CAIN-42 invariant · E25

I-ADAPTER-grpc-token_single_use: grpc: token_single_use

Held · CAIN-42 Evolution 25 -- Universal Machine Agency Fabric

Last reviewed 2026-10-01

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

What this rule means

CAIN-42 must always satisfy: grpc: token_single_use. It is one of 501 invariants checked for CAIN-42 Evolution 25 -- Universal Machine Agency 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

{'first': 'EXECUTED', 'second': 'REFUSED'}

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: {"limitation": "In-process governance library. Protocol adapters normalize REFERENCE messages; no third-party agent, MCP server or A2A peer has been governed.", "status": "SCOPE"}

Related rules

I-ADAPTER-a2a-events_recorded: a2a: events_recorded
I-ADAPTER-a2a-signed_envelope_identity: a2a: signed_envelope_identity
I-ADAPTER-a2a-unsigned_envelope_refused: a2a: unsigned_envelope_refused
I-ADAPTER-a2a-unmapped_operation_refused: a2a: unmapped_operation_refused
I-ADAPTER-a2a-relabel_refused: a2a: relabel_refused
I-ADAPTER-a2a-deny_respected: a2a: deny_respected
I-ADAPTER-a2a-commit_without_allow_refused: a2a: commit_without_allow_refused
I-ADAPTER-a2a-executor_sealed: a2a: executor_sealed

← I-ADAPTER-grpc-parameter_mutation_refused · all 501 · I-ADAPTER-grpc-binding_change_invalidates →

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