diff --git a/modules/mesh-delivery-indexer/internal/index/builds.go b/modules/mesh-delivery-indexer/internal/index/builds.go
index fb7e5d94..bba38c57 100644
--- a/modules/mesh-delivery-indexer/internal/index/builds.go
+++ b/modules/mesh-delivery-indexer/internal/index/builds.go
@@ -1,7 +1,6 @@
 package index
 
 import (
-	"encoding/json"
 	"fmt"
 	"maps"
 	"slices"
@@ -9,6 +8,7 @@ import (
 	"sync"
 	"time"
 
+	"git.novox.be/novox/mesh-delivery/sdk/buildlog"
 	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
@@ -33,7 +33,7 @@ func NewBuilds() *Builds { return &Builds{records: map[string]delivery.BuildReco
 // *The node-engine's own build*) is no build and is passed over, whatever its form. A build's entry that does not read, or
 // names no module or repository, is refused and said.
 func (b *Builds) Put(value []byte) error {
-	if !IsBuildEntry(value) {
+	if !buildlog.IsBuildEntry(value) {
 		return nil
 	}
 	e, err := delivery.DecodeBuildLogEntry(value)
@@ -184,16 +184,3 @@ func (b *Builds) Registered() []Registration {
 	}
 	return out
 }
-
-// IsBuildEntry says whether an entry of the builder's log is a build's start or end, read from its event alone, so an
-// entry of another kind is passed over before its form is read. One whose event cannot be read is taken as a build's, so
-// its decoding says what is wrong with it.
-func IsBuildEntry(value []byte) bool {
-	var e struct {
-		Event *string `json:"event"`
-	}
-	if json.Unmarshal(value, &e) != nil || e.Event == nil {
-		return true
-	}
-	return *e.Event == delivery.BuildStartedEvent || *e.Event == delivery.BuildEndedEvent
-}
diff --git a/modules/mesh-delivery-indexer/internal/index/imports.go b/modules/mesh-delivery-indexer/internal/index/imports.go
index 9042c833..81aa6261 100644
--- a/modules/mesh-delivery-indexer/internal/index/imports.go
+++ b/modules/mesh-delivery-indexer/internal/index/imports.go
@@ -6,6 +6,7 @@ import (
 	"maps"
 	"slices"
 
+	"git.novox.be/novox/mesh-delivery/sdk/buildlog"
 	"git.novox.be/novox/mesh-sdk/go/delivery"
 
 	"mesh-delivery-indexer/internal/fingerprint"
@@ -23,7 +24,7 @@ import (
 // Imports that cannot be resolved (a package the forge cannot list) are kept with no ImportForm: the next recompute that
 // resolves them writes the import form, one rebuild too many, never a stale module.
 func (ix *Indexer) ApplyBuildEnd(ctx context.Context, value []byte) error {
-	if !IsBuildEntry(value) {
+	if !buildlog.IsBuildEntry(value) {
 		return nil
 	}
 	e, err := delivery.DecodeBuildLogEntry(value)
diff --git a/modules/mesh-delivery-view/internal/view/read.go b/modules/mesh-delivery-view/internal/view/read.go
index 5f236fef..11c31b07 100644
--- a/modules/mesh-delivery-view/internal/view/read.go
+++ b/modules/mesh-delivery-view/internal/view/read.go
@@ -14,6 +14,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"git.novox.be/novox/mesh-delivery/sdk/buildlog"
 	stdio "git.novox.be/novox/mesh-sdk/go"
 	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
@@ -895,7 +896,7 @@ func (r Reader) BuildHistory(module string, since time.Time) (HistoryAnswer, err
 	}
 	var entries []delivery.BuildLogEntry
 	for _, le := range page.Entries {
-		if !isBuildEntry(le.Value) {
+		if !buildlog.IsBuildEntry(le.Value) {
 			continue // an entry of another kind (the old reference form's close, design 51) is no build
 		}
 		e, err := delivery.DecodeBuildLogEntry(le.Value)
@@ -927,16 +928,3 @@ func (r Reader) BuildHistory(module string, since time.Time) (HistoryAnswer, err
 	out.More = page.Next != 0
 	return out, nil
 }
-
-// isBuildEntry says whether an entry of the builder's log is a build's start or end, read from its event alone, so an entry
-// of another kind is passed over before its form is read. One whose event cannot be read is taken as a build's, so its
-// decoding says what is wrong with it.
-func isBuildEntry(value []byte) bool {
-	var e struct {
-		Event *string `json:"event"`
-	}
-	if json.Unmarshal(value, &e) != nil || e.Event == nil {
-		return true
-	}
-	return *e.Event == delivery.BuildStartedEvent || *e.Event == delivery.BuildEndedEvent
-}
diff --git a/sdk/buildlog/buildlog.go b/sdk/buildlog/buildlog.go
new file mode 100644
index 00000000..ae49fc58
--- /dev/null
+++ b/sdk/buildlog/buildlog.go
@@ -0,0 +1,21 @@
+// Package buildlog reads the builder's log as mesh-delivery's parts that follow it read it: the indexer and the view.
+package buildlog
+
+import (
+	"encoding/json"
+
+	"git.novox.be/novox/mesh-sdk/go/delivery"
+)
+
+// IsBuildEntry says whether an entry of the builder's log is a build's start or end, read from its event alone, so an
+// entry of another kind (a build's narration, build.said) is passed over before its form is read. One whose event
+// cannot be read is taken as a build's, so its decoding says what is wrong with it.
+func IsBuildEntry(value []byte) bool {
+	var e struct {
+		Event *string `json:"event"`
+	}
+	if json.Unmarshal(value, &e) != nil || e.Event == nil {
+		return true
+	}
+	return *e.Event == delivery.BuildStartedEvent || *e.Event == delivery.BuildEndedEvent
+}