From 84a7639042a74d7cbc9085f6f6515896b538c506 Mon Sep 17 00:00:00 2001
From: jochen <jschoubben@gmail.com>
Date: Thu, 5 Nov 2026 15:52:59 +0100
Subject: [PATCH] =?UTF-8?q?mesh-config=20reads=20the=20placement,=20wants,?=
 =?UTF-8?q?=20haves,=20modules,=20manifests,=20predefined=20list=20and=20c?=
 =?UTF-8?q?onfig=20candidates=20through=20the=20seats'=20types=20and=20cli?=
 =?UTF-8?q?ents,=20the=20builder's=20builds=20through=20its=20published=20?=
 =?UTF-8?q?package;=20the=20kept=20value=20is=20its=20own=20layout=20(B5f;?=
 =?UTF-8?q?=20ADR=200634=20=C2=A71,=20=C2=A74;=20issue=201966)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i
---
 .../cmd/mesh-config/config_test.go            | 25 ++++++++------
 .../mesh-config/cmd/mesh-config/delivery.go   | 10 +++---
 .../cmd/mesh-config/manifest_test.go          | 15 +++++---
 .../mesh-config/cmd/mesh-config/ownerviews.go | 14 ++++----
 modules/mesh-config/cmd/mesh-config/pulls.go  | 31 +++++++++++------
 .../mesh-config/cmd/mesh-config/readers.go    | 23 +++++++++++++
 .../mesh-config/cmd/mesh-config/resolve.go    | 15 ++++----
 .../mesh-config/cmd/mesh-config/sources.go    | 19 ++++++-----
 .../mesh-config/cmd/mesh-config/takeover.go   | 33 ++++++++++++------
 .../cmd/mesh-config/takeover_test.go          |  9 +++--
 .../cmd/mesh-config/whole_integration_test.go | 34 ++++++++++++-------
 modules/mesh-config/go.mod                    |  7 ++++
 modules/mesh-config/module.json               |  3 ++
 13 files changed, 156 insertions(+), 82 deletions(-)
 create mode 100644 modules/mesh-config/cmd/mesh-config/readers.go

diff --git a/modules/mesh-config/cmd/mesh-config/config_test.go b/modules/mesh-config/cmd/mesh-config/config_test.go
index 9888a750c..12e0a438f 100644
--- a/modules/mesh-config/cmd/mesh-config/config_test.go
+++ b/modules/mesh-config/cmd/mesh-config/config_test.go
@@ -4,13 +4,16 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	assignerclient "git.novox.be/novox/mesh-contracts/placement/go/clients/meshmoduleassignerclient"
+	meshseat "git.novox.be/novox/mesh-contracts/placement/go/seats/meshmoduleassigner"
+	catalogclient "git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
+	builds "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
 	"sort"
 	"strings"
 	"sync"
 	"testing"
 	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // memStore is the bus as mesh-config reaches it, in memory: its states and the mirrors it reads, its history log,
@@ -167,36 +170,36 @@ func (m *memStore) place(t *testing.T, node, module string, on bool) {
 		e, _ := m.Get(PlacementRead, k)
 		keys[k] = e.Value
 	}
-	all, err := delivery.PlacementsOf(keys)
+	all, err := assignerclient.PlacementsOf(keys)
 	if err != nil {
 		t.Fatal(err)
 	}
 	p := all[node]
 	p.Node = node
-	var kept []delivery.PlacedModule
+	var kept []meshseat.PlacedModule
 	for _, x := range p.Modules {
 		if x.Module != module {
 			kept = append(kept, x)
 		}
 	}
 	if on {
-		kept = append(kept, delivery.PlacedModule{Module: module})
+		kept = append(kept, meshseat.PlacedModule{Module: module})
 	}
 	p.Modules = kept
 	for _, k := range m.keysOf(PlacementRead) {
-		if n, _, _, err := delivery.ParsePlacementKey(k); err == nil && n == node {
+		if n, _, _, err := assignerclient.ParseKey(k); err == nil && n == node {
 			_ = m.Delete(PlacementRead, k)
 		}
 	}
 	if node == "ace" {
-		raw, err := delivery.EncodePlacement(p)
+		raw, err := assignerclient.EncodePlacement(p)
 		if err != nil {
 			t.Fatal(err)
 		}
 		_ = m.Put(PlacementRead, "placement.ace", json.RawMessage(raw))
 		return
 	}
-	values, err := delivery.PlacementValues(p)
+	values, err := assignerclient.PlacementValues(p)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -218,8 +221,8 @@ func (m *memStore) manifest(t *testing.T, module, raw string) string {
 	if !json.Valid([]byte(raw)) {
 		t.Fatalf("not JSON: %s", raw)
 	}
-	digest := delivery.ManifestDigest([]byte(raw))
-	value, err := delivery.EncodeManifest(delivery.Manifest{Module: module, JSON: raw})
+	digest := catalogclient.ManifestDigest([]byte(raw))
+	value, err := catalogclient.EncodeManifest(catalog.ManifestsByDigestValue{Module: module, Manifest: raw})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -239,7 +242,7 @@ func (m *memStore) declare(t *testing.T, module, raw string) {
 func (m *memStore) want(t *testing.T, node, module, fp, raw string) {
 	t.Helper()
 	digest := m.manifest(t, module, raw)
-	key, err := delivery.BuilderBuildKey(module, fp)
+	key, err := builds.BuilderBuildKey(module, fp)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/modules/mesh-config/cmd/mesh-config/delivery.go b/modules/mesh-config/cmd/mesh-config/delivery.go
index 8da6f8b7e..9aa2b9bc0 100644
--- a/modules/mesh-config/cmd/mesh-config/delivery.go
+++ b/modules/mesh-config/cmd/mesh-config/delivery.go
@@ -6,10 +6,10 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	engineclient "git.novox.be/novox/mesh-contracts/go/clients/nodeengineclient"
 	"strings"
 
