diff --git a/plugin/deps.go b/plugin/deps.go
index 0380848..2ccefb6 100644
--- a/plugin/deps.go
+++ b/plugin/deps.go
@@ -12,6 +12,7 @@ import (
 	"git.dev.alexdunmow.com/block/core/menus"
 	"git.dev.alexdunmow.com/block/core/settings"
 	"git.dev.alexdunmow.com/block/core/subscriptions"
+	"github.com/google/uuid"
 )
 
 // ServiceDeps provides dependencies that plugins need for RPC service handlers.
@@ -59,11 +60,19 @@ type JobRunner interface {
 // EmbeddingService generates and manages text embeddings.
 type EmbeddingService interface {
 	GenerateEmbedding(ctx context.Context, text string) ([]float32, error)
+	EmbedContent(ctx context.Context, sourceType string, sourceID uuid.UUID, text string) (bool, error)
+	IsAvailable() bool
 }
 
+// ContentFetcher retrieves the title and full text for a content item so the
+// RAG service can re-index it after changes. Plugins register one per content type.
+type ContentFetcher func(ctx context.Context, contentID uuid.UUID) (title string, text string, err error)
+
 // RAGService provides retrieval-augmented generation for AI agents.
 type RAGService interface {
 	Query(ctx context.Context, query string, limit int) ([]RAGResult, error)
+	RegisterContentFetcher(contentType string, fetcher ContentFetcher)
+	OnContentChanged(ctx context.Context, contentType string, contentID uuid.UUID)
 }
 
 // RAGResult is a single result from a RAG query.