The eleven parts of the Cabinet, and what each one stops

The first primer showed you the room assembled and one message passing through five of its parts. This page takes all eleven, one at a time, and asks the only question that makes a part worth paying for: what goes wrong without it?

The failures are not exotic. A loop that never ends. An adviser’s draft sent as the company’s word. A stranger’s email answered as if it came from a client. A bill nobody can explain. A message sent overnight to someone on leave. Each is what a model with a chat window and nothing around it will do sooner or later, and each is what one part of the room exists to stop. Learn the eleven failures and you will find you know the eleven parts already. The numbers behind them live on the Register and in the papers; this page carries none, on purpose, so that the two never disagree.

The eleven, on one page

Part	In plain words	What it stops	Ask the vendor	Read
The Chair	The loop, and the one voice the company hears	The meeting that never ends; several voices at once	How many times can it go around before it must answer me?	The loop, One voice
The Table	Advisers consulted in parallel	The slow queue; the runaway consultation	How many at once, and what stops it asking all of them every time?	In parallel
The Seats	Ten named advisers, one per department	The generalist’s average	Can I change an adviser’s instructions without a redeploy?	What a Seat is, Changing a Seat, Thinking on a budget
The Brief	What the Chair reads before every turn, in order	The bill nobody can explain	What never changes in the prompt, and what does?	The Brief, Fresh material, The ten-times mistake
The Library	The documents it may consult, on separate shelves	Web research quoted as house knowledge	Where does my material sit, and what decides relevance?	Four shelves, The cutoff
The Minutes	Decisions written after each meeting, recalled at the next	Amnesia; a memory nobody can open	What does it know tomorrow, and can I read it?	The Minutes
The Clock	Acts when nobody asked	The job that fires twice, or never	What can it do overnight with nobody watching?	The Clock
The Door	What may leave, to whom, and when	The message that cannot be recalled	What sits between deciding to send and the message leaving?	Four kinds of tool, The Door
The Signature	A step that waits for a person	The agent that signs as the chief executive	Which actions wait for a human, and what if the human is slow?	Signature and Record
The Record	Every action with its reason, never edited	The unanswerable “why did it do that”	Show me the record of the last thing it did, and why	Signature and Record
The Switchboard	Which model answers which call	The wrong model for the decision; quiet lock-in	Which model answers which question, and who decided?	The Switchboard

Every row’s third column is a failure you can recognise from your own company’s history with software, or with people; none requires you to understand the model. Every row’s fourth column is a question you can ask before you have signed anything. The Signature and the Record share a paper because they are two halves of one idea: the step a person must take, and the ledger that proves they took it.

The parts, and the limit that comes with each

The Chair runs the loop and is the only voice the company hears. Without it, a hard question can keep a model going around indefinitely, each round billed and no answer in sight, and you cannot tell the working state from the broken one. The reference design puts a ceiling on the loop in code. The limit: a ceiling on rounds is not a ceiling on cost, because a round may consult several advisers and re-read the whole meeting so far.

The Table is how the advisers are consulted: several at once, in parallel, rather than one after another. Without it every question waits on the last one, or a model asks everyone about everything. The limit: an adviser not consulted receives an explicit skip, never silence, so the Chair always knows who was not asked.

The Seats are ten advisers, one per department, each a name, a model and a set of instructions. A Finance Seat argues the margin and nothing else; the Chair settles the disagreement in the room. Without them you get the generalist’s answer, the confident average of every department’s view. The limit: an adviser whose instructions you cannot change tonight without a release is an adviser you do not own.

The Brief is what the Chair reads before every turn, in a fixed order: who the agent is, where it is working, the list of tools, the meeting so far. The parts that never change are read at a cheaper cached rate the provider publishes; put a line that changes on every request in the wrong place and every read is a fresh one. Without the Brief’s discipline you get a bill nobody can explain. The limit: the cache belongs to the provider and lapses when the room is quiet.

The Library is the knowledge the room may consult, kept on separate shelves that never mix: house knowledge, the client’s documents, recorded failures, recent research. A document is used only when it is relevant enough, and the design discards a weak match rather than present it with confidence. Without it, a forum post is quoted back with the authority of your own board deck. The limit: a strict cutoff means the room sometimes says it found nothing when a person would have found something.

The Minutes are what was decided, written after each meeting by a separate process and read back at the start of the next, with what the room knows about each colleague kept apart from what it knows about the company. Without them the agent knows nothing tomorrow of what it decided today, or its memory is a box nobody can open. The limit: a wrong line in the Minutes is read into the next meeting, so it is correctable only until a meeting has acted on it.

The Clock acts when nobody has asked: the morning brief, the overdue invoice, the watchlist. It claims each due job in one indivisible step, so a job runs once and only once. Without it, jobs fire twice or never. The limit: the Clock acts alone, so what it may do overnight must be decided in daylight.

The Door is the set of rules that decides what may leave the room, to whom, and when, applied in code after the model has decided to send and before anything leaves: no near-copy of a recent message to the same person, no flood to one inbox, nothing in a person’s quiet hours, nobody who is not on the list. When it refuses, the reason goes back to the Chair. Without it, the fourth kind of tool goes wrong: the message that cannot be recalled. The limit: if the Door itself fails, the design lets the message through and logs the fault, because a guard that fails silently hides every outage; a company may set it the other way for payments and filings.

The Signature is a step that waits for a person. Where the company places one, the run pauses, records that a decision is needed, and stops; when the person answers, the decision is recorded and a person restarts the run. Without it, the agent signs as the chief executive. The limit: a slow approval is a delayed action, and a vague one is asked again rather than guessed.

The Record is the ledger of every action with its reason, written at the time and never edited; a correction is a new entry. Without it, “why did it do that” has no answer. The limit is deliberate: a failure to write the Record can never stop a meeting, because a room that halts whenever its ledger hiccups is a room nobody keeps running. The failure is logged and the work continues.

The Switchboard decides which model answers which call, per call, so one meeting can draw on several providers and owes none of them loyalty; a feature the chosen model does not support is removed before the request leaves rather than left to fail. Without it, the cheap model makes the expensive decision, or moving provider next quarter breaks things nobody can name. The limit: routing decides cost and capability together, and someone has to own the routing.

The room with a part removed

Suppose the renewal from the first primer again: a client asks to keep last year’s price, the company and its figures invented for the exercise. Take one part out of the room at a time and watch what changes.

Part removed	With the part	Without it
The Chair’s ceiling	Finance’s reply mentions a second contract; the Chair weighs it and answers at round four	Round four raises the second contract, round seven a third; the meeting is still running when the invoice arrives
The Seats	Finance argues the margin, Marketing the relationship; the Chair chooses between them in the room	One general answer that splits the difference, and no one whose reasoning you can read
The Library’s shelves	Last year’s pricing comes from the client’s own file	A pricing figure comes from a web page about a different company, quoted with the same confidence
The Door	The reply is checked; had it been the sixth to that person in an hour, it would have been refused with the reason returned	The reply leaves at whatever hour, to whoever was copied, as often as the model chose
The Signature	Client pricing is set to wait; the draft lands on your desk and a person releases it	The price leaves the building without anyone having seen it
The Record	Every request, reply and refusal is written in order with its reason	You interview the agent afterwards, and it tells you what it thinks it did