 	"git.novox.be/novox/mesh-contracts/health-and-repair/go/clients/meshhandactsclient"
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // The addresses asked.
@@ -46,7 +46,7 @@ func (d toolDelivery) Have(node, module string) (string, bool, error) {
 	if err := json.Unmarshal(answer, &kept); err != nil {
 		return "", false, fmt.Errorf("node_haves answered what is not its listing: %s", output)
 	}
-	key, err := delivery.HaveKey(node, module)
+	key, err := engineclient.HaveKey(node, module)
 	if err != nil {
 		return "", false, err
 	}
@@ -54,11 +54,11 @@ func (d toolDelivery) Have(node, module string) (string, bool, error) {
 	if !ok {
 		return "", false, nil
 	}
-	var h delivery.Have
-	if err := json.Unmarshal(have, &h); err != nil {
+	h, err := engineclient.DecodeHave(have)
+	if err != nil {
 		return "", false, fmt.Errorf("the have of %s on %s is not readable: %w", module, node, err)
 	}
-	return h.FP, true, nil
+	return h.Fp, true, nil
 }
 
 // Reads asks a node's node-engine what it reads; an answer means it states it.
diff --git a/modules/mesh-config/cmd/mesh-config/manifest_test.go b/modules/mesh-config/cmd/mesh-config/manifest_test.go
index 0c14a2267..0950206f0 100644
--- a/modules/mesh-config/cmd/mesh-config/manifest_test.go
+++ b/modules/mesh-config/cmd/mesh-config/manifest_test.go
@@ -19,11 +19,12 @@ func TestEveryStateAndActHasItsTool(t *testing.T) {
 		t.Fatal(err)
 	}
 	var m struct {
-		State  []string `json:"state"`
-		Logs   []string `json:"logs"`
-		Reads  []string `json:"reads"`
-		Tools  []string `json:"tools"`
-		Claims []struct {
+		State    []string          `json:"state"`
+		Packages map[string]string `json:"packages"`
+		Logs     []string          `json:"logs"`
+		Reads    []string          `json:"reads"`
+		Tools    []string          `json:"tools"`
+		Claims   []struct {
 			Name   string   `json:"name"`
 			Serves []string `json:"serves"`
 		} `json:"claims"`
@@ -31,6 +32,10 @@ func TestEveryStateAndActHasItsTool(t *testing.T) {
 	if err := json.Unmarshal(raw, &m); err != nil {
 		t.Fatal(err)
 	}
+	// The builder's keys are read through its published package, taken by its series (ADR 0634 §1).
+	if m.Packages["builds"] != "0.1" {
+		t.Errorf("packages %v: want builds of series 0.1", m.Packages)
+	}
 	via := map[string]string{
 		ValuesState: "config list", ResolvedState: "config list", PredefinedState: "config list",
 		ProposalsState: "config proposals", PullsState: "config list", KeptState: "config list", HistoryLog: "config history",
diff --git a/modules/mesh-config/cmd/mesh-config/ownerviews.go b/modules/mesh-config/cmd/mesh-config/ownerviews.go
index f220d52a9..1c1988279 100644
--- a/modules/mesh-config/cmd/mesh-config/ownerviews.go
+++ b/modules/mesh-config/cmd/mesh-config/ownerviews.go
@@ -15,12 +15,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
 	"sort"
 	"strings"
 	"time"
 
