cmd/mesh-controller/seats_test.go

@@ -93,3 +93,27 @@ func TestTheSeatsListingShowsEachSeatsPaths(t *testing.T) {
 		}
 	}
 }
+
+// 1718/AC2: a manifest claiming node-files that serves upload and download passes the controller's module
+// check, judged by the mesh-sdk it vendors; a verb outside the contract is still refused.
+func TestAFilesHolderServingUploadAndDownloadCanHoldTheSeat(t *testing.T) {
+	seat, ok := catalogue.SeatNamed(catalogue.FilesSeat)
+	if !ok {
+		t.Fatal("node-files is not a seat")
+	}
+	serves := []string{"upload", "download"}
+	for _, v := range seat.Serves {
+		if v.Name != "upload" && v.Name != "download" {
+			serves = append(serves, v.Name)
+		}
+	}
+	holder := catalogue.Manifest{Module: "mesh-files", Version: "1", Claims: []catalogue.Claim{{
+		Name: catalogue.FilesSeat, Scope: catalogue.ScopeNode, Serves: serves}}}
+	if err := catalogue.CanHold(holder, seat); err != nil { // 1718/AC2
+		t.Fatalf("a holder serving upload and download is refused: %v", err)
+	}
+	holder.Claims[0].Serves = append(append([]string{}, serves...), "teleport")
+	if err := catalogue.CanHold(holder, seat); err == nil || !strings.Contains(err.Error(), "does not promise") {
+		t.Fatalf("a verb outside the contract must be refused with 'does not promise': %v", err)
+	}
+}

go.mod

@@ -3,7 +3,7 @@ module github.com/novox/mesh-controller
 go 1.26.0
 
 require (
-	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021093645-465beb4ea5e3
+	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021132116-90b20f5a3bda
 	github.com/jackc/pgx/v5 v5.10.0
 	github.com/nats-io/nats-server/v2 v2.11.17
 	github.com/nats-io/nats.go v1.54.0

go.sum

@@ -1,7 +1,7 @@
 git.novox.be/novox/mesh-host v0.0.0-20261018171808-9d9e3a46c4f5 h1:E5stfIeCN6uYgA9TCv+4K8JgaURg3zQppvUgJLaDMP4=
 git.novox.be/novox/mesh-host v0.0.0-20261018171808-9d9e3a46c4f5/go.mod h1:4wyoCr6IIIIarEUuROThWDj7DAvJvIidqMjWcpSnOwE=
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021093645-465beb4ea5e3 h1:OKxU64kHN1yQ/GOa6LwoUwVmiQ74d83WMSZJRFPVm9c=
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021093645-465beb4ea5e3/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021132116-90b20f5a3bda h1:i1n7nr8fZ0f7qnPYnrhHO1yc7FSyrkT8a61/ac5WuW0=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021132116-90b20f5a3bda/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op h1:Z/MZK75wC/NSrkgqeNIa7jexam9uWzhLmFTSCPI/kn0=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op/go.mod h1:FQyySiasQQM8735Ddel3MRojmy4dA1IqCeyJ5jmPMbI=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

testdata/beside/CAPTURED

@@ -9,7 +9,7 @@ a second place to clean besides the catalogue itself.
 
 mesh-catalog  e0bc919d4945bb5f13f971f74643a0b714cf45da  modules/*/module.json, modules/nats/Dockerfile
 mesh-host     9d9e3a46c4f5943cfffb413d962ce48b75e2fd39  examples/foundation-first-node.lock
-mesh-sdk      465beb4ea5e37eb36f6ba7fc60274de2d5a0d060  conformance/events/module-event.json
+mesh-sdk      90b20f5a3bda658be5fa3c868f0d9de1876521a0  conformance/events/module-event.json
 
 To move them, from this repository's root, with the two repositories checked out beside it:
 

