diff --git a/assets/dnd/item-occurrences/prompts/instructions.md b/assets/dnd/item-occurrences/prompts/instructions.md
index 5bccf69..16e8b1e 100644
--- a/assets/dnd/item-occurrences/prompts/instructions.md
+++ b/assets/dnd/item-occurrences/prompts/instructions.md
@@ -5,8 +5,8 @@ across records, or infer ownership that the transcript does not establish.
 
 For every occurrence, use the supplied canonical item `name`. Record a stated
 quantity as an integer and leave it null when the transcript does not state
-one. Use a concise observed item name and preserve the stated currency
-denomination.
+one. Preserve the stated currency denomination through the selected canonical
+registry name.
 
 Use `discovered` when the party learns of or encounters an item without
 establishing possession. Use `acquired` when the party or a party member gains
diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index 2eb895b..20d25de 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -274,8 +274,9 @@ path.
    registry and the current `*source.SourceDocument`. Its API must provide:
    - a cloned `contracts.LLMInputMaterial` for the `location_registry` slot;
    - deterministic resolution of a returned selector to one cloned
-     `dnd.Location`; and
-   - the digest of the exact model projection.
+     `dnd.Location`.
+   The prompt material's existing `Digest` field owns the digest of the exact
+   model projection; do not expose a second grounding-specific digest API.
 4. Construct the projection in registry order. Group entries by the existing
    location comparison key:
    - every projection entry has exactly the required fields `name`,
@@ -299,10 +300,10 @@ path.
 7. Separate deterministic identity fingerprinting from LLM material. Add
    `IdentityDigest()` over the registry's ordered `{id,name}` identity
    projection, and update the location normalizer and registry-validator
-   checkpoint consumers to use it. The new operation grounding owns the model
-   projection digest. Retain the old ID-bearing prompt accessor only as a
-   documented transitional dependency of the still-unchanged location
-   occurrence extractor; do not add new callers.
+   checkpoint consumers to use it. The new operation grounding carries the
+   model projection digest in its `LLMInputMaterial`. Retain the old ID-bearing
+   prompt accessor only as a documented transitional dependency of the
+   still-unchanged location occurrence extractor; do not add new callers.
 8. Add focused tests for unique names, same-name context and selectors,
    canonical range order, deterministic projection/digest, defensive copies,
    exact selector resolution, nil/foreign/invalid references, selector
@@ -367,10 +368,12 @@ remove durable location IDs from the prompt and private response.
 7. Change `mappingPolicy` to
    `dnd.location_occurrences.extract_mapping.v2`.
 8. Remove the legacy ID-bearing registry `PromptInput` and its model-projection
-   digest once the extractor uses operation grounding. Update the occurrence
-   checkpoint to combine `IdentityDigest()` with the new grounding projection
-   digest, prompt/schema fingerprint, mapping policy, and its existing inputs;
-   do not retain dead compatibility aliases.
+   digest once the extractor uses operation grounding. Keep the occurrence's
+   static module fingerprint based on `IdentityDigest()`, prompt/schema
+   fingerprints, and mapping policy. The operation-scoped projection is already
+   covered by source/chunk identity and configured or generated reference
+   dependencies, while its `LLMInputMaterial.Digest` identifies the exact model
+   input; do not add a second digest API or operation-aware static fingerprint.
 9. Update focused schema, prompt, extractor, canonicalization, checkpoint, and
    generated-reference tests. Cover unique-name empty selectors, successful
    same-name selection, failure for an unsupported ambiguous mention,
diff --git a/internal/modules/dnd/extract/itemoccurrences/canonicalize.go b/internal/modules/dnd/extract/itemoccurrences/canonicalize.go
index ab9bba0..0a59060 100644
--- a/internal/modules/dnd/extract/itemoccurrences/canonicalize.go
+++ b/internal/modules/dnd/extract/itemoccurrences/canonicalize.go
@@ -10,26 +10,34 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
-type orderedItemOccurrenceResponse struct {
-	value       itemOccurrenceResponse
+type orderedItemOccurrence struct {
+	value       dnd.ItemOccurrence
 	earliest    int
 	hasEvidence bool
 }
 
