added snippets in all languages

automation/snippets/templates/rust/Cargo.toml

@@ -15,4 +15,5 @@ serde_json = "1.0.145"
 tempfile = "3"
 tokio = { version = "1.48.0", features = ["rt-multi-thread", "macros"] }
 ureq = { version = "3", features = ["json"] }
-uuid = { version = "1.18.1", features = ["v4"] }
+uuid = { version = "1.18.1", features = ["v4", "v5"] }
+sha2 = "0.11"

qdrant-landing/content/documentation/headless/content/tutorials/operations.md

@@ -6,6 +6,6 @@
 | [Time-Based Sharding](/documentation/tutorials-operations/time-based-sharding/) | Efficiently manage time-series data with user-defined sharding. | <span class="pill">Any</span> | 1h | <span class="text-yellow">Intermediate</span> |
 | [Large-Scale Search](/documentation/tutorials-operations/large-scale-search/) | Cost-efficient search for LAION-400M datasets. | <span class="pill">Any</span> | 48h | <span class="text-red">Advanced</span> |
 | [Secure a Self-Hosted Instance](/documentation/tutorials-operations/secure-qdrant/) | Enable TLS, API keys, and JWT access control. | <span class="pill">Any</span> | 45m | <span class="text-yellow">Intermediate</span> |
-| [Incremental Embedding Updates](/documentation/tutorials-operations/incremental-embedding-updates/) | Sync embeddings with changing raw text data. | <span class="pill">Python</span> | 25m | <span class="text-green">Beginner</span> |
+| [Incremental Embedding Updates](/documentation/tutorials-operations/incremental-embedding-updates/) | Sync embeddings with changing raw text data. | <span class="pill">Any</span> | 25m | <span class="text-green">Beginner</span> |
 | [Qdrant Cloud Prometheus Monitoring](/documentation/ops-monitoring/managed-cloud-prometheus/) | Observability with Prometheus and Grafana. | <span class="pill">Prometheus</span> | 30m | <span class="text-yellow">Intermediate</span> |
 | [Self-Hosted Prometheus Monitoring](/documentation/ops-monitoring/hybrid-cloud-prometheus/) | Observability for hybrid/private cloud setups. | <span class="pill">Prometheus</span> | 30m | <span class="text-yellow">Intermediate</span> |

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/csharp.cs

@@ -0,0 +1,310 @@
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.RegularExpressions;
+using Qdrant.Client;
+using Qdrant.Client.Grpc;
+using static Qdrant.Client.Grpc.Conditions;
+using Chunk = (string Url, string Anchor, int ChunkNum, string Text, string SectionUrl, string ContentHash, string PointId);
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		// @block-start client-connection
+		var QDRANT_URL = Environment.GetEnvironmentVariable("QDRANT_URL");
+		var QDRANT_API_KEY = Environment.GetEnvironmentVariable("QDRANT_API_KEY");
+
+		var client = new QdrantClient(
+			host: QDRANT_URL!,
+			https: true,
+			apiKey: QDRANT_API_KEY
+		);
+		// @block-end client-connection
+
+		// @hide-start
+		// data and text normalization are not the lesson of this tutorial:
+		// the full CHUNKS list and Normalize() live in the tutorial notebook
+		var CHUNKS = new List<Chunk>
+		{
+			(
+				Url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+				Anchor: "prerequisites",
+				ChunkNum: 0,
+				Text: "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ...",
+				SectionUrl: "", ContentHash: "", PointId: ""
+			),
+			(
+				Url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+				Anchor: "step-3-enable-an-admin-api-key",
+				ChunkNum: 0,
+				Text: "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ...",
+				SectionUrl: "", ContentHash: "", PointId: ""
+			),
+		};
+
+		string Normalize(string text) => Regex.Replace(text, @"\s+", " ").Trim();
+		// @hide-end
+
+		// @block-start create-collection
+		var MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+		var PIPELINE = "docs-prep-pipeline-v1";
+		var COLLECTION = "docs-sync-tutorial";
+
+		await client.CreateCollectionAsync(
+			collectionName: COLLECTION,
+			vectorsConfig: new VectorParams
+			{
+				Size = 384, // all-MiniLM-L6-v2 output dimension
+				Distance = Distance.Cosine
+			},
+			metadata: new()
+			{
+				["embedding_model"] = MODEL,
+				["pipeline_version"] = PIPELINE
+			}
+		);
+		// @block-end create-collection
+
+		// @block-start check-gate
+		async Task CheckGate()
+		{
+			// compare this pipeline's constants against what the collection records about itself
+			var meta = (await client.GetCollectionInfoAsync(COLLECTION)).Config.Metadata;
+			var model = meta.GetValueOrDefault("embedding_model")?.StringValue;
+			var pipeline = meta.GetValueOrDefault("pipeline_version")?.StringValue;
+
+			if (model != MODEL || pipeline != PIPELINE)
+				throw new InvalidOperationException(
+					$"collection was built by {model}/{pipeline}: full re-embed into a fresh collection required");
+		}
+		// @block-end check-gate
+
+		// @block-start identity-and-fingerprint
+		string ContentHash(string text) =>
+			Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(text))).ToLowerInvariant();
+
+		// Qdrant accepts any well-formed UUID as a point ID:
+		// a Guid built from the first 16 bytes of the address hash, so the same address always yields the same ID
+		string PointIdFor(string url, string anchor, int num) =>
+			new Guid(SHA256.HashData(Encoding.UTF8.GetBytes($"{url}#{anchor}::{num}")).AsSpan(0, 16)).ToString();
+
+		// Derive both values (and the section address) for every raw chunk.
+		List<Chunk> PrepareChunksForSync(List<Chunk> chunks)
+		{
+			var prepared = new List<Chunk>();
+			foreach (var c in chunks)
+			{
+				var text = Normalize(c.Text);
+				prepared.Add(c with
+				{
+					Text = text,
+					SectionUrl = c.Anchor != "" ? $"{c.Url}#{c.Anchor}" : c.Url,
+					ContentHash = ContentHash(text),
+					PointId = PointIdFor(c.Url, c.Anchor, c.ChunkNum),
+				});
+			}
+			return prepared;
+		}
+		// @block-end identity-and-fingerprint
+
+		// @block-start payload
+		Dictionary<string, Value> Payload(Chunk chunk, string? lastUpdated = null) => new()
+		{
+			["url"] = chunk.Url,
+			["anchor"] = chunk.Anchor,
+			["chunk_num"] = chunk.ChunkNum,
+			["section_url"] = chunk.SectionUrl,
+			["text"] = chunk.Text,
+			["content_hash"] = chunk.ContentHash,
+			["last_updated"] = lastUpdated ?? DateTimeOffset.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssK"),
+		};
+		// @block-end payload
+
+		// @block-start payload-indexes
+		foreach (var field in new[] { "content_hash", "url", "section_url" })
+			await client.CreatePayloadIndexAsync(COLLECTION, field, PayloadSchemaType.Keyword);
+		// @block-end payload-indexes
+
+		// @block-start populate
+		await client.UpsertAsync(
+			collectionName: COLLECTION,
+			points: PrepareChunksForSync(CHUNKS).Select(c => new PointStruct
+			{
+				Id = new PointId { Uuid = c.PointId },
+				Vectors = new Document { Text = c.Text, Model = MODEL },
+				Payload = { Payload(c) },
+			}).ToList(),
+			wait: true
+		);
+		// @block-end populate
+
+		// @block-start search
+		var QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+		await client.QueryAsync(
+			collectionName: COLLECTION,
+			query: new Document { Text = QUERY, Model = MODEL },
+			limit: 3,
+			payloadSelector: new[] { "section_url", "text" }
+		);
+		// @block-end search
+
+		// @hide-start
+		// the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+		var LATEST_CHUNKS = PrepareChunksForSync(CHUNKS);
+		// @hide-end
+
+		// @block-start split-by-state
+		// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+		async Task<(Dictionary<string, Chunk> incomingIds, List<Chunk> unchanged, List<Chunk> contentChanged, List<Chunk> unknownIds)>
+			SplitByState(List<Chunk> latestChunks)
+		{
+			var incoming = latestChunks.ToDictionary(c => c.PointId);
+
+			var stored = new Dictionary<string, string>();
+			var points = await client.RetrieveAsync(
+				COLLECTION,
+				ids: incoming.Keys.Select(pid => new PointId { Uuid = pid }).ToList(),
+				payloadSelector: new[] { "content_hash" },
+				vectorSelector: false
+			);
+			foreach (var p in points)
+				stored[p.Id.Uuid] = p.Payload["content_hash"].StringValue;
+
+			var unchanged = new List<Chunk>();
+			var contentChanged = new List<Chunk>();
+			var unknownIds = new List<Chunk>();
+			foreach (var (pid, c) in incoming)
+			{
+				if (stored.TryGetValue(pid, out var hash) && hash == c.ContentHash)
+					unchanged.Add(c);
+				else if (stored.ContainsKey(pid))
+					contentChanged.Add(c);
+				else
+					unknownIds.Add(c);
+			}
+
+			return (incoming, unchanged, contentChanged, unknownIds);
+		}
+
+		var splitState = await SplitByState(LATEST_CHUNKS);
+		// @block-end split-by-state
+
+		// @block-start re-embed-changed
+		async Task ReEmbedChanged(List<Chunk> contentChanged)
+		{
+			if (contentChanged.Count == 0)
+				return;
+			await client.UpsertAsync(
+				collectionName: COLLECTION,
+				points: contentChanged.Select(c => new PointStruct
+				{
+					Id = new PointId { Uuid = c.PointId },
+					Vectors = new Document { Text = c.Text, Model = MODEL },
+					Payload = { Payload(c) },
+				}).ToList(),
+				wait: true
+			);
+		}
+		// @block-end re-embed-changed
+
+		// @block-start reuse-or-add
+		// Reuse an existing embedding when the same text is already stored; embed only what is new.
+		async Task<(int reused, int added)> ReuseOrAdd(List<Chunk> unknownIds)
+		{
+			int reused = 0, added = 0;
+
+			foreach (var c in unknownIds)
+			{
+				var sameText = new Filter
+				{
+					Must = { MatchKeyword("content_hash", c.ContentHash) }
+				};
+				var hits = (await client.ScrollAsync(
+					COLLECTION,
+					filter: sameText,
+					limit: 1,
+					payloadSelector: new[] { "last_updated" },
+					vectorsSelector: true
+				)).Result;
+
+				PointStruct point;
+				if (hits.Count > 0) // same text, new address: copy the vector, keep its last_updated
+				{
+					point = new PointStruct
+					{
+						Id = new PointId { Uuid = c.PointId },
+						Vectors = hits[0].Vectors.Vector.GetDenseVector()!.Data.ToArray(),
+						Payload = { Payload(c, hits[0].Payload["last_updated"].StringValue) },
+					};
+					reused++;
+				}
+				else // genuinely new content: embed and insert
+				{
+					point = new PointStruct
+					{
+						Id = new PointId { Uuid = c.PointId },
+						Vectors = new Document { Text = c.Text, Model = MODEL },
+						Payload = { Payload(c) },
+					};
+					added++;
+				}
+
+				await client.UpsertAsync(COLLECTION, points: new List<PointStruct> { point }, wait: true);
+			}
+
+			return (reused, added);
+		}
+		// @block-end reuse-or-add
+
+		// @block-start delete-gone
+		// Remove every point the current crawl no longer contains. Returns how many.
+		async Task<ulong> DeleteGone(Dictionary<string, Chunk> incomingIds)
+		{
+			if (incomingIds.Count == 0)
+				throw new ArgumentException("Refusing to delete from an empty source snapshot.");
+
+			var stale = new Filter
+			{
+				MustNot = { HasId(incomingIds.Keys.Select(Guid.Parse).ToList()) }
+			};
+
+			var toDelete = await client.CountAsync(COLLECTION, filter: stale);
+
+			// potential check against a threshold to avoid accidental mass deletion could be added here
+			await client.DeleteAsync(COLLECTION, filter: stale, wait: true);
+			return toDelete;
+		}
+		// @block-end delete-gone
+
+		// @block-start sync
+		async Task<Dictionary<string, long>> Sync(List<Chunk> latestChunks)
+		{
+			await CheckGate(); // refuse to mix embedding models or pipeline versions
+
+			var chunks = PrepareChunksForSync(latestChunks);
+			var (incomingIds, unchanged, contentChanged, unknownIds) = await SplitByState(chunks);
+
+			await ReEmbedChanged(contentChanged);
+			var (reused, added) = await ReuseOrAdd(unknownIds);
+			var deleted = await DeleteGone(incomingIds);
+
+			return new Dictionary<string, long>
+			{
+				["unchanged"] = unchanged.Count,
+				["re-embedded"] = contentChanged.Count,
+				["reused_embedding"] = reused,
+				["added"] = added,
+				["deleted"] = (long)deleted,
+			};
+		}
+		// @block-end sync
+
+		// @block-start run-sync
+		var run = await Sync(LATEST_CHUNKS);
+		foreach (var (op, count) in run)
+			Console.WriteLine($"{op}: {count}");
+		// @block-end run-sync
+	}
+
+}

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/csharp.md

@@ -0,0 +1,13 @@
+```csharp
+async Task CheckGate()
+{
+	// compare this pipeline's constants against what the collection records about itself
+	var meta = (await client.GetCollectionInfoAsync(COLLECTION)).Config.Metadata;
+	var model = meta.GetValueOrDefault("embedding_model")?.StringValue;
+	var pipeline = meta.GetValueOrDefault("pipeline_version")?.StringValue;
+
+	if (model != MODEL || pipeline != PIPELINE)
+		throw new InvalidOperationException(
+			$"collection was built by {model}/{pipeline}: full re-embed into a fresh collection required");
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/go.md

@@ -0,0 +1,11 @@
+```go
+checkGate := func() {
+	// compare this pipeline's constants against what the collection records about itself
+	info, err := client.GetCollectionInfo(context.Background(), COLLECTION)
+	meta := info.GetConfig().GetMetadata()
+
+	if meta["embedding_model"].GetStringValue() != MODEL || meta["pipeline_version"].GetStringValue() != PIPELINE {
+		panic(fmt.Sprintf("collection was built by %v: full re-embed into a fresh collection required", meta))
+	}
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/java.md

@@ -0,0 +1,15 @@
+```java
+static void checkGate() throws Exception {
+    // compare this pipeline's constants against what the collection records about itself
+    Map<String, Value> meta =
+        client.getCollectionInfoAsync(COLLECTION).get().getConfig().getMetadataMap();
+
+    Value model = meta.get("embedding_model");
+    Value pipeline = meta.get("pipeline_version");
+    if (model == null || !MODEL.equals(model.getStringValue())
+            || pipeline == null || !PIPELINE.equals(pipeline.getStringValue())) {
+        throw new RuntimeException(
+            "collection was built by " + meta + ": full re-embed into a fresh collection required");
+    }
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/python.md

@@ -0,0 +1,8 @@
+```python
+def check_gate():
+    # compare this pipeline's constants against what the collection records about itself
+    meta = client.get_collection(COLLECTION).config.metadata or {}
+
+    if meta.get("embedding_model") != MODEL or meta.get("pipeline_version") != PIPELINE:
+        raise RuntimeError(f"collection was built by {meta}: full re-embed into a fresh collection required")
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/rust.md

@@ -0,0 +1,22 @@
+```rust
+async fn check_gate(client: &Qdrant) -> anyhow::Result<()> {
+    // compare this pipeline's constants against what the collection records about itself
+    let meta = client
+        .collection_info(COLLECTION)
+        .await?
+        .result
+        .and_then(|info| info.config)
+        .map(|config| config.metadata)
+        .unwrap_or_default();
+
+    if meta.get("embedding_model").and_then(|v| v.as_str()).map(String::as_str) != Some(MODEL)
+        || meta.get("pipeline_version").and_then(|v| v.as_str()).map(String::as_str)
+            != Some(PIPELINE)
+    {
+        anyhow::bail!(
+            "collection was built by {meta:?}: full re-embed into a fresh collection required"
+        );
+    }
+    Ok(())
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/check-gate/typescript.md

@@ -0,0 +1,11 @@
+```typescript
+async function checkGate() {
+    // compare this pipeline's constants against what the collection records about itself
+    const meta = ((await client.getCollection(COLLECTION)).config.metadata ??
+        {}) as Record<string, unknown>;
+
+    if (meta.embedding_model !== MODEL || meta.pipeline_version !== PIPELINE) {
+        throw new Error(`collection was built by ${JSON.stringify(meta)}: full re-embed into a fresh collection required`);
+    }
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/csharp.md

@@ -0,0 +1,10 @@
+```csharp
+var QDRANT_URL = Environment.GetEnvironmentVariable("QDRANT_URL");
+var QDRANT_API_KEY = Environment.GetEnvironmentVariable("QDRANT_API_KEY");
+
+var client = new QdrantClient(
+	host: QDRANT_URL!,
+	https: true,
+	apiKey: QDRANT_API_KEY
+);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/go.md

@@ -0,0 +1,10 @@
+```go
+QDRANT_URL := os.Getenv("QDRANT_URL")
+QDRANT_API_KEY := os.Getenv("QDRANT_API_KEY")
+
+client, err := qdrant.NewClient(&qdrant.Config{
+	Host:   QDRANT_URL,
+	APIKey: QDRANT_API_KEY,
+	UseTLS: true,
+})
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/java.md

@@ -0,0 +1,10 @@
+```java
+static final String QDRANT_URL = System.getenv("QDRANT_URL");
+static final String QDRANT_API_KEY = System.getenv("QDRANT_API_KEY");
+
+static final QdrantClient client =
+    new QdrantClient(
+        QdrantGrpcClient.newBuilder(QDRANT_URL, 6334, true)
+            .withApiKey(QDRANT_API_KEY)
+            .build());
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/python.md

@@ -0,0 +1,14 @@
+```python
+import os
+
+from qdrant_client import QdrantClient, models
+
+QDRANT_URL = os.getenv("QDRANT_URL")
+QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")
+
+client = QdrantClient(
+    url=QDRANT_URL,
+    api_key=QDRANT_API_KEY,
+    cloud_inference=True
+)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/rust.md

@@ -0,0 +1,8 @@
+```rust
+let qdrant_url = std::env::var("QDRANT_URL")?;
+let qdrant_api_key = std::env::var("QDRANT_API_KEY")?;
+
+let client = Qdrant::from_url(&qdrant_url)
+    .api_key(qdrant_api_key)
+    .build()?;
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/client-connection/typescript.md

@@ -0,0 +1,11 @@
+```typescript
+import { QdrantClient, Schemas } from "@qdrant/js-client-rest";
+
+const QDRANT_URL = process.env.QDRANT_URL;
+const QDRANT_API_KEY = process.env.QDRANT_API_KEY;
+
+const client = new QdrantClient({
+    url: QDRANT_URL,
+    apiKey: QDRANT_API_KEY,
+});
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/csharp.md

@@ -0,0 +1,19 @@
+```csharp
+var MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+var PIPELINE = "docs-prep-pipeline-v1";
+var COLLECTION = "docs-sync-tutorial";
+
+await client.CreateCollectionAsync(
+	collectionName: COLLECTION,
+	vectorsConfig: new VectorParams
+	{
+		Size = 384, // all-MiniLM-L6-v2 output dimension
+		Distance = Distance.Cosine
+	},
+	metadata: new()
+	{
+		["embedding_model"] = MODEL,
+		["pipeline_version"] = PIPELINE
+	}
+);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/go.md

@@ -0,0 +1,17 @@
+```go
+MODEL := "sentence-transformers/all-MiniLM-L6-v2"
+PIPELINE := "docs-prep-pipeline-v1"
+COLLECTION := "docs-sync-tutorial"
+
+client.CreateCollection(context.Background(), &qdrant.CreateCollection{
+	CollectionName: COLLECTION,
+	VectorsConfig: qdrant.NewVectorsConfig(&qdrant.VectorParams{
+		Size:     384, // all-MiniLM-L6-v2 output dimension
+		Distance: qdrant.Distance_Cosine,
+	}),
+	Metadata: qdrant.NewValueMap(map[string]any{
+		"embedding_model":  MODEL,
+		"pipeline_version": PIPELINE,
+	}),
+})
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/java.md

@@ -0,0 +1,24 @@
+```java
+static final String MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+static final String PIPELINE = "docs-prep-pipeline-v1";
+static final String COLLECTION = "docs-sync-tutorial";
+
+static void createCollection() throws Exception {
+    client.createCollectionAsync(
+        CreateCollection.newBuilder()
+            .setCollectionName(COLLECTION)
+            .setVectorsConfig(
+                VectorsConfig.newBuilder()
+                    .setParams(
+                        VectorParams.newBuilder()
+                            .setSize(384) // all-MiniLM-L6-v2 output dimension
+                            .setDistance(Distance.Cosine)
+                            .build())
+                    .build())
+            .putAllMetadata(
+                Map.of(
+                    "embedding_model", value(MODEL),
+                    "pipeline_version", value(PIPELINE)))
+            .build()).get();
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/python.md

@@ -0,0 +1,14 @@
+```python
+MODEL = "sentence-transformers/all-MiniLM-L6-v2"
+PIPELINE = "docs-prep-pipeline-v1"
+COLLECTION = "docs-sync-tutorial"
+
+client.create_collection(
+    COLLECTION,
+    vectors_config=models.VectorParams(
+        size=384,  # all-MiniLM-L6-v2 output dimension
+        distance=models.Distance.COSINE,
+    ),
+    metadata={"embedding_model": MODEL, "pipeline_version": PIPELINE},
+)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/rust.md

@@ -0,0 +1,20 @@
+```rust
+const MODEL: &str = "sentence-transformers/all-MiniLM-L6-v2";
+const PIPELINE: &str = "docs-prep-pipeline-v1";
+const COLLECTION: &str = "docs-sync-tutorial";
+
+let mut metadata: HashMap<String, Value> = HashMap::new();
+metadata.insert("embedding_model".to_string(), json!(MODEL));
+metadata.insert("pipeline_version".to_string(), json!(PIPELINE));
+
+client
+    .create_collection(
+        CreateCollectionBuilder::new(COLLECTION)
+            .vectors_config(VectorParamsBuilder::new(
+                384, // all-MiniLM-L6-v2 output dimension
+                Distance::Cosine,
+            ))
+            .metadata(metadata),
+    )
+    .await?;
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/create-collection/typescript.md

@@ -0,0 +1,16 @@
+```typescript
+const MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+const PIPELINE = "docs-prep-pipeline-v1";
+const COLLECTION = "docs-sync-tutorial";
+
+await client.createCollection(COLLECTION, {
+    vectors: {
+        size: 384, // all-MiniLM-L6-v2 output dimension
+        distance: "Cosine",
+    },
+});
+
+await client.updateCollection(COLLECTION, {
+    metadata: { embedding_model: MODEL, pipeline_version: PIPELINE },
+});
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/csharp.md