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/files.go

@@ -74,6 +74,22 @@ func filesVerbs() []Verb {
 			map[string]string{"path": "an absolute path", "owner": "an account's name or number",
 				"group": "a group's name or number (optional)", "recursive": "\"true\": also everything under a directory"},
 			[]string{"path", "owner"}, []string{"group", "recursive"}, "chown", "chgrp"),
+		Verb{Name: "upload", Description: "Send one file of this node into a bucket of the object store, over a short signed link " +
+			"and never over the bus; answers the key (the file's SHA-256 when none is given), the size and the SHA-256. " +
+			"At most 100 MiB. A place a secret is kept, a known credential file, or a link to one is refused by name, " +
+			"before anything is sent. Read " + filesAsAccount + ".",
+			Input: schema(map[string]string{"path": "an absolute path to a file", "bucket": "the bucket the file goes into",
+				"key": "the object's key (optional; the file's SHA-256 when not given)"}, []string{"path", "bucket"})},
+		// download is a plain Verb, not through write(): write() types its optional arguments as true/false
+		// switches, which a hash and a reason are not (issue 1719).
+		Verb{Name: "download", Description: "Write one object of a bucket to a file of this node, over a short signed link and " +
+			"never over the bus; the old file goes to the node's trash. At most 100 MiB. The bytes must hash to sha256, or to " +
+			"the key when the key is a SHA-256; otherwise no file is written. Refuses a path a module owns " +
+			"unless override names a reason; done as the node's operator account, through sudo -n where its rights do not reach.",
+			Input: schema(map[string]string{"bucket": "the bucket", "key": "the object's key", "path": "an absolute path",
+				"sha256":   "the SHA-256 the bytes must have (optional; the key when that is a SHA-256)",
+				"reason":   "why the file is changed, for the audit trail",
+				"override": overrideWord}, []string{"bucket", "key", "path", "reason"})},
 		Verb{Name: "trash", Description: "What the node's trash holds: each deleted or replaced item with its id, " +
 			"original path and when it went.",
 			Input: schema(map[string]string{}, nil), Replaces: []string{"ls ~/.local/share/Trash"}},

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/manifest.go

@@ -2214,6 +2214,7 @@ func parseManifest(raw []byte, predefined PredefinedList) (Manifest, error) {
 	problems = append(problems, replacesProblems(m)...)
 	problems = append(problems, UnitSettingProblems(m)...)
 	problems = append(problems, OwnerSettingProblems(m)...)
+	problems = append(problems, GroupSettingProblems(m)...)
 	problems = append(problems, endpointNameProblems(m)...)
 	problems = append(problems, RouteProblems(m)...)
 	for _, port := range m.Guards {

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/resolve.go

@@ -904,7 +904,7 @@ func isModule(catalogue map[string]Manifest, want string) bool {
 // machine can host the module as far as its capabilities go.
 func missingCapabilities(m Manifest, node Node) []string {
 	var missing []string
-	for _, c := range m.Capabilities {
+	for _, c := range append(append([]string(nil), m.Capabilities...), impliedCapabilities(m)...) {
 		if !node.Capabilities[c] {
 			missing = append(missing, c)
 		}
@@ -1457,3 +1457,20 @@ func packageNames(m map[string][]string) []string {
 	sort.Strings(names)
 	return names
 }
+
+// ContainerGroups is the capability a node-engine reports when it reads a container's `groups` and passes each as a
+// supplementary group (novox/hq ADR 0480 clause 7, issue 1638). An older engine refuses the key (strict decoding).
+const ContainerGroups = "container-groups"
+
+// impliedCapabilities are the capabilities a module needs for what its resources say, beyond those it declares: a
+// container that names groups needs an engine that reads them, so the module is left out of a machine whose report
+// lacks the capability, naming it, and the field is sent to no engine that would refuse it. None for a module whose
+// containers name no groups.
+func impliedCapabilities(m Manifest) []string {
+	for _, r := range m.Resources {
+		if fmt.Sprint(r["type"]) == "container" && len(groupsOf(r)) > 0 {
+			return []string{ContainerGroups}
+		}
+	}
+	return nil
+}