-func canonicalizeResponse(response *extractionResponse, order shared.SourceRefOrder, sourceID string, registry *itemregistry.Registry) error {
-	if response == nil {
-		return nil
+func canonicalItemOccurrenceList(response extractionResponse, order shared.SourceRefOrder, sourceID string, registry *itemregistry.Registry) (dnd.ItemOccurrenceList, error) {
+	if response.Occurrences == nil {
+		return dnd.ItemOccurrenceList{}, nil
 	}
-	ordered := make([]orderedItemOccurrenceResponse, len(response.Occurrences))
-	for index := range response.Occurrences {
-		canonical, found := registry.Lookup(response.Occurrences[index].Name)
+	ordered := make([]orderedItemOccurrence, len(response.Occurrences))
+	for index, occurrence := range response.Occurrences {
+		item, found := registry.Lookup(occurrence.Name)
 		if !found {
-			return fmt.Errorf("occurrences[%d].name is not in the item registry", index)
+			return dnd.ItemOccurrenceList{}, fmt.Errorf("occurrences[%d].name is not in the item registry", index)
 		}
-		response.Occurrences[index].Name = canonical.Name
-		earliest, hasEvidence := canonicalizeItemOccurrence(&response.Occurrences[index], order, sourceID)
-		ordered[index] = orderedItemOccurrenceResponse{
-			value:       response.Occurrences[index],
+		refs := order.Canonicalize(itemOccurrenceSourceRefs(occurrence.SourceRefs, sourceID))
+		earliest, hasEvidence := order.EarliestValid(refs)
+		ordered[index] = orderedItemOccurrence{
+			value: dnd.ItemOccurrence{
+				ItemID:     item.ID,
+				Name:       item.Name,
+				Kind:       dnd.ItemOccurrenceKind(occurrence.Kind),
+				Quantity:   cloneQuantity(occurrence.Quantity),
+				From:       occurrence.From,
+				To:         occurrence.To,
+				SourceRefs: refs,
+			},
 			earliest:    earliest,
 			hasEvidence: hasEvidence,
 		}
@@ -43,40 +51,9 @@ func canonicalizeResponse(response *extractionResponse, order shared.SourceRefOr
 		}
 		return ordered[left].earliest < ordered[right].earliest
 	})
-	for index := range ordered {
-		response.Occurrences[index] = ordered[index].value
-	}
-	return nil
-}
-
-func canonicalizeItemOccurrence(occurrence *itemOccurrenceResponse, order shared.SourceRefOrder, sourceID string) (int, bool) {
-	if occurrence == nil {
-		return 0, false
-	}
-	refs := order.Canonicalize(itemOccurrenceSourceRefs(occurrence.SourceRefs, sourceID))
-	occurrence.SourceRefs = itemOccurrenceResponseRefs(refs)
-	return order.EarliestValid(refs)
-}
-
-func canonicalItemOccurrenceList(response extractionResponse, sourceID string, registry *itemregistry.Registry) (dnd.ItemOccurrenceList, error) {
-	if response.Occurrences == nil {
-		return dnd.ItemOccurrenceList{}, nil
-	}
-	occurrences := make([]dnd.ItemOccurrence, 0, len(response.Occurrences))
-	for index, occurrence := range response.Occurrences {
-		item, found := registry.Lookup(occurrence.Name)
-		if !found {
-			return dnd.ItemOccurrenceList{}, fmt.Errorf("occurrences[%d].name is not in the item registry", index)
-		}
-		occurrences = append(occurrences, dnd.ItemOccurrence{
-			ItemID:     item.ID,
-			Name:       item.Name,
-			Kind:       dnd.ItemOccurrenceKind(occurrence.Kind),
-			Quantity:   cloneQuantity(occurrence.Quantity),
-			From:       occurrence.From,
-			To:         occurrence.To,
-			SourceRefs: itemOccurrenceSourceRefs(occurrence.SourceRefs, sourceID),
-		})
+	occurrences := make([]dnd.ItemOccurrence, len(ordered))
+	for index, occurrence := range ordered {
+		occurrences[index] = occurrence.value
 	}
 	return dnd.ItemOccurrenceList{Occurrences: occurrences}, nil
 }
@@ -92,17 +69,6 @@ func itemOccurrenceSourceRefs(refs []itemOccurrenceSourceRefResponse, sourceID s
 	return values
 }
 