 	stdio "git.novox.be/novox/mesh-sdk/go"
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 
 	"git.novox.be/novox/mesh-sdk/go/views"
 )
@@ -41,12 +41,12 @@ const (
 // followed is each state read through its owner: the `<owner>.<state>` name this module's code uses, the owner, its
 // state and its tool.
 var followed = []struct{ Read, Owner, State, Tool string }{
-	{ModulesRead, delivery.IndexerModule, "modules", IndexerModulesTool},
-	{ManifestsRead, delivery.IndexerModule, "manifests", IndexerManifestsTool},
-	{IndexerPredefinedRead, delivery.IndexerModule, delivery.IndexerPredefinedState, IndexerPredefTool},
-	{CandidatesRead, delivery.IndexerModule, delivery.IndexerConfigCandidatesState, IndexerCandidatesTool},
-	{PlacementRead, delivery.AssignerModule, "placement", AssignerPlacementTool},
-	{WantsRead, delivery.AssignerModule, "wants", AssignerWantsTool},
+	{ModulesRead, indexerModule, "modules", IndexerModulesTool},
+	{ManifestsRead, indexerModule, "manifests", IndexerManifestsTool},
+	{IndexerPredefinedRead, indexerModule, catalog.StatePredefined, IndexerPredefTool},
+	{CandidatesRead, indexerModule, catalog.StateConfigCandidates, IndexerCandidatesTool},
+	{PlacementRead, assignerModule, "placement", AssignerPlacementTool},
+	{WantsRead, assignerModule, "wants", AssignerWantsTool},
 }
 
 // ownerViews are the pictures, by the read name.
diff --git a/modules/mesh-config/cmd/mesh-config/pulls.go b/modules/mesh-config/cmd/mesh-config/pulls.go
index 22849bd89..283d99270 100644
--- a/modules/mesh-config/cmd/mesh-config/pulls.go
+++ b/modules/mesh-config/cmd/mesh-config/pulls.go
@@ -10,8 +10,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // A config value held for the open pull request that introduces its key (novox/hq ADR 0502, issue 1826).
@@ -63,16 +61,29 @@ type PullDecl struct {
 	At       time.Time                         `json:"at"`
 }
 
-// KeptValue is an approved held value, kept apart from the values mesh-config resolves: mesh-sdk's layout, which the
-// checker and the assigner's composition check read (novox/hq ADR 0565 §5).
-type KeptValue = delivery.KeptValue
+// KeptValue is an approved held value, kept apart from the values mesh-config resolves, in this module's own layout
+// (the owner's: its state `kept`), which the checker and the assigner's composition check read (novox/hq ADR 0565 §5).
+type KeptValue struct {
+	Pull   string `json:"pull"`
+	Head   string `json:"head"`
+	Digest string `json:"declaration"`
+	Node   string `json:"node"`
+	Module string `json:"module"`
+	Key    string `json:"key"`
+	// Value is the value held, as the operator approved it.
+	Value json.RawMessage `json:"value"`
+	By    string          `json:"by"`
+	Via   string          `json:"via"`
+	Why   string          `json:"why"`
+	// Approved is who approved it, as the proposal kept it.
+	Approved string    `json:"approved"`
+	Proposal string    `json:"proposal"`
+	At       time.Time `json:"at"`
+}
 