@@ -0,0 +1,248 @@
+```csharp
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.RegularExpressions;
+using Qdrant.Client;
+using Qdrant.Client.Grpc;
+using static Qdrant.Client.Grpc.Conditions;
+using Chunk = (string Url, string Anchor, int ChunkNum, string Text, string SectionUrl, string ContentHash, string PointId);
+
+var QDRANT_URL = Environment.GetEnvironmentVariable("QDRANT_URL");
+var QDRANT_API_KEY = Environment.GetEnvironmentVariable("QDRANT_API_KEY");
+
+var client = new QdrantClient(
+	host: QDRANT_URL!,
+	https: true,
+	apiKey: QDRANT_API_KEY
+);
+
+var MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+var PIPELINE = "docs-prep-pipeline-v1";
+var COLLECTION = "docs-sync-tutorial";
+
+await client.CreateCollectionAsync(
+	collectionName: COLLECTION,
+	vectorsConfig: new VectorParams
+	{
+		Size = 384, // all-MiniLM-L6-v2 output dimension
+		Distance = Distance.Cosine
+	},
+	metadata: new()
+	{
+		["embedding_model"] = MODEL,
+		["pipeline_version"] = PIPELINE
+	}
+);
+
+async Task CheckGate()
+{
+	// compare this pipeline's constants against what the collection records about itself
+	var meta = (await client.GetCollectionInfoAsync(COLLECTION)).Config.Metadata;
+	var model = meta.GetValueOrDefault("embedding_model")?.StringValue;
+	var pipeline = meta.GetValueOrDefault("pipeline_version")?.StringValue;
+
+	if (model != MODEL || pipeline != PIPELINE)
+		throw new InvalidOperationException(
+			$"collection was built by {model}/{pipeline}: full re-embed into a fresh collection required");
+}
+
+string ContentHash(string text) =>
+	Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(text))).ToLowerInvariant();
+
+// Qdrant accepts any well-formed UUID as a point ID:
+// a Guid built from the first 16 bytes of the address hash, so the same address always yields the same ID
+string PointIdFor(string url, string anchor, int num) =>
+	new Guid(SHA256.HashData(Encoding.UTF8.GetBytes($"{url}#{anchor}::{num}")).AsSpan(0, 16)).ToString();
+
+// Derive both values (and the section address) for every raw chunk.
+List<Chunk> PrepareChunksForSync(List<Chunk> chunks)
+{
+	var prepared = new List<Chunk>();
+	foreach (var c in chunks)
+	{
+		var text = Normalize(c.Text);
+		prepared.Add(c with
+		{
+			Text = text,
+			SectionUrl = c.Anchor != "" ? $"{c.Url}#{c.Anchor}" : c.Url,
+			ContentHash = ContentHash(text),
+			PointId = PointIdFor(c.Url, c.Anchor, c.ChunkNum),
+		});
+	}
+	return prepared;
+}
+
+Dictionary<string, Value> Payload(Chunk chunk, string? lastUpdated = null) => new()
+{
+	["url"] = chunk.Url,
+	["anchor"] = chunk.Anchor,
+	["chunk_num"] = chunk.ChunkNum,
+	["section_url"] = chunk.SectionUrl,
+	["text"] = chunk.Text,
+	["content_hash"] = chunk.ContentHash,
+	["last_updated"] = lastUpdated ?? DateTimeOffset.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssK"),
+};
+
+foreach (var field in new[] { "content_hash", "url", "section_url" })
+	await client.CreatePayloadIndexAsync(COLLECTION, field, PayloadSchemaType.Keyword);
+
+await client.UpsertAsync(
+	collectionName: COLLECTION,
+	points: PrepareChunksForSync(CHUNKS).Select(c => new PointStruct
+	{
+		Id = new PointId { Uuid = c.PointId },
+		Vectors = new Document { Text = c.Text, Model = MODEL },
+		Payload = { Payload(c) },
+	}).ToList(),
+	wait: true
+);
+
+var QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+await client.QueryAsync(
+	collectionName: COLLECTION,
+	query: new Document { Text = QUERY, Model = MODEL },
+	limit: 3,
+	payloadSelector: new[] { "section_url", "text" }
+);
+
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async Task<(Dictionary<string, Chunk> incomingIds, List<Chunk> unchanged, List<Chunk> contentChanged, List<Chunk> unknownIds)>
+	SplitByState(List<Chunk> latestChunks)
+{
+	var incoming = latestChunks.ToDictionary(c => c.PointId);
+
+	var stored = new Dictionary<string, string>();
+	var points = await client.RetrieveAsync(
+		COLLECTION,
+		ids: incoming.Keys.Select(pid => new PointId { Uuid = pid }).ToList(),
+		payloadSelector: new[] { "content_hash" },
+		vectorSelector: false
+	);
+	foreach (var p in points)
+		stored[p.Id.Uuid] = p.Payload["content_hash"].StringValue;
+
+	var unchanged = new List<Chunk>();
+	var contentChanged = new List<Chunk>();
+	var unknownIds = new List<Chunk>();
+	foreach (var (pid, c) in incoming)
+	{
+		if (stored.TryGetValue(pid, out var hash) && hash == c.ContentHash)
+			unchanged.Add(c);
+		else if (stored.ContainsKey(pid))
+			contentChanged.Add(c);
+		else
+			unknownIds.Add(c);
+	}
+
+	return (incoming, unchanged, contentChanged, unknownIds);
+}
+
+var splitState = await SplitByState(LATEST_CHUNKS);
+
+async Task ReEmbedChanged(List<Chunk> contentChanged)
+{
+	if (contentChanged.Count == 0)
+		return;
+	await client.UpsertAsync(
+		collectionName: COLLECTION,
+		points: contentChanged.Select(c => new PointStruct
+		{
+			Id = new PointId { Uuid = c.PointId },
+			Vectors = new Document { Text = c.Text, Model = MODEL },
+			Payload = { Payload(c) },
+		}).ToList(),
+		wait: true
+	);
+}
+
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async Task<(int reused, int added)> ReuseOrAdd(List<Chunk> unknownIds)
+{
+	int reused = 0, added = 0;
+
+	foreach (var c in unknownIds)
+	{
+		var sameText = new Filter
+		{
+			Must = { MatchKeyword("content_hash", c.ContentHash) }
+		};
+		var hits = (await client.ScrollAsync(
+			COLLECTION,
+			filter: sameText,
+			limit: 1,
+			payloadSelector: new[] { "last_updated" },
+			vectorsSelector: true
+		)).Result;
+
+		PointStruct point;
+		if (hits.Count > 0) // same text, new address: copy the vector, keep its last_updated
+		{
+			point = new PointStruct
+			{
+				Id = new PointId { Uuid = c.PointId },
+				Vectors = hits[0].Vectors.Vector.GetDenseVector()!.Data.ToArray(),
+				Payload = { Payload(c, hits[0].Payload["last_updated"].StringValue) },
+			};
+			reused++;
+		}
+		else // genuinely new content: embed and insert
+		{
+			point = new PointStruct
+			{
+				Id = new PointId { Uuid = c.PointId },
+				Vectors = new Document { Text = c.Text, Model = MODEL },
+				Payload = { Payload(c) },
+			};
+			added++;
+		}
+
+		await client.UpsertAsync(COLLECTION, points: new List<PointStruct> { point }, wait: true);
+	}
+
+	return (reused, added);
+}
+
+// Remove every point the current crawl no longer contains. Returns how many.
+async Task<ulong> DeleteGone(Dictionary<string, Chunk> incomingIds)
+{
+	if (incomingIds.Count == 0)
+		throw new ArgumentException("Refusing to delete from an empty source snapshot.");
+
+	var stale = new Filter
+	{
+		MustNot = { HasId(incomingIds.Keys.Select(Guid.Parse).ToList()) }
+	};
+
+	var toDelete = await client.CountAsync(COLLECTION, filter: stale);
+
+	// potential check against a threshold to avoid accidental mass deletion could be added here
+	await client.DeleteAsync(COLLECTION, filter: stale, wait: true);
+	return toDelete;
+}
+
+async Task<Dictionary<string, long>> Sync(List<Chunk> latestChunks)
+{
+	await CheckGate(); // refuse to mix embedding models or pipeline versions
+
+	var chunks = PrepareChunksForSync(latestChunks);
+	var (incomingIds, unchanged, contentChanged, unknownIds) = await SplitByState(chunks);
+
+	await ReEmbedChanged(contentChanged);
+	var (reused, added) = await ReuseOrAdd(unknownIds);
+	var deleted = await DeleteGone(incomingIds);
+
+	return new Dictionary<string, long>
+	{
+		["unchanged"] = unchanged.Count,
+		["re-embedded"] = contentChanged.Count,
+		["reused_embedding"] = reused,
+		["added"] = added,
+		["deleted"] = (long)deleted,
+	};
+}
+
+var run = await Sync(LATEST_CHUNKS);
+foreach (var (op, count) in run)
+	Console.WriteLine($"{op}: {count}");
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/csharp.md

@@ -0,0 +1,19 @@
+```csharp
+// Remove every point the current crawl no longer contains. Returns how many.
+async Task<ulong> DeleteGone(Dictionary<string, Chunk> incomingIds)
+{
+	if (incomingIds.Count == 0)
+		throw new ArgumentException("Refusing to delete from an empty source snapshot.");
+
+	var stale = new Filter
+	{
+		MustNot = { HasId(incomingIds.Keys.Select(Guid.Parse).ToList()) }
+	};
+
+	var toDelete = await client.CountAsync(COLLECTION, filter: stale);
+
+	// potential check against a threshold to avoid accidental mass deletion could be added here
+	await client.DeleteAsync(COLLECTION, filter: stale, wait: true);
+	return toDelete;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/go.md

@@ -0,0 +1,29 @@
+```go
+// remove every point the current crawl no longer contains, return how many
+deleteGone := func(incomingIDs map[string]Chunk) int {
+	if len(incomingIDs) == 0 {
+		panic("Refusing to delete from an empty source snapshot.")
+	}
+
+	ids := make([]*qdrant.PointId, 0, len(incomingIDs))
+	for pid := range incomingIDs {
+		ids = append(ids, qdrant.NewID(pid))
+	}
+	stale := &qdrant.Filter{
+		MustNot: []*qdrant.Condition{qdrant.NewHasID(ids...)},
+	}
+
+	toDelete, err := client.Count(context.Background(), &qdrant.CountPoints{
+		CollectionName: COLLECTION,
+		Filter:         stale,
+	})
+
+	// potential check against a threshold to avoid accidental mass deletion could be added here
+	client.Delete(context.Background(), &qdrant.DeletePoints{
+		CollectionName: COLLECTION,
+		Points:         qdrant.NewPointsSelectorFilter(stale),
+		Wait:           qdrant.PtrOf(true),
+	})
+	return int(toDelete)
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/java.md

@@ -0,0 +1,21 @@
+```java
+// Remove every point the current crawl no longer contains. Returns how many.
+static long deleteGone(Map<String, Chunk> incomingIds) throws Exception {
+    if (incomingIds.isEmpty()) {
+        throw new IllegalArgumentException("Refusing to delete from an empty source snapshot.");
+    }
+
+    Filter stale = Filter.newBuilder()
+        .addMustNot(hasId(
+            incomingIds.keySet().stream()
+                .map(pid -> id(UUID.fromString(pid)))
+                .collect(Collectors.toList())))
+        .build();
+
+    long toDelete = client.countAsync(COLLECTION, stale, true).get();
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    client.deleteAsync(COLLECTION, stale).get();
+    return toDelete;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/python.md

@@ -0,0 +1,14 @@
+```python
+def delete_gone(incoming_ids):
+    """Remove every point the current crawl no longer contains. Returns how many."""
+    if not incoming_ids:
+        raise ValueError("Refusing to delete from an empty source snapshot.")
+
+    stale = models.Filter(must_not=[models.HasIdCondition(has_id=list(incoming_ids))])
+
+    to_delete = client.count(COLLECTION, count_filter=stale).count
+
+    # potential check against a threshold to avoid accidental mass deletion could be added here
+    client.delete(COLLECTION, points_selector=models.FilterSelector(filter=stale), wait=True)
+    return to_delete
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/rust.md

@@ -0,0 +1,28 @@
+```rust
+/// Remove every point the current crawl no longer contains. Returns how many.
+async fn delete_gone(
+    client: &Qdrant,
+    incoming_ids: &HashMap<String, Chunk>,
+) -> anyhow::Result<u64> {
+    if incoming_ids.is_empty() {
+        anyhow::bail!("Refusing to delete from an empty source snapshot.");
+    }
+
+    let stale = Filter::must_not([Condition::has_id(
+        incoming_ids.keys().map(|id| PointId::from(id.as_str())),
+    )]);
+
+    let to_delete = client
+        .count(CountPointsBuilder::new(COLLECTION).filter(stale.clone()))
+        .await?
+        .result
+        .map(|r| r.count)
+        .unwrap_or(0);
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    client
+        .delete_points(DeletePointsBuilder::new(COLLECTION).points(stale).wait(true))
+        .await?;
+    Ok(to_delete)
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/delete-gone/typescript.md

@@ -0,0 +1,16 @@
+```typescript
+// Remove every point the current crawl no longer contains. Returns how many.
+async function deleteGone(incoming: Map<string, SyncChunk>) {
+    if (incoming.size === 0) {
+        throw new Error("Refusing to delete from an empty source snapshot.");
+    }
+
+    const stale = { must_not: [{ has_id: [...incoming.keys()] }] };
+
+    const toDelete = (await client.count(COLLECTION, { filter: stale })).count;
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    await client.delete(COLLECTION, { filter: stale, wait: true });
+    return toDelete;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/go.md

@@ -0,0 +1,276 @@
+```go
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/qdrant/go-client/qdrant"
+)
+
+QDRANT_URL := os.Getenv("QDRANT_URL")
+QDRANT_API_KEY := os.Getenv("QDRANT_API_KEY")
+
+client, err := qdrant.NewClient(&qdrant.Config{
+	Host:   QDRANT_URL,
+	APIKey: QDRANT_API_KEY,
+	UseTLS: true,
+})
+
+MODEL := "sentence-transformers/all-MiniLM-L6-v2"
+PIPELINE := "docs-prep-pipeline-v1"
+COLLECTION := "docs-sync-tutorial"
+
+client.CreateCollection(context.Background(), &qdrant.CreateCollection{
+	CollectionName: COLLECTION,
+	VectorsConfig: qdrant.NewVectorsConfig(&qdrant.VectorParams{
+		Size:     384, // all-MiniLM-L6-v2 output dimension
+		Distance: qdrant.Distance_Cosine,
+	}),
+	Metadata: qdrant.NewValueMap(map[string]any{
+		"embedding_model":  MODEL,
+		"pipeline_version": PIPELINE,
+	}),
+})
+
+checkGate := func() {
+	// compare this pipeline's constants against what the collection records about itself
+	info, err := client.GetCollectionInfo(context.Background(), COLLECTION)
+	meta := info.GetConfig().GetMetadata()
+
+	if meta["embedding_model"].GetStringValue() != MODEL || meta["pipeline_version"].GetStringValue() != PIPELINE {
+		panic(fmt.Sprintf("collection was built by %v: full re-embed into a fresh collection required", meta))
+	}
+}
+
+contentHash := func(text string) string {
+	sum := sha256.Sum256([]byte(text))
+	return hex.EncodeToString(sum[:])
+}
+
+pointID := func(url, anchor string, num int) string {
+	// NewSHA1 with a namespace is UUIDv5; NameSpaceURL is a fixed constant it requires,
+	// marking the input as a URL-like name
+	return uuid.NewSHA1(uuid.NameSpaceURL, []byte(fmt.Sprintf("%s#%s::%d", url, anchor, num))).String()
+}
+
+// derive both values (and the section address) for every raw chunk
+prepareChunksForSync := func(chunks []Chunk) []Chunk {
+	out := make([]Chunk, 0, len(chunks))
+	for _, c := range chunks {
+		c.Text = normalize(c.Text)
+		c.SectionURL = c.URL
+		if c.Anchor != "" {
+			c.SectionURL = c.URL + "#" + c.Anchor
+		}
+		c.ContentHash = contentHash(c.Text)
+		c.PointID = pointID(c.URL, c.Anchor, c.ChunkNum)
+		out = append(out, c)
+	}
+	return out
+}
+
+payload := func(c Chunk, lastUpdated string) map[string]any {
+	if lastUpdated == "" {
+		lastUpdated = time.Now().UTC().Format(time.RFC3339)
+	}
+	return map[string]any{
+		"url":          c.URL,
+		"anchor":       c.Anchor,
+		"chunk_num":    c.ChunkNum,
+		"section_url":  c.SectionURL,
+		"text":         c.Text,
+		"content_hash": c.ContentHash,
+		"last_updated": lastUpdated,
+	}
+}
+
+for _, field := range []string{"content_hash", "url", "section_url"} {
+	client.CreateFieldIndex(context.Background(), &qdrant.CreateFieldIndexCollection{
+		CollectionName: COLLECTION,
+		FieldName:      field,
+		FieldType:      qdrant.FieldType_FieldTypeKeyword.Enum(),
+	})
+}
+
+var points []*qdrant.PointStruct
+for _, c := range prepareChunksForSync(CHUNKS) {
+	points = append(points, &qdrant.PointStruct{
+		Id: qdrant.NewID(c.PointID),
+
+		Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+		Payload: qdrant.NewValueMap(payload(c, "")),
+	})
+}
+client.Upsert(context.Background(), &qdrant.UpsertPoints{
+	CollectionName: COLLECTION,
+	Points:         points,
+	Wait:           qdrant.PtrOf(true),
+})
+
+QUERY := "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+client.Query(context.Background(), &qdrant.QueryPoints{
+	CollectionName: COLLECTION,
+	Query:          qdrant.NewQueryDocument(&qdrant.Document{Text: QUERY, Model: MODEL}),
+	Limit:          qdrant.PtrOf(uint64(3)),
+	WithPayload:    qdrant.NewWithPayloadInclude("section_url", "text"),
+})
+
+// compare the incoming chunk list to the collection: who is unchanged, changed, or unknown
+splitByState := func(latestChunks []Chunk) (map[string]Chunk, []Chunk, []Chunk, []Chunk) {
+	incoming := make(map[string]Chunk, len(latestChunks))
+	ids := make([]*qdrant.PointId, 0, len(latestChunks))
+	for _, c := range latestChunks {
+		incoming[c.PointID] = c
+		ids = append(ids, qdrant.NewID(c.PointID))
+	}
+
+	retrieved, err := client.Get(context.Background(), &qdrant.GetPoints{
+		CollectionName: COLLECTION,
+		Ids:            ids,
+		WithPayload:    qdrant.NewWithPayloadInclude("content_hash"),
+		WithVectors:    qdrant.NewWithVectors(false),
+	})
+	stored := make(map[string]string, len(retrieved))
+	for _, p := range retrieved {
+		stored[p.GetId().GetUuid()] = p.GetPayload()["content_hash"].GetStringValue()
+	}
+
+	var unchanged, contentChanged, unknownIDs []Chunk
+	for pid, c := range incoming {
+		storedHash, found := stored[pid]
+		switch {
+		case found && storedHash == c.ContentHash:
+			unchanged = append(unchanged, c)
+		case found:
+			contentChanged = append(contentChanged, c)
+		default:
+			unknownIDs = append(unknownIDs, c)
+		}
+	}
+
+	return incoming, unchanged, contentChanged, unknownIDs
+}
+
+incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(LATEST_CHUNKS)
+
+reEmbedChanged := func(contentChanged []Chunk) {
+	if len(contentChanged) == 0 {
+		return
+	}
+	points := make([]*qdrant.PointStruct, 0, len(contentChanged))
+	for _, c := range contentChanged {
+		points = append(points, &qdrant.PointStruct{
+			Id:      qdrant.NewID(c.PointID),
+			Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+			Payload: qdrant.NewValueMap(payload(c, "")),
+		})
+	}
+	client.Upsert(context.Background(), &qdrant.UpsertPoints{
+		CollectionName: COLLECTION,
+		Points:         points,
+		Wait:           qdrant.PtrOf(true),
+	})
+}
+
+// reuse an existing embedding when the same text is already stored; embed only what is new
+reuseOrAdd := func(unknownIDs []Chunk) (int, int) {
+	reused, added := 0, 0
+
+	for _, c := range unknownIDs {
+		sameText := &qdrant.Filter{
+			Must: []*qdrant.Condition{
+				qdrant.NewMatch("content_hash", c.ContentHash),
+			},
+		}
+		hits, err := client.Scroll(context.Background(), &qdrant.ScrollPoints{
+			CollectionName: COLLECTION,
+			Filter:         sameText,
+			Limit:          qdrant.PtrOf(uint32(1)),
+			WithPayload:    qdrant.NewWithPayloadInclude("last_updated"),
+			WithVectors:    qdrant.NewWithVectors(true),
+		})
+
+		var point *qdrant.PointStruct
+		if len(hits) > 0 { // same text, new address: copy the vector, keep its last_updated
+			point = &qdrant.PointStruct{
+				Id:      qdrant.NewID(c.PointID),
+				Vectors: qdrant.NewVectors(hits[0].GetVectors().GetVector().GetData()...),
+				Payload: qdrant.NewValueMap(payload(c, hits[0].GetPayload()["last_updated"].GetStringValue())),
+			}
+			reused++
+		} else { // genuinely new content: embed and insert
+			point = &qdrant.PointStruct{
+				Id:      qdrant.NewID(c.PointID),
+				Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+				Payload: qdrant.NewValueMap(payload(c, "")),
+			}
+			added++
+		}
+
+		client.Upsert(context.Background(), &qdrant.UpsertPoints{
+			CollectionName: COLLECTION,
+			Points:         []*qdrant.PointStruct{point},
+			Wait:           qdrant.PtrOf(true),
+		})
+	}
+
+	return reused, added
+}
+
+// remove every point the current crawl no longer contains, return how many
+deleteGone := func(incomingIDs map[string]Chunk) int {
+	if len(incomingIDs) == 0 {
+		panic("Refusing to delete from an empty source snapshot.")
+	}
+
+	ids := make([]*qdrant.PointId, 0, len(incomingIDs))
+	for pid := range incomingIDs {
+		ids = append(ids, qdrant.NewID(pid))
+	}
+	stale := &qdrant.Filter{
+		MustNot: []*qdrant.Condition{qdrant.NewHasID(ids...)},
+	}
+
+	toDelete, err := client.Count(context.Background(), &qdrant.CountPoints{
+		CollectionName: COLLECTION,
+		Filter:         stale,
+	})
+
+	// potential check against a threshold to avoid accidental mass deletion could be added here
+	client.Delete(context.Background(), &qdrant.DeletePoints{
+		CollectionName: COLLECTION,
+		Points:         qdrant.NewPointsSelectorFilter(stale),
+		Wait:           qdrant.PtrOf(true),
+	})
+	return int(toDelete)
+}
+
+sync := func(latestChunks []Chunk) map[string]int {
+	checkGate() // refuse to mix embedding models or pipeline versions
+
+	chunks := prepareChunksForSync(latestChunks)
+	incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(chunks)
+
+	reEmbedChanged(contentChanged)
+	reused, added := reuseOrAdd(unknownIDs)
+	deleted := deleteGone(incomingIDs)
+
+	return map[string]int{
+		"unchanged":        len(unchanged),
+		"re-embedded":      len(contentChanged),
+		"reused_embedding": reused,
+		"added":            added,
+		"deleted":          deleted,
+	}
+}
+
+run := sync(LATEST_CHUNKS)
+fmt.Println(run)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/csharp.md

@@ -0,0 +1,27 @@
+```csharp
+string ContentHash(string text) =>
+	Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(text))).ToLowerInvariant();
+
+// Qdrant accepts any well-formed UUID as a point ID:
+// a Guid built from the first 16 bytes of the address hash, so the same address always yields the same ID
+string PointIdFor(string url, string anchor, int num) =>
+	new Guid(SHA256.HashData(Encoding.UTF8.GetBytes($"{url}#{anchor}::{num}")).AsSpan(0, 16)).ToString();
+
+// Derive both values (and the section address) for every raw chunk.
+List<Chunk> PrepareChunksForSync(List<Chunk> chunks)
+{
+	var prepared = new List<Chunk>();
+	foreach (var c in chunks)
+	{
+		var text = Normalize(c.Text);
+		prepared.Add(c with
+		{
+			Text = text,
+			SectionUrl = c.Anchor != "" ? $"{c.Url}#{c.Anchor}" : c.Url,
+			ContentHash = ContentHash(text),
+			PointId = PointIdFor(c.Url, c.Anchor, c.ChunkNum),
+		});
+	}
+	return prepared;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/go.md

@@ -0,0 +1,28 @@
+```go
+contentHash := func(text string) string {
+	sum := sha256.Sum256([]byte(text))
+	return hex.EncodeToString(sum[:])
+}
+
+pointID := func(url, anchor string, num int) string {
+	// NewSHA1 with a namespace is UUIDv5; NameSpaceURL is a fixed constant it requires,
+	// marking the input as a URL-like name
+	return uuid.NewSHA1(uuid.NameSpaceURL, []byte(fmt.Sprintf("%s#%s::%d", url, anchor, num))).String()
+}
+
+// derive both values (and the section address) for every raw chunk
+prepareChunksForSync := func(chunks []Chunk) []Chunk {
+	out := make([]Chunk, 0, len(chunks))
+	for _, c := range chunks {
+		c.Text = normalize(c.Text)
+		c.SectionURL = c.URL
+		if c.Anchor != "" {
+			c.SectionURL = c.URL + "#" + c.Anchor
+		}
+		c.ContentHash = contentHash(c.Text)
+		c.PointID = pointID(c.URL, c.Anchor, c.ChunkNum)
+		out = append(out, c)
+	}
+	return out
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/java.md

