diff --git a/server/src/knowledge/acl.ts b/server/src/knowledge/acl.ts
deleted file mode 100644
index d9dc3e97..00000000
--- a/server/src/knowledge/acl.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import type { KnowledgeAclEntry, KnowledgeActor } from "./types";
-
-export function canRead(
-  actor: KnowledgeActor,
-  entries: KnowledgeAclEntry[],
-): boolean {
-  let allowed = false;
-
-  for (const entry of entries) {
-    if (!matchesPrincipal(actor, entry.principal)) continue;
-    if (entry.effect === "deny") return false;
-    allowed = true;
-  }
-
-  return allowed;
-}
-
-function matchesPrincipal(actor: KnowledgeActor, principal: string): boolean {
-  if (principal === `user:${actor.userId}`) return true;
-  if (!principal.startsWith("group:")) return false;
-  return actor.groups.includes(principal.slice("group:".length));
-}
diff --git a/server/src/knowledge/repository.ts b/server/src/knowledge/repository.ts
deleted file mode 100644
index 883cf9e3..00000000
--- a/server/src/knowledge/repository.ts
+++ /dev/null
@@ -1,57 +0,0 @@
-import { canRead } from "./acl";
-import type { KnowledgeAclEntry, KnowledgeActor } from "./types";
-
-type SourceChange = {
-  connectorInstanceId: string;
-  sourceId: string;
-  title: string;
-  canonicalUrl: string;
-  contentHash: string;
-  chunks: { position: number; content: string }[];
-  acls: KnowledgeAclEntry[];
-};
-
-type Citation = {
-  documentId: string;
-  title: string;
-  canonicalUrl: string;
-  chunkId: string;
-  content: string;
-};
-
-export class InMemoryKnowledgeRepository {
-  #sources = new Map<string, SourceChange>();
-  #deleted = new Set<string>();
-
-  apply(change: SourceChange) {
-    const key = sourceKey(change.connectorInstanceId, change.sourceId);
-    this.#sources.set(key, structuredClone(change));
-    this.#deleted.delete(key);
-  }
-
-  delete(connectorInstanceId: string, sourceId: string) {
-    this.#deleted.add(sourceKey(connectorInstanceId, sourceId));
-  }
-
-  documents(): SourceChange[] {
-    return [...this.#sources.values()].map((source) => structuredClone(source));
-  }
-
-  search(actor: KnowledgeActor): Citation[] {
-    return [...this.#sources.entries()].flatMap(([key, source]) => {
-      if (this.#deleted.has(key) || !canRead(actor, source.acls)) return [];
-      const documentId = key;
-      return source.chunks.map((chunk) => ({
-        documentId,
-        title: source.title,
-        canonicalUrl: source.canonicalUrl,
-        chunkId: `${documentId}:${chunk.position}`,
-        content: chunk.content,
-      }));
-    });
-  }
-}
-
-function sourceKey(connectorInstanceId: string, sourceId: string) {
-  return `${connectorInstanceId}:${sourceId}`;
-}
diff --git a/server/src/knowledge/types.ts b/server/src/knowledge/types.ts
deleted file mode 100644
index 5ef9b202..00000000
--- a/server/src/knowledge/types.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export type KnowledgeActor = {
-  userId: string;
-  groups: string[];
-};
-
-export type KnowledgeAclEntry = {
-  principal: string;
-  effect: "allow" | "deny";
-};
diff --git a/server/tests/knowledge-acl.test.ts b/server/tests/knowledge-acl.test.ts
deleted file mode 100644
index e7608922..00000000
--- a/server/tests/knowledge-acl.test.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-import { describe, expect, test } from "bun:test";
-import { canRead } from "../src/knowledge/acl";
-
-describe("knowledge ACL evaluation", () => {
-  test("allows a matching user principal", () => {
-    expect(
-      canRead({ userId: "u1", groups: [] }, [
-        { principal: "user:u1", effect: "allow" },
-      ]),
-    ).toBe(true);
-  });
-
-  test("fails closed for an unmatched or empty ACL", () => {
-    expect(
-      canRead({ userId: "u1", groups: ["finance"] }, [
-        { principal: "group:engineering", effect: "allow" },
-      ]),
-    ).toBe(false);
-    expect(canRead({ userId: "u1", groups: [] }, [])).toBe(false);
-  });
-
-  test("makes a matching deny override a matching allow", () => {
-    expect(
-      canRead({ userId: "u1", groups: ["finance"] }, [
-        { principal: "group:finance", effect: "allow" },
-        { principal: "user:u1", effect: "deny" },
-      ]),
-    ).toBe(false);
-  });
-});
diff --git a/server/tests/knowledge-repository.test.ts b/server/tests/knowledge-repository.test.ts
deleted file mode 100644
index d3863a1c..00000000
--- a/server/tests/knowledge-repository.test.ts
+++ /dev/null
@@ -1,51 +0,0 @@
-import { describe, expect, test } from "bun:test";
-import { InMemoryKnowledgeRepository } from "../src/knowledge/repository";
-
-const change = {
-  connectorInstanceId: "connector-1",
-  sourceId: "source-1",
-  title: "Finance policy",
-  canonicalUrl: "https://example.test/policy",
-  contentHash: "hash-1",
-  chunks: [{ position: 0, content: "finance content" }],
-  acls: [{ principal: "group:finance", effect: "allow" as const }],
-};
-
-describe("knowledge repository", () => {
-  test("replaces source content idempotently", () => {
-    const repository = new InMemoryKnowledgeRepository();
-    repository.apply(change);
-    repository.apply({
-      ...change,
-      contentHash: "hash-2",
-      chunks: [{ position: 0, content: "updated" }],
-    });
-
-    expect(repository.documents()).toEqual([
-      {
-        ...change,
-        contentHash: "hash-2",
-        chunks: [{ position: 0, content: "updated" }],
-      },
-    ]);
-  });
-
-  test("returns citations only to authorized actors and hides deleted sources", () => {
-    const repository = new InMemoryKnowledgeRepository();
-    repository.apply(change);
-    expect(repository.search({ userId: "u1", groups: ["finance"] })).toEqual([
-      {
-        documentId: "connector-1:source-1",
-        title: "Finance policy",
-        canonicalUrl: "https://example.test/policy",
-        chunkId: "connector-1:source-1:0",
-        content: "finance content",
-      },
-    ]);
-    expect(repository.search({ userId: "u2", groups: [] })).toEqual([]);
-    repository.delete("connector-1", "source-1");
-    expect(repository.search({ userId: "u1", groups: ["finance"] })).toEqual(
-      [],
-    );
-  });
-});