-// keptKey is a held value's key in `kept` (delivery.HeldValueKey), the pull request's key form kept for one that is
-// not one.
+// keptKey is a held value's key in `kept`: the pull request's key form (pullKey), the node, the module and the config
+// key, joined by dots.
 func keptKey(pull, node, module, key string) string {
-	if k, err := delivery.HeldValueKey(pull, node, module, key); err == nil {
-		return k
-	}
 	return pullKey(pull) + "." + node + "." + module + "." + key
 }
 
diff --git a/modules/mesh-config/cmd/mesh-config/readers.go b/modules/mesh-config/cmd/mesh-config/readers.go
new file mode 100644
index 000000000..328303a45
--- /dev/null
+++ b/modules/mesh-config/cmd/mesh-config/readers.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	meshwants "git.novox.be/novox/mesh-contracts/placement/go/seats/meshwants"
+)
+
+// The holders whose states this module reads, one constant each (a reader names its holder once; ADR 0634 §4).
+const (
+	assignerModule = "mesh-delivery-assigner"
+	indexerModule  = "mesh-delivery-indexer"
+)
+
+// parseWantKey reads a want's key, `want.<node>.<module>`; the want of a node's own and a held fingerprint's key are
+// not one.
+func parseWantKey(key string) (node, module string, err error) {
+	node, module, ok := meshwants.ParseWantsByWantNodeModuleKey(key)
+	if !ok {
+		return "", "", fmt.Errorf("%q is not the key of a module's want on a node", key)
+	}
+	return node, module, nil
+}
diff --git a/modules/mesh-config/cmd/mesh-config/resolve.go b/modules/mesh-config/cmd/mesh-config/resolve.go
index bc00f098c..8d9ef1e60 100644
--- a/modules/mesh-config/cmd/mesh-config/resolve.go
+++ b/modules/mesh-config/cmd/mesh-config/resolve.go
@@ -3,11 +3,12 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	meshseat "git.novox.be/novox/mesh-contracts/placement/go/seats/meshmoduleassigner"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
+	builds "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
 	"sort"
 	"strings"
 	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // The four sources (novox/hq ADR 0348 §2, §3, §9): a module's value on a node resolves, the most specific winning,
@@ -25,15 +26,15 @@ const (
 	// PlacementRead is the seat mesh-module-assigner's state, held by the assigner (novox/hq ADR 0567 §1, §8): each
 	// node's key `placement.<node>` with the modules placed there. It is the one source of which module runs where
 	// (issue 1953): the controller's assignments are no longer read.
-	PlacementRead = delivery.PlacementRead
+	PlacementRead = (assignerModule + "." + meshseat.StatePlacement)
 	// WantsRead is the assigner's wants, `want.<node>.<module>`: the build each node is to run (ADR 0539 §1).
-	WantsRead = delivery.AssignerModule + ".wants"
+	WantsRead = assignerModule + ".wants"
 	// BuildsRead is the builder's builds, `<module>.<fingerprint hex>`: each build's manifest digest (ADR 0525).
-	BuildsRead = delivery.BuilderModule + ".builds"
+	BuildsRead = builds.BuilderModule + ".builds"
 	// ModulesRead is the indexer's modules, `<module>`: the trunk's manifest digest of each module, from whichever
 	// repository holds it (ADR 0437 §5, ADR 0478 §9); ManifestsRead its manifests by digest (ADR 0429 §16).
-	ModulesRead   = delivery.IndexerModule + ".modules"
-	ManifestsRead = delivery.IndexerModule + ".manifests"
+	ModulesRead   = indexerModule + "." + catalog.StateModules
+	ManifestsRead = indexerModule + "." + catalog.StateManifests
 