@@ -0,0 +1,27 @@
+```java
+static String contentHash(String text) throws Exception {
+    byte[] digest = MessageDigest.getInstance("SHA-256")
+        .digest(text.getBytes(StandardCharsets.UTF_8));
+    return String.format("%064x", new BigInteger(1, digest));
+}
+
+static String pointId(String url, String anchor, int num) {
+    // name-based UUID (version 3); the same address always yields the same ID
+    return UUID.nameUUIDFromBytes(
+        (url + "#" + anchor + "::" + num).getBytes(StandardCharsets.UTF_8)).toString();
+}
+
+// Derive both values (and the section address) for every raw chunk.
+static List<Chunk> prepareChunksForSync(List<Chunk> chunks) throws Exception {
+    List<Chunk> out = new ArrayList<>();
+    for (Chunk c : chunks) {
+        String text = normalize(c.text);
+        Chunk prepared = new Chunk(c.url, c.anchor, c.chunkNum, text);
+        prepared.sectionUrl = !c.anchor.isEmpty() ? c.url + "#" + c.anchor : c.url;
+        prepared.contentHash = contentHash(text);
+        prepared.pointId = pointId(c.url, c.anchor, c.chunkNum);
+        out.add(prepared);
+    }
+    return out;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/python.md

@@ -0,0 +1,26 @@
+```python
+import hashlib
+import uuid
+from datetime import datetime, timezone
+
+def content_hash(text):
+    return hashlib.sha256(text.encode()).hexdigest()
+
+def point_id(url, anchor, num):
+    # NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+    return str(uuid.uuid5(uuid.NAMESPACE_URL, f"{url}#{anchor}::{num}"))
+
+def prepare_chunks_for_sync(chunks):
+    """Derive both values (and the section address) for every raw chunk."""
+    out = []
+    for c in chunks:
+        text = normalize(c["text"])
+        out.append({
+            **c,
+            "text": text,
+            "section_url": f"{c['url']}#{c['anchor']}" if c["anchor"] else c["url"],
+            "content_hash": content_hash(text),
+            "point_id": point_id(c["url"], c["anchor"], c["chunk_num"]),
+        })
+    return out
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/rust.md

@@ -0,0 +1,38 @@
+```rust
+fn content_hash(text: &str) -> String {
+    Sha256::digest(text.as_bytes())
+        .iter()
+        .map(|byte| format!("{byte:02x}"))
+        .collect()
+}
+
+fn point_id(url: &str, anchor: &str, num: u32) -> String {
+    // NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+    uuid::Uuid::new_v5(
+        &uuid::Uuid::NAMESPACE_URL,
+        format!("{url}#{anchor}::{num}").as_bytes(),
+    )
+    .to_string()
+}
+
+/// Derive both values (and the section address) for every raw chunk.
+fn prepare_chunks_for_sync(chunks: &[Chunk]) -> Vec<Chunk> {
+    chunks
+        .iter()
+        .map(|c| {
+            let text = normalize(&c.text);
+            Chunk {
+                text: text.clone(),
+                section_url: if c.anchor.is_empty() {
+                    c.url.clone()
+                } else {
+                    format!("{}#{}", c.url, c.anchor)
+                },
+                content_hash: content_hash(&text),
+                point_id: point_id(&c.url, &c.anchor, c.chunk_num),
+                ..c.clone()
+            }
+        })
+        .collect()
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/identity-and-fingerprint/typescript.md

@@ -0,0 +1,32 @@
+```typescript
+import { createHash } from "node:crypto";
+
+type RawChunk = { url: string; anchor: string; chunk_num: number; text: string };
+type SyncChunk = RawChunk & { section_url: string; content_hash: string; point_id: string };
+
+function contentHash(text: string): string {
+    return createHash("sha256").update(text).digest("hex");
+}
+
+// NAMESPACE_URL is a fixed constant name-based (v5) UUIDs require; it marks the input as a URL-like name
+function pointId(url: string, anchor: string, num: number): string {
+    // Qdrant accepts any well-formed UUID as a point ID:
+    // hash the address, format the digest as a UUID, and the same address always yields the same ID
+    const hex = createHash("sha256").update(`${url}#${anchor}::${num}`).digest("hex");
+    return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20, 32)}`;
+}
+
+// Derive both values (and the section address) for every raw chunk.
+function prepareChunksForSync(chunks: RawChunk[]): SyncChunk[] {
+    return chunks.map((c) => {
+        const text = normalize(c.text);
+        return {
+            ...c,
+            text,
+            section_url: c.anchor ? `${c.url}#${c.anchor}` : c.url,
+            content_hash: contentHash(text),
+            point_id: pointId(c.url, c.anchor, c.chunk_num),
+        };
+    });
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/java.md

@@ -0,0 +1,328 @@
+```java
+import static io.qdrant.client.ConditionFactory.hasId;
+import static io.qdrant.client.ConditionFactory.matchKeyword;
+import static io.qdrant.client.PointIdFactory.id;
+import static io.qdrant.client.QueryFactory.nearest;
+import static io.qdrant.client.ValueFactory.value;
+import static io.qdrant.client.VectorFactory.vector;
+import static io.qdrant.client.VectorsFactory.vectors;
+
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+import io.qdrant.client.VectorOutputHelper;
+import io.qdrant.client.WithPayloadSelectorFactory;
+import io.qdrant.client.WithVectorsSelectorFactory;
+import io.qdrant.client.grpc.Collections.CreateCollection;
+import io.qdrant.client.grpc.Collections.Distance;
+import io.qdrant.client.grpc.Collections.PayloadSchemaType;
+import io.qdrant.client.grpc.Collections.VectorParams;
+import io.qdrant.client.grpc.Collections.VectorsConfig;
+import io.qdrant.client.grpc.Common.Filter;
+import io.qdrant.client.grpc.JsonWithInt.Value;
+import io.qdrant.client.grpc.Points.Document;
+import io.qdrant.client.grpc.Points.PointStruct;
+import io.qdrant.client.grpc.Points.QueryPoints;
+import io.qdrant.client.grpc.Points.ScrollPoints;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+static final String QDRANT_URL = System.getenv("QDRANT_URL");
+static final String QDRANT_API_KEY = System.getenv("QDRANT_API_KEY");
+
+static final QdrantClient client =
+    new QdrantClient(
+        QdrantGrpcClient.newBuilder(QDRANT_URL, 6334, true)
+            .withApiKey(QDRANT_API_KEY)
+            .build());
+
+static final String MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+static final String PIPELINE = "docs-prep-pipeline-v1";
+static final String COLLECTION = "docs-sync-tutorial";
+
+static void createCollection() throws Exception {
+    client.createCollectionAsync(
+        CreateCollection.newBuilder()
+            .setCollectionName(COLLECTION)
+            .setVectorsConfig(
+                VectorsConfig.newBuilder()
+                    .setParams(
+                        VectorParams.newBuilder()
+                            .setSize(384) // all-MiniLM-L6-v2 output dimension
+                            .setDistance(Distance.Cosine)
+                            .build())
+                    .build())
+            .putAllMetadata(
+                Map.of(
+                    "embedding_model", value(MODEL),
+                    "pipeline_version", value(PIPELINE)))
+            .build()).get();
+}
+
+static void checkGate() throws Exception {
+    // compare this pipeline's constants against what the collection records about itself
+    Map<String, Value> meta =
+        client.getCollectionInfoAsync(COLLECTION).get().getConfig().getMetadataMap();
+
+    Value model = meta.get("embedding_model");
+    Value pipeline = meta.get("pipeline_version");
+    if (model == null || !MODEL.equals(model.getStringValue())
+            || pipeline == null || !PIPELINE.equals(pipeline.getStringValue())) {
+        throw new RuntimeException(
+            "collection was built by " + meta + ": full re-embed into a fresh collection required");
+    }
+}
+
+static String contentHash(String text) throws Exception {
+    byte[] digest = MessageDigest.getInstance("SHA-256")
+        .digest(text.getBytes(StandardCharsets.UTF_8));
+    return String.format("%064x", new BigInteger(1, digest));
+}
+
+static String pointId(String url, String anchor, int num) {
+    // name-based UUID (version 3); the same address always yields the same ID
+    return UUID.nameUUIDFromBytes(
+        (url + "#" + anchor + "::" + num).getBytes(StandardCharsets.UTF_8)).toString();
+}
+
+// Derive both values (and the section address) for every raw chunk.
+static List<Chunk> prepareChunksForSync(List<Chunk> chunks) throws Exception {
+    List<Chunk> out = new ArrayList<>();
+    for (Chunk c : chunks) {
+        String text = normalize(c.text);
+        Chunk prepared = new Chunk(c.url, c.anchor, c.chunkNum, text);
+        prepared.sectionUrl = !c.anchor.isEmpty() ? c.url + "#" + c.anchor : c.url;
+        prepared.contentHash = contentHash(text);
+        prepared.pointId = pointId(c.url, c.anchor, c.chunkNum);
+        out.add(prepared);
+    }
+    return out;
+}
+
+static Map<String, Value> payload(Chunk chunk, String lastUpdated) {
+    Map<String, Value> p = new HashMap<>();
+    p.put("url", value(chunk.url));
+    p.put("anchor", value(chunk.anchor));
+    p.put("chunk_num", value(chunk.chunkNum));
+    p.put("section_url", value(chunk.sectionUrl));
+    p.put("text", value(chunk.text));
+    p.put("content_hash", value(chunk.contentHash));
+    p.put("last_updated", value(lastUpdated != null
+        ? lastUpdated
+        : OffsetDateTime.now(ZoneOffset.UTC).truncatedTo(ChronoUnit.SECONDS).toString()));
+    return p;
+}
+
+static void createPayloadIndexes() throws Exception {
+    for (String field : List.of("content_hash", "url", "section_url")) {
+        client.createPayloadIndexAsync(
+            COLLECTION, field, PayloadSchemaType.Keyword, null, null, null, null).get();
+    }
+}
+
+static void populate() throws Exception {
+    List<PointStruct> points = new ArrayList<>();
+    for (Chunk c : prepareChunksForSync(CHUNKS)) {
+        points.add(
+            PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build());
+    }
+    client.upsertAsync(COLLECTION, points).get();
+}
+
+static final String QUERY =
+    "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+static void search() throws Exception {
+    client.queryAsync(
+        QueryPoints.newBuilder()
+            .setCollectionName(COLLECTION)
+            .setQuery(
+                nearest(
+                    Document.newBuilder()
+                        .setText(QUERY)
+                        .setModel(MODEL)
+                        .build()))
+            .setLimit(3)
+            .setWithPayload(WithPayloadSelectorFactory.include(List.of("section_url", "text")))
+            .build()).get();
+}
+
+static class SyncState {
+    Map<String, Chunk> incoming = new LinkedHashMap<>();
+    List<Chunk> unchanged = new ArrayList<>();
+    List<Chunk> contentChanged = new ArrayList<>();
+    List<Chunk> unknownIds = new ArrayList<>();
+}
+
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+static SyncState splitByState(List<Chunk> latestChunks) throws Exception {
+    SyncState state = new SyncState();
+    for (Chunk c : latestChunks) {
+        state.incoming.put(c.pointId, c);
+    }
+
+    Map<String, String> stored = new HashMap<>();
+    var points = client.retrieveAsync(
+        COLLECTION,
+        state.incoming.keySet().stream()
+            .map(pid -> id(UUID.fromString(pid)))
+            .collect(Collectors.toList()),
+        WithPayloadSelectorFactory.include(List.of("content_hash")),
+        WithVectorsSelectorFactory.enable(false),
+        null).get();
+    for (var p : points) {
+        stored.put(p.getId().getUuid(), p.getPayloadMap().get("content_hash").getStringValue());
+    }
+
+    for (Map.Entry<String, Chunk> e : state.incoming.entrySet()) {
+        String pid = e.getKey();
+        Chunk c = e.getValue();
+        if (c.contentHash.equals(stored.get(pid))) {
+            state.unchanged.add(c);
+        } else if (stored.containsKey(pid)) {
+            state.contentChanged.add(c);
+        } else {
+            state.unknownIds.add(c);
+        }
+    }
+
+    return state;
+}
+
+static void reEmbedChanged(List<Chunk> contentChanged) throws Exception {
+    if (contentChanged.isEmpty()) {
+        return;
+    }
+    List<PointStruct> points = new ArrayList<>();
+    for (Chunk c : contentChanged) {
+        points.add(
+            PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build());
+    }
+    client.upsertAsync(COLLECTION, points).get();
+}
+
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+static int[] reuseOrAdd(List<Chunk> unknownIds) throws Exception {
+    int reused = 0;
+    int added = 0;
+
+    for (Chunk c : unknownIds) {
+        Filter sameText = Filter.newBuilder()
+            .addMust(matchKeyword("content_hash", c.contentHash))
+            .build();
+
+        var hits = client.scrollAsync(
+            ScrollPoints.newBuilder()
+                .setCollectionName(COLLECTION)
+                .setFilter(sameText)
+                .setLimit(1)
+                .setWithPayload(WithPayloadSelectorFactory.include(List.of("last_updated")))
+                .setWithVectors(WithVectorsSelectorFactory.enable(true))
+                .build()).get().getResultList();
+
+        PointStruct point;
+        if (!hits.isEmpty()) { // same text, new address: copy the vector, keep its last_updated
+            point = PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(vectors(vector(
+                    VectorOutputHelper.getDenseVector(hits.get(0).getVectors().getVector())
+                        .getDataList())))
+                .putAllPayload(
+                    payload(c, hits.get(0).getPayloadMap().get("last_updated").getStringValue()))
+                .build();
+            reused++;
+        } else { // genuinely new content: embed and insert
+            point = PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build();
+            added++;
+        }
+
+        client.upsertAsync(COLLECTION, List.of(point)).get();
+    }
+
+    return new int[] {reused, added};
+}
+
+// Remove every point the current crawl no longer contains. Returns how many.
+static long deleteGone(Map<String, Chunk> incomingIds) throws Exception {
+    if (incomingIds.isEmpty()) {
+        throw new IllegalArgumentException("Refusing to delete from an empty source snapshot.");
+    }
+
+    Filter stale = Filter.newBuilder()
+        .addMustNot(hasId(
+            incomingIds.keySet().stream()
+                .map(pid -> id(UUID.fromString(pid)))
+                .collect(Collectors.toList())))
+        .build();
+
+    long toDelete = client.countAsync(COLLECTION, stale, true).get();
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    client.deleteAsync(COLLECTION, stale).get();
+    return toDelete;
+}
+
+static Map<String, Long> sync(List<Chunk> latestChunks) throws Exception {
+    checkGate(); // refuse to mix embedding models or pipeline versions
+
+    List<Chunk> chunks = prepareChunksForSync(latestChunks);
+    SyncState state = splitByState(chunks);
+
+    reEmbedChanged(state.contentChanged);
+    int[] reusedAdded = reuseOrAdd(state.unknownIds); // {reused, added}
+    long deleted = deleteGone(state.incoming);
+
+    return Map.of(
+        "unchanged", (long) state.unchanged.size(),
+        "re-embedded", (long) state.contentChanged.size(),
+        "reused_embedding", (long) reusedAdded[0],
+        "added", (long) reusedAdded[1],
+        "deleted", deleted);
+}
+
+static void runSync() throws Exception {
+    Map<String, Long> run = sync(LATEST_CHUNKS);
+    System.out.println(run);
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/csharp.md

@@ -0,0 +1,4 @@
+```csharp
+foreach (var field in new[] { "content_hash", "url", "section_url" })
+	await client.CreatePayloadIndexAsync(COLLECTION, field, PayloadSchemaType.Keyword);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/go.md

@@ -0,0 +1,9 @@
+```go
+for _, field := range []string{"content_hash", "url", "section_url"} {
+	client.CreateFieldIndex(context.Background(), &qdrant.CreateFieldIndexCollection{
+		CollectionName: COLLECTION,
+		FieldName:      field,
+		FieldType:      qdrant.FieldType_FieldTypeKeyword.Enum(),
+	})
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/java.md

@@ -0,0 +1,8 @@
+```java
+static void createPayloadIndexes() throws Exception {
+    for (String field : List.of("content_hash", "url", "section_url")) {
+        client.createPayloadIndexAsync(
+            COLLECTION, field, PayloadSchemaType.Keyword, null, null, null, null).get();
+    }
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/python.md

@@ -0,0 +1,4 @@
+```python
+for field in ("content_hash", "url", "section_url"):
+    client.create_payload_index(COLLECTION, field, models.PayloadSchemaType.KEYWORD)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/rust.md

@@ -0,0 +1,11 @@
+```rust
+for field in ["content_hash", "url", "section_url"] {
+    client
+        .create_field_index(CreateFieldIndexCollectionBuilder::new(
+            COLLECTION,
+            field,
+            FieldType::Keyword,
+        ))
+        .await?;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload-indexes/typescript.md

@@ -0,0 +1,8 @@
+```typescript
+for (const field of ["content_hash", "url", "section_url"]) {
+    await client.createPayloadIndex(COLLECTION, {
+        field_name: field,
+        field_schema: "keyword",
+    });
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/csharp.md

@@ -0,0 +1,12 @@
+```csharp
+Dictionary<string, Value> Payload(Chunk chunk, string? lastUpdated = null) => new()
+{
+	["url"] = chunk.Url,
+	["anchor"] = chunk.Anchor,
+	["chunk_num"] = chunk.ChunkNum,
+	["section_url"] = chunk.SectionUrl,
+	["text"] = chunk.Text,
+	["content_hash"] = chunk.ContentHash,
+	["last_updated"] = lastUpdated ?? DateTimeOffset.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssK"),
+};
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/go.md

@@ -0,0 +1,16 @@
+```go
+payload := func(c Chunk, lastUpdated string) map[string]any {
+	if lastUpdated == "" {
+		lastUpdated = time.Now().UTC().Format(time.RFC3339)
+	}
+	return map[string]any{
+		"url":          c.URL,
+		"anchor":       c.Anchor,
+		"chunk_num":    c.ChunkNum,
+		"section_url":  c.SectionURL,
+		"text":         c.Text,
+		"content_hash": c.ContentHash,
+		"last_updated": lastUpdated,
+	}
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/java.md

@@ -0,0 +1,15 @@
+```java
+static Map<String, Value> payload(Chunk chunk, String lastUpdated) {
+    Map<String, Value> p = new HashMap<>();
+    p.put("url", value(chunk.url));
+    p.put("anchor", value(chunk.anchor));
+    p.put("chunk_num", value(chunk.chunkNum));
+    p.put("section_url", value(chunk.sectionUrl));
+    p.put("text", value(chunk.text));
+    p.put("content_hash", value(chunk.contentHash));
+    p.put("last_updated", value(lastUpdated != null
+        ? lastUpdated
+        : OffsetDateTime.now(ZoneOffset.UTC).truncatedTo(ChronoUnit.SECONDS).toString()));
+    return p;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/python.md

@@ -0,0 +1,12 @@
+```python
+def payload(chunk, last_updated=None):
+    return {
+        "url": chunk["url"],
+        "anchor": chunk["anchor"],
+        "chunk_num": chunk["chunk_num"],
+        "section_url": chunk["section_url"],
+        "text": chunk["text"],
+        "content_hash": chunk["content_hash"],
+        "last_updated": last_updated or datetime.now(timezone.utc).isoformat(timespec="seconds"),
+    }
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/rust.md

@@ -0,0 +1,16 @@
+```rust
+fn payload(chunk: &Chunk, last_updated: Option<String>) -> anyhow::Result<Payload> {
+    let last_updated = last_updated.unwrap_or_else(|| {
+        chrono::Utc::now().to_rfc3339_opts(chrono::SecondsFormat::Secs, false)
+    });
+    Ok(Payload::try_from(serde_json::json!({
+        "url": chunk.url,
+        "anchor": chunk.anchor,
+        "chunk_num": chunk.chunk_num,
+        "section_url": chunk.section_url,
+        "text": chunk.text,
+        "content_hash": chunk.content_hash,
+        "last_updated": last_updated,
+    }))?)
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/payload/typescript.md

@@ -0,0 +1,13 @@
+```typescript
+function payload(chunk: SyncChunk, lastUpdated?: string) {
+    return {
+        url: chunk.url,
+        anchor: chunk.anchor,
+        chunk_num: chunk.chunk_num,
+        section_url: chunk.section_url,
+        text: chunk.text,
+        content_hash: chunk.content_hash,
+        last_updated: lastUpdated ?? new Date().toISOString().replace(/\.\d+Z$/, "Z"),
+    };
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/csharp.md

@@ -0,0 +1,12 @@
+```csharp
+await client.UpsertAsync(
+	collectionName: COLLECTION,
+	points: PrepareChunksForSync(CHUNKS).Select(c => new PointStruct
+	{
+		Id = new PointId { Uuid = c.PointId },
+		Vectors = new Document { Text = c.Text, Model = MODEL },
+		Payload = { Payload(c) },
+	}).ToList(),
+	wait: true
+);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/go.md

@@ -0,0 +1,16 @@
+```go
+var points []*qdrant.PointStruct
+for _, c := range prepareChunksForSync(CHUNKS) {
+	points = append(points, &qdrant.PointStruct{
+		Id: qdrant.NewID(c.PointID),
+
+		Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+		Payload: qdrant.NewValueMap(payload(c, "")),
+	})
+}
+client.Upsert(context.Background(), &qdrant.UpsertPoints{
+	CollectionName: COLLECTION,
+	Points:         points,
+	Wait:           qdrant.PtrOf(true),
+})
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/java.md

@@ -0,0 +1,21 @@
+```java
+static void populate() throws Exception {
+    List<PointStruct> points = new ArrayList<>();
+    for (Chunk c : prepareChunksForSync(CHUNKS)) {
+        points.add(
+            PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build());
+    }
+    client.upsertAsync(COLLECTION, points).get();
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/python.md

@@ -0,0 +1,10 @@
+```python
+client.upsert(COLLECTION, points=[
+    models.PointStruct(
+        id=c["point_id"],
+        vector=models.Document(text=c["text"], model=MODEL),
+        payload=payload(c),
+    )
+    for c in prepare_chunks_for_sync(CHUNKS)
+], wait=True)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/rust.md

@@ -0,0 +1,16 @@
+```rust
+let points: Vec<PointStruct> = prepare_chunks_for_sync(&chunks)
+    .iter()
+    .map(|c| {
+        Ok(PointStruct::new(
+            c.point_id.clone(),
+            Document::new(&c.text, MODEL),
+            payload(c, None)?,
+        ))
+    })
+    .collect::<anyhow::Result<_>>()?;
+
+client
+    .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+    .await?;
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/populate/typescript.md

@@ -0,0 +1,10 @@
+```typescript
+await client.upsert(COLLECTION, {
+    points: prepareChunksForSync(CHUNKS).map((c) => ({
+        id: c.point_id,
+        vector: { text: c.text, model: MODEL },
+        payload: payload(c),
+    })),
+    wait: true,
+});
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/python.md

