Say when the mesh is wrong: conditions, watchdogs, the bus's advisories, doctor (hq to-be 45 Phase 1)

Every one of the 48 core failures of research 031 was found by a person
looking; the mesh's answers carried the fact for whoever asked and told
nobody.

- The condition store (to-be 45 §2): mesh-controller_conditions, one key
  per open condition, written by compare-and-set so a person's silence
  and the watchdogs never lose each other's word; every transition kept
  ninety days in mesh-controller_condition-history and said as the
  seat's events condition-raised / condition-changed / condition-cleared
  (the condition at the top level, with event, at, change, why, show),
  offered again while the bus is away. Raised and cleared by observation
  only; a clearing reopened within ten minutes is the same condition with
  its count up, its silence kept. Verbs: conditions, conditions show,
  conditions silence (a hand act, at most a week), conditions history.
- ADR 0224's provider standing is the first kind, provider-failing, held
  by the provider's events; the provider_standing table is no longer read
  or written (left in place: dropping it is the operator's word).
- status leads with the open conditions, urgent first, and says all well
  only with none open; conditions it cannot read are said and not well.
- The signals table compiled in, one watchdog loop over it every 30s: S1
  heartbeat (3 intervals, asleep machines excepted, control node urgent
  after 30 min), S2 report after a send, S3 plan tier, S4 event loop deaf,
  S5 merge not acted, S6 ask lost, S7 call hung, S8 provider silent, S9
  advisories, S10 self-check silent, S11 node tools silent, S13 stale
  refusals; S12, S14, S15 deferred with their reasons. A row that cannot
  see raises probe-failed and clears nothing. A test generated from the
  table suppresses each signal inside and past its bound.
- The bus's advisories (maximum deliveries, a mesh consumer deleted) and
  the controller's own slow consumer and refused subjects, said in the
  mesh's words.
- doctor: the probe registry D1-D10 (D5 deferred) and DW, every five
  minutes, each in thirty seconds; a probe that cannot run is never a
  pass. D1 validates with mesh-host's own validator. Every run ends with
  the doctor-heartbeat event mesh-watcher listens for.
- The controller is granted its new buckets, events, the two advisories
  and $SRV.INFO; the node tools their tools-alive heartbeat. The streams
  and consumers the controller asserts and the ones D6/D7 expect are one
  derivation.

cmd/mesh-controller/busobjects.go

@@ -0,0 +1,104 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/novox/mesh-controller/internal/broker"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// The streams and durable consumers the mesh's own traffic needs, derived once (novox/hq to-be 45 §4,
+// D6 and D7).
+//
+// **What the controller asserts at its start and what the self-check expects to find are one
+// derivation**, run against the bus to make them and against a recorder to list them. Two lists would
+// drift, and a self-check comparing the bus with a second opinion of what should be there would find
+// the drift rather than the fault.
+
+// assertBusObjects brings every stream and consumer into being on r, and answers the machines that
+// can now hear a declaration.
+func assertBusObjects(ctx context.Context, inv *inventory.Inventory, r broker.Raiser) ([]string, error) {
+	nodes, err := inv.Nodes(ctx)
+	if err != nil {
+		return nil, err
+	}
+	names := make([]string, 0, len(nodes))
+	for _, n := range nodes {
+		names = append(names, n.Name)
+	}
+	if err := broker.Raise(r, names); err != nil {
+		return nil, err
+	}
+	// The work queues of the mesh's own roles (novox/hq ADR 0121). The queue before the holder,
+	// deliberately: work queues until somebody arrives to do it, so assigning a build machine a week
+	// after something started asking for builds flushes the backlog instead of having lost it.
+	// With the seats' holders, so each role's work queue gets the consumer its holder takes
+	// work from. Passed as nil until the first live raise, which left the build machine bound to a
+	// consumer nothing had created (2026-09-28).
+	holders, err := seatHolders(ctx, inv)
+	if err != nil {
+		return nil, err
+	}
+	if err := broker.RaiseSeats(r, inventory.MeshSeats(), holders); err != nil {
+		return nil, err
+	}
+	// And how every module hears what it consumes. Derived from the same records the user list is
+	// composed from, so a module the mesh grants a consumer's subjects has that consumer waiting.
+	// Done on every raise, not only when a credential is issued: every module moved onto this bus
+	// by the rollout was issued on the old one, and came up with nothing to bind to (2026-09-28).
+	consumers, err := moduleConsumers(ctx, inv)
+	if err != nil {
+		return nil, err
+	}
+	for _, c := range consumers {
+		if err := r.EnsureConsumer(c.Consumer); err != nil {
+			return nil, fmt.Errorf("how %s on %s hears what it consumes: %w", c.Module, c.Node, err)
+		}
+	}
+	return names, nil
+}
+
+// moduleConsumers is every module's durable consumer, from the records the user list is composed from.
+func moduleConsumers(ctx context.Context, inv *inventory.Inventory) ([]broker.ModuleConsumer, error) {
+	records, err := inv.BusRecords(ctx)
+	if err != nil {
+		return nil, err
+	}
+	users, err := broker.Users(records)
+	if err != nil {
+		return nil, err
+	}
+	return broker.ConsumersOf(users), nil
+}
+
+// moduleConsumerCount is how many modules hear what they consume, for the raise's one line.
+func moduleConsumerCount(ctx context.Context, inv *inventory.Inventory) (int, error) {
+	consumers, err := moduleConsumers(ctx, inv)
+	return len(consumers), err
+}
+
+// expectedBusObjects is every stream and consumer assertBusObjects would make, made nowhere.
+func expectedBusObjects(ctx context.Context, inv *inventory.Inventory) ([]broker.Stream, []broker.Consumer, error) {
+	var rec recordingRaiser
+	if _, err := assertBusObjects(ctx, inv, &rec); err != nil {
+		return nil, nil, fmt.Errorf("what the bus should hold cannot be worked out: %w", err)
+	}
+	return rec.streams, rec.consumers, nil
+}
+
+// recordingRaiser keeps what it was asked to assert and asserts nothing.
+type recordingRaiser struct {
+	streams   []broker.Stream
+	consumers []broker.Consumer
+}
+
+func (r *recordingRaiser) EnsureStream(s broker.Stream) error {
+	r.streams = append(r.streams, s)
+	return nil
+}
+
+func (r *recordingRaiser) EnsureConsumer(c broker.Consumer) error {
+	r.consumers = append(r.consumers, c)
+	return nil
+}