 	// HistoryLog is the log of every set and clear, with the proven caller and why (ADR 0348 §9).
 	HistoryLog = "history"
diff --git a/modules/mesh-config/cmd/mesh-config/sources.go b/modules/mesh-config/cmd/mesh-config/sources.go
index c70c04001..a7feae520 100644
--- a/modules/mesh-config/cmd/mesh-config/sources.go
+++ b/modules/mesh-config/cmd/mesh-config/sources.go
@@ -4,10 +4,11 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	assignerclient "git.novox.be/novox/mesh-contracts/placement/go/clients/meshmoduleassignerclient"
+	catalogclient "git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient"
+	builds "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
 	"sort"
 	"strings"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // Reading the sources, writing the resolved values, and publishing the list of predefined keys.
@@ -64,7 +65,7 @@ func (c *Config) sources() (Sources, error) {
 }
 
 // readPlacement is every module the seat mesh-module-assigner places on a node (ADR 0567 §1, §9), from the state's keys in
-// either form: a node key and its module keys, or the form before, `placement.<node>` (delivery.PlacementsOf;
+// either form: a node key and its module keys, or the form before, `placement.<node>` (assignerclient.PlacementsOf;
 // research 072 row 37). By node in name order, each node's modules in the order its placement names them.
 func (c *Config) readPlacement(s *Sources) error {
 	keys := map[string][]byte{}
@@ -74,7 +75,7 @@ func (c *Config) readPlacement(s *Sources) error {
 	}); err != nil {
 		return err
 	}
-	placements, err := delivery.PlacementsOf(keys)
+	placements, err := assignerclient.PlacementsOf(keys)
 	if err != nil {
 		return fmt.Errorf("the placement is not read whole: %w", err)
 	}
@@ -84,7 +85,7 @@ func (c *Config) readPlacement(s *Sources) error {
 	}
 	sort.Strings(nodes)
 	for _, node := range nodes {
-		for _, module := range placements[node].Assigned() {
+		for _, module := range assignerclient.Assigned(placements[node]) {
 			s.Assignments = append(s.Assignments, Assignment{Node: node, Module: module})
 		}
 	}
@@ -100,7 +101,7 @@ func (c *Config) readPlacement(s *Sources) error {
 func (c *Config) readDeclarations(s *Sources) error {
 	wanted := map[string]string{} // <node>.<module> → the fingerprint its want names
 	if err := c.each(WantsRead, func(key string, raw []byte) error {
-		node, module, err := delivery.ParseWantKey(key)
+		node, module, err := parseWantKey(key)
 		if err != nil {
 			return nil // a held key or a node's own want
 		}
@@ -188,7 +189,7 @@ func modulesOf(as []Assignment) []string {
 
 // trunkDeclarations is a module's declarations at the trunk: the manifest the indexer's `modules.<module>` names.
 func (c *Config) trunkDeclarations(module string) (ModuleDeclarations, error) {
-	key, err := delivery.ModulesKey(module)
+	key, err := catalogclient.ModulesKey(module)
 	if err != nil {
 		return ModuleDeclarations{}, err
 	}
@@ -210,7 +211,7 @@ func (c *Config) trunkDeclarations(module string) (ModuleDeclarations, error) {
 
 // builtDeclarations is a module's declarations at a build: the manifest the builder's done key names.
 func (c *Config) builtDeclarations(module, fp string) (ModuleDeclarations, error) {
-	key, err := delivery.BuilderBuildKey(module, fp)
+	key, err := builds.BuilderBuildKey(module, fp)
 	if err != nil {
 		return ModuleDeclarations{}, err
 	}
@@ -239,7 +240,7 @@ func (c *Config) manifestDeclarations(module, digest string) (ModuleDeclarations
 	if ok {
 		return d, nil
 	}
-	key, err := delivery.ManifestsKey(digest)
+	key, err := catalogclient.ManifestsKey(digest)
 	if err != nil {
 		return ModuleDeclarations{}, err
 	}
diff --git a/modules/mesh-config/cmd/mesh-config/takeover.go b/modules/mesh-config/cmd/mesh-config/takeover.go
index 26ca344bb..c616b929b 100644
--- a/modules/mesh-config/cmd/mesh-config/takeover.go
+++ b/modules/mesh-config/cmd/mesh-config/takeover.go
@@ -13,8 +13,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
+	catalogclient "git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
+	"time"
 )
 
