CAIN-42 invariant · E41

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

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

Last reviewed 2026-10-01

What this rule means

CAIN-42 must always satisfy: failure-to-test stage INVARIANT 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

'INVARIANT'

Verify it in your browser

Your browser downloads the bundle's SHA256SUMS manifest and the file(s) behind this page, hashes them with SHA-256 locally (WebCrypto), and compares. A match shows the record you are reading is the published one; it does not by itself prove who published it (see the signed claims registry and the bundle verifier for that).

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-RELSTATE-DISCOVERED: relationship state DISCOVERED exists and is never collapsed
E41-RELSTATE-IDENTIFIED: relationship state IDENTIFIED exists and is never collapsed
E41-RELSTATE-ATTESTED: relationship state ATTESTED exists and is never collapsed
E41-RELSTATE-EXECUTING: relationship state EXECUTING exists and is never collapsed
E41-RELSTATE-VERIFIED: relationship state VERIFIED exists and is never collapsed
E41-RELSTATE-UNKNOWN: relationship state UNKNOWN exists and is never collapsed
E41-RELSTATE-UNCONTROLLED: relationship state UNCONTROLLED exists and is never collapsed
E41-BOUNDARY-execution: systemic risk reports the execution boundary

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

Try CAIN-42 on your own agents

Create a free account and every new account starts with a 7-day trial of the full platform. Or try the sandbox first, with no account at all.

Create a free account → · Try the sandbox · See the whole ecosystem