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/seat_data.go

@@ -66,7 +66,8 @@ var capabilityName = regexp.MustCompile(`^[a-z0-9][a-z0-9-]*$`)
 // names an `if-capability` may give (novox/hq ADR 0255). A name nothing detects would leave its
 // contribution out on every machine, silently, so it is refused. A detector added there is added here.
 var KnownCapabilities = []string{
-	"battery", "container-runtime", "firewall", "graphical-session", "overlay", "package-manager",
+	"battery", "container-groups", "container-runtime", "file-references", "firewall", "graphical-session", "overlay",
+	"package-manager",
 	"power-meter", "privileged", "seat", "service-manager", "uplink-dhcpcd", "uplink-networkmanager",
 	"uplink-systemd-networkd", "user-namespaces", "virtualisation",
 }

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/setting_into.go

@@ -85,6 +85,9 @@ func settingInto(resource map[string]any, layers []Layer, module string) error {
 	if fmt.Sprint(resource["type"]) == "directory" {
 		return settingIntoOwner(resource, layers, module)
 	}
+	if fmt.Sprint(resource["type"]) == "container" {
+		return settingIntoGroups(resource, layers, module)
+	}
 	if fmt.Sprint(resource["type"]) != "file" {
 		return nil
 	}
@@ -343,6 +346,12 @@ func settingKeysAskedOutsideOwners(m Manifest) map[string]bool {
 			if unit, ok := r["unit"].(string); ok {
 				note(unit)
 			}
+		case "container":
+			for _, g := range groupsOf(r) {
+				if s, ok := g.(string); ok {
+					note(s)
+				}
+			}
 		}
 	}
 	inValues := func(values map[string]any) {
@@ -365,3 +374,100 @@ func settingKeysAskedOutsideOwners(m Manifest) map[string]bool {
 	}
 	return used
 }
+
+// A container's supplementary groups may be an operator's value (novox/hq ADR 0480 clause 7, ADR 0348 §11, issue 1636):
+// n8n joins the media library's group, whose number is the machine's, never the definition's (ADR 0112 §1). Each
+// element of `groups` is a whole placeholder or a whole number; a placeholder is filled with the number the
+// config value holds, and the list reaches the node-engine as numbers.
+
+// groupSide is one element of a container's groups: a whole placeholder or a whole number.
+var groupSide = regexp.MustCompile(`^(?:\$\{setting:[a-z0-9][a-z0-9_.-]*\}|[0-9]+)$`)
+
+// groupsOf is a container resource's groups as the manifest wrote them (text or numbers), none when it names none.
+func groupsOf(r map[string]any) []any {
+	groups, _ := r["groups"].([]any)
+	return groups
+}
+
+// GroupSettingProblems refuses, where a manifest is read, a container whose groups hold anything but whole
+// placeholders and whole numbers, or a placeholder whose key the module neither declares nor asks for elsewhere.
+func GroupSettingProblems(m Manifest) []string {
+	var problems []string
+	for _, r := range m.Resources {
+		if fmt.Sprint(r["type"]) != "container" {
+			continue
+		}
+		for _, g := range groupsOf(r) {
+			s, isText := g.(string)
+			if !isText {
+				continue // a number: the declaration judges its value
+			}
+			if !groupSide.MatchString(s) {
+				problems = append(problems, fmt.Sprintf("%s: the container %v's group %q is not a whole "+
+					"${config:key} or a whole number: a supplementary group is a number, and nothing else is "+
+					"written into it (novox/hq ADR 0480 clause 7)", m.Module, r["id"], s))
+				continue
+			}
+			if m.Templated() {
+				continue
+			}
+			for _, key := range settingsUsed(s) {
+				if _, declared := m.Settings[key]; !declared && !m.DeclaresConfig() {
+					continue // the settings form judges its own keys
+				}
+				if _, declared := m.Settings[key]; !declared {
+					problems = append(problems, fmt.Sprintf("%s: the container %v's group says ${config:%s}, and the module "+
+						"declares no such value (novox/hq ADR 0348 §4)", m.Module, r["id"], key))
+				}
+			}
+		}
+	}
+	return problems
+}
+
+// settingIntoGroups fills ${setting:…} in a container's groups, refusing — with the key and why, the resource left as
+// it was — a key nothing sets and a value that is not a whole number above zero. A number is kept; the list that
+// results is numbers alone.
+func settingIntoGroups(resource map[string]any, layers []Layer, module string) error {
+	groups := groupsOf(resource)
+	if len(groups) == 0 {
+		return nil
+	}
+	filled := make([]any, 0, len(groups))
+	for _, g := range groups {
+		s, isText := g.(string)
+		if !isText {
+			if f, isNumber := g.(float64); isNumber && f == float64(int(f)) {
+				g = int(f) // a number the manifest wrote, as the numbers a placeholder gives
+			}
+			filled = append(filled, g)
+			continue
+		}
+		keys := settingsUsed(s)
+		if len(keys) != 1 || settingRef.ReplaceAllString(s, "") != "" {
+			filled = append(filled, g) // not a whole placeholder: the manifest check refuses it
+			continue
+		}
+		key := keys[0]
+		value, set := settingValue(layers, key)
+		if !set {
+			return &UnsetSettingError{Module: module, Setting: key,
+				where: fmt.Sprintf("a container %v whose groups", resource["id"]), setToday: orNoSettings(layers),
+				said: fmt.Sprintf(
+					"%s has a container %v whose groups say ${setting:%s}, and nothing sets %q for it — an operator's "+
+						"value is the assignment's, never the definition's (novox/hq ADR 0112): "+
+						"`settings set %s <file>` with {%q: …}%s",
+					module, resource["id"], key, key, module, key, orNoSettings(layers))}
+		}
+		v := plainly(value)
+		id, whole := wholeID(v)
+		if !whole || id == 0 {
+			return fmt.Errorf("%s: the setting %q is %q, which cannot be a group of the container %v: a supplementary "+
+				"group is a whole number above zero, never a name or other text (novox/hq ADR 0480 clause 7, ADR 0328 §15)",
+				module, key, v, resource["id"])
+		}
+		filled = append(filled, int(id))
+	}
+	resource["groups"] = filled
+	return nil
+}