 // The states and reads.
@@ -23,8 +24,8 @@ const (
 	DeclaredState = "declared"
 
 	// IndexerPredefinedRead and CandidatesRead are the indexer's states (ADR 0565 §2).
-	IndexerPredefinedRead = delivery.IndexerModule + "." + delivery.IndexerPredefinedState
-	CandidatesRead        = delivery.IndexerModule + "." + delivery.IndexerConfigCandidatesState
+	IndexerPredefinedRead = indexerModule + "." + catalog.StatePredefined
+	CandidatesRead        = indexerModule + "." + catalog.StateConfigCandidates
 )
 
 // SourceIndexer is the one source of a pull request's config and of the predefined list: the indexer's.
@@ -54,7 +55,7 @@ type DeclaredKept struct {
 
 // trunkKept is a module's declarations at the trunk with the manifest they come from.
 func (c *Config) trunkKept(module string) (DeclaredKept, error) {
-	key, err := delivery.ModulesKey(module)
+	key, err := catalogclient.ModulesKey(module)
 	if err != nil {
 		return DeclaredKept{}, err
 	}
@@ -119,16 +120,20 @@ func (c *Config) writeDeclared(s Sources) ([]string, error) {
 
 // indexerList is the indexer's predefined list as the mirror's list holds one: the keys, and the commit.
 func (c *Config) indexerList() (PredefinedList, bool, error) {
-	e, err := c.Store.Get(IndexerPredefinedRead, delivery.PredefinedListKey)
+	e, err := c.Store.Get(IndexerPredefinedRead, catalog.PredefinedByListKey())
 	if err != nil || e == nil {
 		return PredefinedList{}, false, err
 	}
-	var kept delivery.PredefinedKept
+	var kept catalog.PredefinedByListValue
 	if err := json.Unmarshal(e.Value, &kept); err != nil {
 		return PredefinedList{}, false, fmt.Errorf("the indexer's predefined list is not one: %w", err)
 	}
 	list := PredefinedList{Keys: map[string]PredefinedKey{}, Commit: kept.Commit}
-	if err := json.Unmarshal(kept.List, &list.Keys); err != nil {
+	listed, err := json.Marshal(kept.List)
+	if err == nil {
+		err = json.Unmarshal(listed, &list.Keys)
+	}
+	if err != nil {
 		return PredefinedList{}, false, fmt.Errorf("the indexer's predefined list is not predefined.json: %w", err)
 	}
 	return list, true, nil
@@ -138,11 +143,11 @@ func (c *Config) indexerList() (PredefinedList, bool, error) {
 func (c *Config) candidates() (map[string]PullDecl, error) {
 	out := map[string]PullDecl{}
 	err := c.each(CandidatesRead, func(key string, raw []byte) error {
-		var cand delivery.ConfigCandidate
+		var cand catalog.ConfigCandidatesByPullValue
 		if err := json.Unmarshal(raw, &cand); err != nil || cand.Pull == "" {
 			return fmt.Errorf("the indexer's config candidate %s is not one", key)
 		}
-		p := PullDecl{Pull: cand.Pull, Head: cand.Head, Declares: map[string]map[string]Declaration{}, At: cand.At}
+		p := PullDecl{Pull: cand.Pull, Head: cand.Head, Declares: map[string]map[string]Declaration{}, At: timeOf(cand.At)}
 		for module, keys := range cand.Declares {
 			raw, _ := json.Marshal(keys)
 			var d map[string]Declaration
@@ -242,3 +247,11 @@ func (c *Config) Resync() (any, error) {
 	}
 	return out, nil
 }
+
+// timeOf is an optional time of a seat's value as a time, the zero time when it is absent.
+func timeOf(t *time.Time) time.Time {
+	if t == nil {
+		return time.Time{}
+	}
+	return *t
+}
diff --git a/modules/mesh-config/cmd/mesh-config/takeover_test.go b/modules/mesh-config/cmd/mesh-config/takeover_test.go
index f0c0bbad0..223488219 100644
--- a/modules/mesh-config/cmd/mesh-config/takeover_test.go
+++ b/modules/mesh-config/cmd/mesh-config/takeover_test.go
@@ -2,10 +2,9 @@ package main
 
