diff --git a/go/catalogue/manifest.go b/go/catalogue/manifest.go
index ec6f765..ef1f49c 100644
--- a/go/catalogue/manifest.go
+++ b/go/catalogue/manifest.go
@@ -587,6 +587,11 @@ type Manifest struct {
 	// person's account (design 25 §7) already had the same shape.
 	Invokes []string `json:"invokes,omitempty"`
 
+	// InvokeFields maps a verb of Invokes to the fields it names, read from an entry of `invokes` in its long form
+	// {verb, fields}, which may stand beside `*` (design 47 G §617): Invokes keeps the verb, so none of its readers
+	// changes. A long-form entry naming no field is a verb of Invokes alone.
+	InvokeFields map[string][]string `json:"-"`
+
 	// Waits are the event families a session may wait on through the mesh MCP server's `mesh_wait`, each
 	// `<emitter>.<event>` as `consumes` names one, a seat's or a module's (novox/hq ADR 0367 §2). Only the tool
 	// runner's module declares them, one by one and never by a wildcard. **A grant apart from `consumes`**: the
@@ -1582,6 +1587,10 @@ func (m *Manifest) UnmarshalJSON(raw []byte) error {
 	if err := consumesEntryProblem(keys["consumes"]); err != nil {
 		return err
 	}
+	invokeFields, err := readInvokes(keys)
+	if err != nil {
+		return err
+	}
 	plain := map[string]string{}
 	many := map[string]map[string]string{}
 	if secrets, ok := keys["secrets"]; ok && string(secrets) != "null" {
@@ -1736,6 +1745,7 @@ func (m *Manifest) UnmarshalJSON(raw []byte) error {
 	m.forms = forms
 	m.OptionalRequires = optionalRequires
 	m.RequireShares = requireShares
+	m.InvokeFields = invokeFields
 	if len(plain) > 0 {
 		m.Secrets = plain
 	}
@@ -1754,6 +1764,61 @@ func (m *Manifest) UnmarshalJSON(raw []byte) error {
 	return nil
 }
 