vendor/git.novox.be/novox/mesh-sdk/go/catalogue/unconsumed_placeholder.go

@@ -56,7 +56,7 @@ type filler struct {
 // seatInto, machineInto and contributionsInto. A pass that comes to read another field adds it here,
 // or the sweep refuses the placeholder it would have filled.
 var fillers = []filler{
-	{namespace: "setting", patterns: []*regexp.Regexp{settingRef}, fields: map[string][]string{"file": {"content"}, "service": {"unit"}, "directory": {"owner"}}},
+	{namespace: "setting", patterns: []*regexp.Regexp{settingRef}, fields: map[string][]string{"file": {"content"}, "service": {"unit"}, "directory": {"owner"}, "container": {"groups"}}},
 	{namespace: "dir", patterns: []*regexp.Regexp{dirRef}, fields: map[string][]string{"*": {"path", "content", "volumes", "env", "env-file"}}},
 	{namespace: "access", patterns: []*regexp.Regexp{accessRef}, fields: map[string][]string{"*": {"path", "content", "volumes", "env", "env-file"}}},
 	{namespace: "secret", patterns: []*regexp.Regexp{placeholder}, fields: map[string][]string{"file": {"content"}},

vendor/git.novox.be/novox/mesh-sdk/go/declaration/declaration.go

@@ -324,6 +324,15 @@ type File struct {
 	// depend on a field somewhere else.
 	Bytes string `json:"bytes,omitempty"`
 
+	// Digest and Size say the content is not carried but fetched: a file over FileReferenceThreshold travels as
+	// the sha256 digest of its content, "sha256:<64 hex>", and its size in bytes, in place of Content or Bytes
+	// (novox/hq ADR 0486 §1). The node-engine fetches the object of that name from FileBucket, checks what it
+	// received against Digest and Size, and only then writes the file. Exclusive with Content, Sealed, Bytes,
+	// VaultSealed and Secrets; sent only to an engine that reports FileReferencesCapability, as an older engine
+	// refuses a field it does not know, whole.
+	Digest string `json:"digest,omitempty"`
+	Size   int64  `json:"size,omitempty"`
+
 	// Owner is the user this belongs to, by name. Absent means root.
 	Owner string `json:"owner,omitempty"`
 