 import (
 	"encoding/json"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
 	"strings"
 	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // The trunk's manifests aMesh declares.
@@ -30,14 +29,14 @@ func anAgreeingMesh(t *testing.T) (*Config, *memStore, *standIn) {
 // indexerList is the indexer's `predefined.list` at a commit.
 func indexerList(t *testing.T, m *memStore, commit, list string) {
 	t.Helper()
-	raw, _ := json.Marshal(delivery.PredefinedKept{V: 1, Commit: commit, List: json.RawMessage(list)})
-	m.mirror(t, IndexerPredefinedRead, delivery.PredefinedListKey, string(raw))
+	raw, _ := json.Marshal(catalog.PredefinedByListValue{V: 1, Commit: commit, List: json.RawMessage(list)})
+	m.mirror(t, IndexerPredefinedRead, catalog.PredefinedByListKey(), string(raw))
 }
 
 // candidate is the indexer's config candidate of a pull request.
 func candidate(t *testing.T, m *memStore, pull, head, declares string) {
 	t.Helper()
-	key, err := delivery.ConfigCandidateKey(pull)
+	key, err := catalog.ConfigCandidatesByPullKey(pullKey(pull)), error(nil)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/modules/mesh-config/cmd/mesh-config/whole_integration_test.go b/modules/mesh-config/cmd/mesh-config/whole_integration_test.go
index 9b29419bf..c7ebe4c72 100644
--- a/modules/mesh-config/cmd/mesh-config/whole_integration_test.go
+++ b/modules/mesh-config/cmd/mesh-config/whole_integration_test.go
@@ -18,6 +18,13 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	engineclient "git.novox.be/novox/mesh-contracts/go/clients/nodeengineclient"
+	nodeengine "git.novox.be/novox/mesh-contracts/go/seats/nodeengine"
+	assignerclient "git.novox.be/novox/mesh-contracts/placement/go/clients/meshmoduleassignerclient"
+	meshseat "git.novox.be/novox/mesh-contracts/placement/go/seats/meshmoduleassigner"
+	catalogclient "git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient"
+	catalog "git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog"
+	builds "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
 	"io"
 	"os"
 	"os/exec"
@@ -35,7 +42,6 @@ import (
 	meshconditions "git.novox.be/novox/mesh-contracts/health-and-repair/go/seats/meshconditions"
 	oc "git.novox.be/novox/mesh-contracts/operator-and-conversation/go/seats/operatorchannel"
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"git.novox.be/novox/mesh-sdk/go/delivery"
 	"git.novox.be/novox/mesh-sdk/go/process"
 	"git.novox.be/novox/mesh-sdk/go/testbus"
 	"git.novox.be/novox/mesh-sdk/go/views"
@@ -361,10 +367,10 @@ func (p *player) asked(key string, body json.RawMessage) any {
 	case key == HavesAsk:
 		var q struct{ Node, Module string }
 		_ = json.Unmarshal(body, &q)
-		hk, _ := delivery.HaveKey(q.Node, q.Module)
+		hk, _ := engineclient.HaveKey(q.Node, q.Module)
 		keys := map[string]any{}
 		if fp, ok := p.haves[q.Node+"."+q.Module]; ok {
-			keys[hk] = delivery.Have{V: delivery.Version, FP: fp, Phase: "applied", Health: "healthy"}
+			keys[hk] = nodeengine.HaveByNodeModuleValue{V: 1, Fp: fp, Phase: "running", Health: "ok"}
 		}
 		return map[string]any{"keys": keys}
 	case strings.HasPrefix(key, ManifestReadsAsk):
@@ -562,8 +568,8 @@ func eventually(t *testing.T, what string, ok func() bool) {
 // manifestIn writes a module's manifest into the indexer's buckets as the indexer writes it, and names it as the trunk's.
 func (p *player) manifestIn(module, raw string) string {
 	p.t.Helper()
-	digest := delivery.ManifestDigest([]byte(raw))
-	value, err := delivery.EncodeManifest(delivery.Manifest{Module: module, JSON: raw})
+	digest := catalogclient.ManifestDigest([]byte(raw))
+	value, err := catalogclient.EncodeManifest(catalog.ManifestsByDigestValue{Module: module, Manifest: raw})
 	if err != nil {
 		p.t.Fatal(err)
 	}
@@ -575,26 +581,28 @@ func (p *player) manifestIn(module, raw string) string {
 // buildIn writes a build of a module with a manifest, and the want that names it on a node.
 func (p *player) buildIn(node, module, fp, raw string) {
 	p.t.Helper()
-	digest := delivery.ManifestDigest([]byte(raw))
-	value, _ := delivery.EncodeManifest(delivery.Manifest{Module: module, JSON: raw})
+	digest := catalogclient.ManifestDigest([]byte(raw))
+	value, _ := catalogclient.EncodeManifest(catalog.ManifestsByDigestValue{Module: module, Manifest: raw})
 	p.put("mesh-delivery-indexer.manifests", digest, json.RawMessage(value))
-	bk, _ := delivery.BuilderBuildKey(module, fp)
+	bk, _ := builds.BuilderBuildKey(module, fp)
 	p.put("mesh-delivery-builder.builds", bk, map[string]any{"v": 1, "state": "done", "manifest": digest})
 	p.put("mesh-delivery-assigner.wants", "want."+node+"."+module, map[string]any{"v": 1, "fp": fp, "self": true})
 }
 