-func itemOccurrenceResponseRefs(refs []source.SourceRef) []itemOccurrenceSourceRefResponse {
-	if refs == nil {
-		return nil
-	}
-	values := make([]itemOccurrenceSourceRefResponse, len(refs))
-	for index, ref := range refs {
-		values[index] = itemOccurrenceSourceRefResponse{StartSegment: ref.StartUnitID, EndSegment: ref.EndUnitID}
-	}
-	return values
-}
-
 func cloneQuantity(value *int) *int {
 	if value == nil {
 		return nil
diff --git a/internal/modules/dnd/extract/itemoccurrences/extractor.go b/internal/modules/dnd/extract/itemoccurrences/extractor.go
index 4a1903f..b61fc58 100644
--- a/internal/modules/dnd/extract/itemoccurrences/extractor.go
+++ b/internal/modules/dnd/extract/itemoccurrences/extractor.go
@@ -161,12 +161,9 @@ func (e *Extractor) Extract(ctx context.Context, req contracts.TypedExtractionRe
 	}, &response); err != nil {
 		return contracts.TypedExtractionResult[dnd.ItemOccurrenceList]{}, extractorErrorf("complete structured output: %w", err)
 	}
-	if err := canonicalizeResponse(&response, order, req.Source.ID, registry); err != nil {
-		return contracts.TypedExtractionResult[dnd.ItemOccurrenceList]{}, extractorErrorf("map item occurrence response: %w", err)
-	}
-	value, err := canonicalItemOccurrenceList(response, req.Source.ID, registry)
+	value, err := canonicalItemOccurrenceList(response, order, req.Source.ID, registry)
 	if err != nil {
-		return contracts.TypedExtractionResult[dnd.ItemOccurrenceList]{}, extractorErrorf("resolve canonical item occurrence names: %w", err)
+		return contracts.TypedExtractionResult[dnd.ItemOccurrenceList]{}, extractorErrorf("map item occurrence response: %w", err)
 	}
 	return contracts.TypedExtractionResult[dnd.ItemOccurrenceList]{Value: value}, nil
 }
diff --git a/internal/modules/dnd/locations/registry/grounding.go b/internal/modules/dnd/locations/registry/grounding.go
index 56803e5..db2bb78 100644
--- a/internal/modules/dnd/locations/registry/grounding.go
+++ b/internal/modules/dnd/locations/registry/grounding.go
@@ -36,7 +36,6 @@ type ContextUnit struct {
 // Its prompt input contains no durable IDs or source IDs.
 type Grounding struct {
 	promptInput         contracts.LLMInputMaterial
-	projectionDigest    string
 	locationsBySelector map[string]dnd.Location
 }
 
@@ -104,7 +103,6 @@ func NewGrounding(registry *Registry, doc *source.SourceDocument) (*Grounding, e
 	digest := semanticDigest(content)
 	return &Grounding{
 		promptInput:         contracts.NewLLMInputMaterial(ReferenceSlot, locationcodec.MediaType, content, digest, ""),
-		projectionDigest:    digest,
 		locationsBySelector: locationsBySelector,
 	}, nil
 }
@@ -118,14 +116,6 @@ func (g *Grounding) PromptInput() contracts.LLMInputMaterial {
 	return g.promptInput.Clone()
 }
 
-// ProjectionDigest returns the digest of the exact contextual prompt input.
-func (g *Grounding) ProjectionDigest() string {
-	if g == nil {
-		return ""
-	}
-	return g.projectionDigest
-}
-
 // Resolve maps a contextual selector to one canonical location.
 func (g *Grounding) Resolve(selector Selector) (dnd.Location, bool) {
 	if g == nil {
diff --git a/internal/modules/dnd/locations/registry/registry_test.go b/internal/modules/dnd/locations/registry/registry_test.go
index e081837..a8a0a74 100644
--- a/internal/modules/dnd/locations/registry/registry_test.go
+++ b/internal/modules/dnd/locations/registry/registry_test.go
@@ -216,8 +216,8 @@ func TestGroundingProjectsAndResolvesUniqueAndSameNameLocations(t *testing.T) {
 	if bytes.Contains(grounding.PromptInput().Content, []byte("location:sha256:")) || bytes.Contains(grounding.PromptInput().Content, []byte(`"source_id"`)) {
 		t.Fatalf("grounding projection exposed durable identity: %s", grounding.PromptInput().Content)
 	}
-	if grounding.ProjectionDigest() == "" || grounding.ProjectionDigest() == registry.IdentityDigest() || grounding.PromptInput().Digest != grounding.ProjectionDigest() {
-		t.Fatalf("grounding/identity digests = %q/%q", grounding.ProjectionDigest(), registry.IdentityDigest())
+	if grounding.PromptInput().Digest == "" || grounding.PromptInput().Digest == registry.IdentityDigest() {
+		t.Fatalf("grounding/identity digests = %q/%q", grounding.PromptInput().Digest, registry.IdentityDigest())
 	}
 
 	resolved, ok := grounding.Resolve(Selector{Name: " the tavern ", RegistryRefs: []RegistryRef{{StartUnitID: 30, EndUnitID: 30}, {StartUnitID: 20, EndUnitID: 20}}})
@@ -276,8 +276,8 @@ func TestGroundingHandlesEmptyRegistriesAndIdentityFingerprints(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if base.IdentityDigest() != expanded.IdentityDigest() || baseGrounding.ProjectionDigest() != expandedGrounding.ProjectionDigest() {
-		t.Fatalf("identity/model fingerprints = %q/%q and %q/%q", base.IdentityDigest(), expanded.IdentityDigest(), baseGrounding.ProjectionDigest(), expandedGrounding.ProjectionDigest())
+	if base.IdentityDigest() != expanded.IdentityDigest() || baseGrounding.PromptInput().Digest != expandedGrounding.PromptInput().Digest {
+		t.Fatalf("identity/model fingerprints = %q/%q and %q/%q", base.IdentityDigest(), expanded.IdentityDigest(), baseGrounding.PromptInput().Digest, expandedGrounding.PromptInput().Digest)
 	}
 }