@@ -465,6 +474,10 @@ func (f *File) validate(where string, _ bool) []string {
 			problems = append(problems, where+": a file the vault sealed whole has no holes for secrets")
 		}
 	}
+	problems = append(problems, f.checkReference(where)...)
+	if f.Digest != "" || f.Size != 0 {
+		said = append(said, "digest")
+	}
 	if len(said) > 1 {
 		sort.Strings(said)
 		problems = append(problems, where+
@@ -1454,6 +1467,14 @@ type Container struct {
 	// container runs as its image says. Its key is `identity`, the manifest's word; the field is not, because
 	// a resource's Identity is its id.
 	RunAs *ContainerIdentity `json:"identity,omitempty"`
+
+	// Groups are the supplementary groups the container's process joins, as numbers, each passed to the runtime
+	// as a group to add (novox/hq ADR 0480 clause 7, issue 1636): n8n writes the media library through the
+	// library's group, which a stock image knows nothing of. Each is above zero and below the kernel's "no group"
+	// (ADR 0328 §15: never root). Part of the spec, so a change recreates the container. Absent: none are added.
+	// An older node-engine refuses the key (strict decoding), so the controller sends it only to a node that
+	// reports it reads it.
+	Groups []int64 `json:"groups,omitempty"`
 }
 
 // The ways an image is told who to run as (novox/hq ADR 0325 §2).
@@ -1521,6 +1542,30 @@ func (i *ContainerIdentity) problems(where string, env map[string]string) []stri
 	return problems
 }
 
+// groupProblems refuses a supplementary group that is root's or below it, the kernel's "no group" number, or a
+// number named twice (novox/hq ADR 0480 clause 7, ADR 0328 §15).
+func (c *Container) groupProblems(where string) []string {
+	var problems []string
+	seen := map[int64]bool{}
+	for _, g := range c.Groups {
+		switch {
+		case g == 0:
+			problems = append(problems, fmt.Sprintf("%s: container %s adds group 0, and the mesh never makes or keeps anything "+
+				"as root: a supplementary group is never root's (novox/hq ADR 0328 §15)", where, c.Name))
+		case g < 0:
+			problems = append(problems, fmt.Sprintf("%s: container %s adds group %d, below zero: a group is a whole number "+
+				"above zero", where, c.Name, g))
+		case g >= 1<<32-1:
+			problems = append(problems, fmt.Sprintf("%s: container %s adds group %d, which is the kernel's \"no group\" "+
+				"number or beyond it", where, c.Name, g))
+		case seen[g]:
+			problems = append(problems, fmt.Sprintf("%s: container %s adds group %d twice", where, c.Name, g))
+		}
+		seen[g] = true
+	}
+	return problems
+}
+
 func (c *Container) Identity() string { return c.ID }
 func (c *Container) Kind() Type       { return TypeContainer }
 func (c *Container) Target() string   { return c.Name }
@@ -1603,6 +1648,7 @@ func (c *Container) validate(where string, _ bool) []string {
 			"runs and exits, and joins nothing afterwards")
 	}
 	problems = append(problems, c.RunAs.problems(where+": container "+c.Name, c.Env)...)
+	problems = append(problems, c.groupProblems(where)...)
 	return append(problems, checkImage(where, c.Image)...)
 }
 

