2026-09-05 10:27:11 +00:00
1 changed files with 24 additions and 5 deletions
@@ -75,15 +75,34 @@ distinction is the answer to a question asked repeatedly and worth settling here
 twice is real duplication and the concern was right; collapsing the lifecycles is the other mistake
 and it is worse.

-**The exemption is not bureaucracy — it removes four states that make no sense.** If a node's own
-voice were an ordinary hired agent it could be **retired**, leaving a node nothing can talk to;
-**reassigned**, moving one machine's mind onto another; hired **twice**, with no answer to which
-replies when the node is addressed; or hired **not at all**, leaving a node with no voice. The
-exemption is what makes those unreachable.
+**It is provisioned the ordinary way and made immutable — not held outside the system.** The
+sentence above says *exempt from the hiring lifecycle*, and the precision matters: it is exempt
+from **hiring**, not from having a lifecycle. Its lifecycle is the **node's** — provisioned when
+the node enrols, retired when the node is retired. Same states, a different thing driving them.
+
+That distinction is what keeps it inside the model. A thing genuinely held outside would have to be
+special-cased by everything that lists agents; a thing provisioned normally and constrained is one
+row like any other, and the constraints are **checkable** rather than remembered:
+
+| | |
+|---|---|
+| **cannot be retired, reassigned, or deleted while its node exists** | it *is* that machine's voice — retiring it leaves a node nothing can talk to, moving it puts one machine's mind on another |
+| **exactly one per node** | with two, nothing decides which replies when the node is addressed; with none, the node is mute |
+| **may be disabled and re-enabled** | ordinary, and see below |
+| **its engram may be changed** | its existence is immutable, its personality is not — that is how a node is configured |

 [ADR 0001](0001-mesh-brokers-nodes-host-agents-think.md)'s *the two agent rows per node merge* is
 the same fact from the other side: **one per node** — not zero, and not two.

+**Disabled is a state that answers.** A node prompted while its agent is disabled replies saying
+so, immediately, without a model being invoked. It does not time out and it is not silence — the
+queue is still consumed, and the answer is the state.
+
+That is the whole reason disabling is better than not provisioning. A node with no agent is a
+silence somebody has to diagnose; a node whose agent is disabled tells you what is wrong in the
+reply. It is the same rule the host follows about a service that does not exist, applied here:
+**absence must never be indistinguishable from a failure to answer.**
+
 ### What is scoped, and what is not

 **Its tool list is its own and narrower than a session a person drives.** The same scoping any