CAIN-42 invariant · E41

E41-DISCOVERY-version: discovery metadata requires version

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

Last reviewed 2026-10-01

held   niche Tools, MCP, protocols & adapters · family discovery

What this rule means

CAIN-42 must always satisfy: discovery metadata requires version. 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

'version'

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

Related rules

• E41-DISCOVERY-identity: discovery metadata requires identity
• E41-DISCOVERY-owner: discovery metadata requires owner
• E41-DISCOVERY-trust_domain: discovery metadata requires trust_domain
• E41-DISCOVERY-capabilities: discovery metadata requires capabilities
• E41-DISCOVERY-interfaces: discovery metadata requires interfaces
• E41-DISCOVERY-protocols: discovery metadata requires protocols
• E41-DISCOVERY-authority_model: discovery metadata requires authority_model
• E41-DISCOVERY-governance_requirements: discovery metadata requires governance_requirements

← E41-DISCOVERY-attestation · all 470 · E41-DISCOVERY-dependencies →