vendor/git.novox.be/novox/mesh-sdk/go/declaration/filereference.go

@@ -0,0 +1,125 @@
+package declaration
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+	"regexp"
+)
+
+// The three names of a file travelling by digest (novox/hq ADR 0486 §1, §2, §5), shared by the node-engine that
+// reads them and the controller that writes them.
+const (
+	// FileReferenceThreshold is the size above which a file travels by digest: a file of this many bytes or fewer
+	// stays in the declaration as it is.
+	FileReferenceThreshold = 64 * 1024
+	// FileBucket is the object bucket of the bus that holds the contents, each under the hex of its sha256 digest
+	// (ObjectName). The controller alone writes it; a node-engine reads an object by name.
+	FileBucket = "declaration-files"
+	// FileReferencesCapability is what a node-engine reports when it reads a file given as a digest and size.
+	FileReferencesCapability = "file-references"
+)
+
+var digestForm = regexp.MustCompile(`^sha256:[0-9a-f]{64}$`)
+
+// DigestOf is the digest a reference names for a content: "sha256:<64 lower-case hex>".
+func DigestOf(content []byte) string {
+	sum := sha256.Sum256(content)
+	return "sha256:" + hex.EncodeToString(sum[:])
+}
+
+// ObjectName is the name of the object holding the content a digest names: the hex without its "sha256:" prefix.
+func ObjectName(digest string) (string, error) {
+	if !digestForm.MatchString(digest) {
+		return "", fmt.Errorf("digest %q is not sha256:<64 lower-case hex characters>", digest)
+	}
+	return digest[len("sha256:"):], nil
+}
+
+// IsReference reports whether the file gives its content as a digest and size instead of carrying it.
+func (f *File) IsReference() bool { return f.Digest != "" }
+
+// checkReference judges the digest and size, and what a reference may not be given with.
+func (f *File) checkReference(where string) []string {
+	if f.Digest == "" && f.Size == 0 {
+		return nil
+	}
+	var problems []string
+	if !digestForm.MatchString(f.Digest) {
+		problems = append(problems, fmt.Sprintf("%s: digest %q; a file by reference names its content as "+
+			"sha256:<64 lower-case hex characters>", where, f.Digest))
+	}
+	if f.Size <= 0 {
+		problems = append(problems, fmt.Sprintf("%s: size %d; a file by reference states its size in bytes, "+
+			"more than zero", where, f.Size))
+	}
+	if f.Content != "" || f.Bytes != "" || f.Sealed != "" || f.VaultSealed != nil || len(f.Secrets) > 0 {
+		problems = append(problems, where+": a file by reference carries its content in the object its digest "+
+			"names, so it says no content, bytes, sealed, vault-sealed or secrets")
+	}
+	if f.Into != "" {
+		problems = append(problems, where+": a file by reference is written whole; a file written into says its "+
+			"part in content")
+	}
+	return problems
+}
+
+// Body is the bytes the file's content stands for: its content, or its bytes decoded.
+func (f *File) Body() ([]byte, error) {
+	if f.Bytes == "" {
+		return []byte(f.Content), nil
+	}
+	b, err := base64.StdEncoding.DecodeString(f.Bytes)
+	if err != nil {
+		return nil, fmt.Errorf("file %s: bytes are not base64: %w", f.ID, err)
+	}
+	return b, nil
+}
+
+// TravelsByDigest reports whether the controller may put this file's content in the bucket: it is plain content
+// or bytes (not sealed, not filled with secrets, not written into another file) of more than FileReferenceThreshold
+// bytes.
+func (f *File) TravelsByDigest() bool {
+	if f.IsReference() || f.Sealed != "" || f.VaultSealed != nil || len(f.Secrets) > 0 || f.Into != "" {
+		return false
+	}
+	if f.Bytes != "" {
+		// DecodedLen counts padding, so the exact length is taken off the decoded bytes.
+		body, err := f.Body()
+		return err == nil && len(body) > FileReferenceThreshold
+	}
+	return len(f.Content) > FileReferenceThreshold
+}
+
+// AsReference is the file as it is sent to an engine that reports FileReferencesCapability: a copy with the digest
+// and size in place of the content, and the content the controller puts into the bucket under ObjectName(digest).
+// A file that does not travel by digest is refused, not passed through, so a caller cannot send a small file empty.
+func (f *File) AsReference() (File, []byte, error) {
+	if !f.TravelsByDigest() {
+		return File{}, nil, fmt.Errorf("file %s does not travel by digest", f.ID)
+	}
+	body, err := f.Body()
+	if err != nil {
+		return File{}, nil, err
+	}
+	ref := *f
+	ref.Content, ref.Bytes = "", ""
+	ref.Digest, ref.Size = DigestOf(body), int64(len(body))
+	return ref, body, nil
+}
+
+// Verify checks what was fetched against the digest and size the file names; the node-engine writes the file only
+// after it returns nil. A mismatch is the apply's failure, never a partial apply (ADR 0486 §1).
+func (f *File) Verify(body []byte) error {
+	if !f.IsReference() {
+		return fmt.Errorf("file %s is not given by reference", f.ID)
+	}
+	if int64(len(body)) != f.Size {
+		return fmt.Errorf("file %s: the object is %d bytes and the declaration says %d", f.ID, len(body), f.Size)
+	}
+	if got := DigestOf(body); got != f.Digest {
+		return fmt.Errorf("file %s: the object hashes to %s and the declaration names %s", f.ID, got, f.Digest)
+	}
+	return nil
+}