@@ -0,0 +1,203 @@
+```python
+import os
+
+from qdrant_client import QdrantClient, models
+
+QDRANT_URL = os.getenv("QDRANT_URL")
+QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")
+
+client = QdrantClient(
+    url=QDRANT_URL,
+    api_key=QDRANT_API_KEY,
+    cloud_inference=True
+)
+
+MODEL = "sentence-transformers/all-MiniLM-L6-v2"
+PIPELINE = "docs-prep-pipeline-v1"
+COLLECTION = "docs-sync-tutorial"
+
+client.create_collection(
+    COLLECTION,
+    vectors_config=models.VectorParams(
+        size=384,  # all-MiniLM-L6-v2 output dimension
+        distance=models.Distance.COSINE,
+    ),
+    metadata={"embedding_model": MODEL, "pipeline_version": PIPELINE},
+)
+
+def check_gate():
+    # compare this pipeline's constants against what the collection records about itself
+    meta = client.get_collection(COLLECTION).config.metadata or {}
+
+    if meta.get("embedding_model") != MODEL or meta.get("pipeline_version") != PIPELINE:
+        raise RuntimeError(f"collection was built by {meta}: full re-embed into a fresh collection required")
+
+import hashlib
+import uuid
+from datetime import datetime, timezone
+
+def content_hash(text):
+    return hashlib.sha256(text.encode()).hexdigest()
+
+def point_id(url, anchor, num):
+    # NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+    return str(uuid.uuid5(uuid.NAMESPACE_URL, f"{url}#{anchor}::{num}"))
+
+def prepare_chunks_for_sync(chunks):
+    """Derive both values (and the section address) for every raw chunk."""
+    out = []
+    for c in chunks:
+        text = normalize(c["text"])
+        out.append({
+            **c,
+            "text": text,
+            "section_url": f"{c['url']}#{c['anchor']}" if c["anchor"] else c["url"],
+            "content_hash": content_hash(text),
+            "point_id": point_id(c["url"], c["anchor"], c["chunk_num"]),
+        })
+    return out
+
+def payload(chunk, last_updated=None):
+    return {
+        "url": chunk["url"],
+        "anchor": chunk["anchor"],
+        "chunk_num": chunk["chunk_num"],
+        "section_url": chunk["section_url"],
+        "text": chunk["text"],
+        "content_hash": chunk["content_hash"],
+        "last_updated": last_updated or datetime.now(timezone.utc).isoformat(timespec="seconds"),
+    }
+
+for field in ("content_hash", "url", "section_url"):
+    client.create_payload_index(COLLECTION, field, models.PayloadSchemaType.KEYWORD)
+
+client.upsert(COLLECTION, points=[
+    models.PointStruct(
+        id=c["point_id"],
+        vector=models.Document(text=c["text"], model=MODEL),
+        payload=payload(c),
+    )
+    for c in prepare_chunks_for_sync(CHUNKS)
+], wait=True)
+
+QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+client.query_points(
+    COLLECTION,
+    query=models.Document(text=QUERY, model=MODEL),
+    limit=3,
+    with_payload=["section_url", "text"],
+)
+
+def split_by_state(latest_chunks):
+    """Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown."""
+    incoming = {c["point_id"]: c for c in latest_chunks}
+
+    stored = {}
+    points = client.retrieve(
+        COLLECTION,
+        ids=list(incoming),
+        with_payload=["content_hash"],
+        with_vectors=False,
+    )
+    for p in points:
+        stored[str(p.id)] = p.payload["content_hash"]
+
+    unchanged, content_changed, unknown_ids = [], [], []
+    for pid, c in incoming.items():
+        if stored.get(pid) == c["content_hash"]:
+            unchanged.append(c)
+        elif pid in stored:
+            content_changed.append(c)
+        else:
+            unknown_ids.append(c)
+
+    return incoming, unchanged, content_changed, unknown_ids
+
+incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(LATEST_CHUNKS)
+
+def re_embed_changed(content_changed):
+    if not content_changed:
+        return
+    client.upsert(COLLECTION,
+        points=[
+            models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            for c in content_changed],
+        wait=True)
+
+def reuse_or_add(unknown_ids):
+    """Reuse an existing embedding when the same text is already stored; embed only what is new."""
+    reused, added = 0, 0
+
+    for c in unknown_ids:
+        same_text = models.Filter(must=[
+            models.FieldCondition(
+                key="content_hash",
+                match=models.MatchValue(value=c["content_hash"]),
+            )
+        ])
+        hits, _ = client.scroll(
+            COLLECTION,
+            scroll_filter=same_text,
+            limit=1,
+            with_payload=["last_updated"],
+            with_vectors=True,
+        )
+
+        if hits:  # same text, new address: copy the vector, keep its last_updated
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=hits[0].vector,
+                payload=payload(c, hits[0].payload["last_updated"]),
+            )
+            reused += 1
+        else:     # genuinely new content: embed and insert
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            added += 1
+
+        client.upsert(COLLECTION, points=[point], wait=True)
+
+    return reused, added
+
+def delete_gone(incoming_ids):
+    """Remove every point the current crawl no longer contains. Returns how many."""
+    if not incoming_ids:
+        raise ValueError("Refusing to delete from an empty source snapshot.")
+
+    stale = models.Filter(must_not=[models.HasIdCondition(has_id=list(incoming_ids))])
+
+    to_delete = client.count(COLLECTION, count_filter=stale).count
+
+    # potential check against a threshold to avoid accidental mass deletion could be added here
+    client.delete(COLLECTION, points_selector=models.FilterSelector(filter=stale), wait=True)
+    return to_delete
+
+def sync(latest_chunks):
+    check_gate()  # refuse to mix embedding models or pipeline versions
+
+    chunks = prepare_chunks_for_sync(latest_chunks)
+    incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(chunks)
+
+    re_embed_changed(content_changed)
+    reused, added = reuse_or_add(unknown_ids)
+    deleted = delete_gone(incoming_ids)
+
+    return {
+        "unchanged": len(unchanged),
+        "re-embedded": len(content_changed),
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    }
+
+run = sync(LATEST_CHUNKS)
+print(run)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/csharp.md

@@ -0,0 +1,17 @@
+```csharp
+async Task ReEmbedChanged(List<Chunk> contentChanged)
+{
+	if (contentChanged.Count == 0)
+		return;
+	await client.UpsertAsync(
+		collectionName: COLLECTION,
+		points: contentChanged.Select(c => new PointStruct
+		{
+			Id = new PointId { Uuid = c.PointId },
+			Vectors = new Document { Text = c.Text, Model = MODEL },
+			Payload = { Payload(c) },
+		}).ToList(),
+		wait: true
+	);
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/go.md

@@ -0,0 +1,20 @@
+```go
+reEmbedChanged := func(contentChanged []Chunk) {
+	if len(contentChanged) == 0 {
+		return
+	}
+	points := make([]*qdrant.PointStruct, 0, len(contentChanged))
+	for _, c := range contentChanged {
+		points = append(points, &qdrant.PointStruct{
+			Id:      qdrant.NewID(c.PointID),
+			Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+			Payload: qdrant.NewValueMap(payload(c, "")),
+		})
+	}
+	client.Upsert(context.Background(), &qdrant.UpsertPoints{
+		CollectionName: COLLECTION,
+		Points:         points,
+		Wait:           qdrant.PtrOf(true),
+	})
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/java.md

@@ -0,0 +1,23 @@
+```java
+static void reEmbedChanged(List<Chunk> contentChanged) throws Exception {
+    if (contentChanged.isEmpty()) {
+        return;
+    }
+    List<PointStruct> points = new ArrayList<>();
+    for (Chunk c : contentChanged) {
+        points.add(
+            PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build());
+    }
+    client.upsertAsync(COLLECTION, points).get();
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/python.md

@@ -0,0 +1,14 @@
+```python
+def re_embed_changed(content_changed):
+    if not content_changed:
+        return
+    client.upsert(COLLECTION,
+        points=[
+            models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            for c in content_changed],
+        wait=True)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/rust.md

@@ -0,0 +1,22 @@
+```rust
+async fn re_embed_changed(client: &Qdrant, content_changed: &[Chunk]) -> anyhow::Result<()> {
+    if content_changed.is_empty() {
+        return Ok(());
+    }
+    let points: Vec<PointStruct> = content_changed
+        .iter()
+        .map(|c| {
+            Ok(PointStruct::new(
+                c.point_id.clone(),
+                Document::new(&c.text, MODEL),
+                payload(c, None)?,
+            ))
+        })
+        .collect::<anyhow::Result<_>>()?;
+
+    client
+        .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+        .await?;
+    Ok(())
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/re-embed-changed/typescript.md

@@ -0,0 +1,15 @@
+```typescript
+async function reEmbedChanged(contentChanged: SyncChunk[]) {
+    if (contentChanged.length === 0) {
+        return;
+    }
+    await client.upsert(COLLECTION, {
+        points: contentChanged.map((c) => ({
+            id: c.point_id,
+            vector: { text: c.text, model: MODEL },
+            payload: payload(c),
+        })),
+        wait: true,
+    });
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/csharp.md

@@ -0,0 +1,48 @@
+```csharp
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async Task<(int reused, int added)> ReuseOrAdd(List<Chunk> unknownIds)
+{
+	int reused = 0, added = 0;
+
+	foreach (var c in unknownIds)
+	{
+		var sameText = new Filter
+		{
+			Must = { MatchKeyword("content_hash", c.ContentHash) }
+		};
+		var hits = (await client.ScrollAsync(
+			COLLECTION,
+			filter: sameText,
+			limit: 1,
+			payloadSelector: new[] { "last_updated" },
+			vectorsSelector: true
+		)).Result;
+
+		PointStruct point;
+		if (hits.Count > 0) // same text, new address: copy the vector, keep its last_updated
+		{
+			point = new PointStruct
+			{
+				Id = new PointId { Uuid = c.PointId },
+				Vectors = hits[0].Vectors.Vector.GetDenseVector()!.Data.ToArray(),
+				Payload = { Payload(c, hits[0].Payload["last_updated"].StringValue) },
+			};
+			reused++;
+		}
+		else // genuinely new content: embed and insert
+		{
+			point = new PointStruct
+			{
+				Id = new PointId { Uuid = c.PointId },
+				Vectors = new Document { Text = c.Text, Model = MODEL },
+				Payload = { Payload(c) },
+			};
+			added++;
+		}
+
+		await client.UpsertAsync(COLLECTION, points: new List<PointStruct> { point }, wait: true);
+	}
+
+	return (reused, added);
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/go.md

@@ -0,0 +1,46 @@
+```go
+// reuse an existing embedding when the same text is already stored; embed only what is new
+reuseOrAdd := func(unknownIDs []Chunk) (int, int) {
+	reused, added := 0, 0
+
+	for _, c := range unknownIDs {
+		sameText := &qdrant.Filter{
+			Must: []*qdrant.Condition{
+				qdrant.NewMatch("content_hash", c.ContentHash),
+			},
+		}
+		hits, err := client.Scroll(context.Background(), &qdrant.ScrollPoints{
+			CollectionName: COLLECTION,
+			Filter:         sameText,
+			Limit:          qdrant.PtrOf(uint32(1)),
+			WithPayload:    qdrant.NewWithPayloadInclude("last_updated"),
+			WithVectors:    qdrant.NewWithVectors(true),
+		})
+
+		var point *qdrant.PointStruct
+		if len(hits) > 0 { // same text, new address: copy the vector, keep its last_updated
+			point = &qdrant.PointStruct{
+				Id:      qdrant.NewID(c.PointID),
+				Vectors: qdrant.NewVectors(hits[0].GetVectors().GetVector().GetData()...),
+				Payload: qdrant.NewValueMap(payload(c, hits[0].GetPayload()["last_updated"].GetStringValue())),
+			}
+			reused++
+		} else { // genuinely new content: embed and insert
+			point = &qdrant.PointStruct{
+				Id:      qdrant.NewID(c.PointID),
+				Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+				Payload: qdrant.NewValueMap(payload(c, "")),
+			}
+			added++
+		}
+
+		client.Upsert(context.Background(), &qdrant.UpsertPoints{
+			CollectionName: COLLECTION,
+			Points:         []*qdrant.PointStruct{point},
+			Wait:           qdrant.PtrOf(true),
+		})
+	}
+
+	return reused, added
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/java.md

@@ -0,0 +1,52 @@
+```java
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+static int[] reuseOrAdd(List<Chunk> unknownIds) throws Exception {
+    int reused = 0;
+    int added = 0;
+
+    for (Chunk c : unknownIds) {
+        Filter sameText = Filter.newBuilder()
+            .addMust(matchKeyword("content_hash", c.contentHash))
+            .build();
+
+        var hits = client.scrollAsync(
+            ScrollPoints.newBuilder()
+                .setCollectionName(COLLECTION)
+                .setFilter(sameText)
+                .setLimit(1)
+                .setWithPayload(WithPayloadSelectorFactory.include(List.of("last_updated")))
+                .setWithVectors(WithVectorsSelectorFactory.enable(true))
+                .build()).get().getResultList();
+
+        PointStruct point;
+        if (!hits.isEmpty()) { // same text, new address: copy the vector, keep its last_updated
+            point = PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(vectors(vector(
+                    VectorOutputHelper.getDenseVector(hits.get(0).getVectors().getVector())
+                        .getDataList())))
+                .putAllPayload(
+                    payload(c, hits.get(0).getPayloadMap().get("last_updated").getStringValue()))
+                .build();
+            reused++;
+        } else { // genuinely new content: embed and insert
+            point = PointStruct.newBuilder()
+                .setId(id(UUID.fromString(c.pointId)))
+                .setVectors(
+                    vectors(
+                        vector(
+                            Document.newBuilder()
+                                .setText(c.text)
+                                .setModel(MODEL)
+                                .build())))
+                .putAllPayload(payload(c, null))
+                .build();
+            added++;
+        }
+
+        client.upsertAsync(COLLECTION, List.of(point)).get();
+    }
+
+    return new int[] {reused, added};
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/python.md

@@ -0,0 +1,39 @@
+```python
+def reuse_or_add(unknown_ids):
+    """Reuse an existing embedding when the same text is already stored; embed only what is new."""
+    reused, added = 0, 0
+
+    for c in unknown_ids:
+        same_text = models.Filter(must=[
+            models.FieldCondition(
+                key="content_hash",
+                match=models.MatchValue(value=c["content_hash"]),
+            )
+        ])
+        hits, _ = client.scroll(
+            COLLECTION,
+            scroll_filter=same_text,
+            limit=1,
+            with_payload=["last_updated"],
+            with_vectors=True,
+        )
+
+        if hits:  # same text, new address: copy the vector, keep its last_updated
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=hits[0].vector,
+                payload=payload(c, hits[0].payload["last_updated"]),
+            )
+            reused += 1
+        else:     # genuinely new content: embed and insert
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            added += 1
+
+        client.upsert(COLLECTION, points=[point], wait=True)
+
+    return reused, added
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/rust.md

@@ -0,0 +1,51 @@
+```rust
+/// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async fn reuse_or_add(client: &Qdrant, unknown_ids: &[Chunk]) -> anyhow::Result<(usize, usize)> {
+    let (mut reused, mut added) = (0, 0);
+
+    for c in unknown_ids {
+        let same_text =
+            Filter::must([Condition::matches("content_hash", c.content_hash.clone())]);
+        let hits = client
+            .scroll(
+                ScrollPointsBuilder::new(COLLECTION)
+                    .filter(same_text)
+                    .limit(1)
+                    .with_payload(PayloadIncludeSelector::new(vec![
+                        "last_updated".to_string()
+                    ]))
+                    .with_vectors(true),
+            )
+            .await?
+            .result;
+
+        let point = if let Some(hit) = hits.into_iter().next() {
+            // same text, new address: copy the vector, keep its last_updated
+            let last_updated = hit.get("last_updated").as_str().cloned();
+            let vector: Vec<f32> = match hit.vectors.and_then(|v| v.vectors_options) {
+                Some(vectors_output::VectorsOptions::Vector(v)) => match v.vector {
+                    Some(vector_output::Vector::Dense(dense)) => dense.data,
+                    _ => anyhow::bail!("expected a dense vector on the stored point"),
+                },
+                _ => anyhow::bail!("expected a dense vector on the stored point"),
+            };
+            reused += 1;
+            PointStruct::new(c.point_id.clone(), vector, payload(c, last_updated)?)
+        } else {
+            // genuinely new content: embed and insert
+            added += 1;
+            PointStruct::new(
+                c.point_id.clone(),
+                Document::new(&c.text, MODEL),
+                payload(c, None)?,
+            )
+        };
+
+        client
+            .upsert_points(UpsertPointsBuilder::new(COLLECTION, vec![point]).wait(true))
+            .await?;
+    }
+
+    Ok((reused, added))
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/reuse-or-add/typescript.md

@@ -0,0 +1,45 @@
+```typescript
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async function reuseOrAdd(unknownIds: SyncChunk[]) {
+    let reused = 0;
+    let added = 0;
+
+    for (const c of unknownIds) {
+        const sameText = {
+            must: [
+                {
+                    key: "content_hash",
+                    match: { value: c.content_hash },
+                },
+            ],
+        };
+        const hits = (await client.scroll(COLLECTION, {
+            filter: sameText,
+            limit: 1,
+            with_payload: ["last_updated"],
+            with_vector: true,
+        })).points;
+
+        let point: Schemas["PointStruct"];
+        if (hits.length > 0) { // same text, new address: copy the vector, keep its last_updated
+            point = {
+                id: c.point_id,
+                vector: hits[0].vector as number[],
+                payload: payload(c, hits[0].payload?.last_updated as string),
+            };
+            reused += 1;
+        } else { // genuinely new content: embed and insert
+            point = {
+                id: c.point_id,
+                vector: { text: c.text, model: MODEL },
+                payload: payload(c),
+            };
+            added += 1;
+        }
+
+        await client.upsert(COLLECTION, { points: [point], wait: true });
+    }
+
+    return { reused, added };
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/csharp.md

@@ -0,0 +1,5 @@
+```csharp
+var run = await Sync(LATEST_CHUNKS);
+foreach (var (op, count) in run)
+	Console.WriteLine($"{op}: {count}");
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/go.md

@@ -0,0 +1,4 @@
+```go
+run := sync(LATEST_CHUNKS)
+fmt.Println(run)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/java.md

@@ -0,0 +1,6 @@
+```java
+static void runSync() throws Exception {
+    Map<String, Long> run = sync(LATEST_CHUNKS);
+    System.out.println(run);
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/python.md

@@ -0,0 +1,4 @@
+```python
+run = sync(LATEST_CHUNKS)
+print(run)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/rust.md

@@ -0,0 +1,4 @@
+```rust
+let run = sync(&client, &latest_chunks).await?;
+println!("{run:?}");
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/run-sync/typescript.md

@@ -0,0 +1,4 @@
+```typescript
+const run = await sync(LATEST_CHUNKS);
+console.log(run);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/rust.md

@@ -0,0 +1,322 @@
+```rust
+use serde_json::{json, Value};
+use std::collections::HashMap;
+
+use qdrant_client::qdrant::{
+    point_id::PointIdOptions, vector_output, vectors_output, Condition, CountPointsBuilder,
+    CreateCollectionBuilder, CreateFieldIndexCollectionBuilder, DeletePointsBuilder, Distance,
+    Document, FieldType, Filter, GetPointsBuilder, PayloadIncludeSelector, PointId, PointStruct,
+    Query, QueryPointsBuilder, ScrollPointsBuilder, UpsertPointsBuilder, VectorParamsBuilder,
+};
+use qdrant_client::{Payload, Qdrant};
+use sha2::{Digest, Sha256};
+
+let qdrant_url = std::env::var("QDRANT_URL")?;
+let qdrant_api_key = std::env::var("QDRANT_API_KEY")?;
+
+let client = Qdrant::from_url(&qdrant_url)
+    .api_key(qdrant_api_key)
+    .build()?;
+
+const MODEL: &str = "sentence-transformers/all-MiniLM-L6-v2";
+const PIPELINE: &str = "docs-prep-pipeline-v1";
+const COLLECTION: &str = "docs-sync-tutorial";
+
+let mut metadata: HashMap<String, Value> = HashMap::new();
+metadata.insert("embedding_model".to_string(), json!(MODEL));
+metadata.insert("pipeline_version".to_string(), json!(PIPELINE));
+
+client
+    .create_collection(
+        CreateCollectionBuilder::new(COLLECTION)
+            .vectors_config(VectorParamsBuilder::new(
+                384, // all-MiniLM-L6-v2 output dimension
+                Distance::Cosine,
+            ))
+            .metadata(metadata),
+    )
+    .await?;
+
+async fn check_gate(client: &Qdrant) -> anyhow::Result<()> {
+    // compare this pipeline's constants against what the collection records about itself
+    let meta = client
+        .collection_info(COLLECTION)
+        .await?
+        .result
+        .and_then(|info| info.config)
+        .map(|config| config.metadata)
+        .unwrap_or_default();
+
+    if meta.get("embedding_model").and_then(|v| v.as_str()).map(String::as_str) != Some(MODEL)
+        || meta.get("pipeline_version").and_then(|v| v.as_str()).map(String::as_str)
+            != Some(PIPELINE)
+    {
+        anyhow::bail!(
+            "collection was built by {meta:?}: full re-embed into a fresh collection required"
+        );
+    }
+    Ok(())
+}
+
+fn content_hash(text: &str) -> String {
+    Sha256::digest(text.as_bytes())
+        .iter()
+        .map(|byte| format!("{byte:02x}"))
+        .collect()
+}
+
+fn point_id(url: &str, anchor: &str, num: u32) -> String {
+    // NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+    uuid::Uuid::new_v5(
+        &uuid::Uuid::NAMESPACE_URL,
+        format!("{url}#{anchor}::{num}").as_bytes(),
+    )
+    .to_string()
+}
+
+/// Derive both values (and the section address) for every raw chunk.
+fn prepare_chunks_for_sync(chunks: &[Chunk]) -> Vec<Chunk> {
+    chunks
+        .iter()
+        .map(|c| {
+            let text = normalize(&c.text);
+            Chunk {
+                text: text.clone(),
+                section_url: if c.anchor.is_empty() {
+                    c.url.clone()
+                } else {
+                    format!("{}#{}", c.url, c.anchor)
+                },
+                content_hash: content_hash(&text),
+                point_id: point_id(&c.url, &c.anchor, c.chunk_num),
+                ..c.clone()
+            }
+        })
+        .collect()
+}
+
+fn payload(chunk: &Chunk, last_updated: Option<String>) -> anyhow::Result<Payload> {
+    let last_updated = last_updated.unwrap_or_else(|| {
+        chrono::Utc::now().to_rfc3339_opts(chrono::SecondsFormat::Secs, false)
+    });
+    Ok(Payload::try_from(serde_json::json!({
+        "url": chunk.url,
+        "anchor": chunk.anchor,
+        "chunk_num": chunk.chunk_num,
+        "section_url": chunk.section_url,
+        "text": chunk.text,
+        "content_hash": chunk.content_hash,
+        "last_updated": last_updated,
+    }))?)
+}
+
+for field in ["content_hash", "url", "section_url"] {
+    client
+        .create_field_index(CreateFieldIndexCollectionBuilder::new(
+            COLLECTION,
+            field,
+            FieldType::Keyword,
+        ))
+        .await?;
+}
+
+let points: Vec<PointStruct> = prepare_chunks_for_sync(&chunks)
+    .iter()
+    .map(|c| {
+        Ok(PointStruct::new(
+            c.point_id.clone(),
+            Document::new(&c.text, MODEL),
+            payload(c, None)?,
+        ))
+    })
+    .collect::<anyhow::Result<_>>()?;
+
+client
+    .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+    .await?;
+
+const QUERY: &str = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+client
+    .query(
+        QueryPointsBuilder::new(COLLECTION)
+            .query(Query::new_nearest(Document::new(QUERY, MODEL)))
+            .limit(3)
+            .with_payload(PayloadIncludeSelector::new(vec![
+                "section_url".to_string(),
+                "text".to_string(),
+            ])),
+    )
+    .await?;
+
+/// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async fn split_by_state(
+    client: &Qdrant,
+    latest_chunks: &[Chunk],
+) -> anyhow::Result<(HashMap<String, Chunk>, Vec<Chunk>, Vec<Chunk>, Vec<Chunk>)> {
+    let incoming: HashMap<String, Chunk> = latest_chunks
+        .iter()
+        .map(|c| (c.point_id.clone(), c.clone()))
+        .collect();
+
+    let ids: Vec<PointId> = incoming.keys().map(|id| id.as_str().into()).collect();
+    let points = client
+        .get_points(
+            GetPointsBuilder::new(COLLECTION, ids)
+                .with_payload(PayloadIncludeSelector::new(vec!["content_hash".to_string()]))
+                .with_vectors(false),
+        )
+        .await?;
+
+    let mut stored: HashMap<String, String> = HashMap::new();
+    for p in points.result {
+        let hash = p.get("content_hash").as_str().cloned();
+        if let (Some(PointIdOptions::Uuid(id)), Some(hash)) =
+            (p.id.and_then(|i| i.point_id_options), hash)
+        {
+            stored.insert(id, hash);
+        }
+    }
+
+    let (mut unchanged, mut content_changed, mut unknown_ids) =
+        (Vec::new(), Vec::new(), Vec::new());
+    for (pid, c) in &incoming {
+        if stored.get(pid) == Some(&c.content_hash) {
+            unchanged.push(c.clone());
+        } else if stored.contains_key(pid) {
+            content_changed.push(c.clone());
+        } else {
+            unknown_ids.push(c.clone());
+        }
+    }
+
+    Ok((incoming, unchanged, content_changed, unknown_ids))
+}
+
+let (incoming_ids, unchanged, content_changed, unknown_ids) =
+    split_by_state(&client, &latest_chunks).await?;
+
+async fn re_embed_changed(client: &Qdrant, content_changed: &[Chunk]) -> anyhow::Result<()> {
+    if content_changed.is_empty() {
+        return Ok(());
+    }
+    let points: Vec<PointStruct> = content_changed
+        .iter()
+        .map(|c| {
+            Ok(PointStruct::new(
+                c.point_id.clone(),
+                Document::new(&c.text, MODEL),
+                payload(c, None)?,
+            ))
+        })
+        .collect::<anyhow::Result<_>>()?;
+
+    client
+        .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+        .await?;
+    Ok(())
+}
+
+/// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async fn reuse_or_add(client: &Qdrant, unknown_ids: &[Chunk]) -> anyhow::Result<(usize, usize)> {
+    let (mut reused, mut added) = (0, 0);
+
+    for c in unknown_ids {
+        let same_text =
+            Filter::must([Condition::matches("content_hash", c.content_hash.clone())]);
+        let hits = client
+            .scroll(
+                ScrollPointsBuilder::new(COLLECTION)
+                    .filter(same_text)
+                    .limit(1)
+                    .with_payload(PayloadIncludeSelector::new(vec![
+                        "last_updated".to_string()
+                    ]))
+                    .with_vectors(true),
+            )
+            .await?
+            .result;
+
+        let point = if let Some(hit) = hits.into_iter().next() {
+            // same text, new address: copy the vector, keep its last_updated
+            let last_updated = hit.get("last_updated").as_str().cloned();
+            let vector: Vec<f32> = match hit.vectors.and_then(|v| v.vectors_options) {
+                Some(vectors_output::VectorsOptions::Vector(v)) => match v.vector {
+                    Some(vector_output::Vector::Dense(dense)) => dense.data,
+                    _ => anyhow::bail!("expected a dense vector on the stored point"),
+                },
+                _ => anyhow::bail!("expected a dense vector on the stored point"),
+            };
+            reused += 1;
+            PointStruct::new(c.point_id.clone(), vector, payload(c, last_updated)?)
+        } else {
+            // genuinely new content: embed and insert
+            added += 1;
+            PointStruct::new(
+                c.point_id.clone(),
+                Document::new(&c.text, MODEL),
+                payload(c, None)?,
+            )
+        };
+
+        client
+            .upsert_points(UpsertPointsBuilder::new(COLLECTION, vec![point]).wait(true))
+            .await?;
+    }
+
+    Ok((reused, added))
+}
+
+/// Remove every point the current crawl no longer contains. Returns how many.
+async fn delete_gone(
+    client: &Qdrant,
+    incoming_ids: &HashMap<String, Chunk>,
+) -> anyhow::Result<u64> {
+    if incoming_ids.is_empty() {
+        anyhow::bail!("Refusing to delete from an empty source snapshot.");
+    }
+
+    let stale = Filter::must_not([Condition::has_id(
+        incoming_ids.keys().map(|id| PointId::from(id.as_str())),
+    )]);
+
+    let to_delete = client
+        .count(CountPointsBuilder::new(COLLECTION).filter(stale.clone()))
+        .await?
+        .result
+        .map(|r| r.count)
+        .unwrap_or(0);
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    client
+        .delete_points(DeletePointsBuilder::new(COLLECTION).points(stale).wait(true))
+        .await?;
+    Ok(to_delete)
+}
+
+async fn sync(
+    client: &Qdrant,
+    latest_chunks: &[Chunk],
+) -> anyhow::Result<HashMap<&'static str, usize>> {
+    check_gate(client).await?; // refuse to mix embedding models or pipeline versions
+
+    let chunks = prepare_chunks_for_sync(latest_chunks);
+    let (incoming_ids, unchanged, content_changed, unknown_ids) =
+        split_by_state(client, &chunks).await?;
+
+    re_embed_changed(client, &content_changed).await?;
+    let (reused, added) = reuse_or_add(client, &unknown_ids).await?;
+    let deleted = delete_gone(client, &incoming_ids).await?;
+
+    Ok(HashMap::from([
+        ("unchanged", unchanged.len()),
+        ("re-embedded", content_changed.len()),
+        ("reused_embedding", reused),
+        ("added", added),
+        ("deleted", deleted as usize),
+    ]))
+}
+
+let run = sync(&client, &latest_chunks).await?;
+println!("{run:?}");
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/csharp.md

