are no external counterparties or organizations.

Related rules

E41-CAT-law: every law scenario holds
E41-CAT-relationship: every relationship scenario holds
E41-CAT-discovery: every discovery scenario holds
E41-CAT-attest: every attest scenario holds
E41-CAT-negotiation: every negotiation scenario holds
E41-CAT-handshake: every handshake scenario holds
E41-CAT-contract: every contract scenario holds
E41-CAT-work: every work scenario holds

← E41-F2T-ATTACK_SCENARIO · all 470 · E41-F2T-EVIDENCE →

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