vendor/git.novox.be/novox/mesh-sdk/go/delivery/buildrecord.go

@@ -25,7 +25,7 @@ type BuildRecord struct {
 }
 
 // Artifact is one thing a build made: mesh-controller internal/chain/records.go Artifact, json keys name, kind and
-// reference, nothing else (novox/hq ADR 0478 clause 7).
+// reference, nothing else (novox/hq ADR 0478 clause 8).
 type Artifact struct {
 	Name      string `json:"name"`
 	Kind      string `json:"kind"`

vendor/git.novox.be/novox/mesh-sdk/go/delivery/source.go

@@ -389,11 +389,20 @@ type Module struct {
 	Src        uint64       `json:"src,omitempty"`
 	Repository string       `json:"repository"`
 	Commit     string       `json:"commit"`
-	// Path is the module's directory in its repository, trimmed of slashes, empty when its manifest is the repository's
-	// root (novox/hq ADR 0478 clause 8): the build tools need it. A value written before has none.
+	// Path is the module's directory in its repository, trimmed of slashes, and RootPath (".") when its manifest is the
+	// repository's root (novox/hq ADR 0478 clause 9, issue 1615): the build tools need it. Empty means not known: a value
+	// written before the indexer learned paths has none.
 	Path string `json:"path,omitempty"`
+	// Toolchains are the toolchains FP2 was computed with, by language (go, typescript): the version installed and the
+	// build module's recipe version the build nodes agreed on then (novox/hq ADR 0477 clause 2, ADR 0478 clause 3). A builder
+	// builds the fingerprint only with these. Empty when FP2 is empty or the module has no toolchain; a value written
+	// before has none (issue 1615).
+	Toolchains map[string]ToolchainUsed `json:"toolchains,omitempty"`
 }
 
+// RootPath is Module.Path of a module whose manifest is its repository's root.
+const RootPath = "."
+
 // KeptInputs2 are SourceInputs2 without the module's name (the key has it) and without toolchains (those come from
 // the build modules' toolchain keys when the fingerprint is computed): what a Module keeps of a merge.
 type KeptInputs2 struct {
@@ -421,6 +430,11 @@ func (m Module) check() error {
 	case m.FP2 != "" && m.None2 != "":
 		return fmt.Errorf("delivery: a module has both fp2 and none2")
 	}
+	for language, t := range m.Toolchains {
+		if t.Version == "" || t.Recipe == "" {
+			return fmt.Errorf("delivery: the module's toolchain of %q needs its version and its recipe version", language)
+		}
+	}
 	if m.Inputs2 != nil && m.Manifest == "" {
 		return fmt.Errorf("delivery: a module keeps new-form inputs but has no manifest digest")
 	}

vendor/modules.txt

@@ -1,4 +1,4 @@
-# git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021093645-465beb4ea5e3
+# git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261021132116-90b20f5a3bda
 ## explicit; go 1.26.0
 git.novox.be/novox/mesh-sdk/go/asks
 git.novox.be/novox/mesh-sdk/go/catalogue