@@ -0,0 +1,10 @@
+```csharp
+var QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+await client.QueryAsync(
+	collectionName: COLLECTION,
+	query: new Document { Text = QUERY, Model = MODEL },
+	limit: 3,
+	payloadSelector: new[] { "section_url", "text" }
+);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/go.md

@@ -0,0 +1,10 @@
+```go
+QUERY := "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+client.Query(context.Background(), &qdrant.QueryPoints{
+	CollectionName: COLLECTION,
+	Query:          qdrant.NewQueryDocument(&qdrant.Document{Text: QUERY, Model: MODEL}),
+	Limit:          qdrant.PtrOf(uint64(3)),
+	WithPayload:    qdrant.NewWithPayloadInclude("section_url", "text"),
+})
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/java.md

@@ -0,0 +1,19 @@
+```java
+static final String QUERY =
+    "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+static void search() throws Exception {
+    client.queryAsync(
+        QueryPoints.newBuilder()
+            .setCollectionName(COLLECTION)
+            .setQuery(
+                nearest(
+                    Document.newBuilder()
+                        .setText(QUERY)
+                        .setModel(MODEL)
+                        .build()))
+            .setLimit(3)
+            .setWithPayload(WithPayloadSelectorFactory.include(List.of("section_url", "text")))
+            .build()).get();
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/python.md

@@ -0,0 +1,10 @@
+```python
+QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+client.query_points(
+    COLLECTION,
+    query=models.Document(text=QUERY, model=MODEL),
+    limit=3,
+    with_payload=["section_url", "text"],
+)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/rust.md

@@ -0,0 +1,15 @@
+```rust
+const QUERY: &str = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+client
+    .query(
+        QueryPointsBuilder::new(COLLECTION)
+            .query(Query::new_nearest(Document::new(QUERY, MODEL)))
+            .limit(3)
+            .with_payload(PayloadIncludeSelector::new(vec![
+                "section_url".to_string(),
+                "text".to_string(),
+            ])),
+    )
+    .await?;
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/search/typescript.md

@@ -0,0 +1,9 @@
+```typescript
+const QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+await client.query(COLLECTION, {
+    query: { text: QUERY, model: MODEL },
+    limit: 3,
+    with_payload: ["section_url", "text"],
+});
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/csharp.md

@@ -0,0 +1,35 @@
+```csharp
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async Task<(Dictionary<string, Chunk> incomingIds, List<Chunk> unchanged, List<Chunk> contentChanged, List<Chunk> unknownIds)>
+	SplitByState(List<Chunk> latestChunks)
+{
+	var incoming = latestChunks.ToDictionary(c => c.PointId);
+
+	var stored = new Dictionary<string, string>();
+	var points = await client.RetrieveAsync(
+		COLLECTION,
+		ids: incoming.Keys.Select(pid => new PointId { Uuid = pid }).ToList(),
+		payloadSelector: new[] { "content_hash" },
+		vectorSelector: false
+	);
+	foreach (var p in points)
+		stored[p.Id.Uuid] = p.Payload["content_hash"].StringValue;
+
+	var unchanged = new List<Chunk>();
+	var contentChanged = new List<Chunk>();
+	var unknownIds = new List<Chunk>();
+	foreach (var (pid, c) in incoming)
+	{
+		if (stored.TryGetValue(pid, out var hash) && hash == c.ContentHash)
+			unchanged.Add(c);
+		else if (stored.ContainsKey(pid))
+			contentChanged.Add(c);
+		else
+			unknownIds.Add(c);
+	}
+
+	return (incoming, unchanged, contentChanged, unknownIds);
+}
+
+var splitState = await SplitByState(LATEST_CHUNKS);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/go.md

@@ -0,0 +1,39 @@
+```go
+// compare the incoming chunk list to the collection: who is unchanged, changed, or unknown
+splitByState := func(latestChunks []Chunk) (map[string]Chunk, []Chunk, []Chunk, []Chunk) {
+	incoming := make(map[string]Chunk, len(latestChunks))
+	ids := make([]*qdrant.PointId, 0, len(latestChunks))
+	for _, c := range latestChunks {
+		incoming[c.PointID] = c
+		ids = append(ids, qdrant.NewID(c.PointID))
+	}
+
+	retrieved, err := client.Get(context.Background(), &qdrant.GetPoints{
+		CollectionName: COLLECTION,
+		Ids:            ids,
+		WithPayload:    qdrant.NewWithPayloadInclude("content_hash"),
+		WithVectors:    qdrant.NewWithVectors(false),
+	})
+	stored := make(map[string]string, len(retrieved))
+	for _, p := range retrieved {
+		stored[p.GetId().GetUuid()] = p.GetPayload()["content_hash"].GetStringValue()
+	}
+
+	var unchanged, contentChanged, unknownIDs []Chunk
+	for pid, c := range incoming {
+		storedHash, found := stored[pid]
+		switch {
+		case found && storedHash == c.ContentHash:
+			unchanged = append(unchanged, c)
+		case found:
+			contentChanged = append(contentChanged, c)
+		default:
+			unknownIDs = append(unknownIDs, c)
+		}
+	}
+
+	return incoming, unchanged, contentChanged, unknownIDs
+}
+
+incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(LATEST_CHUNKS)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/java.md

@@ -0,0 +1,43 @@
+```java
+static class SyncState {
+    Map<String, Chunk> incoming = new LinkedHashMap<>();
+    List<Chunk> unchanged = new ArrayList<>();
+    List<Chunk> contentChanged = new ArrayList<>();
+    List<Chunk> unknownIds = new ArrayList<>();
+}
+
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+static SyncState splitByState(List<Chunk> latestChunks) throws Exception {
+    SyncState state = new SyncState();
+    for (Chunk c : latestChunks) {
+        state.incoming.put(c.pointId, c);
+    }
+
+    Map<String, String> stored = new HashMap<>();
+    var points = client.retrieveAsync(
+        COLLECTION,
+        state.incoming.keySet().stream()
+            .map(pid -> id(UUID.fromString(pid)))
+            .collect(Collectors.toList()),
+        WithPayloadSelectorFactory.include(List.of("content_hash")),
+        WithVectorsSelectorFactory.enable(false),
+        null).get();
+    for (var p : points) {
+        stored.put(p.getId().getUuid(), p.getPayloadMap().get("content_hash").getStringValue());
+    }
+
+    for (Map.Entry<String, Chunk> e : state.incoming.entrySet()) {
+        String pid = e.getKey();
+        Chunk c = e.getValue();
+        if (c.contentHash.equals(stored.get(pid))) {
+            state.unchanged.add(c);
+        } else if (stored.containsKey(pid)) {
+            state.contentChanged.add(c);
+        } else {
+            state.unknownIds.add(c);
+        }
+    }
+
+    return state;
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/python.md

@@ -0,0 +1,28 @@
+```python
+def split_by_state(latest_chunks):
+    """Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown."""
+    incoming = {c["point_id"]: c for c in latest_chunks}
+
+    stored = {}
+    points = client.retrieve(
+        COLLECTION,
+        ids=list(incoming),
+        with_payload=["content_hash"],
+        with_vectors=False,
+    )
+    for p in points:
+        stored[str(p.id)] = p.payload["content_hash"]
+
+    unchanged, content_changed, unknown_ids = [], [], []
+    for pid, c in incoming.items():
+        if stored.get(pid) == c["content_hash"]:
+            unchanged.append(c)
+        elif pid in stored:
+            content_changed.append(c)
+        else:
+            unknown_ids.append(c)
+
+    return incoming, unchanged, content_changed, unknown_ids
+
+incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(LATEST_CHUNKS)
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/rust.md

@@ -0,0 +1,48 @@
+```rust
+/// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async fn split_by_state(
+    client: &Qdrant,
+    latest_chunks: &[Chunk],
+) -> anyhow::Result<(HashMap<String, Chunk>, Vec<Chunk>, Vec<Chunk>, Vec<Chunk>)> {
+    let incoming: HashMap<String, Chunk> = latest_chunks
+        .iter()
+        .map(|c| (c.point_id.clone(), c.clone()))
+        .collect();
+
+    let ids: Vec<PointId> = incoming.keys().map(|id| id.as_str().into()).collect();
+    let points = client
+        .get_points(
+            GetPointsBuilder::new(COLLECTION, ids)
+                .with_payload(PayloadIncludeSelector::new(vec!["content_hash".to_string()]))
+                .with_vectors(false),
+        )
+        .await?;
+
+    let mut stored: HashMap<String, String> = HashMap::new();
+    for p in points.result {
+        let hash = p.get("content_hash").as_str().cloned();
+        if let (Some(PointIdOptions::Uuid(id)), Some(hash)) =
+            (p.id.and_then(|i| i.point_id_options), hash)
+        {
+            stored.insert(id, hash);
+        }
+    }
+
+    let (mut unchanged, mut content_changed, mut unknown_ids) =
+        (Vec::new(), Vec::new(), Vec::new());
+    for (pid, c) in &incoming {
+        if stored.get(pid) == Some(&c.content_hash) {
+            unchanged.push(c.clone());
+        } else if stored.contains_key(pid) {
+            content_changed.push(c.clone());
+        } else {
+            unknown_ids.push(c.clone());
+        }
+    }
+
+    Ok((incoming, unchanged, content_changed, unknown_ids))
+}
+
+let (incoming_ids, unchanged, content_changed, unknown_ids) =
+    split_by_state(&client, &latest_chunks).await?;
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/split-by-state/typescript.md

@@ -0,0 +1,33 @@
+```typescript
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async function splitByState(latestChunks: SyncChunk[]) {
+    const incoming = new Map(latestChunks.map((c) => [c.point_id, c]));
+
+    const stored = new Map<string, string>();
+    const points = await client.retrieve(COLLECTION, {
+        ids: [...incoming.keys()],
+        with_payload: ["content_hash"],
+        with_vector: false,
+    });
+    for (const p of points) {
+        stored.set(String(p.id), p.payload?.content_hash as string);
+    }
+
+    const unchanged: SyncChunk[] = [];
+    const contentChanged: SyncChunk[] = [];
+    const unknownIds: SyncChunk[] = [];
+    for (const [pid, c] of incoming) {
+        if (stored.get(pid) === c.content_hash) {
+            unchanged.push(c);
+        } else if (stored.has(pid)) {
+            contentChanged.push(c);
+        } else {
+            unknownIds.push(c);
+        }
+    }
+
+    return { incoming, unchanged, contentChanged, unknownIds };
+}
+
+const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(LATEST_CHUNKS);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/csharp.md

@@ -0,0 +1,22 @@
+```csharp
+async Task<Dictionary<string, long>> Sync(List<Chunk> latestChunks)
+{
+	await CheckGate(); // refuse to mix embedding models or pipeline versions
+
+	var chunks = PrepareChunksForSync(latestChunks);
+	var (incomingIds, unchanged, contentChanged, unknownIds) = await SplitByState(chunks);
+
+	await ReEmbedChanged(contentChanged);
+	var (reused, added) = await ReuseOrAdd(unknownIds);
+	var deleted = await DeleteGone(incomingIds);
+
+	return new Dictionary<string, long>
+	{
+		["unchanged"] = unchanged.Count,
+		["re-embedded"] = contentChanged.Count,
+		["reused_embedding"] = reused,
+		["added"] = added,
+		["deleted"] = (long)deleted,
+	};
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/go.md

@@ -0,0 +1,20 @@
+```go
+sync := func(latestChunks []Chunk) map[string]int {
+	checkGate() // refuse to mix embedding models or pipeline versions
+
+	chunks := prepareChunksForSync(latestChunks)
+	incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(chunks)
+
+	reEmbedChanged(contentChanged)
+	reused, added := reuseOrAdd(unknownIDs)
+	deleted := deleteGone(incomingIDs)
+
+	return map[string]int{
+		"unchanged":        len(unchanged),
+		"re-embedded":      len(contentChanged),
+		"reused_embedding": reused,
+		"added":            added,
+		"deleted":          deleted,
+	}
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/java.md

@@ -0,0 +1,19 @@
+```java
+static Map<String, Long> sync(List<Chunk> latestChunks) throws Exception {
+    checkGate(); // refuse to mix embedding models or pipeline versions
+
+    List<Chunk> chunks = prepareChunksForSync(latestChunks);
+    SyncState state = splitByState(chunks);
+
+    reEmbedChanged(state.contentChanged);
+    int[] reusedAdded = reuseOrAdd(state.unknownIds); // {reused, added}
+    long deleted = deleteGone(state.incoming);
+
+    return Map.of(
+        "unchanged", (long) state.unchanged.size(),
+        "re-embedded", (long) state.contentChanged.size(),
+        "reused_embedding", (long) reusedAdded[0],
+        "added", (long) reusedAdded[1],
+        "deleted", deleted);
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/python.md

@@ -0,0 +1,19 @@
+```python
+def sync(latest_chunks):
+    check_gate()  # refuse to mix embedding models or pipeline versions
+
+    chunks = prepare_chunks_for_sync(latest_chunks)
+    incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(chunks)
+
+    re_embed_changed(content_changed)
+    reused, added = reuse_or_add(unknown_ids)
+    deleted = delete_gone(incoming_ids)
+
+    return {
+        "unchanged": len(unchanged),
+        "re-embedded": len(content_changed),
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    }
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/rust.md

@@ -0,0 +1,24 @@
+```rust
+async fn sync(
+    client: &Qdrant,
+    latest_chunks: &[Chunk],
+) -> anyhow::Result<HashMap<&'static str, usize>> {
+    check_gate(client).await?; // refuse to mix embedding models or pipeline versions
+
+    let chunks = prepare_chunks_for_sync(latest_chunks);
+    let (incoming_ids, unchanged, content_changed, unknown_ids) =
+        split_by_state(client, &chunks).await?;
+
+    re_embed_changed(client, &content_changed).await?;
+    let (reused, added) = reuse_or_add(client, &unknown_ids).await?;
+    let deleted = delete_gone(client, &incoming_ids).await?;
+
+    Ok(HashMap::from([
+        ("unchanged", unchanged.len()),
+        ("re-embedded", content_changed.len()),
+        ("reused_embedding", reused),
+        ("added", added),
+        ("deleted", deleted as usize),
+    ]))
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/sync/typescript.md

@@ -0,0 +1,20 @@
+```typescript
+async function sync(latestChunks: RawChunk[]) {
+    await checkGate(); // refuse to mix embedding models or pipeline versions
+
+    const chunks = prepareChunksForSync(latestChunks);
+    const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(chunks);
+
+    await reEmbedChanged(contentChanged);
+    const { reused, added } = await reuseOrAdd(unknownIds);
+    const deleted = await deleteGone(incoming);
+
+    return {
+        "unchanged": unchanged.length,
+        "re-embedded": contentChanged.length,
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    };
+}
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/generated/typescript.md

@@ -0,0 +1,230 @@
+```typescript
+import { QdrantClient, Schemas } from "@qdrant/js-client-rest";
+
+const QDRANT_URL = process.env.QDRANT_URL;
+const QDRANT_API_KEY = process.env.QDRANT_API_KEY;
+
+const client = new QdrantClient({
+    url: QDRANT_URL,
+    apiKey: QDRANT_API_KEY,
+});
+
+const MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+const PIPELINE = "docs-prep-pipeline-v1";
+const COLLECTION = "docs-sync-tutorial";
+
+await client.createCollection(COLLECTION, {
+    vectors: {
+        size: 384, // all-MiniLM-L6-v2 output dimension
+        distance: "Cosine",
+    },
+});
+
+await client.updateCollection(COLLECTION, {
+    metadata: { embedding_model: MODEL, pipeline_version: PIPELINE },
+});
+
+async function checkGate() {
+    // compare this pipeline's constants against what the collection records about itself
+    const meta = ((await client.getCollection(COLLECTION)).config.metadata ??
+        {}) as Record<string, unknown>;
+
+    if (meta.embedding_model !== MODEL || meta.pipeline_version !== PIPELINE) {
+        throw new Error(`collection was built by ${JSON.stringify(meta)}: full re-embed into a fresh collection required`);
+    }
+}
+
+import { createHash } from "node:crypto";
+
+type RawChunk = { url: string; anchor: string; chunk_num: number; text: string };
+type SyncChunk = RawChunk & { section_url: string; content_hash: string; point_id: string };
+
+function contentHash(text: string): string {
+    return createHash("sha256").update(text).digest("hex");
+}
+
+// NAMESPACE_URL is a fixed constant name-based (v5) UUIDs require; it marks the input as a URL-like name
+function pointId(url: string, anchor: string, num: number): string {
+    // Qdrant accepts any well-formed UUID as a point ID:
+    // hash the address, format the digest as a UUID, and the same address always yields the same ID
+    const hex = createHash("sha256").update(`${url}#${anchor}::${num}`).digest("hex");
+    return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20, 32)}`;
+}
+
+// Derive both values (and the section address) for every raw chunk.
+function prepareChunksForSync(chunks: RawChunk[]): SyncChunk[] {
+    return chunks.map((c) => {
+        const text = normalize(c.text);
+        return {
+            ...c,
+            text,
+            section_url: c.anchor ? `${c.url}#${c.anchor}` : c.url,
+            content_hash: contentHash(text),
+            point_id: pointId(c.url, c.anchor, c.chunk_num),
+        };
+    });
+}
+
+function payload(chunk: SyncChunk, lastUpdated?: string) {
+    return {
+        url: chunk.url,
+        anchor: chunk.anchor,
+        chunk_num: chunk.chunk_num,
+        section_url: chunk.section_url,
+        text: chunk.text,
+        content_hash: chunk.content_hash,
+        last_updated: lastUpdated ?? new Date().toISOString().replace(/\.\d+Z$/, "Z"),
+    };
+}
+
+for (const field of ["content_hash", "url", "section_url"]) {
+    await client.createPayloadIndex(COLLECTION, {
+        field_name: field,
+        field_schema: "keyword",
+    });
+}
+
+await client.upsert(COLLECTION, {
+    points: prepareChunksForSync(CHUNKS).map((c) => ({
+        id: c.point_id,
+        vector: { text: c.text, model: MODEL },
+        payload: payload(c),
+    })),
+    wait: true,
+});
+
+const QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+await client.query(COLLECTION, {
+    query: { text: QUERY, model: MODEL },
+    limit: 3,
+    with_payload: ["section_url", "text"],
+});
+
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async function splitByState(latestChunks: SyncChunk[]) {
+    const incoming = new Map(latestChunks.map((c) => [c.point_id, c]));
+
+    const stored = new Map<string, string>();
+    const points = await client.retrieve(COLLECTION, {
+        ids: [...incoming.keys()],
+        with_payload: ["content_hash"],
+        with_vector: false,
+    });
+    for (const p of points) {
+        stored.set(String(p.id), p.payload?.content_hash as string);
+    }
+
+    const unchanged: SyncChunk[] = [];
+    const contentChanged: SyncChunk[] = [];
+    const unknownIds: SyncChunk[] = [];
+    for (const [pid, c] of incoming) {
+        if (stored.get(pid) === c.content_hash) {
+            unchanged.push(c);
+        } else if (stored.has(pid)) {
+            contentChanged.push(c);
+        } else {
+            unknownIds.push(c);
+        }
+    }
+
+    return { incoming, unchanged, contentChanged, unknownIds };
+}
+
+const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(LATEST_CHUNKS);
+
+async function reEmbedChanged(contentChanged: SyncChunk[]) {
+    if (contentChanged.length === 0) {
+        return;
+    }
+    await client.upsert(COLLECTION, {
+        points: contentChanged.map((c) => ({
+            id: c.point_id,
+            vector: { text: c.text, model: MODEL },
+            payload: payload(c),
+        })),
+        wait: true,
+    });
+}
+
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async function reuseOrAdd(unknownIds: SyncChunk[]) {
+    let reused = 0;
+    let added = 0;
+
+    for (const c of unknownIds) {
+        const sameText = {
+            must: [
+                {
+                    key: "content_hash",
+                    match: { value: c.content_hash },
+                },
+            ],
+        };
+        const hits = (await client.scroll(COLLECTION, {
+            filter: sameText,
+            limit: 1,
+            with_payload: ["last_updated"],
+            with_vector: true,
+        })).points;
+
+        let point: Schemas["PointStruct"];
+        if (hits.length > 0) { // same text, new address: copy the vector, keep its last_updated
+            point = {
+                id: c.point_id,
+                vector: hits[0].vector as number[],
+                payload: payload(c, hits[0].payload?.last_updated as string),
+            };
+            reused += 1;
+        } else { // genuinely new content: embed and insert
+            point = {
+                id: c.point_id,
+                vector: { text: c.text, model: MODEL },
+                payload: payload(c),
+            };
+            added += 1;
+        }
+
+        await client.upsert(COLLECTION, { points: [point], wait: true });
+    }
+
+    return { reused, added };
+}
+
+// Remove every point the current crawl no longer contains. Returns how many.
+async function deleteGone(incoming: Map<string, SyncChunk>) {
+    if (incoming.size === 0) {
+        throw new Error("Refusing to delete from an empty source snapshot.");
+    }
+
+    const stale = { must_not: [{ has_id: [...incoming.keys()] }] };
+
+    const toDelete = (await client.count(COLLECTION, { filter: stale })).count;
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    await client.delete(COLLECTION, { filter: stale, wait: true });
+    return toDelete;
+}
+
+async function sync(latestChunks: RawChunk[]) {
+    await checkGate(); // refuse to mix embedding models or pipeline versions
+
+    const chunks = prepareChunksForSync(latestChunks);
+    const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(chunks);
+
+    await reEmbedChanged(contentChanged);
+    const { reused, added } = await reuseOrAdd(unknownIds);
+    const deleted = await deleteGone(incoming);
+
+    return {
+        "unchanged": unchanged.length,
+        "re-embedded": contentChanged.length,
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    };
+}
+
+const run = await sync(LATEST_CHUNKS);
+console.log(run);
+```

