diff --git a/src/main/api-server/routes-files.ts b/src/main/api-server/routes-files.ts
index bae02baf..978f37e0 100644
--- a/src/main/api-server/routes-files.ts
+++ b/src/main/api-server/routes-files.ts
@@ -2,19 +2,6 @@ import { z } from "zod";
 import { IMPORTANT_DOC_TYPE_SET } from "@shared/document-categories";
 import { requireParam, type AgentApiServer } from "./server-core";
 
-type DocumentRow = {
-  id: string; companyId: string; type: string; title: string; content: string;
-  authorAgentId: string; reviewerAgentId: string | null; projectId: string | null;
-  goalId: string | null; parentDocId: string | null; version: number; status: string;
-  tagsJson: string; latestRevisionId: string | null; createdAt: string; updatedAt: string;
-};
-
-type DocumentLookupRow = {
-  id: string; companyId: string; type: string; title: string; content: string;
-  authorAgentId: string; reviewerAgentId: string | null; projectId: string | null;
-  goalId: string | null; version: number; status: string; tagsJson: string;
-};
-
 const createDocumentSchema = z.object({
   type: z.string().optional(),
   title: z.string().optional(),
@@ -171,10 +158,7 @@ export function registerFileRoutes(server: AgentApiServer) {
       server.json(res, 403, { error: "Company mismatch" });
       return;
     }
-    const docs = db.queryAll<DocumentRow>(
-      "select id, company_id as companyId, type, title, content, author_agent_id as authorAgentId, reviewer_agent_id as reviewerAgentId, project_id as projectId, goal_id as goalId, parent_doc_id as parentDocId, version, status, tags_json as tagsJson, latest_revision_id as latestRevisionId, created_at as createdAt, updated_at as updatedAt from documents where company_id = ? order by updated_at desc",
-      token.companyId,
-    ).map((d) => ({ ...d, latestRevisionId: d.latestRevisionId ?? null }));
+    const docs = db.listDocuments(token.companyId);
     server.json(res, 200, docs);
   });
 
@@ -188,11 +172,7 @@ export function registerFileRoutes(server: AgentApiServer) {
       server.json(res, 400, { error: "Missing documentId" });
       return;
     }
-    const docRows = db.queryAll<DocumentLookupRow>(
-      "select id, company_id as companyId, type, title, content, author_agent_id as authorAgentId, reviewer_agent_id as reviewerAgentId, project_id as projectId, goal_id as goalId, version, status, tags_json as tagsJson from documents where id = ? and company_id = ? limit 1",
-      documentId, token.companyId,
-    );
-    const doc = docRows[0] ?? null;
+    const doc = db.getDocumentForUpdate(documentId, token.companyId);
     if (!doc) {
       server.json(res, 404, { error: "Document not found in this company" });
       return;
diff --git a/src/main/database.ts b/src/main/database.ts
index d2b1f2dd..d244f98b 100644
--- a/src/main/database.ts
+++ b/src/main/database.ts
@@ -83,6 +83,8 @@ export class AppDatabase extends AppDatabaseBase {
 