+// invokeLongForm is an entry of `invokes` in its long form: the verb, and the fields of its answer the caller relies on
+// (design 47 G §617).
+type invokeLongForm struct {
+	Verb   string   `json:"verb"`
+	Fields []string `json:"fields,omitempty"`
+}
+
+// readInvokes reads `invokes` whose entries are verbs or, in their long form, {verb, fields}: it puts the verbs back in
+// keys as plain names and answers the fields each long-form entry names.
+func readInvokes(keys map[string]json.RawMessage) (map[string][]string, error) {
+	raw, ok := keys["invokes"]
+	if !ok || string(raw) == "null" {
+		return nil, nil
+	}
+	var entries []json.RawMessage
+	if err := json.Unmarshal(raw, &entries); err != nil {
+		return nil, nil // not a list: the field's own decoder says so
+	}
+	var verbs []string
+	var fields map[string][]string
+	for i, e := range entries {
+		trimmed := bytes.TrimSpace(e)
+		if len(trimmed) == 0 || trimmed[0] != '{' {
+			var verb string
+			if err := json.Unmarshal(trimmed, &verb); err != nil {
+				return nil, fmt.Errorf("invokes[%d]: a verb, or {verb, fields}: %w", i, err)
+			}
+			verbs = append(verbs, verb)
+			continue
+		}
+		var long invokeLongForm
+		dec := json.NewDecoder(bytes.NewReader(trimmed))
+		dec.DisallowUnknownFields()
+		if err := dec.Decode(&long); err != nil {
+			return nil, fmt.Errorf("invokes[%d]: a verb, or {verb, fields}: %w", i, err)
+		}
+		if long.Verb == "" {
+			return nil, fmt.Errorf("invokes[%d]: a long-form entry names its verb", i)
+		}
+		verbs = append(verbs, long.Verb)
+		if len(long.Fields) > 0 {
+			if fields == nil {
+				fields = map[string][]string{}
+			}
+			fields[long.Verb] = long.Fields
+		}
+	}
+	plain, err := json.Marshal(verbs)
+	if err != nil {
+		return nil, err
+	}
+	keys["invokes"] = plain
+	return fields, nil
+}
+
 // checkSharesNotContributed refuses a module whose own `contributes` to s3-bucket names `shares` (ADR 0468 §8).
 func (m Manifest) checkSharesNotContributed() error {
 	if len(m.RequireShares[BucketRequirement]) == 0 {
@@ -1807,13 +1872,30 @@ func (m Manifest) marshalFields() ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	if len(m.SecretsMany) == 0 && len(m.ContributesMany) == 0 && len(m.OptionalRequires) == 0 && len(m.RequireShares) == 0 {
+	if len(m.SecretsMany) == 0 && len(m.ContributesMany) == 0 && len(m.OptionalRequires) == 0 && len(m.RequireShares) == 0 &&
+		len(m.InvokeFields) == 0 {
 		return raw, nil
 	}
 	var keys map[string]json.RawMessage
 	if err := json.Unmarshal(raw, &keys); err != nil {
 		return nil, err
 	}
+	if len(m.InvokeFields) > 0 {
+		// Each verb that names fields is written back in its long form (design 47 G §617).
+		entries := make([]any, 0, len(m.Invokes))
+		for _, verb := range m.Invokes {
+			if fields, named := m.InvokeFields[verb]; named {
+				entries = append(entries, invokeLongForm{Verb: verb, Fields: fields})
+				continue
+			}
+			entries = append(entries, verb)
+		}
+		listed, err := json.Marshal(entries)
+		if err != nil {
+			return nil, err
+		}
+		keys["invokes"] = listed
+	}
 	if optional := optionalRequiresList(m); len(optional) > 0 {
 		// Beside `requires`, never inside it: an older controller reads `requires` as plain names, and one
 		// manifest it cannot read stops the whole catalogue (OptionalRequiresKey).
diff --git a/go/catalogue/reader_release_test.go b/go/catalogue/reader_release_test.go
index a52ba46..0a4f4e5 100644
--- a/go/catalogue/reader_release_test.go
+++ b/go/catalogue/reader_release_test.go
@@ -1,6 +1,8 @@
 package catalogue
 
 import (
+	"encoding/json"
+	"slices"
 	"strings"
 	"testing"
 )
@@ -43,6 +45,18 @@ func TestTheSecondReaderReleaseReadsGsManifestWords(t *testing.T) {
 				a := m.Build.Artifacts
 				return len(a) == 2 && len(a[0].Calls) == 1 && a[0].Calls[0] == "put-sessions" && len(a[1].States) == 2
 			}},
+		{name: "* with two long-form invokes (§617)",
+			raw: `{"module":"m","version":"1.0","invokes":["*",{"verb":"seat:mesh-catalog.revision","fields":["none-yet"]},` +
+				`{"verb":"seat:mesh-catalog.entry"}]}`,
+			check: func(m Manifest) bool {
+				out, _ := json.Marshal(m)
+				return slices.Equal(m.Invokes, []string{"*", "seat:mesh-catalog.revision", "seat:mesh-catalog.entry"}) &&
+					len(m.InvokeFields) == 1 && slices.Equal(m.InvokeFields["seat:mesh-catalog.revision"], []string{"none-yet"}) &&
+					strings.Contains(string(out), `"invokes":["*",{"verb":"seat:mesh-catalog.revision","fields":["none-yet"]},"seat:mesh-catalog.entry"]`)
+			}},
+		{name: "a long-form invoke with a word it does not know (§617)",
+			raw:     `{"module":"m","version":"1.0","invokes":[{"verb":"seat:mesh-catalog.revision","field":["none-yet"]}]}`,
+			refused: `invokes[0]: a verb, or {verb, fields}`},
 	} {
 		m, err := decodeForTest([]byte(c.raw))
 		switch {