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/go.go

@@ -0,0 +1,359 @@
+package snippet
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	// @block-start client-connection
+	QDRANT_URL := os.Getenv("QDRANT_URL")
+	QDRANT_API_KEY := os.Getenv("QDRANT_API_KEY")
+
+	client, err := qdrant.NewClient(&qdrant.Config{
+		Host:   QDRANT_URL,
+		APIKey: QDRANT_API_KEY,
+		UseTLS: true,
+	})
+	// @block-end client-connection
+
+	// @hide-start
+	if err != nil {
+		panic(err)
+	}
+
+	// data and text normalization are not the lesson of this tutorial:
+	// the full CHUNKS list and normalize() live in the tutorial notebook
+	type Chunk struct {
+		URL         string
+		Anchor      string
+		ChunkNum    int
+		Text        string
+		SectionURL  string
+		ContentHash string
+		PointID     string
+	}
+
+	CHUNKS := []Chunk{
+		{
+			URL:      "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+			Anchor:   "prerequisites",
+			ChunkNum: 0,
+			Text:     "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ...",
+		},
+		{
+			URL:      "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+			Anchor:   "step-3-enable-an-admin-api-key",
+			ChunkNum: 0,
+			Text:     "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ...",
+		},
+	}
+
+	invisibleChars := regexp.MustCompile("[\u200B\u200C\u200D\uFEFF\u00AD]") // zero-width chars and soft hyphen
+	whitespace := regexp.MustCompile(`\s+`)
+	normalize := func(text string) string {
+		text = invisibleChars.ReplaceAllString(text, "")
+		return strings.TrimSpace(whitespace.ReplaceAllString(text, " "))
+	}
+	// @hide-end
+
+	// @block-start create-collection
+	MODEL := "sentence-transformers/all-MiniLM-L6-v2"
+	PIPELINE := "docs-prep-pipeline-v1"
+	COLLECTION := "docs-sync-tutorial"
+
+	client.CreateCollection(context.Background(), &qdrant.CreateCollection{
+		CollectionName: COLLECTION,
+		VectorsConfig: qdrant.NewVectorsConfig(&qdrant.VectorParams{
+			Size:     384, // all-MiniLM-L6-v2 output dimension
+			Distance: qdrant.Distance_Cosine,
+		}),
+		Metadata: qdrant.NewValueMap(map[string]any{
+			"embedding_model":  MODEL,
+			"pipeline_version": PIPELINE,
+		}),
+	})
+	// @block-end create-collection
+
+	// @block-start check-gate
+	checkGate := func() {
+		// compare this pipeline's constants against what the collection records about itself
+		info, err := client.GetCollectionInfo(context.Background(), COLLECTION)
+		if err != nil { panic(err) } // @hide
+		meta := info.GetConfig().GetMetadata()
+
+		if meta["embedding_model"].GetStringValue() != MODEL || meta["pipeline_version"].GetStringValue() != PIPELINE {
+			panic(fmt.Sprintf("collection was built by %v: full re-embed into a fresh collection required", meta))
+		}
+	}
+	// @block-end check-gate
+
+	// @block-start identity-and-fingerprint
+	contentHash := func(text string) string {
+		sum := sha256.Sum256([]byte(text))
+		return hex.EncodeToString(sum[:])
+	}
+
+	pointID := func(url, anchor string, num int) string {
+		// NewSHA1 with a namespace is UUIDv5; NameSpaceURL is a fixed constant it requires,
+		// marking the input as a URL-like name
+		return uuid.NewSHA1(uuid.NameSpaceURL, []byte(fmt.Sprintf("%s#%s::%d", url, anchor, num))).String()
+	}
+
+	// derive both values (and the section address) for every raw chunk
+	prepareChunksForSync := func(chunks []Chunk) []Chunk {
+		out := make([]Chunk, 0, len(chunks))
+		for _, c := range chunks {
+			c.Text = normalize(c.Text)
+			c.SectionURL = c.URL
+			if c.Anchor != "" {
+				c.SectionURL = c.URL + "#" + c.Anchor
+			}
+			c.ContentHash = contentHash(c.Text)
+			c.PointID = pointID(c.URL, c.Anchor, c.ChunkNum)
+			out = append(out, c)
+		}
+		return out
+	}
+	// @block-end identity-and-fingerprint
+
+	// @block-start payload
+	payload := func(c Chunk, lastUpdated string) map[string]any {
+		if lastUpdated == "" {
+			lastUpdated = time.Now().UTC().Format(time.RFC3339)
+		}
+		return map[string]any{
+			"url":          c.URL,
+			"anchor":       c.Anchor,
+			"chunk_num":    c.ChunkNum,
+			"section_url":  c.SectionURL,
+			"text":         c.Text,
+			"content_hash": c.ContentHash,
+			"last_updated": lastUpdated,
+		}
+	}
+	// @block-end payload
+
+	// @block-start payload-indexes
+	for _, field := range []string{"content_hash", "url", "section_url"} {
+		client.CreateFieldIndex(context.Background(), &qdrant.CreateFieldIndexCollection{
+			CollectionName: COLLECTION,
+			FieldName:      field,
+			FieldType:      qdrant.FieldType_FieldTypeKeyword.Enum(),
+		})
+	}
+	// @block-end payload-indexes
+
+	// @block-start populate
+	var points []*qdrant.PointStruct
+	for _, c := range prepareChunksForSync(CHUNKS) {
+		points = append(points, &qdrant.PointStruct{
+			Id: qdrant.NewID(c.PointID),
+
+			Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+			Payload: qdrant.NewValueMap(payload(c, "")),
+		})
+	}
+	client.Upsert(context.Background(), &qdrant.UpsertPoints{
+		CollectionName: COLLECTION,
+		Points:         points,
+		Wait:           qdrant.PtrOf(true),
+	})
+	// @block-end populate
+
+	// @block-start search
+	QUERY := "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+	client.Query(context.Background(), &qdrant.QueryPoints{
+		CollectionName: COLLECTION,
+		Query:          qdrant.NewQueryDocument(&qdrant.Document{Text: QUERY, Model: MODEL}),
+		Limit:          qdrant.PtrOf(uint64(3)),
+		WithPayload:    qdrant.NewWithPayloadInclude("section_url", "text"),
+	})
+	// @block-end search
+
+	// @hide-start
+	// the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+	LATEST_CHUNKS := prepareChunksForSync(CHUNKS)
+	// @hide-end
+
+	// @block-start split-by-state
+	// compare the incoming chunk list to the collection: who is unchanged, changed, or unknown
+	splitByState := func(latestChunks []Chunk) (map[string]Chunk, []Chunk, []Chunk, []Chunk) {
+		incoming := make(map[string]Chunk, len(latestChunks))
+		ids := make([]*qdrant.PointId, 0, len(latestChunks))
+		for _, c := range latestChunks {
+			incoming[c.PointID] = c
+			ids = append(ids, qdrant.NewID(c.PointID))
+		}
+
+		retrieved, err := client.Get(context.Background(), &qdrant.GetPoints{
+			CollectionName: COLLECTION,
+			Ids:            ids,
+			WithPayload:    qdrant.NewWithPayloadInclude("content_hash"),
+			WithVectors:    qdrant.NewWithVectors(false),
+		})
+		if err != nil { panic(err) } // @hide
+		stored := make(map[string]string, len(retrieved))
+		for _, p := range retrieved {
+			stored[p.GetId().GetUuid()] = p.GetPayload()["content_hash"].GetStringValue()
+		}
+
+		var unchanged, contentChanged, unknownIDs []Chunk
+		for pid, c := range incoming {
+			storedHash, found := stored[pid]
+			switch {
+			case found && storedHash == c.ContentHash:
+				unchanged = append(unchanged, c)
+			case found:
+				contentChanged = append(contentChanged, c)
+			default:
+				unknownIDs = append(unknownIDs, c)
+			}
+		}
+
+		return incoming, unchanged, contentChanged, unknownIDs
+	}
+
+	incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(LATEST_CHUNKS)
+	// @block-end split-by-state
+
+	// @hide-start
+	_, _, _, _ = incomingIDs, unchanged, contentChanged, unknownIDs
+	// @hide-end
+
+	// @block-start re-embed-changed
+	reEmbedChanged := func(contentChanged []Chunk) {
+		if len(contentChanged) == 0 {
+			return
+		}
+		points := make([]*qdrant.PointStruct, 0, len(contentChanged))
+		for _, c := range contentChanged {
+			points = append(points, &qdrant.PointStruct{
+				Id:      qdrant.NewID(c.PointID),
+				Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+				Payload: qdrant.NewValueMap(payload(c, "")),
+			})
+		}
+		client.Upsert(context.Background(), &qdrant.UpsertPoints{
+			CollectionName: COLLECTION,
+			Points:         points,
+			Wait:           qdrant.PtrOf(true),
+		})
+	}
+	// @block-end re-embed-changed
+
+	// @block-start reuse-or-add
+	// reuse an existing embedding when the same text is already stored; embed only what is new
+	reuseOrAdd := func(unknownIDs []Chunk) (int, int) {
+		reused, added := 0, 0
+
+		for _, c := range unknownIDs {
+			sameText := &qdrant.Filter{
+				Must: []*qdrant.Condition{
+					qdrant.NewMatch("content_hash", c.ContentHash),
+				},
+			}
+			hits, err := client.Scroll(context.Background(), &qdrant.ScrollPoints{
+				CollectionName: COLLECTION,
+				Filter:         sameText,
+				Limit:          qdrant.PtrOf(uint32(1)),
+				WithPayload:    qdrant.NewWithPayloadInclude("last_updated"),
+				WithVectors:    qdrant.NewWithVectors(true),
+			})
+			if err != nil { panic(err) } // @hide
+
+			var point *qdrant.PointStruct
+			if len(hits) > 0 { // same text, new address: copy the vector, keep its last_updated
+				point = &qdrant.PointStruct{
+					Id:      qdrant.NewID(c.PointID),
+					Vectors: qdrant.NewVectors(hits[0].GetVectors().GetVector().GetData()...),
+					Payload: qdrant.NewValueMap(payload(c, hits[0].GetPayload()["last_updated"].GetStringValue())),
+				}
+				reused++
+			} else { // genuinely new content: embed and insert
+				point = &qdrant.PointStruct{
+					Id:      qdrant.NewID(c.PointID),
+					Vectors: qdrant.NewVectorsDocument(&qdrant.Document{Text: c.Text, Model: MODEL}),
+					Payload: qdrant.NewValueMap(payload(c, "")),
+				}
+				added++
+			}
+
+			client.Upsert(context.Background(), &qdrant.UpsertPoints{
+				CollectionName: COLLECTION,
+				Points:         []*qdrant.PointStruct{point},
+				Wait:           qdrant.PtrOf(true),
+			})
+		}
+
+		return reused, added
+	}
+	// @block-end reuse-or-add
+
+	// @block-start delete-gone
+	// remove every point the current crawl no longer contains, return how many
+	deleteGone := func(incomingIDs map[string]Chunk) int {
+		if len(incomingIDs) == 0 {
+			panic("Refusing to delete from an empty source snapshot.")
+		}
+
+		ids := make([]*qdrant.PointId, 0, len(incomingIDs))
+		for pid := range incomingIDs {
+			ids = append(ids, qdrant.NewID(pid))
+		}
+		stale := &qdrant.Filter{
+			MustNot: []*qdrant.Condition{qdrant.NewHasID(ids...)},
+		}
+
+		toDelete, err := client.Count(context.Background(), &qdrant.CountPoints{
+			CollectionName: COLLECTION,
+			Filter:         stale,
+		})
+		if err != nil { panic(err) } // @hide
+
+		// potential check against a threshold to avoid accidental mass deletion could be added here
+		client.Delete(context.Background(), &qdrant.DeletePoints{
+			CollectionName: COLLECTION,
+			Points:         qdrant.NewPointsSelectorFilter(stale),
+			Wait:           qdrant.PtrOf(true),
+		})
+		return int(toDelete)
+	}
+	// @block-end delete-gone
+
+	// @block-start sync
+	sync := func(latestChunks []Chunk) map[string]int {
+		checkGate() // refuse to mix embedding models or pipeline versions
+
+		chunks := prepareChunksForSync(latestChunks)
+		incomingIDs, unchanged, contentChanged, unknownIDs := splitByState(chunks)
+
+		reEmbedChanged(contentChanged)
+		reused, added := reuseOrAdd(unknownIDs)
+		deleted := deleteGone(incomingIDs)
+
+		return map[string]int{
+			"unchanged":        len(unchanged),
+			"re-embedded":      len(contentChanged),
+			"reused_embedding": reused,
+			"added":            added,
+			"deleted":          deleted,
+		}
+	}
+	// @block-end sync
+
+	// @block-start run-sync
+	run := sync(LATEST_CHUNKS)
+	fmt.Println(run)
+	// @block-end run-sync
+}

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/java.java

@@ -0,0 +1,415 @@
+package com.example.snippets_amalgamation;
+
+import static io.qdrant.client.ConditionFactory.hasId;
+import static io.qdrant.client.ConditionFactory.matchKeyword;
+import static io.qdrant.client.PointIdFactory.id;
+import static io.qdrant.client.QueryFactory.nearest;
+import static io.qdrant.client.ValueFactory.value;
+import static io.qdrant.client.VectorFactory.vector;
+import static io.qdrant.client.VectorsFactory.vectors;
+
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+import io.qdrant.client.VectorOutputHelper;
+import io.qdrant.client.WithPayloadSelectorFactory;
+import io.qdrant.client.WithVectorsSelectorFactory;
+import io.qdrant.client.grpc.Collections.CreateCollection;
+import io.qdrant.client.grpc.Collections.Distance;
+import io.qdrant.client.grpc.Collections.PayloadSchemaType;
+import io.qdrant.client.grpc.Collections.VectorParams;
+import io.qdrant.client.grpc.Collections.VectorsConfig;
+import io.qdrant.client.grpc.Common.Filter;
+import io.qdrant.client.grpc.JsonWithInt.Value;
+import io.qdrant.client.grpc.Points.Document;
+import io.qdrant.client.grpc.Points.PointStruct;
+import io.qdrant.client.grpc.Points.QueryPoints;
+import io.qdrant.client.grpc.Points.ScrollPoints;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+public class Snippet {
+
+    // @block-start client-connection
+    static final String QDRANT_URL = System.getenv("QDRANT_URL");
+    static final String QDRANT_API_KEY = System.getenv("QDRANT_API_KEY");
+
+    static final QdrantClient client =
+        new QdrantClient(
+            QdrantGrpcClient.newBuilder(QDRANT_URL, 6334, true)
+                .withApiKey(QDRANT_API_KEY)
+                .build());
+    // @block-end client-connection
+
+    // @hide-start
+    // data and text normalization are not the lesson of this tutorial:
+    // the full CHUNKS list and normalize() live in the tutorial notebook
+    static class Chunk {
+        String url;
+        String anchor;
+        int chunkNum;
+        String text;
+        String sectionUrl;  // derived in prepareChunksForSync
+        String contentHash; // derived in prepareChunksForSync
+        String pointId;     // derived in prepareChunksForSync
+
+        Chunk(String url, String anchor, int chunkNum, String text) {
+            this.url = url;
+            this.anchor = anchor;
+            this.chunkNum = chunkNum;
+            this.text = text;
+        }
+    }
+
+    static final List<Chunk> CHUNKS = List.of(
+        new Chunk(
+            "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+            "prerequisites",
+            0,
+            "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ..."),
+        new Chunk(
+            "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+            "step-3-enable-an-admin-api-key",
+            0,
+            "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ..."));
+
+    static String normalize(String text) {
+        return text.replaceAll("\\s+", " ").strip();
+    }
+    // @hide-end
+
+    // @block-start create-collection
+    static final String MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+    static final String PIPELINE = "docs-prep-pipeline-v1";
+    static final String COLLECTION = "docs-sync-tutorial";
+
+    static void createCollection() throws Exception {
+        client.createCollectionAsync(
+            CreateCollection.newBuilder()
+                .setCollectionName(COLLECTION)
+                .setVectorsConfig(
+                    VectorsConfig.newBuilder()
+                        .setParams(
+                            VectorParams.newBuilder()
+                                .setSize(384) // all-MiniLM-L6-v2 output dimension
+                                .setDistance(Distance.Cosine)
+                                .build())
+                        .build())
+                .putAllMetadata(
+                    Map.of(
+                        "embedding_model", value(MODEL),
+                        "pipeline_version", value(PIPELINE)))
+                .build()).get();
+    }
+    // @block-end create-collection
+
+    // @block-start check-gate
+    static void checkGate() throws Exception {
+        // compare this pipeline's constants against what the collection records about itself
+        Map<String, Value> meta =
+            client.getCollectionInfoAsync(COLLECTION).get().getConfig().getMetadataMap();
+
+        Value model = meta.get("embedding_model");
+        Value pipeline = meta.get("pipeline_version");
+        if (model == null || !MODEL.equals(model.getStringValue())
+                || pipeline == null || !PIPELINE.equals(pipeline.getStringValue())) {
+            throw new RuntimeException(
+                "collection was built by " + meta + ": full re-embed into a fresh collection required");
+        }
+    }
+    // @block-end check-gate
+
+    // @block-start identity-and-fingerprint
+    static String contentHash(String text) throws Exception {
+        byte[] digest = MessageDigest.getInstance("SHA-256")
+            .digest(text.getBytes(StandardCharsets.UTF_8));
+        return String.format("%064x", new BigInteger(1, digest));
+    }
+
+    static String pointId(String url, String anchor, int num) {
+        // name-based UUID (version 3); the same address always yields the same ID
+        return UUID.nameUUIDFromBytes(
+            (url + "#" + anchor + "::" + num).getBytes(StandardCharsets.UTF_8)).toString();
+    }
+
+    // Derive both values (and the section address) for every raw chunk.
+    static List<Chunk> prepareChunksForSync(List<Chunk> chunks) throws Exception {
+        List<Chunk> out = new ArrayList<>();
+        for (Chunk c : chunks) {
+            String text = normalize(c.text);
+            Chunk prepared = new Chunk(c.url, c.anchor, c.chunkNum, text);
+            prepared.sectionUrl = !c.anchor.isEmpty() ? c.url + "#" + c.anchor : c.url;
+            prepared.contentHash = contentHash(text);
+            prepared.pointId = pointId(c.url, c.anchor, c.chunkNum);
+            out.add(prepared);
+        }
+        return out;
+    }
+    // @block-end identity-and-fingerprint
+
+    // @block-start payload
+    static Map<String, Value> payload(Chunk chunk, String lastUpdated) {
+        Map<String, Value> p = new HashMap<>();
+        p.put("url", value(chunk.url));
+        p.put("anchor", value(chunk.anchor));
+        p.put("chunk_num", value(chunk.chunkNum));
+        p.put("section_url", value(chunk.sectionUrl));
+        p.put("text", value(chunk.text));
+        p.put("content_hash", value(chunk.contentHash));
+        p.put("last_updated", value(lastUpdated != null
+            ? lastUpdated
+            : OffsetDateTime.now(ZoneOffset.UTC).truncatedTo(ChronoUnit.SECONDS).toString()));
+        return p;
+    }
+    // @block-end payload
+
+    // @block-start payload-indexes
+    static void createPayloadIndexes() throws Exception {
+        for (String field : List.of("content_hash", "url", "section_url")) {
+            client.createPayloadIndexAsync(
+                COLLECTION, field, PayloadSchemaType.Keyword, null, null, null, null).get();
+        }
+    }
+    // @block-end payload-indexes
+
+    // @block-start populate
+    static void populate() throws Exception {
+        List<PointStruct> points = new ArrayList<>();
+        for (Chunk c : prepareChunksForSync(CHUNKS)) {
+            points.add(
+                PointStruct.newBuilder()
+                    .setId(id(UUID.fromString(c.pointId)))
+
+                    .setVectors(
+                        vectors(
+                            vector(
+                                Document.newBuilder()
+                                    .setText(c.text)
+                                    .setModel(MODEL)
+                                    .build())))
+                    .putAllPayload(payload(c, null))
+                    .build());
+        }
+        client.upsertAsync(COLLECTION, points).get();
+    }
+    // @block-end populate
+
+    // @block-start search
+    static final String QUERY =
+        "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+    static void search() throws Exception {
+        client.queryAsync(
+            QueryPoints.newBuilder()
+                .setCollectionName(COLLECTION)
+                .setQuery(
+                    nearest(
+                        Document.newBuilder()
+                            .setText(QUERY)
+                            .setModel(MODEL)
+                            .build()))
+                .setLimit(3)
+                .setWithPayload(WithPayloadSelectorFactory.include(List.of("section_url", "text")))
+                .build()).get();
+    }
+    // @block-end search
+
+    // @hide-start
+    // the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+    static List<Chunk> LATEST_CHUNKS;
+    // @hide-end
+
+    // @block-start split-by-state
+    static class SyncState {
+        Map<String, Chunk> incoming = new LinkedHashMap<>();
+        List<Chunk> unchanged = new ArrayList<>();
+        List<Chunk> contentChanged = new ArrayList<>();
+        List<Chunk> unknownIds = new ArrayList<>();
+    }
+
+    // Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+    static SyncState splitByState(List<Chunk> latestChunks) throws Exception {
+        SyncState state = new SyncState();
+        for (Chunk c : latestChunks) {
+            state.incoming.put(c.pointId, c);
+        }
+
+        Map<String, String> stored = new HashMap<>();
+        var points = client.retrieveAsync(
+            COLLECTION,
+            state.incoming.keySet().stream()
+                .map(pid -> id(UUID.fromString(pid)))
+                .collect(Collectors.toList()),
+            WithPayloadSelectorFactory.include(List.of("content_hash")),
+            WithVectorsSelectorFactory.enable(false),
+            null).get();
+        for (var p : points) {
+            stored.put(p.getId().getUuid(), p.getPayloadMap().get("content_hash").getStringValue());
+        }
+
+        for (Map.Entry<String, Chunk> e : state.incoming.entrySet()) {
+            String pid = e.getKey();
+            Chunk c = e.getValue();
+            if (c.contentHash.equals(stored.get(pid))) {
+                state.unchanged.add(c);
+            } else if (stored.containsKey(pid)) {
+                state.contentChanged.add(c);
+            } else {
+                state.unknownIds.add(c);
+            }
+        }
+
+        return state;
+    }
+    // @block-end split-by-state
+
+    // @block-start re-embed-changed
+    static void reEmbedChanged(List<Chunk> contentChanged) throws Exception {
+        if (contentChanged.isEmpty()) {
+            return;
+        }
+        List<PointStruct> points = new ArrayList<>();
+        for (Chunk c : contentChanged) {
+            points.add(
+                PointStruct.newBuilder()
+                    .setId(id(UUID.fromString(c.pointId)))
+                    .setVectors(
+                        vectors(
+                            vector(
+                                Document.newBuilder()
+                                    .setText(c.text)
+                                    .setModel(MODEL)
+                                    .build())))
+                    .putAllPayload(payload(c, null))
+                    .build());
+        }
+        client.upsertAsync(COLLECTION, points).get();
+    }
+    // @block-end re-embed-changed
+
+    // @block-start reuse-or-add
+    // Reuse an existing embedding when the same text is already stored; embed only what is new.
+    static int[] reuseOrAdd(List<Chunk> unknownIds) throws Exception {
+        int reused = 0;
+        int added = 0;
+
+        for (Chunk c : unknownIds) {
+            Filter sameText = Filter.newBuilder()
+                .addMust(matchKeyword("content_hash", c.contentHash))
+                .build();
+
+            var hits = client.scrollAsync(
+                ScrollPoints.newBuilder()
+                    .setCollectionName(COLLECTION)
+                    .setFilter(sameText)
+                    .setLimit(1)
+                    .setWithPayload(WithPayloadSelectorFactory.include(List.of("last_updated")))
+                    .setWithVectors(WithVectorsSelectorFactory.enable(true))
+                    .build()).get().getResultList();
+
+            PointStruct point;
+            if (!hits.isEmpty()) { // same text, new address: copy the vector, keep its last_updated
+                point = PointStruct.newBuilder()
+                    .setId(id(UUID.fromString(c.pointId)))
+                    .setVectors(vectors(vector(
+                        VectorOutputHelper.getDenseVector(hits.get(0).getVectors().getVector())
+                            .getDataList())))
+                    .putAllPayload(
+                        payload(c, hits.get(0).getPayloadMap().get("last_updated").getStringValue()))
+                    .build();
+                reused++;
+            } else { // genuinely new content: embed and insert
+                point = PointStruct.newBuilder()
+                    .setId(id(UUID.fromString(c.pointId)))
+                    .setVectors(
+                        vectors(
+                            vector(
+                                Document.newBuilder()
+                                    .setText(c.text)
+                                    .setModel(MODEL)
+                                    .build())))
+                    .putAllPayload(payload(c, null))
+                    .build();
+                added++;
+            }
+
+            client.upsertAsync(COLLECTION, List.of(point)).get();
+        }
+
+        return new int[] {reused, added};
+    }
+    // @block-end reuse-or-add
+
+    // @block-start delete-gone
+    // Remove every point the current crawl no longer contains. Returns how many.
+    static long deleteGone(Map<String, Chunk> incomingIds) throws Exception {
+        if (incomingIds.isEmpty()) {
+            throw new IllegalArgumentException("Refusing to delete from an empty source snapshot.");
+        }
+
+        Filter stale = Filter.newBuilder()
+            .addMustNot(hasId(
+                incomingIds.keySet().stream()
+                    .map(pid -> id(UUID.fromString(pid)))
+                    .collect(Collectors.toList())))
+            .build();
+
+        long toDelete = client.countAsync(COLLECTION, stale, true).get();
+
+        // potential check against a threshold to avoid accidental mass deletion could be added here
+        client.deleteAsync(COLLECTION, stale).get();
+        return toDelete;
+    }
+    // @block-end delete-gone
+
+    // @block-start sync
+    static Map<String, Long> sync(List<Chunk> latestChunks) throws Exception {
+        checkGate(); // refuse to mix embedding models or pipeline versions
+
+        List<Chunk> chunks = prepareChunksForSync(latestChunks);
+        SyncState state = splitByState(chunks);
+
+        reEmbedChanged(state.contentChanged);
+        int[] reusedAdded = reuseOrAdd(state.unknownIds); // {reused, added}
+        long deleted = deleteGone(state.incoming);
+
+        return Map.of(
+            "unchanged", (long) state.unchanged.size(),
+            "re-embedded", (long) state.contentChanged.size(),
+            "reused_embedding", (long) reusedAdded[0],
+            "added", (long) reusedAdded[1],
+            "deleted", deleted);
+    }
+    // @block-end sync
+
+    // @block-start run-sync
+    static void runSync() throws Exception {
+        Map<String, Long> run = sync(LATEST_CHUNKS);
+        System.out.println(run);
+    }
+    // @block-end run-sync
+
+    // @hide-start
+    public static void run() throws Exception {
+        createCollection();
+        createPayloadIndexes();
+        populate();
+        search();
+
+        LATEST_CHUNKS = prepareChunksForSync(CHUNKS);
+        SyncState state = splitByState(LATEST_CHUNKS);
+
+        runSync();
+        // @hide-end
+    }
+}