 func (p *player) placed(node string, modules ...string) {
 	p.t.Helper()
-	pl := delivery.Placement{V: delivery.Version, Node: node}
+	pl := meshseat.Placement{V: 1, Node: node}
 	for _, m := range modules {
-		pl.Modules = append(pl.Modules, delivery.PlacedModule{Module: m})
+		pl.Modules = append(pl.Modules, meshseat.PlacedModule{Module: m})
 	}
-	values, err := delivery.PlacementValues(pl)
+	// In the order the seat's holder writes them (module keys before the node key that names their digests), so a reader
+	// never holds a node key whose module keys have not arrived.
+	writes, err := assignerclient.NewKeys().Writes(pl.Node, &pl)
 	if err != nil {
 		p.t.Fatal(err)
 	}
-	for k, raw := range values {
-		p.put("mesh-delivery-assigner.placement", k, json.RawMessage(raw))
+	for _, w := range writes {
+		p.put("mesh-delivery-assigner.placement", w.Key, json.RawMessage(w.Value))
 	}
 }
 
diff --git a/modules/mesh-config/go.mod b/modules/mesh-config/go.mod
index f27f531c8..cb405a36a 100644
--- a/modules/mesh-config/go.mod
+++ b/modules/mesh-config/go.mod
@@ -3,6 +3,13 @@ module mesh-config
 go 1.26.0
 
 require (
+	git.novox.be/novox/mesh-contracts/placement/go/seats/meshwants v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-contracts/go/clients/nodeengineclient v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-delivery/contracts/go/seats/meshcatalog v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-contracts/placement/go/clients/meshmoduleassignerclient v0.0.0-00010101000000-000000000000
+	git.novox.be/novox/mesh-contracts/placement/go/seats/meshmoduleassigner v0.0.0-00010101000000-000000000000
 	git.novox.be/novox/mesh-contracts/health-and-repair/go/seats/meshconditions v0.0.0-00010101000000-000000000000
 	git.novox.be/novox/mesh-contracts/health-and-repair/go/clients/meshconditionsclient v0.0.0-00010101000000-000000000000
 	git.novox.be/novox/mesh-contracts/health-and-repair/go/clients/meshhandactsclient v0.0.0-00010101000000-000000000000
diff --git a/modules/mesh-config/module.json b/modules/mesh-config/module.json
index 71f027224..c92985611 100644
--- a/modules/mesh-config/module.json
+++ b/modules/mesh-config/module.json
@@ -1,6 +1,9 @@
 {
   "module": "mesh-config",
   "version": "1",
+  "packages": {
+    "builds": "0.1"
+  },
   "runs-as": "mesh-config",
   "claims": [
     {