   saveDocument(input: { id?: string | null; companyId: string; type: string; title: string; content?: string; authorAgentId?: string | null; reviewerAgentId?: string | null; projectId?: string | null; goalId?: string | null; parentDocId?: string | null; version?: number; status?: string; tagsJson?: string; sourceRunId?: string | null }) { return this.documentsMod.saveDocument(input); }
   listImportantDocsForReview(input: { companyId: string; types: readonly string[]; authorAgentId: string | null; taskId: string; limit?: number }) { return this.documentsMod.listImportantDocsForReview(input); }
+  listDocuments(companyId: string) { return this.documentsMod.listDocuments(companyId); }
+  getDocumentForUpdate(documentId: string, companyId: string) { return this.documentsMod.getDocumentForUpdate(documentId, companyId); }
   updateDocumentStatus(id: string, companyId: string, status: string) { this.documentsMod.updateDocumentStatus(id, companyId, status); }
   deleteDocument(id: string, companyId: string) { this.documentsMod.deleteDocument(id, companyId); }
   createDocumentRevision(input: { documentId: string; companyId: string; body: string; changeSummary?: string | null; createdByAgentId?: string | null; createdByUserId?: string | null }) { return this.documentsMod.createDocumentRevision(input); }
diff --git a/src/main/database/documents.ts b/src/main/database/documents.ts
index d0409ac3..dbb028f8 100644
--- a/src/main/database/documents.ts
+++ b/src/main/database/documents.ts
@@ -4,6 +4,49 @@ import type { AgentRecord } from "@shared/types";
 import type { ReadAll, SqliteRow, Transaction } from "./helpers";
 import { ensureId, nowIso, parseJson } from "./helpers";
 
+/**
+ * Document row shape returned by listDocuments — used by
+ * GET /api/companies/:companyId/documents. Mirrors the historical inline
+ * SQL projection so HTTP response bodies stay byte-stable for clients.
+ */
+export type DocumentListRow = {
+  id: string;
+  companyId: string;
+  type: string;
+  title: string;
+  content: string;
+  authorAgentId: string;
+  reviewerAgentId: string | null;
+  projectId: string | null;
+  goalId: string | null;
+  parentDocId: string | null;
+  version: number;
+  status: string;
+  tagsJson: string;
+  latestRevisionId: string | null;
+  createdAt: string;
+  updatedAt: string;
+};
+
+/**
+ * Document lookup row used by the PATCH document handler — narrower
+ * projection without parent_doc_id / latest_revision_id / timestamps.
+ */
+export type DocumentLookupRow = {
+  id: string;
+  companyId: string;
+  type: string;
+  title: string;
+  content: string;
+  authorAgentId: string;
+  reviewerAgentId: string | null;
+  projectId: string | null;
+  goalId: string | null;
+  version: number;
+  status: string;
+  tagsJson: string;
+};
+
 export function buildDocumentMethods(
   getDb: () => DatabaseSync,
   readAll: ReadAll,
@@ -31,6 +74,33 @@ export function buildDocumentMethods(
       return id;
     },
 
+    /**
+     * Returns all documents for a company, ordered by updated_at desc.
+     * Used by GET /api/companies/:companyId/documents.
+     */
+    listDocuments(companyId: string): DocumentListRow[] {
+      return readAll<DocumentListRow>(
+        "select id, company_id as companyId, type, title, content, author_agent_id as authorAgentId, reviewer_agent_id as reviewerAgentId, project_id as projectId, goal_id as goalId, parent_doc_id as parentDocId, version, status, tags_json as tagsJson, latest_revision_id as latestRevisionId, created_at as createdAt, updated_at as updatedAt from documents where company_id = ? order by updated_at desc",
+        companyId,
+      ).map((d) => ({ ...d, latestRevisionId: d.latestRevisionId ?? null }));
+    },
+
+    /**
+     * Returns the lookup row needed for PATCH /api/companies/:companyId/documents/:documentId.
+     * Returns null when the document is missing or belongs to another company.
+     */
+    getDocumentForUpdate(
+      documentId: string,
+      companyId: string,
+    ): DocumentLookupRow | null {
+      const row = getDb()
+        .prepare(
+          "select id, company_id as companyId, type, title, content, author_agent_id as authorAgentId, reviewer_agent_id as reviewerAgentId, project_id as projectId, goal_id as goalId, version, status, tags_json as tagsJson from documents where id = ? and company_id = ? limit 1",
+        )
+        .get(documentId, companyId) as DocumentLookupRow | undefined;
+      return row ?? null;
+    },
+
     updateDocumentStatus(id: string, companyId: string, status: string): void {
       getDb().prepare(
         "UPDATE documents SET status = ?, updated_at = ? WHERE id = ? AND company_id = ?",