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/python.py

@@ -0,0 +1,261 @@
+# @block-start client-connection
+import os
+
+from qdrant_client import QdrantClient, models
+
+QDRANT_URL = os.getenv("QDRANT_URL")
+QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")
+
+client = QdrantClient(
+    url=QDRANT_URL,
+    api_key=QDRANT_API_KEY,
+    cloud_inference=True
+)
+# @block-end client-connection
+
+# @hide-start
+# data and text normalization are not the lesson of this tutorial:
+# the full CHUNKS list and normalize() live in the tutorial notebook
+CHUNKS = [
+    {
+        "url": "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+        "anchor": "prerequisites",
+        "chunk_num": 0,
+        "text": "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ...",
+    },
+    {
+        "url": "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+        "anchor": "step-3-enable-an-admin-api-key",
+        "chunk_num": 0,
+        "text": "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ...",
+    },
+]
+
+import re
+import unicodedata
+
+def normalize(text):
+    text = unicodedata.normalize("NFKC", text)
+    text = text.translate(dict.fromkeys(map(ord, "​‌‍­")))
+    return re.sub(r"\s+", " ", text).strip()
+# @hide-end
+
+# @block-start create-collection
+MODEL = "sentence-transformers/all-MiniLM-L6-v2"
+PIPELINE = "docs-prep-pipeline-v1"
+COLLECTION = "docs-sync-tutorial"
+
+client.create_collection(
+    COLLECTION,
+    vectors_config=models.VectorParams(
+        size=384,  # all-MiniLM-L6-v2 output dimension
+        distance=models.Distance.COSINE,
+    ),
+    metadata={"embedding_model": MODEL, "pipeline_version": PIPELINE},
+)
+# @block-end create-collection
+
+# @block-start check-gate
+def check_gate():
+    # compare this pipeline's constants against what the collection records about itself
+    meta = client.get_collection(COLLECTION).config.metadata or {}
+
+    if meta.get("embedding_model") != MODEL or meta.get("pipeline_version") != PIPELINE:
+        raise RuntimeError(f"collection was built by {meta}: full re-embed into a fresh collection required")
+# @block-end check-gate
+
+# @block-start identity-and-fingerprint
+import hashlib
+import uuid
+from datetime import datetime, timezone
+
+def content_hash(text):
+    return hashlib.sha256(text.encode()).hexdigest()
+
+def point_id(url, anchor, num):
+    # NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+    return str(uuid.uuid5(uuid.NAMESPACE_URL, f"{url}#{anchor}::{num}"))
+
+def prepare_chunks_for_sync(chunks):
+    """Derive both values (and the section address) for every raw chunk."""
+    out = []
+    for c in chunks:
+        text = normalize(c["text"])
+        out.append({
+            **c,
+            "text": text,
+            "section_url": f"{c['url']}#{c['anchor']}" if c["anchor"] else c["url"],
+            "content_hash": content_hash(text),
+            "point_id": point_id(c["url"], c["anchor"], c["chunk_num"]),
+        })
+    return out
+# @block-end identity-and-fingerprint
+
+# @block-start payload
+def payload(chunk, last_updated=None):
+    return {
+        "url": chunk["url"],
+        "anchor": chunk["anchor"],
+        "chunk_num": chunk["chunk_num"],
+        "section_url": chunk["section_url"],
+        "text": chunk["text"],
+        "content_hash": chunk["content_hash"],
+        "last_updated": last_updated or datetime.now(timezone.utc).isoformat(timespec="seconds"),
+    }
+# @block-end payload
+
+# @block-start payload-indexes
+for field in ("content_hash", "url", "section_url"):
+    client.create_payload_index(COLLECTION, field, models.PayloadSchemaType.KEYWORD)
+# @block-end payload-indexes
+
+# @block-start populate
+client.upsert(COLLECTION, points=[
+    models.PointStruct(
+        id=c["point_id"],
+        vector=models.Document(text=c["text"], model=MODEL),
+        payload=payload(c),
+    )
+    for c in prepare_chunks_for_sync(CHUNKS)
+], wait=True)
+# @block-end populate
+
+# @block-start search
+QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
+
+client.query_points(
+    COLLECTION,
+    query=models.Document(text=QUERY, model=MODEL),
+    limit=3,
+    with_payload=["section_url", "text"],
+)
+# @block-end search
+
+# @hide-start
+# the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+LATEST_CHUNKS = prepare_chunks_for_sync(CHUNKS)
+# @hide-end
+
+# @block-start split-by-state
+def split_by_state(latest_chunks):
+    """Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown."""
+    incoming = {c["point_id"]: c for c in latest_chunks}
+
+    stored = {}
+    points = client.retrieve(
+        COLLECTION,
+        ids=list(incoming),
+        with_payload=["content_hash"],
+        with_vectors=False,
+    )
+    for p in points:
+        stored[str(p.id)] = p.payload["content_hash"]
+
+    unchanged, content_changed, unknown_ids = [], [], []
+    for pid, c in incoming.items():
+        if stored.get(pid) == c["content_hash"]:
+            unchanged.append(c)
+        elif pid in stored:
+            content_changed.append(c)
+        else:
+            unknown_ids.append(c)
+
+    return incoming, unchanged, content_changed, unknown_ids
+
+incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(LATEST_CHUNKS)
+# @block-end split-by-state
+
+# @block-start re-embed-changed
+def re_embed_changed(content_changed):
+    if not content_changed:
+        return
+    client.upsert(COLLECTION,
+        points=[
+            models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            for c in content_changed],
+        wait=True)
+# @block-end re-embed-changed
+
+# @block-start reuse-or-add
+def reuse_or_add(unknown_ids):
+    """Reuse an existing embedding when the same text is already stored; embed only what is new."""
+    reused, added = 0, 0
+
+    for c in unknown_ids:
+        same_text = models.Filter(must=[
+            models.FieldCondition(
+                key="content_hash",
+                match=models.MatchValue(value=c["content_hash"]),
+            )
+        ])
+        hits, _ = client.scroll(
+            COLLECTION,
+            scroll_filter=same_text,
+            limit=1,
+            with_payload=["last_updated"],
+            with_vectors=True,
+        )
+
+        if hits:  # same text, new address: copy the vector, keep its last_updated
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=hits[0].vector,
+                payload=payload(c, hits[0].payload["last_updated"]),
+            )
+            reused += 1
+        else:     # genuinely new content: embed and insert
+            point = models.PointStruct(
+                id=c["point_id"],
+                vector=models.Document(text=c["text"], model=MODEL),
+                payload=payload(c),
+            )
+            added += 1
+
+        client.upsert(COLLECTION, points=[point], wait=True)
+
+    return reused, added
+# @block-end reuse-or-add
+
+# @block-start delete-gone
+def delete_gone(incoming_ids):
+    """Remove every point the current crawl no longer contains. Returns how many."""
+    if not incoming_ids:
+        raise ValueError("Refusing to delete from an empty source snapshot.")
+
+    stale = models.Filter(must_not=[models.HasIdCondition(has_id=list(incoming_ids))])
+
+    to_delete = client.count(COLLECTION, count_filter=stale).count
+
+    # potential check against a threshold to avoid accidental mass deletion could be added here
+    client.delete(COLLECTION, points_selector=models.FilterSelector(filter=stale), wait=True)
+    return to_delete
+# @block-end delete-gone
+
+# @block-start sync
+def sync(latest_chunks):
+    check_gate()  # refuse to mix embedding models or pipeline versions
+
+    chunks = prepare_chunks_for_sync(latest_chunks)
+    incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(chunks)
+
+    re_embed_changed(content_changed)
+    reused, added = reuse_or_add(unknown_ids)
+    deleted = delete_gone(incoming_ids)
+
+    return {
+        "unchanged": len(unchanged),
+        "re-embedded": len(content_changed),
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    }
+# @block-end sync
+
+# @block-start run-sync
+run = sync(LATEST_CHUNKS)
+print(run)
+# @block-end run-sync

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/rust.rs

@@ -0,0 +1,397 @@
+use serde_json::{json, Value};
+use std::collections::HashMap;
+
+use qdrant_client::qdrant::{
+    point_id::PointIdOptions, vector_output, vectors_output, Condition, CountPointsBuilder,
+    CreateCollectionBuilder, CreateFieldIndexCollectionBuilder, DeletePointsBuilder, Distance,
+    Document, FieldType, Filter, GetPointsBuilder, PayloadIncludeSelector, PointId, PointStruct,
+    Query, QueryPointsBuilder, ScrollPointsBuilder, UpsertPointsBuilder, VectorParamsBuilder,
+};
+use qdrant_client::{Payload, Qdrant};
+use sha2::{Digest, Sha256};
+
+pub async fn main() -> anyhow::Result<()> {
+    // @block-start client-connection
+    let qdrant_url = std::env::var("QDRANT_URL")?;
+    let qdrant_api_key = std::env::var("QDRANT_API_KEY")?;
+
+    let client = Qdrant::from_url(&qdrant_url)
+        .api_key(qdrant_api_key)
+        .build()?;
+    // @block-end client-connection
+
+    // @hide-start
+    // data and text normalization are not the lesson of this tutorial:
+    // the full CHUNKS list and normalize() live in the tutorial notebook
+    #[derive(Clone, Default)]
+    struct Chunk {
+        url: String,
+        anchor: String,
+        chunk_num: u32,
+        text: String,
+        section_url: String,
+        content_hash: String,
+        point_id: String,
+    }
+
+    let chunks: Vec<Chunk> = vec![
+        Chunk {
+            url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/".into(),
+            anchor: "prerequisites".into(),
+            chunk_num: 0,
+            text: "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ...".into(),
+            ..Default::default()
+        },
+        Chunk {
+            url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/".into(),
+            anchor: "step-3-enable-an-admin-api-key".into(),
+            chunk_num: 0,
+            text: "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ...".into(),
+            ..Default::default()
+        },
+    ];
+
+    fn normalize(text: &str) -> String {
+        text.split_whitespace().collect::<Vec<_>>().join(" ")
+    }
+    // @hide-end
+
+    // @block-start create-collection
+    const MODEL: &str = "sentence-transformers/all-MiniLM-L6-v2";
+    const PIPELINE: &str = "docs-prep-pipeline-v1";
+    const COLLECTION: &str = "docs-sync-tutorial";
+
+    let mut metadata: HashMap<String, Value> = HashMap::new();
+    metadata.insert("embedding_model".to_string(), json!(MODEL));
+    metadata.insert("pipeline_version".to_string(), json!(PIPELINE));
+
+    client
+        .create_collection(
+            CreateCollectionBuilder::new(COLLECTION)
+                .vectors_config(VectorParamsBuilder::new(
+                    384, // all-MiniLM-L6-v2 output dimension
+                    Distance::Cosine,
+                ))
+                .metadata(metadata),
+        )
+        .await?;
+    // @block-end create-collection
+
+    // @block-start check-gate
+    async fn check_gate(client: &Qdrant) -> anyhow::Result<()> {
+        // compare this pipeline's constants against what the collection records about itself
+        let meta = client
+            .collection_info(COLLECTION)
+            .await?
+            .result
+            .and_then(|info| info.config)
+            .map(|config| config.metadata)
+            .unwrap_or_default();
+
+        if meta.get("embedding_model").and_then(|v| v.as_str()).map(String::as_str) != Some(MODEL)
+            || meta.get("pipeline_version").and_then(|v| v.as_str()).map(String::as_str)
+                != Some(PIPELINE)
+        {
+            anyhow::bail!(
+                "collection was built by {meta:?}: full re-embed into a fresh collection required"
+            );
+        }
+        Ok(())
+    }
+    // @block-end check-gate
+
+    // @block-start identity-and-fingerprint
+    fn content_hash(text: &str) -> String {
+        Sha256::digest(text.as_bytes())
+            .iter()
+            .map(|byte| format!("{byte:02x}"))
+            .collect()
+    }
+
+    fn point_id(url: &str, anchor: &str, num: u32) -> String {
+        // NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
+        uuid::Uuid::new_v5(
+            &uuid::Uuid::NAMESPACE_URL,
+            format!("{url}#{anchor}::{num}").as_bytes(),
+        )
+        .to_string()
+    }
+
+    /// Derive both values (and the section address) for every raw chunk.
+    fn prepare_chunks_for_sync(chunks: &[Chunk]) -> Vec<Chunk> {
+        chunks
+            .iter()
+            .map(|c| {
+                let text = normalize(&c.text);
+                Chunk {
+                    text: text.clone(),
+                    section_url: if c.anchor.is_empty() {
+                        c.url.clone()
+                    } else {
+                        format!("{}#{}", c.url, c.anchor)
+                    },
+                    content_hash: content_hash(&text),
+                    point_id: point_id(&c.url, &c.anchor, c.chunk_num),
+                    ..c.clone()
+                }
+            })
+            .collect()
+    }
+    // @block-end identity-and-fingerprint
+
+    // @block-start payload
+    fn payload(chunk: &Chunk, last_updated: Option<String>) -> anyhow::Result<Payload> {
+        let last_updated = last_updated.unwrap_or_else(|| {
+            chrono::Utc::now().to_rfc3339_opts(chrono::SecondsFormat::Secs, false)
+        });
+        Ok(Payload::try_from(serde_json::json!({
+            "url": chunk.url,
+            "anchor": chunk.anchor,
+            "chunk_num": chunk.chunk_num,
+            "section_url": chunk.section_url,
+            "text": chunk.text,
+            "content_hash": chunk.content_hash,
+            "last_updated": last_updated,
+        }))?)
+    }
+    // @block-end payload
+
+    // @block-start payload-indexes
+    for field in ["content_hash", "url", "section_url"] {
+        client
+            .create_field_index(CreateFieldIndexCollectionBuilder::new(
+                COLLECTION,
+                field,
+                FieldType::Keyword,
+            ))
+            .await?;
+    }
+    // @block-end payload-indexes
+
+    // @block-start populate
+    let points: Vec<PointStruct> = prepare_chunks_for_sync(&chunks)
+        .iter()
+        .map(|c| {
+            Ok(PointStruct::new(
+                c.point_id.clone(),
+                Document::new(&c.text, MODEL),
+                payload(c, None)?,
+            ))
+        })
+        .collect::<anyhow::Result<_>>()?;
+
+    client
+        .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+        .await?;
+    // @block-end populate
+
+    // @block-start search
+    const QUERY: &str = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+    client
+        .query(
+            QueryPointsBuilder::new(COLLECTION)
+                .query(Query::new_nearest(Document::new(QUERY, MODEL)))
+                .limit(3)
+                .with_payload(PayloadIncludeSelector::new(vec![
+                    "section_url".to_string(),
+                    "text".to_string(),
+                ])),
+        )
+        .await?;
+    // @block-end search
+
+    // @hide-start
+    // the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+    let latest_chunks = prepare_chunks_for_sync(&chunks);
+    // @hide-end
+
+    // @block-start split-by-state
+    /// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+    async fn split_by_state(
+        client: &Qdrant,
+        latest_chunks: &[Chunk],
+    ) -> anyhow::Result<(HashMap<String, Chunk>, Vec<Chunk>, Vec<Chunk>, Vec<Chunk>)> {
+        let incoming: HashMap<String, Chunk> = latest_chunks
+            .iter()
+            .map(|c| (c.point_id.clone(), c.clone()))
+            .collect();
+
+        let ids: Vec<PointId> = incoming.keys().map(|id| id.as_str().into()).collect();
+        let points = client
+            .get_points(
+                GetPointsBuilder::new(COLLECTION, ids)
+                    .with_payload(PayloadIncludeSelector::new(vec!["content_hash".to_string()]))
+                    .with_vectors(false),
+            )
+            .await?;
+
+        let mut stored: HashMap<String, String> = HashMap::new();
+        for p in points.result {
+            let hash = p.get("content_hash").as_str().cloned();
+            if let (Some(PointIdOptions::Uuid(id)), Some(hash)) =
+                (p.id.and_then(|i| i.point_id_options), hash)
+            {
+                stored.insert(id, hash);
+            }
+        }
+
+        let (mut unchanged, mut content_changed, mut unknown_ids) =
+            (Vec::new(), Vec::new(), Vec::new());
+        for (pid, c) in &incoming {
+            if stored.get(pid) == Some(&c.content_hash) {
+                unchanged.push(c.clone());
+            } else if stored.contains_key(pid) {
+                content_changed.push(c.clone());
+            } else {
+                unknown_ids.push(c.clone());
+            }
+        }
+
+        Ok((incoming, unchanged, content_changed, unknown_ids))
+    }
+
+    let (incoming_ids, unchanged, content_changed, unknown_ids) =
+        split_by_state(&client, &latest_chunks).await?;
+    // @block-end split-by-state
+
+    // @hide-start
+    _ = (&incoming_ids, &unchanged, &content_changed, &unknown_ids);
+    // @hide-end
+
+    // @block-start re-embed-changed
+    async fn re_embed_changed(client: &Qdrant, content_changed: &[Chunk]) -> anyhow::Result<()> {
+        if content_changed.is_empty() {
+            return Ok(());
+        }
+        let points: Vec<PointStruct> = content_changed
+            .iter()
+            .map(|c| {
+                Ok(PointStruct::new(
+                    c.point_id.clone(),
+                    Document::new(&c.text, MODEL),
+                    payload(c, None)?,
+                ))
+            })
+            .collect::<anyhow::Result<_>>()?;
+
+        client
+            .upsert_points(UpsertPointsBuilder::new(COLLECTION, points).wait(true))
+            .await?;
+        Ok(())
+    }
+    // @block-end re-embed-changed
+
+    // @block-start reuse-or-add
+    /// Reuse an existing embedding when the same text is already stored; embed only what is new.
+    async fn reuse_or_add(client: &Qdrant, unknown_ids: &[Chunk]) -> anyhow::Result<(usize, usize)> {
+        let (mut reused, mut added) = (0, 0);
+
+        for c in unknown_ids {
+            let same_text =
+                Filter::must([Condition::matches("content_hash", c.content_hash.clone())]);
+            let hits = client
+                .scroll(
+                    ScrollPointsBuilder::new(COLLECTION)
+                        .filter(same_text)
+                        .limit(1)
+                        .with_payload(PayloadIncludeSelector::new(vec![
+                            "last_updated".to_string()
+                        ]))
+                        .with_vectors(true),
+                )
+                .await?
+                .result;
+
+            let point = if let Some(hit) = hits.into_iter().next() {
+                // same text, new address: copy the vector, keep its last_updated
+                let last_updated = hit.get("last_updated").as_str().cloned();
+                let vector: Vec<f32> = match hit.vectors.and_then(|v| v.vectors_options) {
+                    Some(vectors_output::VectorsOptions::Vector(v)) => match v.vector {
+                        Some(vector_output::Vector::Dense(dense)) => dense.data,
+                        _ => anyhow::bail!("expected a dense vector on the stored point"),
+                    },
+                    _ => anyhow::bail!("expected a dense vector on the stored point"),
+                };
+                reused += 1;
+                PointStruct::new(c.point_id.clone(), vector, payload(c, last_updated)?)
+            } else {
+                // genuinely new content: embed and insert
+                added += 1;
+                PointStruct::new(
+                    c.point_id.clone(),
+                    Document::new(&c.text, MODEL),
+                    payload(c, None)?,
+                )
+            };
+
+            client
+                .upsert_points(UpsertPointsBuilder::new(COLLECTION, vec![point]).wait(true))
+                .await?;
+        }
+
+        Ok((reused, added))
+    }
+    // @block-end reuse-or-add
+
+    // @block-start delete-gone
+    /// Remove every point the current crawl no longer contains. Returns how many.
+    async fn delete_gone(
+        client: &Qdrant,
+        incoming_ids: &HashMap<String, Chunk>,
+    ) -> anyhow::Result<u64> {
+        if incoming_ids.is_empty() {
+            anyhow::bail!("Refusing to delete from an empty source snapshot.");
+        }
+
+        let stale = Filter::must_not([Condition::has_id(
+            incoming_ids.keys().map(|id| PointId::from(id.as_str())),
+        )]);
+
+        let to_delete = client
+            .count(CountPointsBuilder::new(COLLECTION).filter(stale.clone()))
+            .await?
+            .result
+            .map(|r| r.count)
+            .unwrap_or(0);
+
+        // potential check against a threshold to avoid accidental mass deletion could be added here
+        client
+            .delete_points(DeletePointsBuilder::new(COLLECTION).points(stale).wait(true))
+            .await?;
+        Ok(to_delete)
+    }
+    // @block-end delete-gone
+
+    // @block-start sync
+    async fn sync(
+        client: &Qdrant,
+        latest_chunks: &[Chunk],
+    ) -> anyhow::Result<HashMap<&'static str, usize>> {
+        check_gate(client).await?; // refuse to mix embedding models or pipeline versions
+
+        let chunks = prepare_chunks_for_sync(latest_chunks);
+        let (incoming_ids, unchanged, content_changed, unknown_ids) =
+            split_by_state(client, &chunks).await?;
+
+        re_embed_changed(client, &content_changed).await?;
+        let (reused, added) = reuse_or_add(client, &unknown_ids).await?;
+        let deleted = delete_gone(client, &incoming_ids).await?;
+
+        Ok(HashMap::from([
+            ("unchanged", unchanged.len()),
+            ("re-embedded", content_changed.len()),
+            ("reused_embedding", reused),
+            ("added", added),
+            ("deleted", deleted as usize),
+        ]))
+    }
+    // @block-end sync
+
+    // @block-start run-sync
+    let run = sync(&client, &latest_chunks).await?;
+    println!("{run:?}");
+    // @block-end run-sync
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/tutorial-incremental-embedding-updates/typescript.ts

