Let the TypeScript mesh client take every role's tools from the console on its machine, so it asks the controller for none (issue 1955, ADR 0571 clause 5)

The Go console answers mesh/seats beside MCP's methods from mesh-sdk's seat
definitions and placement's seat-holders. The console test that runs bundles
expects the unread seat-holders line beside ghost.

node-tools/internal/console/mcp.go

@@ -6,6 +6,8 @@ package console
 import (
 	"context"
 	"encoding/json"
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	"git.novox.be/novox/mesh-sdk/go/delivery"
 	"os"
 	"strings"
 	"sync"
@@ -60,6 +62,34 @@ type Surface struct {
 	Flat bool
 }
 
+// MethodSeats is the console's JSON-RPC method beside MCP's that answers every seat's verbs and holders, in the shape
+// the controller's `tools` answered: `{seats: [{seat, scope, tools: [{name, description, input, replaces}], holders:
+// [{module, node}]}], holders_why}`.
+const MethodSeats = "mesh/seats"
+
+// seatsAnswer is MethodSeats' answer: mesh-sdk's seat definitions, with each seat's holders by placement.
+func (s *Surface) seatsAnswer() map[string]any {
+	placed, err := seatHoldersOn(s.conn)
+	x := &index{Placed: placed}
+	seats := []map[string]any{}
+	for _, st := range catalogue.DefaultSeats() {
+		holders := x.placedHolders(st.Name, "")
+		if holders == nil {
+			holders = []delivery.SeatHolder{}
+		}
+		tools := st.Serves
+		if tools == nil {
+			tools = []catalogue.Verb{}
+		}
+		seats = append(seats, map[string]any{"seat": st.Name, "scope": st.Scope, "tools": tools, "holders": holders})
+	}
+	out := map[string]any{"seats": seats}
+	if err != nil {
+		out["holders_why"] = "who holds which seat by placement could not be read: " + err.Error()
+	}
+	return out
+}
+
 // NewSurface is the surface over a connection, as `who`.
 func NewSurface(conn *bus.Conn, who string) *Surface {
 	return &Surface{conn: conn, who: who, Flat: os.Getenv("MESH_CONSOLE_FLAT") == "1"}
@@ -125,6 +155,11 @@ func (s *Surface) HandleContext(ctx context.Context, r Request) *Reply {
 			return nil
 		}
 		return answer(r.ID, map[string]any{})
+	case MethodSeats:
+		// The seats' contract and who holds each, for a client on this machine that has no seat definitions of its own
+		// (the TypeScript `mesh`): read in-process from mesh-sdk and from placement, never asked of the controller
+		// (novox/hq ADR 0571 clauses 4 and 5).
+		return answer(r.ID, s.seatsAnswer())
 	case "tools/list":
 		if !s.Flat {
 			return answer(r.ID, map[string]any{"tools": discovery()})