@@ -0,0 +1,288 @@
+// @block-start client-connection
+import { QdrantClient, Schemas } from "@qdrant/js-client-rest";
+
+const QDRANT_URL = process.env.QDRANT_URL;
+const QDRANT_API_KEY = process.env.QDRANT_API_KEY;
+
+const client = new QdrantClient({
+    url: QDRANT_URL,
+    apiKey: QDRANT_API_KEY,
+});
+// @block-end client-connection
+
+// @hide-start
+// data and text normalization are not the lesson of this tutorial:
+// the full CHUNKS list and normalize() live in the tutorial notebook
+const CHUNKS = [
+    {
+        url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+        anchor: "prerequisites",
+        chunk_num: 0,
+        text: "Prerequisites - Docker and Docker Compose installed - `curl` available in your terminal ...",
+    },
+    {
+        url: "https://qdrant.tech/documentation/tutorials-operations/secure-qdrant/",
+        anchor: "step-3-enable-an-admin-api-key",
+        chunk_num: 0,
+        text: "Step 3: Enable an Admin API Key Without enabling authentication, anyone with network access ...",
+    },
+];
+
+function normalize(text: string): string {
+    return text
+        .normalize("NFKC")
+        .replace(/[\u200B\u200C\u200D\uFEFF\u00AD]/g, "")
+        .replace(/\s+/g, " ")
+        .trim();
+}
+// @hide-end
+
+// @block-start create-collection
+const MODEL = "sentence-transformers/all-MiniLM-L6-v2";
+const PIPELINE = "docs-prep-pipeline-v1";
+const COLLECTION = "docs-sync-tutorial";
+
+await client.createCollection(COLLECTION, {
+    vectors: {
+        size: 384, // all-MiniLM-L6-v2 output dimension
+        distance: "Cosine",
+    },
+});
+
+await client.updateCollection(COLLECTION, {
+    metadata: { embedding_model: MODEL, pipeline_version: PIPELINE },
+});
+// @block-end create-collection
+
+// @block-start check-gate
+async function checkGate() {
+    // compare this pipeline's constants against what the collection records about itself
+    const meta = ((await client.getCollection(COLLECTION)).config.metadata ??
+        {}) as Record<string, unknown>;
+
+    if (meta.embedding_model !== MODEL || meta.pipeline_version !== PIPELINE) {
+        throw new Error(`collection was built by ${JSON.stringify(meta)}: full re-embed into a fresh collection required`);
+    }
+}
+// @block-end check-gate
+
+// @block-start identity-and-fingerprint
+import { createHash } from "node:crypto";
+
+type RawChunk = { url: string; anchor: string; chunk_num: number; text: string };
+type SyncChunk = RawChunk & { section_url: string; content_hash: string; point_id: string };
+
+function contentHash(text: string): string {
+    return createHash("sha256").update(text).digest("hex");
+}
+
+// NAMESPACE_URL is a fixed constant name-based (v5) UUIDs require; it marks the input as a URL-like name
+function pointId(url: string, anchor: string, num: number): string {
+    // Qdrant accepts any well-formed UUID as a point ID:
+    // hash the address, format the digest as a UUID, and the same address always yields the same ID
+    const hex = createHash("sha256").update(`${url}#${anchor}::${num}`).digest("hex");
+    return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20, 32)}`;
+}
+
+// Derive both values (and the section address) for every raw chunk.
+function prepareChunksForSync(chunks: RawChunk[]): SyncChunk[] {
+    return chunks.map((c) => {
+        const text = normalize(c.text);
+        return {
+            ...c,
+            text,
+            section_url: c.anchor ? `${c.url}#${c.anchor}` : c.url,
+            content_hash: contentHash(text),
+            point_id: pointId(c.url, c.anchor, c.chunk_num),
+        };
+    });
+}
+// @block-end identity-and-fingerprint
+
+// @block-start payload
+function payload(chunk: SyncChunk, lastUpdated?: string) {
+    return {
+        url: chunk.url,
+        anchor: chunk.anchor,
+        chunk_num: chunk.chunk_num,
+        section_url: chunk.section_url,
+        text: chunk.text,
+        content_hash: chunk.content_hash,
+        last_updated: lastUpdated ?? new Date().toISOString().replace(/\.\d+Z$/, "Z"),
+    };
+}
+// @block-end payload
+
+// @block-start payload-indexes
+for (const field of ["content_hash", "url", "section_url"]) {
+    await client.createPayloadIndex(COLLECTION, {
+        field_name: field,
+        field_schema: "keyword",
+    });
+}
+// @block-end payload-indexes
+
+// @block-start populate
+await client.upsert(COLLECTION, {
+    points: prepareChunksForSync(CHUNKS).map((c) => ({
+        id: c.point_id,
+        vector: { text: c.text, model: MODEL },
+        payload: payload(c),
+    })),
+    wait: true,
+});
+// @block-end populate
+
+// @block-start search
+const QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?";
+
+await client.query(COLLECTION, {
+    query: { text: QUERY, model: MODEL },
+    limit: 3,
+    with_payload: ["section_url", "text"],
+});
+// @block-end search
+
+// @hide-start
+// the simulated month of edits (LATEST_CHUNKS) is spelled out in the tutorial and the notebook
+const LATEST_CHUNKS = prepareChunksForSync(CHUNKS);
+// @hide-end
+
+// @block-start split-by-state
+// Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown.
+async function splitByState(latestChunks: SyncChunk[]) {
+    const incoming = new Map(latestChunks.map((c) => [c.point_id, c]));
+
+    const stored = new Map<string, string>();
+    const points = await client.retrieve(COLLECTION, {
+        ids: [...incoming.keys()],
+        with_payload: ["content_hash"],
+        with_vector: false,
+    });
+    for (const p of points) {
+        stored.set(String(p.id), p.payload?.content_hash as string);
+    }
+
+    const unchanged: SyncChunk[] = [];
+    const contentChanged: SyncChunk[] = [];
+    const unknownIds: SyncChunk[] = [];
+    for (const [pid, c] of incoming) {
+        if (stored.get(pid) === c.content_hash) {
+            unchanged.push(c);
+        } else if (stored.has(pid)) {
+            contentChanged.push(c);
+        } else {
+            unknownIds.push(c);
+        }
+    }
+
+    return { incoming, unchanged, contentChanged, unknownIds };
+}
+
+const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(LATEST_CHUNKS);
+// @block-end split-by-state
+
+// @block-start re-embed-changed
+async function reEmbedChanged(contentChanged: SyncChunk[]) {
+    if (contentChanged.length === 0) {
+        return;
+    }
+    await client.upsert(COLLECTION, {
+        points: contentChanged.map((c) => ({
+            id: c.point_id,
+            vector: { text: c.text, model: MODEL },
+            payload: payload(c),
+        })),
+        wait: true,
+    });
+}
+// @block-end re-embed-changed
+
+// @block-start reuse-or-add
+// Reuse an existing embedding when the same text is already stored; embed only what is new.
+async function reuseOrAdd(unknownIds: SyncChunk[]) {
+    let reused = 0;
+    let added = 0;
+
+    for (const c of unknownIds) {
+        const sameText = {
+            must: [
+                {
+                    key: "content_hash",
+                    match: { value: c.content_hash },
+                },
+            ],
+        };
+        const hits = (await client.scroll(COLLECTION, {
+            filter: sameText,
+            limit: 1,
+            with_payload: ["last_updated"],
+            with_vector: true,
+        })).points;
+
+        let point: Schemas["PointStruct"];
+        if (hits.length > 0) { // same text, new address: copy the vector, keep its last_updated
+            point = {
+                id: c.point_id,
+                vector: hits[0].vector as number[],
+                payload: payload(c, hits[0].payload?.last_updated as string),
+            };
+            reused += 1;
+        } else { // genuinely new content: embed and insert
+            point = {
+                id: c.point_id,
+                vector: { text: c.text, model: MODEL },
+                payload: payload(c),
+            };
+            added += 1;
+        }
+
+        await client.upsert(COLLECTION, { points: [point], wait: true });
+    }
+
+    return { reused, added };
+}
+// @block-end reuse-or-add
+
+// @block-start delete-gone
+// Remove every point the current crawl no longer contains. Returns how many.
+async function deleteGone(incoming: Map<string, SyncChunk>) {
+    if (incoming.size === 0) {
+        throw new Error("Refusing to delete from an empty source snapshot.");
+    }
+
+    const stale = { must_not: [{ has_id: [...incoming.keys()] }] };
+
+    const toDelete = (await client.count(COLLECTION, { filter: stale })).count;
+
+    // potential check against a threshold to avoid accidental mass deletion could be added here
+    await client.delete(COLLECTION, { filter: stale, wait: true });
+    return toDelete;
+}
+// @block-end delete-gone
+
+// @block-start sync
+async function sync(latestChunks: RawChunk[]) {
+    await checkGate(); // refuse to mix embedding models or pipeline versions
+
+    const chunks = prepareChunksForSync(latestChunks);
+    const { incoming, unchanged, contentChanged, unknownIds } = await splitByState(chunks);
+
+    await reEmbedChanged(contentChanged);
+    const { reused, added } = await reuseOrAdd(unknownIds);
+    const deleted = await deleteGone(incoming);
+
+    return {
+        "unchanged": unchanged.length,
+        "re-embedded": contentChanged.length,
+        "reused_embedding": reused,
+        "added": added,
+        "deleted": deleted,
+    };
+}
+// @block-end sync
+
+// @block-start run-sync
+const run = await sync(LATEST_CHUNKS);
+console.log(run);
+// @block-end run-sync

qdrant-landing/content/documentation/tutorials-operations/incremental-embedding-updates.md

@@ -35,27 +35,13 @@ The tutorial has an accompanying [notebook](https://github.com/qdrant/examples/b
 
 ## Prerequisites
 
-```python
-%pip install -q "qdrant-client>=1.18"
-```
+Install the [Qdrant client of your choice](/documentation/interfaces/#client-libraries).
 
 We use Qdrant Cloud and its [Free Embedding Inference](/documentation/cloud/inference/#free-embedding-models).  
 Create a Free Tier [Qdrant Cloud cluster](https://cloud.qdrant.io/) and set `QDRANT_URL` and `QDRANT_API_KEY` in your environment.
 
 
-```python
-import os
-from qdrant_client import QdrantClient, models
-
-QDRANT_URL = os.getenv("QDRANT_URL")
-QDRANT_API_KEY = os.getenv("QDRANT_API_KEY")
-
-client = QdrantClient(
-    url=QDRANT_URL,
-    api_key=QDRANT_API_KEY,
-    cloud_inference=True
-)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="client-connection" >}}
 
 ## The Data: Qdrant Documentation
 
@@ -133,31 +119,11 @@ Vectors produced by different embedding models, or by the same model over differ
 
 Let's consider a simple guardrail: save which model and which pipeline version produced the data points, in [**collection metadata**](/documentation/manage-data/collections/#collection-metadata), and verify against it. If one of the two changed, we need to trigger full collection re-embedding.
 
-```python
-MODEL = "sentence-transformers/all-MiniLM-L6-v2"
-PIPELINE = "docs-prep-pipeline-v1"
-COLLECTION = "docs-sync-tutorial"
-
-client.create_collection(
-    COLLECTION,
-    vectors_config=models.VectorParams(
-        size=384,  # all-MiniLM-L6-v2 output dimension
-        distance=models.Distance.COSINE,
-    ),
-    metadata={"embedding_model": MODEL, "pipeline_version": PIPELINE},
-)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="create-collection" >}}
 
 The gate against mixing embedding generations is then a simple check at the start of every run:
 
-```python
-def check_gate():
-    # compare this pipeline's constants against what the collection records about itself
-    meta = client.get_collection(COLLECTION).config.metadata or {}
-
-    if meta.get("embedding_model") != MODEL or meta.get("pipeline_version") != PIPELINE:
-        raise RuntimeError(f"collection was built by {meta}: full re-embed into a fresh collection required")
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="check-gate" >}}
 
 ## Characteristics of a Document Chunk
 
@@ -174,32 +140,7 @@ Hence every record should get two derived values:
 - **Content fingerprint**, like SHA-256 of the text. It changes if a single character changes, and never otherwise. Comparing fingerprints answers "*Is it the same content?*" without comparing texts.
 - **Deterministic ID** for position in documentation. For example, `url + "#" + anchor + "::" + chunk_num` turned into a UUID, one of the two point ID formats Qdrant accepts. Comparing IDs answers "*Is this content still at the same position?*".
 
-```python
-import hashlib
-import uuid
-from datetime import datetime, timezone
-
-def content_hash(text):
-    return hashlib.sha256(text.encode()).hexdigest()
-
-def point_id(url, anchor, num):
-    # NAMESPACE_URL is a fixed constant uuid5 requires; it marks the input as a URL-like name
-    return str(uuid.uuid5(uuid.NAMESPACE_URL, f"{url}#{anchor}::{num}"))
-
-def prepare_chunks_for_sync(chunks):
-    """Derive both values (and the section address) for every raw chunk."""
-    out = []
-    for c in chunks:
-        text = normalize(c["text"])
-        out.append({
-            **c,
-            "text": text,
-            "section_url": f"{c['url']}#{c['anchor']}" if c["anchor"] else c["url"],
-            "content_hash": content_hash(text),
-            "point_id": point_id(c["url"], c["anchor"], c["chunk_num"]),
-        })
-    return out
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="identity-and-fingerprint" >}}
 Example:
 
 ```text
@@ -218,56 +159,24 @@ Additionally, a point can be described by the following fields:
 <details>
 <summary>payload() implementation</summary>
 
-```python
-def payload(chunk, last_updated=None):
-    return {
-        "url": chunk["url"],
-        "anchor": chunk["anchor"],
-        "chunk_num": chunk["chunk_num"],
-        "section_url": chunk["section_url"],
-        "text": chunk["text"],
-        "content_hash": chunk["content_hash"],
-        "last_updated": last_updated or datetime.now(timezone.utc).isoformat(timespec="seconds"),
-    }
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="payload" >}}
 
 </details>
 
 For all the payload fields used for filtering or grouping we need to create a [**payload index**](/documentation/manage-data/indexing/).
 
-```python
-for field in ("content_hash", "url", "section_url"):
-    client.create_payload_index(COLLECTION, field, models.PayloadSchemaType.KEYWORD)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="payload-indexes" >}}
 
 ## Populate Collection
 
 Populate the collection with the whole documentation.
 
-```python
-client.upsert(COLLECTION, points=[
-    models.PointStruct(
-        id=c["point_id"],
-        vector=models.Document(text=c["text"], model=MODEL),  # Cloud Inference embeds text server-side
-        payload=payload(c),
-    )
-    for c in prepare_chunks_for_sync(CHUNKS)
-], wait=True)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="populate" >}}
 
 <details>
 <summary>Test the search against it</summary>
 
-```python
-QUERY = "Where exactly to set `QDRANT__SERVICE__API_KEY` variable to enable authentication for a self-hosted Qdrant?"
-
-client.query_points(
-    COLLECTION,
-    query=models.Document(text=QUERY, model=MODEL),
-    limit=3,
-    with_payload=["section_url", "text"],
-)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="search" >}}
 
 You should get something like:
 
@@ -354,35 +263,7 @@ We now check every incoming chunk against the collection: does its ID (address)
 
 [`retrieve`](/documentation/manage-data/points/) fetches points by ID. At corpus scale you would batch the IDs.
 
-```python
-def split_by_state(latest_chunks):
-    """Compare the incoming chunk list to the collection: who is unchanged, changed, or unknown."""
-    incoming = {c["point_id"]: c for c in latest_chunks}
-
-    stored = {}
-    points = client.retrieve(
-        COLLECTION,
-        ids=list(incoming),
-        with_payload=["content_hash"],
-        with_vectors=False,
-    )
-    for p in points:
-        stored[str(p.id)] = p.payload["content_hash"]
-
-    unchanged, content_changed, unknown_ids = [], [], []
-    for pid, c in incoming.items():
-        if stored.get(pid) == c["content_hash"]:
-            unchanged.append(c)
-        elif pid in stored:
-            content_changed.append(c)
-        else:
-            unknown_ids.append(c)
-
-    return incoming, unchanged, content_changed, unknown_ids
-
-
-incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(LATEST_CHUNKS)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="split-by-state" >}}
 
 ### Case 1: Unchanged, Do Nothing
 
@@ -393,20 +274,7 @@ These chunks carry the same fingerprint as before.
 The chunk about Step 3 exists under a known ID (it didn't change its position on the docs website) but carries new information.  
 Use `upsert`: writing a point under an existing ID replaces it.
 
-```python
-def re_embed_changed(content_changed):
-    if not content_changed:
-        return
-    client.upsert(COLLECTION, 
-        points=[
-            models.PointStruct(
-                id=c["point_id"],
-                vector=models.Document(text=c["text"], model=MODEL),
-                payload=payload(c),
-            )
-            for c in content_changed], 
-        wait=True)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="re-embed-changed" >}}
 
 ### Cases 3 and 4: ID Is Not Present in the Collection
 
@@ -418,45 +286,7 @@ A filtered [`scroll`](/documentation/manage-data/points/) on `content_hash` answ
 
 **Note:** *This version performs one hash lookup per unknown chunk so the decision is easy to inspect. In production, batch hash lookups and point upserts.*
 
-```python
-def reuse_or_add(unknown_ids):
-    """Reuse an existing embedding when the same text is already stored; embed only what is new."""
-    reused, added = 0, 0
-
-    for c in unknown_ids:
-        same_text = models.Filter(must=[
-            models.FieldCondition(
-                key="content_hash",
-                match=models.MatchValue(value=c["content_hash"]),
-            )
-        ])
-        hits, _ = client.scroll(
-            COLLECTION,
-            scroll_filter=same_text,
-            limit=1,
-            with_payload=["last_updated"],
-            with_vectors=True,
-        )
-
-        if hits:  # same text, new address: copy the vector, keep its last_updated
-            point = models.PointStruct(
-                id=c["point_id"],
-                vector=hits[0].vector,
-                payload=payload(c, hits[0].payload["last_updated"]),
-            )
-            reused += 1
-        else:     # genuinely new content: embed and insert
-            point = models.PointStruct(
-                id=c["point_id"],
-                vector=models.Document(text=c["text"], model=MODEL),
-                payload=payload(c),
-            )
-            added += 1
-
-        client.upsert(COLLECTION, points=[point], wait=True)
-
-    return reused, added
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="reuse-or-add" >}}
 
 What's important to notice: the old points, the migration page under its old URL, are still in the collection. They need to be removed, and that is the last case.
 
@@ -471,51 +301,17 @@ Whatever LATEST_CHUNKS does not contain no longer exists at the source. The dele
 **Note:** Frequent re-embeddings and deletions don't degrade the index over time: background [optimizers](/documentation/ops-optimization/optimizer/) rebuild and merge index segments as changes accumulate.
 
 
-```python
-def delete_gone(incoming_ids):
-    """Remove every point the current crawl no longer contains. Returns how many."""
-    if not incoming_ids:
-        raise ValueError("Refusing to delete from an empty source snapshot.")
-
-    stale = models.Filter(must_not=[models.HasIdCondition(has_id=list(incoming_ids))])
-
-    to_delete = client.count(COLLECTION, count_filter=stale).count
-
-    # potential check against a threshold to avoid accidental mass deletion could be added here
-    client.delete(COLLECTION, points_selector=models.FilterSelector(filter=stale), wait=True)
-    return to_delete
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="delete-gone" >}}
 
 ## Run and Verify the Sync
 
 The five cases, assembled from the functions defined above:
 
-```python
-def sync(latest_chunks):
-    check_gate()  # refuse to mix embedding models or pipeline versions
-
-    chunks = prepare_chunks_for_sync(latest_chunks)
-    incoming_ids, unchanged, content_changed, unknown_ids = split_by_state(chunks)
-
-    re_embed_changed(content_changed)
-    reused, added = reuse_or_add(unknown_ids)
-    deleted = delete_gone(incoming_ids)
-
-    return {
-        "unchanged": len(unchanged),
-        "re-embedded": len(content_changed),
-        "reused_embedding": reused,
-        "added": added,
-        "deleted": deleted,
-    }
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="sync" >}}
 
 Run the sync.
 
-```python
-run = sync(LATEST_CHUNKS)
-print(run)
-```
+{{< code-snippet path="/documentation/headless/snippets/tutorial-incremental-embedding-updates/" block="run-sync" >}}
 
 You should see something like: